Update Chickadee manual and home page for 0.3.0.

Better late than never!
author: David Thompson <dthompson2@worcester.edu> 2018-12-12 09:20:10 -0500
committer: David Thompson <dthompson2@worcester.edu> 2018-12-12 09:20:10 -0500
commit: f16fed3d50fd3d56deb46a3d4641a81460e389de (patch)
tree: 71659ed643b65eadb17110b3f8f0c5d5cfdd3031
parent: c4b418c2dcfba3c741f67058a51a3e490aa4b297 (diff)
37 files changed, 3209 insertions, 652 deletions
diff --git a/haunt.scm b/haunt.scm
index 0e876fe..798567c 100644
--- a/haunt.scm
+++ b/haunt.scm
@@ -508,25 +508,24 @@ and smile, because you've just generated your first Haunt site!"))
    #:manual? #t
    #:description
    `((p "Chickadee is a game development toolkit for "
-        ,(anchor "Guile Scheme" "https://gnu.org/s/guile")
-        " built on top of "
-        ,(anchor "SDL2" "http://libsdl.org")
-        " and OpenGL.")
+        ,(anchor "Guile Scheme" "https://gnu.org/s/guile") ".")
      ,(centered-image "/images/chickadee/logo.png" "Chickadee logo")
      (p "Chickadee aims to provide all the features that
-parenthetically inclined game developers need to make 2D (and
-eventually 3D) games in Scheme, such as:")
+parenthetically inclined game developers need to make games in Scheme,
+such as:")
      (ul
       (li "extensible, fixed-timestep game loop")
       (li "OpenGL-based rendering engine")
-      (li "keyboard, mouse, controller input")
-      (li "REPL-driven development model"))
+      (li "keyboard, mouse, controller input events")
+      (li "vectors, matrices, bounding boxes, easing functions, etc.")
+      (li "asynchronous scripting"))
      (p "Here is a simple example:")
      ,(highlight-scheme
        "(use-modules (chickadee)
              (chickadee math vector)
              (chickadee render sprite)
-             (chickadee render texture))
+             (chickadee render texture)
+             (chickadee sdl))
 
 (define sprite #f)
 
@@ -534,12 +533,9 @@ eventually 3D) games in Scheme, such as:")
   (set! sprite (load-image \"images/chickadee.png\")))
 
 (define (draw alpha)
-  (draw-sprite sprite (vec2 256.0 176.0)))
-
-(add-hook! load-hook load)
-(add-hook! draw-hook draw)
+  (draw-sprite sprite #v(256.0 176.0)))
 
-(run-game)
+(run-game/sdl #:load load #:draw draw)
 ")
      (p (small ,(anchor "chickadee sprite by Refuzzle, CC0"
                         "http://opengameart.org/content/winter-birds"))))
diff --git a/manuals/chickadee/API-Reference.html b/manuals/chickadee/API-Reference.html
index 0dcd1de..d5fdbbe 100644
--- a/manuals/chickadee/API-Reference.html
+++ b/manuals/chickadee/API-Reference.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: API Reference</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>API Reference (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: API Reference">
-<meta name="keywords" content="The Chickadee Game Toolkit: API Reference">
+<meta name="description" content="API Reference (The Chickadee Game Toolkit)">
+<meta name="keywords" content="API Reference (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
@@ -99,13 +99,11 @@ Next: <a href="Copying-This-Manual.html#Copying-This-Manual" accesskey="n" rel="
 <table class="menu" border="0" cellspacing="0">
 <tr><td align="left" valign="top">&bull; <a href="Kernel.html#Kernel" accesskey="1">Kernel</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">The fundamental components.
 </td></tr>
-<tr><td align="left" valign="top">&bull; <a href="Input.html#Input" accesskey="2">Input</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Keyboard, mouse, and controller input.
-</td></tr>
-<tr><td align="left" valign="top">&bull; <a href="Math.html#Math" accesskey="3">Math</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Linear algebra and more.
+<tr><td align="left" valign="top">&bull; <a href="Math.html#Math" accesskey="2">Math</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Linear algebra, spatial partitioning, and more.
 </td></tr>
-<tr><td align="left" valign="top">&bull; <a href="Graphics.html#Graphics" accesskey="4">Graphics</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Eye candy.
+<tr><td align="left" valign="top">&bull; <a href="Graphics.html#Graphics" accesskey="3">Graphics</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Eye candy.
 </td></tr>
-<tr><td align="left" valign="top">&bull; <a href="Audio.html#Audio" accesskey="5">Audio</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Sound effects and music.
+<tr><td align="left" valign="top">&bull; <a href="Scripting.html#Scripting" accesskey="4">Scripting</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Bringing the game world to life.
 </td></tr>
 </table>
 
diff --git a/manuals/chickadee/Agendas.html b/manuals/chickadee/Agendas.html
new file mode 100644
index 0000000..eced92c
--- /dev/null
+++ b/manuals/chickadee/Agendas.html
@@ -0,0 +1,221 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- Copyright (C) 2017  David Thompson davet@gnu.org
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled "GNU
+Free Documentation License".
+
+A copy of the license is also available from the Free Software
+Foundation Web site at http://www.gnu.org/licenses/fdl.html.
+
+
+The document was typeset with
+http://www.texinfo.org/ (GNU Texinfo).
+ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Agendas (The Chickadee Game Toolkit)</title>
+
+<meta name="description" content="Agendas (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Agendas (The Chickadee Game Toolkit)">
+<meta name="resource-type" content="document">
+<meta name="distribution" content="global">
+<meta name="Generator" content="makeinfo">
+<link href="index.html#Top" rel="start" title="Top">
+<link href="Index.html#Index" rel="index" title="Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Scripting.html#Scripting" rel="up" title="Scripting">
+<link href="Scripts.html#Scripts" rel="next" title="Scripts">
+<link href="Scripting.html#Scripting" rel="prev" title="Scripting">
+<style type="text/css">
+<!--
+a.summary-letter {text-decoration: none}
+blockquote.indentedblock {margin-right: 0em}
+blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
+blockquote.smallquotation {font-size: smaller}
+div.display {margin-left: 3.2em}
+div.example {margin-left: 3.2em}
+div.lisp {margin-left: 3.2em}
+div.smalldisplay {margin-left: 3.2em}
+div.smallexample {margin-left: 3.2em}
+div.smalllisp {margin-left: 3.2em}
+kbd {font-style: oblique}
+pre.display {font-family: inherit}
+pre.format {font-family: inherit}
+pre.menu-comment {font-family: serif}
+pre.menu-preformatted {font-family: serif}
+pre.smalldisplay {font-family: inherit; font-size: smaller}
+pre.smallexample {font-size: smaller}
+pre.smallformat {font-family: inherit; font-size: smaller}
+pre.smalllisp {font-size: smaller}
+span.nolinebreak {white-space: nowrap}
+span.roman {font-family: initial; font-weight: normal}
+span.sansserif {font-family: sans-serif; font-weight: normal}
+ul.no-bullet {list-style: none}
+@media (min-width: 1140px) {
+    body {
+        margin-left: 14rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (min-width: 800px) and (max-width: 1140px) {
+    body {
+        margin-left: 6rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (max-width: 800px) {
+    body {
+        margin: 1rem;
+    }
+}
+
+-->
+</style>
+<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
+
+
+</head>
+
+<body lang="en">
+<a name="Agendas"></a>
+<div class="header">
+<p>
+Next: <a href="Scripts.html#Scripts" accesskey="n" rel="next">Scripts</a>, Up: <a href="Scripting.html#Scripting" accesskey="u" rel="up">Scripting</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Agendas-1"></a>
+<h4 class="subsection">2.4.1 Agendas</h4>
+
+<p>To schedule a task to be performed later, an &ldquo;agenda&rdquo; is used.
+There is a default, global agenda that is ready to be used, or
+additional agendas may be created for different purposes.  The
+following example prints the text &ldquo;hello&rdquo; when the agenda has
+advanced to time unit 10.
+</p>
+<div class="example">
+<pre class="example">(at 10 (display &quot;hello\n&quot;))
+</pre></div>
+
+<p>Most of the time it is more convenient to schedule tasks relative to
+the current time.  This is where <code>after</code> comes in handy:
+</p>
+<div class="example">
+<pre class="example">(after 10 (display &quot;hello\n&quot;))
+</pre></div>
+
+<p>Time units in the agenda are in no way connected to real time.  It&rsquo;s
+up to the programmer to decide what agenda time means.  A simple and
+effective approach is to map each call of the update hook
+(see <a href="Kernel.html#Kernel">Kernel</a>) to 1 unit of agenda time, like so:
+</p>
+<div class="example">
+<pre class="example">(add-hook! update-hook (lambda (dt) (update-agenda 1)))
+</pre></div>
+
+<p>It is important to call <code>update-agenda</code> periodically, otherwise
+no tasks will ever be run!
+</p>
+<p>In addition to using the global agenda, it is useful to have multiple
+agendas for different purposes.  For example, the game world can use a
+different agenda than the user interface, so that pausing the game is
+a simple matter of not updating the world&rsquo;s agenda while continuing to
+update the user interface&rsquo;s agenda.  The current agenda is dynamically
+scoped and can be changed using the <code>with-agenda</code> special form:
+</p>
+<div class="example">
+<pre class="example">(define game-world-agenda (make-agenda))
+
+(with-agenda game-world-agenda
+  (at 60 (spawn-goblin))
+  (at 120 (spawn-goblin))
+  (at 240 (spawn-goblin-king)))
+</pre></div>
+
+<dl>
+<dt><a name="index-make_002dagenda"></a>Procedure: <strong>make-agenda</strong></dt>
+<dd><p>Return a new task scheduler.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-agenda_003f"></a>Procedure: <strong>agenda?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is an agenda.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-current_002dagenda"></a>Procedure: <strong>current-agenda</strong></dt>
+<dt><a name="index-current_002dagenda-1"></a>Procedure: <strong>current-agenda</strong> <em><var>agenda</var></em></dt>
+<dd><p>When called with no arguments, return the current agenda.  When called
+with one argument, set the current agenda to <var>agenda</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-with_002dagenda"></a>Syntax: <strong>with-agenda</strong> <em><var>agenda</var> <var>body</var> &hellip;</em></dt>
+<dd><p>Evaluate <var>body</var> with the current agenda set to <var>agenda</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-agenda_002dtime"></a>Procedure: <strong>agenda-time</strong></dt>
+<dd><p>Return the current agenda time.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-update_002dagenda"></a>Procedure: <strong>update-agenda</strong> <em><var>dt</var></em></dt>
+<dd><p>Advance the current agenda by <var>dt</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-schedule_002dat"></a>Procedure: <strong>schedule-at</strong> <em><var>time</var> <var>thunk</var></em></dt>
+<dd><p>Schedule <var>thunk</var>, a procedure of zero arguments, to be run at
+<var>time</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-schedule_002dafter"></a>Procedure: <strong>schedule-after</strong> <em><var>delay</var> <var>thunk</var></em></dt>
+<dd><p>Schedule <var>thunk</var>, a procedure of zero arguments, to be run after
+<var>delay</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-schedule_002devery"></a>Procedure: <strong>schedule-every</strong> <em><var>interval</var> <var>thunk</var> [<var>n</var>]</em></dt>
+<dd><p>Schedule <var>thunk</var>, a procedure of zero arguments, to be run every
+<var>interval</var> amount of time.  Repeat this <var>n</var> times, or
+indefinitely if not specified.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-at"></a>Syntax: <strong>at</strong> <em><var>time</var> <var>body</var> &hellip;</em></dt>
+<dd><p>Schedule <var>body</var> to be evaluated at <var>time</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-after"></a>Syntax: <strong>after</strong> <em><var>delay</var> <var>body</var> &hellip;</em></dt>
+<dd><p>Schedule <var>body</var> to be evaluated after <var>delay</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-every"></a>Syntax: <strong>every</strong> <em><var>interval</var> <var>body</var> &hellip;</em></dt>
+<dt><a name="index-every-1"></a>Syntax: <strong>every</strong> <em>(<var>interval</var> <var>n</var>) <var>body</var> &hellip;</em></dt>
+<dd><p>Schedule <var>body</var> to be evaluated every <var>interval</var> amount of
+time.  Repeat this <var>n</var> times, or indefinitely if not specified.
+</p></dd></dl>
+
+<hr>
+<div class="header">
+<p>
+Next: <a href="Scripts.html#Scripts" accesskey="n" rel="next">Scripts</a>, Up: <a href="Scripting.html#Scripting" accesskey="u" rel="up">Scripting</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+
+
+
+</body>
+</html>
diff --git a/manuals/chickadee/Audio.html b/manuals/chickadee/Audio.html
deleted file mode 100644
index 755efb9..0000000
--- a/manuals/chickadee/Audio.html
+++ /dev/null
@@ -1,177 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
-<html>
-<!-- Copyright (C) 2017  David Thompson davet@gnu.org
-
-Permission is granted to copy, distribute and/or modify this document
-under the terms of the GNU Free Documentation License, Version 1.3
-or any later version published by the Free Software Foundation;
-with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
-A copy of the license is included in the section entitled "GNU
-Free Documentation License".
-
-A copy of the license is also available from the Free Software
-Foundation Web site at http://www.gnu.org/licenses/fdl.html.
-
-
-The document was typeset with
-http://www.texinfo.org/ (GNU Texinfo).
- -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
-<head>
-<title>The Chickadee Game Toolkit: Audio</title>
-
-<meta name="description" content="The Chickadee Game Toolkit: Audio">
-<meta name="keywords" content="The Chickadee Game Toolkit: Audio">
-<meta name="resource-type" content="document">
-<meta name="distribution" content="global">
-<meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
-<link href="index.html#Top" rel="start" title="Top">
-<link href="Index.html#Index" rel="index" title="Index">
-<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
-<link href="API-Reference.html#API-Reference" rel="up" title="API Reference">
-<link href="Copying-This-Manual.html#Copying-This-Manual" rel="next" title="Copying This Manual">
-<link href="Viewports.html#Viewports" rel="prev" title="Viewports">
-<style type="text/css">
-<!--
-a.summary-letter {text-decoration: none}
-blockquote.indentedblock {margin-right: 0em}
-blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
-blockquote.smallquotation {font-size: smaller}
-div.display {margin-left: 3.2em}
-div.example {margin-left: 3.2em}
-div.lisp {margin-left: 3.2em}
-div.smalldisplay {margin-left: 3.2em}
-div.smallexample {margin-left: 3.2em}
-div.smalllisp {margin-left: 3.2em}
-kbd {font-style: oblique}
-pre.display {font-family: inherit}
-pre.format {font-family: inherit}
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-pre.menu-preformatted {font-family: serif}
-pre.smalldisplay {font-family: inherit; font-size: smaller}
-pre.smallexample {font-size: smaller}
-pre.smallformat {font-family: inherit; font-size: smaller}
-pre.smalllisp {font-size: smaller}
-span.nolinebreak {white-space: nowrap}
-span.roman {font-family: initial; font-weight: normal}
-span.sansserif {font-family: sans-serif; font-weight: normal}
-ul.no-bullet {list-style: none}
-@media (min-width: 1140px) {
-    body {
-        margin-left: 14rem;
-        margin-right: 4rem;
-        max-width: 52rem;
-    }
-}
-
-@media (min-width: 800px) and (max-width: 1140px) {
-    body {
-        margin-left: 6rem;
-        margin-right: 4rem;
-        max-width: 52rem;
-    }
-}
-
-@media (max-width: 800px) {
-    body {
-        margin: 1rem;
-    }
-}
-
--->
-</style>
-<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
-
-
-</head>
-
-<body lang="en">
-<a name="Audio"></a>
-<div class="header">
-<p>
-Previous: <a href="Graphics.html#Graphics" accesskey="p" rel="prev">Graphics</a>, Up: <a href="API-Reference.html#API-Reference" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
-</div>
-<hr>
-<a name="Audio-1"></a>
-<h3 class="section">2.5 Audio</h3>
-
-<p>Chickadee has two data types for audio: samples and music.  Samples
-are for short sound effects like explosions.  Music is for, well,
-uh&hellip;, music.
-</p>
-<p>Supported file formats include WAV and OGG.
-</p>
-<dl>
-<dt><a name="index-load_002dsample"></a>Scheme Procedure: <strong>load-sample</strong> <em><var>file</var></em></dt>
-<dd><p>Load audio sample from <var>file</var>.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-set_002dsample_002dvolume_0021"></a>Scheme Procedure: <strong>set-sample-volume!</strong> <em><var>volume</var></em></dt>
-<dd><p>Set the volume that all samples are played at to <var>volume</var>, an
-integer value between 0 and 128.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-play_002dsample"></a>Scheme Procedure: <strong>play-sample</strong> <em><var>sample</var></em></dt>
-<dd><p>Play <var>sample</var>.  Pretty straightforward!
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-load_002dmusic"></a>Scheme Procedure: <strong>load-music</strong> <em><var>file</var></em></dt>
-<dd><p>Load music from <var>file</var>.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-music_002dvolume"></a>Scheme Procedure: <strong>music-volume</strong></dt>
-<dd><p>Return the volume level for music, an integer value between 0 and 128.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-set_002dmusic_002dvolume_0021"></a>Scheme Procedure: <strong>set-music-volume!</strong> <em><var>volume</var></em></dt>
-<dd><p>Set the volume that music is played at to <var>volume</var>, an integer
-value between 0 and 128.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-play_002dmusic"></a>Scheme Procedure: <strong>play-music</strong> <em><var>music</var> [<var>loop?</var>]</em></dt>
-<dd><p>Play <var>music</var>.  If <var>loop?</var>, play it over and over and over and
-over and&hellip;
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-pause_002dmusic"></a>Scheme Procedure: <strong>pause-music</strong></dt>
-<dd><p>Pause the current music track.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-resume_002dmusic"></a>Scheme Procedure: <strong>resume-music</strong></dt>
-<dd><p>Resume the current music track.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-rewind_002dmusic"></a>Scheme Procedure: <strong>rewind-music</strong></dt>
-<dd><p>estart the current music track from the beginning.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-stop_002dmusic"></a>Scheme Procedure: <strong>stop-music</strong></dt>
-<dd><p>Stop playing the current music track.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-music_002dplaying_003f"></a>Scheme Procedure: <strong>music-playing?</strong></dt>
-<dd><p>Return <code>#t</code> if music is currently playing.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-music_002dpaused_003f"></a>Scheme Procedure: <strong>music-paused?</strong></dt>
-<dd><p>Return <code>#t</code> if music is currently paused.
-</p></dd></dl>
-
-
-
-
-</body>
-</html>
diff --git a/manuals/chickadee/Input.html b/manuals/chickadee/Basics.html
index d559126..dd3898c 100644
--- a/manuals/chickadee/Input.html
+++ b/manuals/chickadee/Basics.html
@@ -16,22 +16,22 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Input</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Basics (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Input">
-<meta name="keywords" content="The Chickadee Game Toolkit: Input">
+<meta name="description" content="Basics (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Basics (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
-<link href="API-Reference.html#API-Reference" rel="up" title="API Reference">
-<link href="Math.html#Math" rel="next" title="Math">
-<link href="Kernel.html#Kernel" rel="prev" title="Kernel">
+<link href="Math.html#Math" rel="up" title="Math">
+<link href="Vectors.html#Vectors" rel="next" title="Vectors">
+<link href="Math.html#Math" rel="prev" title="Math">
 <style type="text/css">
 <!--
 a.summary-letter {text-decoration: none}
@@ -87,14 +87,32 @@ ul.no-bullet {list-style: none}
 </head>
 
 <body lang="en">
-<a name="Input"></a>
+<a name="Basics"></a>
 <div class="header">
 <p>
-Next: <a href="Math.html#Math" accesskey="n" rel="next">Math</a>, Previous: <a href="Kernel.html#Kernel" accesskey="p" rel="prev">Kernel</a>, Up: <a href="API-Reference.html#API-Reference" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+Next: <a href="Vectors.html#Vectors" accesskey="n" rel="next">Vectors</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
 </div>
 <hr>
-<a name="Input-1"></a>
-<h3 class="section">2.2 Input</h3>
+<a name="Basics-1"></a>
+<h4 class="subsection">2.2.1 Basics</h4>
+
+<dl>
+<dt><a name="index-pi"></a>Variable: <strong>pi</strong></dt>
+<dd><p>An essential constant for all trigonometry.  <code>&#x03C0;</code> is the ratio
+of a circle&rsquo;s circumferences to its diameter.  Since <code>&#x03C0;</code> is an
+irrational number, the <var>pi</var> in Chickadee is a mere floating point
+approximation that is &ldquo;good enough.&rdquo;
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-pi_002f2"></a>Variable: <strong>pi/2</strong></dt>
+<dd><p>Half of <var>pi</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-cotan"></a>Procedure: <strong>cotan</strong> <em><var>z</var></em></dt>
+<dd><p>Return the cotangent of <var>z</var>.
+</p></dd></dl>
 
 
 
diff --git a/manuals/chickadee/Bezier-Curves.html b/manuals/chickadee/Bezier-Curves.html
new file mode 100644
index 0000000..6a49b59
--- /dev/null
+++ b/manuals/chickadee/Bezier-Curves.html
@@ -0,0 +1,174 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- Copyright (C) 2017  David Thompson davet@gnu.org
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled "GNU
+Free Documentation License".
+
+A copy of the license is also available from the Free Software
+Foundation Web site at http://www.gnu.org/licenses/fdl.html.
+
+
+The document was typeset with
+http://www.texinfo.org/ (GNU Texinfo).
+ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Bezier Curves (The Chickadee Game Toolkit)</title>
+
+<meta name="description" content="Bezier Curves (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Bezier Curves (The Chickadee Game Toolkit)">
+<meta name="resource-type" content="document">
+<meta name="distribution" content="global">
+<meta name="Generator" content="makeinfo">
+<link href="index.html#Top" rel="start" title="Top">
+<link href="Index.html#Index" rel="index" title="Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Math.html#Math" rel="up" title="Math">
+<link href="Path-Finding.html#Path-Finding" rel="next" title="Path Finding">
+<link href="Easings.html#Easings" rel="prev" title="Easings">
+<style type="text/css">
+<!--
+a.summary-letter {text-decoration: none}
+blockquote.indentedblock {margin-right: 0em}
+blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
+blockquote.smallquotation {font-size: smaller}
+div.display {margin-left: 3.2em}
+div.example {margin-left: 3.2em}
+div.lisp {margin-left: 3.2em}
+div.smalldisplay {margin-left: 3.2em}
+div.smallexample {margin-left: 3.2em}
+div.smalllisp {margin-left: 3.2em}
+kbd {font-style: oblique}
+pre.display {font-family: inherit}
+pre.format {font-family: inherit}
+pre.menu-comment {font-family: serif}
+pre.menu-preformatted {font-family: serif}
+pre.smalldisplay {font-family: inherit; font-size: smaller}
+pre.smallexample {font-size: smaller}
+pre.smallformat {font-family: inherit; font-size: smaller}
+pre.smalllisp {font-size: smaller}
+span.nolinebreak {white-space: nowrap}
+span.roman {font-family: initial; font-weight: normal}
+span.sansserif {font-family: sans-serif; font-weight: normal}
+ul.no-bullet {list-style: none}
+@media (min-width: 1140px) {
+    body {
+        margin-left: 14rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (min-width: 800px) and (max-width: 1140px) {
+    body {
+        margin-left: 6rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (max-width: 800px) {
+    body {
+        margin: 1rem;
+    }
+}
+
+-->
+</style>
+<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
+
+
+</head>
+
+<body lang="en">
+<a name="Bezier-Curves"></a>
+<div class="header">
+<p>
+Next: <a href="Path-Finding.html#Path-Finding" accesskey="n" rel="next">Path Finding</a>, Previous: <a href="Easings.html#Easings" accesskey="p" rel="prev">Easings</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Bezier-Curves-1"></a>
+<h4 class="subsection">2.2.8 Bezier Curves</h4>
+
+<p>The <code>(chickadee math bezier)</code> module provides an API for
+describing cubic Bezier curves in 2D space.  These curves are notably
+used in font description, vector graphics programs, and when it comes
+to games: path building.  With Bezier curves, it&rsquo;s somewhat easy to
+create a smooth looking path for an enemy to move along, for example.
+Bezier curves become particularly interesting when they are chained
+together to form a Bezier &ldquo;path&rdquo;, where the end point of one curve
+becomes the starting point of the next.
+</p>
+<p>Currently, the rendering of Bezier curves is rather crude and provided
+mostly for visualizing and debugging curves that would be unseen in
+the final game.  See See <a href="Lines-and-Shapes.html#Lines-and-Shapes">Lines and Shapes</a> for more information.
+</p>
+<dl>
+<dt><a name="index-make_002dbezier_002dcurve"></a>Procedure: <strong>make-bezier-curve</strong> <em><var>p0</var> <var>p1</var> <var>p2</var> <var>p3</var></em></dt>
+<dd><p>Return a new Bezier curve object whose starting point is <var>p0</var>,
+ending point is <var>p3</var>, and control points are <var>p1</var> and
+<var>p2</var>.  All points are 2D vectors.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-bezier_002dcurve_003f"></a>Procedure: <strong>bezier-curve?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is a Bezier curve.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-bezier_002dcurve_002dp0"></a>Procedure: <strong>bezier-curve-p0</strong> <em><var>bezier</var></em></dt>
+<dd><p>Return the starting point of <var>bezier</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-bezier_002dcurve_002dp1"></a>Procedure: <strong>bezier-curve-p1</strong> <em><var>bezier</var></em></dt>
+<dd><p>Return the first control point of <var>bezier</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-bezier_002dcurve_002dp2"></a>Procedure: <strong>bezier-curve-p2</strong> <em><var>bezier</var></em></dt>
+<dd><p>Return the second control point of <var>bezier</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-bezier_002dcurve_002dp3"></a>Procedure: <strong>bezier-curve-p3</strong> <em><var>bezier</var></em></dt>
+<dd><p>Return the end point of <var>bezier</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-bezier_002dpath"></a>Procedure: <strong>bezier-path</strong> <em>. <var>control-points</var></em></dt>
+<dd><p>Return a list of connected bezier curves defined by
+<var>control-points</var>.  The first curve is defined by the first 4
+arguments and every additional curve thereafter requires 3 additional
+arguments.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-bezier_002dcurve_002dpoint_002dat"></a>Procedure: <strong>bezier-curve-point-at</strong> <em><var>bezier</var> <var>t</var></em></dt>
+<dd><p>Return the coordinates for <var>bezier</var> at <var>t</var> (a value in the
+range [0, 1] representing how far from the start of the curve to
+check) as a 2D vector.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-bezier_002dcurve_002dpoint_002dat_0021"></a>Procedure: <strong>bezier-curve-point-at!</strong> <em><var>dest</var> <var>bezier</var> <var>t</var></em></dt>
+<dd><p>Modify the 2D vector <var>dest</var> in-place to contain the coordinates
+for <var>bezier</var> at <var>t</var>.
+</p></dd></dl>
+
+<hr>
+<div class="header">
+<p>
+Next: <a href="Path-Finding.html#Path-Finding" accesskey="n" rel="next">Path Finding</a>, Previous: <a href="Easings.html#Easings" accesskey="p" rel="prev">Easings</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+
+
+
+</body>
+</html>
diff --git a/manuals/chickadee/Blending-and-Depth-Testing.html b/manuals/chickadee/Blending-and-Depth-Testing.html
index 72b6140..2591a95 100644
--- a/manuals/chickadee/Blending-and-Depth-Testing.html
+++ b/manuals/chickadee/Blending-and-Depth-Testing.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Blending and Depth Testing</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Blending and Depth Testing (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Blending and Depth Testing">
-<meta name="keywords" content="The Chickadee Game Toolkit: Blending and Depth Testing">
+<meta name="description" content="Blending and Depth Testing (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Blending and Depth Testing (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
@@ -94,7 +94,7 @@ Next: <a href="Vertex-Arrays.html#Vertex-Arrays" accesskey="n" rel="next">Vertex
 </div>
 <hr>
 <a name="Blending-and-Depth-Testing-1"></a>
-<h4 class="subsection">2.4.6 Blending and Depth Testing</h4>
+<h4 class="subsection">2.3.7 Blending and Depth Testing</h4>
 
 
 
diff --git a/manuals/chickadee/Channels.html b/manuals/chickadee/Channels.html
new file mode 100644
index 0000000..f313c4f
--- /dev/null
+++ b/manuals/chickadee/Channels.html
@@ -0,0 +1,146 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- Copyright (C) 2017  David Thompson davet@gnu.org
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled "GNU
+Free Documentation License".
+
+A copy of the license is also available from the Free Software
+Foundation Web site at http://www.gnu.org/licenses/fdl.html.
+
+
+The document was typeset with
+http://www.texinfo.org/ (GNU Texinfo).
+ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Channels (The Chickadee Game Toolkit)</title>
+
+<meta name="description" content="Channels (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Channels (The Chickadee Game Toolkit)">
+<meta name="resource-type" content="document">
+<meta name="distribution" content="global">
+<meta name="Generator" content="makeinfo">
+<link href="index.html#Top" rel="start" title="Top">
+<link href="Index.html#Index" rel="index" title="Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Scripting.html#Scripting" rel="up" title="Scripting">
+<link href="Copying-This-Manual.html#Copying-This-Manual" rel="next" title="Copying This Manual">
+<link href="Tweening.html#Tweening" rel="prev" title="Tweening">
+<style type="text/css">
+<!--
+a.summary-letter {text-decoration: none}
+blockquote.indentedblock {margin-right: 0em}
+blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
+blockquote.smallquotation {font-size: smaller}
+div.display {margin-left: 3.2em}
+div.example {margin-left: 3.2em}
+div.lisp {margin-left: 3.2em}
+div.smalldisplay {margin-left: 3.2em}
+div.smallexample {margin-left: 3.2em}
+div.smalllisp {margin-left: 3.2em}
+kbd {font-style: oblique}
+pre.display {font-family: inherit}
+pre.format {font-family: inherit}
+pre.menu-comment {font-family: serif}
+pre.menu-preformatted {font-family: serif}
+pre.smalldisplay {font-family: inherit; font-size: smaller}
+pre.smallexample {font-size: smaller}
+pre.smallformat {font-family: inherit; font-size: smaller}
+pre.smalllisp {font-size: smaller}
+span.nolinebreak {white-space: nowrap}
+span.roman {font-family: initial; font-weight: normal}
+span.sansserif {font-family: sans-serif; font-weight: normal}
+ul.no-bullet {list-style: none}
+@media (min-width: 1140px) {
+    body {
+        margin-left: 14rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (min-width: 800px) and (max-width: 1140px) {
+    body {
+        margin-left: 6rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (max-width: 800px) {
+    body {
+        margin: 1rem;
+    }
+}
+
+-->
+</style>
+<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
+
+
+</head>
+
+<body lang="en">
+<a name="Channels"></a>
+<div class="header">
+<p>
+Previous: <a href="Tweening.html#Tweening" accesskey="p" rel="prev">Tweening</a>, Up: <a href="Scripting.html#Scripting" accesskey="u" rel="up">Scripting</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Channels-1"></a>
+<h4 class="subsection">2.4.4 Channels</h4>
+
+<p>Channels are a tool for communicating amongst different scripts.  One
+script can write a value to the channel and another can read from it.
+Reading or writing to a channel suspends that script until there is
+someone on the other end of the line to complete the transaction.
+</p>
+<p>Here&rsquo;s a simplistic example:
+</p>
+<div class="example">
+<pre class="example">(define c (make-channel))
+
+(script
+ (forever
+  (let ((item (channel-get c)))
+    (pk 'got item))))
+
+(script
+ (channel-put c 'sword)
+ (channel-put c 'shield)
+ (channel-put c 'potion))
+</pre></div>
+
+<dl>
+<dt><a name="index-make_002dchannel"></a>Procedure: <strong>make-channel</strong></dt>
+<dd><p>Return a new channel
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-channel_003f"></a>Procedure: <strong>channel?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is a channel.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-channel_002dget-1"></a>Procedure: <strong>channel-get</strong> <em><var>channel</var></em></dt>
+<dd><p>Retrieve a value from <var>channel</var>.  The current script suspends
+until a value is available.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-channel_002dput"></a>Procedure: <strong>channel-put</strong> <em><var>channel</var> <var>data</var></em></dt>
+<dd><p>Send <var>data</var> to <var>channel</var>.  The current script suspends until
+another script is available to retrieve the value.
+</p></dd></dl>
+
+
+
+
+</body>
+</html>
diff --git a/manuals/chickadee/Copying-This-Manual.html b/manuals/chickadee/Copying-This-Manual.html
index 493541d..f9a7c77 100644
--- a/manuals/chickadee/Copying-This-Manual.html
+++ b/manuals/chickadee/Copying-This-Manual.html
@@ -16,22 +16,22 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Copying This Manual</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Copying This Manual (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Copying This Manual">
-<meta name="keywords" content="The Chickadee Game Toolkit: Copying This Manual">
+<meta name="description" content="Copying This Manual (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Copying This Manual (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
 <link href="index.html#Top" rel="up" title="Top">
 <link href="GNU-Free-Documentation-License.html#GNU-Free-Documentation-License" rel="next" title="GNU Free Documentation License">
-<link href="Audio.html#Audio" rel="prev" title="Audio">
+<link href="Channels.html#Channels" rel="prev" title="Channels">
 <style type="text/css">
 <!--
 a.summary-letter {text-decoration: none}
diff --git a/manuals/chickadee/Easings.html b/manuals/chickadee/Easings.html
new file mode 100644
index 0000000..55f385c
--- /dev/null
+++ b/manuals/chickadee/Easings.html
@@ -0,0 +1,171 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- Copyright (C) 2017  David Thompson davet@gnu.org
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled "GNU
+Free Documentation License".
+
+A copy of the license is also available from the Free Software
+Foundation Web site at http://www.gnu.org/licenses/fdl.html.
+
+
+The document was typeset with
+http://www.texinfo.org/ (GNU Texinfo).
+ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Easings (The Chickadee Game Toolkit)</title>
+
+<meta name="description" content="Easings (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Easings (The Chickadee Game Toolkit)">
+<meta name="resource-type" content="document">
+<meta name="distribution" content="global">
+<meta name="Generator" content="makeinfo">
+<link href="index.html#Top" rel="start" title="Top">
+<link href="Index.html#Index" rel="index" title="Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Math.html#Math" rel="up" title="Math">
+<link href="Bezier-Curves.html#Bezier-Curves" rel="next" title="Bezier Curves">
+<link href="Quaternions.html#Quaternions" rel="prev" title="Quaternions">
+<style type="text/css">
+<!--
+a.summary-letter {text-decoration: none}
+blockquote.indentedblock {margin-right: 0em}
+blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
+blockquote.smallquotation {font-size: smaller}
+div.display {margin-left: 3.2em}
+div.example {margin-left: 3.2em}
+div.lisp {margin-left: 3.2em}
+div.smalldisplay {margin-left: 3.2em}
+div.smallexample {margin-left: 3.2em}
+div.smalllisp {margin-left: 3.2em}
+kbd {font-style: oblique}
+pre.display {font-family: inherit}
+pre.format {font-family: inherit}
+pre.menu-comment {font-family: serif}
+pre.menu-preformatted {font-family: serif}
+pre.smalldisplay {font-family: inherit; font-size: smaller}
+pre.smallexample {font-size: smaller}
+pre.smallformat {font-family: inherit; font-size: smaller}
+pre.smalllisp {font-size: smaller}
+span.nolinebreak {white-space: nowrap}
+span.roman {font-family: initial; font-weight: normal}
+span.sansserif {font-family: sans-serif; font-weight: normal}
+ul.no-bullet {list-style: none}
+@media (min-width: 1140px) {
+    body {
+        margin-left: 14rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (min-width: 800px) and (max-width: 1140px) {
+    body {
+        margin-left: 6rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (max-width: 800px) {
+    body {
+        margin: 1rem;
+    }
+}
+
+-->
+</style>
+<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
+
+
+</head>
+
+<body lang="en">
+<a name="Easings"></a>
+<div class="header">
+<p>
+Next: <a href="Bezier-Curves.html#Bezier-Curves" accesskey="n" rel="next">Bezier Curves</a>, Previous: <a href="Quaternions.html#Quaternions" accesskey="p" rel="prev">Quaternions</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Easings-1"></a>
+<h4 class="subsection">2.2.7 Easings</h4>
+
+<dl>
+<dt><a name="index-linear"></a>Procedure: <strong>linear</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-smoothstep"></a>Procedure: <strong>smoothstep</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002din_002dquad"></a>Procedure: <strong>ease-in-quad</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002dout_002dquad"></a>Procedure: <strong>ease-out-quad</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002din_002dout_002dquad"></a>Procedure: <strong>ease-in-out-quad</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002din_002dcubic"></a>Procedure: <strong>ease-in-cubic</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002dout_002dcubic"></a>Procedure: <strong>ease-out-cubic</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002din_002dout_002dcubic"></a>Procedure: <strong>ease-in-out-cubic</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002din_002dquart"></a>Procedure: <strong>ease-in-quart</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002dout_002dquart"></a>Procedure: <strong>ease-out-quart</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002din_002dout_002dquart"></a>Procedure: <strong>ease-in-out-quart</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002din_002dquint"></a>Procedure: <strong>ease-in-quint</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002dout_002dquint"></a>Procedure: <strong>ease-out-quint</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002din_002dout_002dquint"></a>Procedure: <strong>ease-in-out-quint</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002din_002dsine"></a>Procedure: <strong>ease-in-sine</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002dout_002dsine"></a>Procedure: <strong>ease-out-sine</strong> <em><var>t</var></em></dt>
+</dl>
+
+<dl>
+<dt><a name="index-ease_002din_002dout_002dsine"></a>Procedure: <strong>ease-in-out-sine</strong> <em><var>t</var></em></dt>
+</dl>
+
+
+
+
+</body>
+</html>
diff --git a/manuals/chickadee/Fonts.html b/manuals/chickadee/Fonts.html
index 198bddb..a4ed5c6 100644
--- a/manuals/chickadee/Fonts.html
+++ b/manuals/chickadee/Fonts.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Fonts</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Fonts (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Fonts">
-<meta name="keywords" content="The Chickadee Game Toolkit: Fonts">
+<meta name="description" content="Fonts (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Fonts (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
@@ -94,7 +94,7 @@ Next: <a href="Blending-and-Depth-Testing.html#Blending-and-Depth-Testing" acces
 </div>
 <hr>
 <a name="Fonts-1"></a>
-<h4 class="subsection">2.4.5 Fonts</h4>
+<h4 class="subsection">2.3.6 Fonts</h4>
 
 <p>Unlike the traditional TrueType font format that many are accustomed
 to, Chickadee loads and renders bitmap fonts in the
@@ -122,9 +122,7 @@ each font size needed.  This is where the &ldquo;signed distance field&rdquo;
 rendering technique comes in.  Introduced by
 <a href="http://www.valvesoftware.com/.../2007/SIGGRAPH2007_AlphaTestedMagnification.pdf">Valve</a> in 2007, signed distance field fonts can be efficiently stored
 in a bitmap and be rendered at arbitrary scale factors with good
-results.  Chickadee can render both traditional bitmap fonts and
-signed distance field fonts.  <em>Signed distance field font
-rendering is not yet available, so be patient.</em>
+results.
 </p>
 <p>While Chickadee does not yet offer a tool for converting TTF fonts
 into FNT fonts, tools such as
@@ -135,44 +133,45 @@ in the meantime.
 font)</code> module.
 </p>
 <dl>
-<dt><a name="index-load_002dfont"></a>Scheme Procedure: <strong>load-font</strong> <em><var>file</var></em></dt>
+<dt><a name="index-load_002dfont"></a>Procedure: <strong>load-font</strong> <em><var>file</var></em></dt>
 <dd><p>Load the Angel Code formatted XML document in <var>file</var> and return a
 new font object.
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-font_003f"></a>Scheme Procedure: <strong>font?</strong> <em><var>obj</var></em></dt>
+<dt><a name="index-font_003f"></a>Procedure: <strong>font?</strong> <em><var>obj</var></em></dt>
 <dd><p>Return <code>#t</code> if <var>obj</var> is a font object.
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-font_002dface"></a>Scheme Procedure: <strong>font-face</strong> <em><var>font</var></em></dt>
+<dt><a name="index-font_002dface"></a>Procedure: <strong>font-face</strong> <em><var>font</var></em></dt>
 <dd><p>Return the name of <var>font</var>.
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-font_002dline_002dheight"></a>Scheme Procedure: <strong>font-line-height</strong> <em><var>font</var></em></dt>
+<dt><a name="index-font_002dline_002dheight"></a>Procedure: <strong>font-line-height</strong> <em><var>font</var></em></dt>
 <dd><p>Return the line height of <var>font</var>.
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-font_002dline_002dheight-1"></a>Scheme Procedure: <strong>font-line-height</strong> <em><var>font</var></em></dt>
+<dt><a name="index-font_002dline_002dheight-1"></a>Procedure: <strong>font-line-height</strong> <em><var>font</var></em></dt>
 <dd><p>Return the line height of <var>font</var>.
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-font_002dbold_003f"></a>Scheme Procedure: <strong>font-bold?</strong> <em><var>font</var></em></dt>
+<dt><a name="index-font_002dbold_003f"></a>Procedure: <strong>font-bold?</strong> <em><var>font</var></em></dt>
 <dd><p>Return <code>#t</code> if <var>font</var> is a bold font.
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-font_002ditalic_003f"></a>Scheme Procedure: <strong>font-italic?</strong> <em><var>font</var></em></dt>
+<dt><a name="index-font_002ditalic_003f"></a>Procedure: <strong>font-italic?</strong> <em><var>font</var></em></dt>
 <dd><p>Return <code>#t</code> if <var>font</var> is an italicized font.
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-draw_002dtext"></a>Scheme Procedure: <strong>draw-text</strong> <em><var>font</var> <var>text</var> <var>position</var></em></dt>
-<dd><p>[#:scale] [#:rotation] [#:blend-mode]
+<dt><a name="index-draw_002dtext"></a>Procedure: <strong>draw-text</strong> <em><var>font</var> <var>text</var> <var>position</var></em></dt>
+<dd><p>[#:origin] [#:scale] [#:rotation] [#:blend-mode]
+       [#:start 0] [#:end <code>(string-length text)</code>]
 </p>
 <p>Draw the string <var>text</var> with the first character starting at
 <var>position</var> using <var>font</var>.
@@ -181,6 +180,9 @@ new font object.
 <pre class="example">(draw-text font &quot;Hello, world!&quot; (vec2 128.0 128.0))
 </pre></div>
 
+<p>To render a substring of <var>text</var>, use the <var>start</var> and <var>end</var>
+arguments.
+</p>
 <p>Refer to <code>draw-sprite</code> (see <a href="Sprites.html#Sprites">Sprites</a>) for information about
 the other arguments.
 </p></dd></dl>
diff --git a/manuals/chickadee/Framebuffers.html b/manuals/chickadee/Framebuffers.html
index c57a82a..d7bedc4 100644
--- a/manuals/chickadee/Framebuffers.html
+++ b/manuals/chickadee/Framebuffers.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Framebuffers</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Framebuffers (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Framebuffers">
-<meta name="keywords" content="The Chickadee Game Toolkit: Framebuffers">
+<meta name="description" content="Framebuffers (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Framebuffers (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
@@ -94,7 +94,50 @@ Next: <a href="Viewports.html#Viewports" accesskey="n" rel="next">Viewports</a>,
 </div>
 <hr>
 <a name="Framebuffers-1"></a>
-<h4 class="subsection">2.4.9 Framebuffers</h4>
+<h4 class="subsection">2.3.10 Framebuffers</h4>
+
+<p>A framebuffer is a chunk of memory that the GPU can render things
+onto.  By default, the framebuffer that is used for rendering is the
+one belonging to the game window, but custom framebuffers can be used
+as well.  A common use-case for custom framebuffers is applying
+post-processing effects: The entire scene is rendered to a
+framebuffer, and then the contents of that framebuffer are applied to
+a post-processing shader and rendered to the game window.  The
+post-processing shader could do any number of things: scaling,
+antialiasing, motion blur, etc.
+</p>
+<dl>
+<dt><a name="index-make_002dframebuffer"></a>Procedure: <strong>make-framebuffer</strong> <em><var>width</var> <var>height</var> [#:min-filter 'linear] [#:mag-filter 'linear] [#:wrap-s 'repeat] [#:wrap-t 'repeat]</em></dt>
+<dd>
+<p>Create a new framebuffer that is <var>width</var> pixels wide and <var>height</var> pixels high.
+</p>
+<p><var>min-filter</var> and <var>mag-filter</var> determine the scaling algorithm
+applied to the framebuffer when rendering.  By default, linear scaling
+is used in both cases. To perform no smoothing at all, use
+<code>nearest</code> for simple nearest neighbor scaling.  This is typically
+the best choice for pixel art games.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-framebuffer_003f"></a>Procedure: <strong>framebuffer?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is a framebuffer.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-framebuffer_002dtexture"></a>Procedure: <strong>framebuffer-texture</strong> <em><var>fb</var></em></dt>
+<dd><p>Return the texture backing the framebuffer <var>fb</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-framebuffer_002dviewport"></a>Procedure: <strong>framebuffer-viewport</strong> <em><var>fb</var></em></dt>
+<dd><p>Return the default viewport (see <a href="Viewports.html#Viewports">Viewports</a>) used by the
+framebuffer <var>fb</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-null_002dframebuffer"></a>Procedure: <strong>null-framebuffer</strong></dt>
+<dd><p>The default framebuffer.
+</p></dd></dl>
 
 
 
diff --git a/manuals/chickadee/GNU-Free-Documentation-License.html b/manuals/chickadee/GNU-Free-Documentation-License.html
index 62ad23f..3c9e2c5 100644
--- a/manuals/chickadee/GNU-Free-Documentation-License.html
+++ b/manuals/chickadee/GNU-Free-Documentation-License.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: GNU Free Documentation License</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>GNU Free Documentation License (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: GNU Free Documentation License">
-<meta name="keywords" content="The Chickadee Game Toolkit: GNU Free Documentation License">
+<meta name="description" content="GNU Free Documentation License (The Chickadee Game Toolkit)">
+<meta name="keywords" content="GNU Free Documentation License (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
@@ -106,7 +106,7 @@ Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.
 </pre></div>
 
-<ol>
+<ol start="0">
 <li> PREAMBLE
 
 <p>The purpose of this License is to make a manual, textbook, or other
@@ -282,7 +282,7 @@ Version filling the role of the Document, thus licensing distribution
 and modification of the Modified Version to whoever possesses a copy
 of it.  In addition, you must do these things in the Modified Version:
 </p>
-<ol>
+<ol type="A" start="1">
 <li> Use in the Title Page (and on the covers, if any) a title distinct
 from that of the Document, and from those of previous versions
 (which should, if there were any, be listed in the History section
diff --git a/manuals/chickadee/Graphics.html b/manuals/chickadee/Graphics.html
index 0afe5bc..f10cc89 100644
--- a/manuals/chickadee/Graphics.html
+++ b/manuals/chickadee/Graphics.html
@@ -16,22 +16,22 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Graphics</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Graphics (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Graphics">
-<meta name="keywords" content="The Chickadee Game Toolkit: Graphics">
+<meta name="description" content="Graphics (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Graphics (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
 <link href="API-Reference.html#API-Reference" rel="up" title="API Reference">
 <link href="Rendering-Engine.html#Rendering-Engine" rel="next" title="Rendering Engine">
-<link href="Rectangles.html#Rectangles" rel="prev" title="Rectangles">
+<link href="Path-Finding.html#Path-Finding" rel="prev" title="Path Finding">
 <style type="text/css">
 <!--
 a.summary-letter {text-decoration: none}
@@ -90,11 +90,11 @@ ul.no-bullet {list-style: none}
 <a name="Graphics"></a>
 <div class="header">
 <p>
-Next: <a href="Audio.html#Audio" accesskey="n" rel="next">Audio</a>, Previous: <a href="Math.html#Math" accesskey="p" rel="prev">Math</a>, Up: <a href="API-Reference.html#API-Reference" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+Next: <a href="Scripting.html#Scripting" accesskey="n" rel="next">Scripting</a>, Previous: <a href="Math.html#Math" accesskey="p" rel="prev">Math</a>, Up: <a href="API-Reference.html#API-Reference" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
 </div>
 <hr>
 <a name="Graphics-1"></a>
-<h3 class="section">2.4 Graphics</h3>
+<h3 class="section">2.3 Graphics</h3>
 
 <p>Chickadee aims to make hardware-accelerated graphics rendering as
 simple and efficient as possible by providing high-level APIs that
@@ -112,17 +112,19 @@ blocks to implement additional rendering techniques.
 </td></tr>
 <tr><td align="left" valign="top">&bull; <a href="Sprites.html#Sprites" accesskey="3">Sprites</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Draw 2D images.
 </td></tr>
-<tr><td align="left" valign="top">&bull; <a href="Lines-and-Shapes.html#Lines-and-Shapes" accesskey="4">Lines and Shapes</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Draw line segments and polygons.
+<tr><td align="left" valign="top">&bull; <a href="Tile-Maps.html#Tile-Maps" accesskey="4">Tile Maps</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Draw 2D tile maps.
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="Lines-and-Shapes.html#Lines-and-Shapes" accesskey="5">Lines and Shapes</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Draw line segments and polygons.
 </td></tr>
-<tr><td align="left" valign="top">&bull; <a href="Fonts.html#Fonts" accesskey="5">Fonts</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Drawing text.
+<tr><td align="left" valign="top">&bull; <a href="Fonts.html#Fonts" accesskey="6">Fonts</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Drawing text.
 </td></tr>
-<tr><td align="left" valign="top">&bull; <a href="Blending-and-Depth-Testing.html#Blending-and-Depth-Testing" accesskey="6">Blending and Depth Testing</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Control how pixels are combined.
+<tr><td align="left" valign="top">&bull; <a href="Blending-and-Depth-Testing.html#Blending-and-Depth-Testing" accesskey="7">Blending and Depth Testing</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Control how pixels are combined.
 </td></tr>
-<tr><td align="left" valign="top">&bull; <a href="Vertex-Arrays.html#Vertex-Arrays" accesskey="7">Vertex Arrays</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Create 2D/3D models.
+<tr><td align="left" valign="top">&bull; <a href="Vertex-Arrays.html#Vertex-Arrays" accesskey="8">Vertex Arrays</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Create 2D/3D models.
 </td></tr>
-<tr><td align="left" valign="top">&bull; <a href="Shaders.html#Shaders" accesskey="8">Shaders</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Create custom GPU programs.
+<tr><td align="left" valign="top">&bull; <a href="Shaders.html#Shaders" accesskey="9">Shaders</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Create custom GPU programs.
 </td></tr>
-<tr><td align="left" valign="top">&bull; <a href="Framebuffers.html#Framebuffers" accesskey="9">Framebuffers</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Render to texture.
+<tr><td align="left" valign="top">&bull; <a href="Framebuffers.html#Framebuffers">Framebuffers</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Render to texture.
 </td></tr>
 <tr><td align="left" valign="top">&bull; <a href="Viewports.html#Viewports">Viewports</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Restrict rendering to
 </td></tr>
diff --git a/manuals/chickadee/Grid.html b/manuals/chickadee/Grid.html
new file mode 100644
index 0000000..f6e1cbf
--- /dev/null
+++ b/manuals/chickadee/Grid.html
@@ -0,0 +1,223 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- Copyright (C) 2017  David Thompson davet@gnu.org
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled "GNU
+Free Documentation License".
+
+A copy of the license is also available from the Free Software
+Foundation Web site at http://www.gnu.org/licenses/fdl.html.
+
+
+The document was typeset with
+http://www.texinfo.org/ (GNU Texinfo).
+ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Grid (The Chickadee Game Toolkit)</title>
+
+<meta name="description" content="Grid (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Grid (The Chickadee Game Toolkit)">
+<meta name="resource-type" content="document">
+<meta name="distribution" content="global">
+<meta name="Generator" content="makeinfo">
+<link href="index.html#Top" rel="start" title="Top">
+<link href="Index.html#Index" rel="index" title="Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Math.html#Math" rel="up" title="Math">
+<link href="Matrices.html#Matrices" rel="next" title="Matrices">
+<link href="Rectangles.html#Rectangles" rel="prev" title="Rectangles">
+<style type="text/css">
+<!--
+a.summary-letter {text-decoration: none}
+blockquote.indentedblock {margin-right: 0em}
+blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
+blockquote.smallquotation {font-size: smaller}
+div.display {margin-left: 3.2em}
+div.example {margin-left: 3.2em}
+div.lisp {margin-left: 3.2em}
+div.smalldisplay {margin-left: 3.2em}
+div.smallexample {margin-left: 3.2em}
+div.smalllisp {margin-left: 3.2em}
+kbd {font-style: oblique}
+pre.display {font-family: inherit}
+pre.format {font-family: inherit}
+pre.menu-comment {font-family: serif}
+pre.menu-preformatted {font-family: serif}
+pre.smalldisplay {font-family: inherit; font-size: smaller}
+pre.smallexample {font-size: smaller}
+pre.smallformat {font-family: inherit; font-size: smaller}
+pre.smalllisp {font-size: smaller}
+span.nolinebreak {white-space: nowrap}
+span.roman {font-family: initial; font-weight: normal}
+span.sansserif {font-family: sans-serif; font-weight: normal}
+ul.no-bullet {list-style: none}
+@media (min-width: 1140px) {
+    body {
+        margin-left: 14rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (min-width: 800px) and (max-width: 1140px) {
+    body {
+        margin-left: 6rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (max-width: 800px) {
+    body {
+        margin: 1rem;
+    }
+}
+
+-->
+</style>
+<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
+
+
+</head>
+
+<body lang="en">
+<a name="Grid"></a>
+<div class="header">
+<p>
+Next: <a href="Matrices.html#Matrices" accesskey="n" rel="next">Matrices</a>, Previous: <a href="Rectangles.html#Rectangles" accesskey="p" rel="prev">Rectangles</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Grid-1"></a>
+<h4 class="subsection">2.2.4 Grid</h4>
+
+<p>The <code>(chickadee math grid)</code> module provides a simple spatial
+partitioning system for axis-aligned bounding boxes
+(see <a href="Rectangles.html#Rectangles">Rectangles</a>) in 2D space.  The grid divides the world into
+tiles and keeps track of which rectangles occupy which tiles.  When
+there are lots of moving objects in the game world that need collision
+detection, the grid greatly speeds up the process.  Instead of
+checking collisions of each object against every other object (an
+O(n^2) operation), the grid quickly narrows down which objects could
+possibly be colliding and only performs collision testing against a
+small set of objects.
+</p>
+<p>In addition to checking for collisions, the grid also handles the
+resolution of collisions.  Exactly how each collision is resolved is
+user-defined.  A player bumping into a wall may slide against it.  An
+enemy colliding with a projectile shot by the player may get pushed
+back in the opposite direction.  Two players colliding may not need
+resolution at all and will just pass through each other.  The way this
+works is that each time an object (A) is moved within the grid, the
+grid looks for an object (B) that may possibly be colliding with A.  A
+user-defined procedure known as a &ldquo;filter&rdquo; is then called with both
+A and B.  If the filter returns <code>#f</code>, it means that even if A and
+B are colliding, no collision resolution is needed.  In this case the
+grid won&rsquo;t waste time checking if they really do collide because it
+doesn&rsquo;t matter.  If A and B are collidable, then the filter returns a
+procedure that implements the resolution technique.  The grid will
+then perform a collision test.  If A and B are colliding, the resolver
+procedure is called.  It&rsquo;s the resolvers job to adjust the objects
+such that they are no longer colliding.  The grid module comes with a
+very simple resolution procedure, <code>slide</code>, that adjusts object A
+by the smallest amount so that it no longer overlaps with B.  By using
+this filtering technique, a game can resolve collisions between
+different objects in different ways.
+</p>
+<dl>
+<dt><a name="index-make_002dgrid"></a>Procedure: <strong>make-grid</strong> <em>[<var>cell-size</var> 64]</em></dt>
+<dd><p>Return a new grid partitioned into <var>cell-size</var> tiles.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-grid_003f"></a>Procedure: <strong>grid?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is a grid.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-cell_003f"></a>Procedure: <strong>cell?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is a grid cell.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-cell_002dcount"></a>Procedure: <strong>cell-count</strong> <em><var>cell</var></em></dt>
+<dd><p>Return the number of items in <var>cell</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-grid_002dcell_002dsize"></a>Procedure: <strong>grid-cell-size</strong> <em><var>grid</var></em></dt>
+<dd><p>Return the cell size of <var>grid</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-grid_002dcell_002dcount"></a>Procedure: <strong>grid-cell-count</strong> <em><var>grid</var></em></dt>
+<dd><p>Return the number of cells currently in <var>grid</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-grid_002ditem_002dcount"></a>Procedure: <strong>grid-item-count</strong> <em><var>grid</var></em></dt>
+<dd><p>Return the number of items in <var>grid</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-grid_002dadd"></a>Procedure: <strong>grid-add</strong> <em><var>grid</var> <var>item</var> <var>x</var> <var>y</var>                             <var>width</var> <var>height</var></em></dt>
+<dd>
+<p>Add <var>item</var> to <var>grid</var> represented by the axis-aligned bounding
+box whose lower-left corner is at (<var>x</var>, <var>y</var>) and is
+<var>width</var> x <var>height</var> in size.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-grid_002dremove"></a>Procedure: <strong>grid-remove</strong> <em><var>grid</var> <var>item</var></em></dt>
+<dd><p>Return <var>item</var> from <var>grid</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-grid_002dclear"></a>Procedure: <strong>grid-clear</strong> <em><var>grid</var></em></dt>
+<dd><p>Remove all items from <var>grid</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-grid_002dmove"></a>Procedure: <strong>grid-move</strong> <em><var>grid</var> <var>item</var> <var>position</var> <var>filter</var></em></dt>
+<dd><p>Attempt to move <var>item</var> in <var>grid</var> to <var>position</var> (a 2D
+vector) and check for collisions.  For each collision, <var>filter</var>
+will be called with two arguments: <var>item</var> and the item it collided
+with.  If a collision occurs, <var>position</var> may be modified to
+resolve the colliding objects.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-for_002deach_002dcell"></a>Procedure: <strong>for-each-cell</strong> <em><var>proc</var> <var>grid</var> [<var>rect</var>]</em></dt>
+<dd><p>Call <var>proc</var> with each cell in <var>grid</var> that intersects
+<var>rect</var>, or every cell if <var>rect</var> is <code>#f</code>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-for_002deach_002ditem"></a>Procedure: <strong>for-each-item</strong> <em><var>proc</var> <var>grid</var></em></dt>
+<dd><p>Call <var>proc</var> for each item in <var>grid</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-slide"></a>Procedure: <strong>slide</strong> <em><var>item</var> <var>item-rect</var>                          <var>other</var> <var>other-rect</var> <var>goal</var></em></dt>
+<dd>
+<p>Resolve the collision that occurs between <var>item</var> and <var>other</var>
+when moving <var>item-rect</var> to <var>goal</var> by sliding <var>item-rect</var>
+the minimum amount needed to make it no longer overlap
+<var>other-rect</var>.
+</p></dd></dl>
+
+<hr>
+<div class="header">
+<p>
+Next: <a href="Matrices.html#Matrices" accesskey="n" rel="next">Matrices</a>, Previous: <a href="Rectangles.html#Rectangles" accesskey="p" rel="prev">Rectangles</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+
+
+
+</body>
+</html>
diff --git a/manuals/chickadee/Index.html b/manuals/chickadee/Index.html
index 3c1df5e..b5168e5 100644
--- a/manuals/chickadee/Index.html
+++ b/manuals/chickadee/Index.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Index</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Index (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Index">
-<meta name="keywords" content="The Chickadee Game Toolkit: Index">
+<meta name="description" content="Index (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Index (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
@@ -103,16 +103,20 @@ Previous: <a href="Copying-This-Manual.html#Copying-This-Manual" accesskey="p" r
  &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-D"><b>D</b></a>
  &nbsp; 
+<a class="summary-letter" href="#Index_fn_letter-E"><b>E</b></a>
+ &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-F"><b>F</b></a>
  &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-G"><b>G</b></a>
  &nbsp; 
-<a class="summary-letter" href="#Index_fn_letter-K"><b>K</b></a>
- &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-L"><b>L</b></a>
  &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-M"><b>M</b></a>
  &nbsp; 
+<a class="summary-letter" href="#Index_fn_letter-N"><b>N</b></a>
+ &nbsp; 
+<a class="summary-letter" href="#Index_fn_letter-O"><b>O</b></a>
+ &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-P"><b>P</b></a>
  &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-Q"><b>Q</b></a>
@@ -125,25 +129,45 @@ Previous: <a href="Copying-This-Manual.html#Copying-This-Manual" accesskey="p" r
  &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-U"><b>U</b></a>
  &nbsp; 
+<a class="summary-letter" href="#Index_fn_letter-V"><b>V</b></a>
+ &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-W"><b>W</b></a>
  &nbsp; 
+<a class="summary-letter" href="#Index_fn_letter-Y"><b>Y</b></a>
+ &nbsp; 
 </td></tr></table>
 <table class="index-fn" border="0">
 <tr><td></td><th align="left">Index Entry</th><td>&nbsp;</td><th align="left"> Section</th></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-A">A</a></th><td></td><td></td></tr>
+<tr><td></td><td valign="top"><a href="Path-Finding.html#index-a_002a"><code>a*</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Path-Finding.html#Path-Finding">Path Finding</a></td></tr>
 <tr><td></td><td valign="top"><a href="Kernel.html#index-abort_002dgame"><code>abort-game</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-after_002ddraw_002dhook"><code>after-draw-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-after"><code>after</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-agenda_002dtime"><code>agenda-time</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-agenda_003f"><code>agenda?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-at"><code>at</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-B">B</a></th><td></td><td></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-before_002ddraw_002dhook"><code>before-draw-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
+<tr><td></td><td valign="top"><a href="Bezier-Curves.html#index-bezier_002dcurve_002dp0"><code>bezier-curve-p0</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Bezier-Curves.html#Bezier-Curves">Bezier Curves</a></td></tr>
+<tr><td></td><td valign="top"><a href="Bezier-Curves.html#index-bezier_002dcurve_002dp1"><code>bezier-curve-p1</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Bezier-Curves.html#Bezier-Curves">Bezier Curves</a></td></tr>
+<tr><td></td><td valign="top"><a href="Bezier-Curves.html#index-bezier_002dcurve_002dp2"><code>bezier-curve-p2</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Bezier-Curves.html#Bezier-Curves">Bezier Curves</a></td></tr>
+<tr><td></td><td valign="top"><a href="Bezier-Curves.html#index-bezier_002dcurve_002dp3"><code>bezier-curve-p3</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Bezier-Curves.html#Bezier-Curves">Bezier Curves</a></td></tr>
+<tr><td></td><td valign="top"><a href="Bezier-Curves.html#index-bezier_002dcurve_002dpoint_002dat"><code>bezier-curve-point-at</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Bezier-Curves.html#Bezier-Curves">Bezier Curves</a></td></tr>
+<tr><td></td><td valign="top"><a href="Bezier-Curves.html#index-bezier_002dcurve_002dpoint_002dat_0021"><code>bezier-curve-point-at!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Bezier-Curves.html#Bezier-Curves">Bezier Curves</a></td></tr>
+<tr><td></td><td valign="top"><a href="Bezier-Curves.html#index-bezier_002dcurve_003f"><code>bezier-curve?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Bezier-Curves.html#Bezier-Curves">Bezier Curves</a></td></tr>
+<tr><td></td><td valign="top"><a href="Bezier-Curves.html#index-bezier_002dpath"><code>bezier-path</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Bezier-Curves.html#Bezier-Curves">Bezier Curves</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-C">C</a></th><td></td><td></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-controller_002dadd_002dhook"><code>controller-add-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-controller_002dmove_002dhook"><code>controller-move-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-controller_002dpress_002dhook"><code>controller-press-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-controller_002drelease_002dhook"><code>controller-release-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-controller_002dremove_002dhook"><code>controller-remove-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
+<tr><td></td><td valign="top"><a href="Scripts.html#index-cancel_002dscript"><code>cancel-script</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Scripts.html#Scripts">Scripts</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-cell_002dcount"><code>cell-count</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-cell_003f"><code>cell?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Scripts.html#index-channel_002dget"><code>channel-get</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Scripts.html#Scripts">Scripts</a></td></tr>
+<tr><td></td><td valign="top"><a href="Channels.html#index-channel_002dget-1"><code>channel-get</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Channels.html#Channels">Channels</a></td></tr>
+<tr><td></td><td valign="top"><a href="Channels.html#index-channel_002dput"><code>channel-put</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Channels.html#Channels">Channels</a></td></tr>
+<tr><td></td><td valign="top"><a href="Channels.html#index-channel_003f"><code>channel?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Channels.html#Channels">Channels</a></td></tr>
+<tr><td></td><td valign="top"><a href="Basics.html#index-cotan"><code>cotan</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Basics.html#Basics">Basics</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-current_002dagenda"><code>current-agenda</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-current_002dagenda-1"><code>current-agenda</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
 <tr><td></td><td valign="top"><a href="Rendering-Engine.html#index-current_002dblend_002dmode"><code>current-blend-mode</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rendering-Engine.html#Rendering-Engine">Rendering Engine</a></td></tr>
 <tr><td></td><td valign="top"><a href="Rendering-Engine.html#index-current_002ddepth_002dtest"><code>current-depth-test</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rendering-Engine.html#Rendering-Engine">Rendering Engine</a></td></tr>
 <tr><td></td><td valign="top"><a href="Rendering-Engine.html#index-current_002dframebuffer"><code>current-framebuffer</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rendering-Engine.html#Rendering-Engine">Rendering Engine</a></td></tr>
@@ -152,11 +176,32 @@ Previous: <a href="Copying-This-Manual.html#Copying-This-Manual" accesskey="p" r
 <tr><td></td><td valign="top"><a href="Rendering-Engine.html#index-current_002dviewport"><code>current-viewport</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rendering-Engine.html#Rendering-Engine">Rendering Engine</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-D">D</a></th><td></td><td></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-draw_002dhook"><code>draw-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
+<tr><td></td><td valign="top"><a href="Lines-and-Shapes.html#index-draw_002dbezier_002dcurve"><code>draw-bezier-curve</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Lines-and-Shapes.html#Lines-and-Shapes">Lines and Shapes</a></td></tr>
+<tr><td></td><td valign="top"><a href="Lines-and-Shapes.html#index-draw_002dbezier_002dpath"><code>draw-bezier-path</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Lines-and-Shapes.html#Lines-and-Shapes">Lines and Shapes</a></td></tr>
 <tr><td></td><td valign="top"><a href="Lines-and-Shapes.html#index-draw_002dline"><code>draw-line</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Lines-and-Shapes.html#Lines-and-Shapes">Lines and Shapes</a></td></tr>
 <tr><td></td><td valign="top"><a href="Sprites.html#index-draw_002dnine_002dpatch"><code>draw-nine-patch</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Sprites.html#Sprites">Sprites</a></td></tr>
 <tr><td></td><td valign="top"><a href="Sprites.html#index-draw_002dsprite"><code>draw-sprite</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Sprites.html#Sprites">Sprites</a></td></tr>
 <tr><td></td><td valign="top"><a href="Fonts.html#index-draw_002dtext"><code>draw-text</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Fonts.html#Fonts">Fonts</a></td></tr>
+<tr><td></td><td valign="top"><a href="Tile-Maps.html#index-draw_002dtile_002dmap"><code>draw-tile-map</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Tile-Maps.html#Tile-Maps">Tile Maps</a></td></tr>
+<tr><td colspan="4"> <hr></td></tr>
+<tr><th><a name="Index_fn_letter-E">E</a></th><td></td><td></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002din_002dcubic"><code>ease-in-cubic</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002din_002dout_002dcubic"><code>ease-in-out-cubic</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002din_002dout_002dquad"><code>ease-in-out-quad</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002din_002dout_002dquart"><code>ease-in-out-quart</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002din_002dout_002dquint"><code>ease-in-out-quint</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002din_002dout_002dsine"><code>ease-in-out-sine</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002din_002dquad"><code>ease-in-quad</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002din_002dquart"><code>ease-in-quart</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002din_002dquint"><code>ease-in-quint</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002din_002dsine"><code>ease-in-sine</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002dout_002dcubic"><code>ease-out-cubic</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002dout_002dquad"><code>ease-out-quad</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002dout_002dquart"><code>ease-out-quart</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002dout_002dquint"><code>ease-out-quint</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-ease_002dout_002dsine"><code>ease-out-sine</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-every"><code>every</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-every-1"><code>every</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-F">F</a></th><td></td><td></td></tr>
 <tr><td></td><td valign="top"><a href="Fonts.html#index-font_002dbold_003f"><code>font-bold?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Fonts.html#Fonts">Fonts</a></td></tr>
@@ -165,56 +210,182 @@ Previous: <a href="Copying-This-Manual.html#Copying-This-Manual" accesskey="p" r
 <tr><td></td><td valign="top"><a href="Fonts.html#index-font_002dline_002dheight"><code>font-line-height</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Fonts.html#Fonts">Fonts</a></td></tr>
 <tr><td></td><td valign="top"><a href="Fonts.html#index-font_002dline_002dheight-1"><code>font-line-height</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Fonts.html#Fonts">Fonts</a></td></tr>
 <tr><td></td><td valign="top"><a href="Fonts.html#index-font_003f"><code>font?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Fonts.html#Fonts">Fonts</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-for_002deach_002dcell"><code>for-each-cell</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-for_002deach_002ditem"><code>for-each-item</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Scripts.html#index-forever"><code>forever</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Scripts.html#Scripts">Scripts</a></td></tr>
+<tr><td></td><td valign="top"><a href="Framebuffers.html#index-framebuffer_002dtexture"><code>framebuffer-texture</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Framebuffers.html#Framebuffers">Framebuffers</a></td></tr>
+<tr><td></td><td valign="top"><a href="Framebuffers.html#index-framebuffer_002dviewport"><code>framebuffer-viewport</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Framebuffers.html#Framebuffers">Framebuffers</a></td></tr>
+<tr><td></td><td valign="top"><a href="Framebuffers.html#index-framebuffer_003f"><code>framebuffer?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Framebuffers.html#Framebuffers">Framebuffers</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-G">G</a></th><td></td><td></td></tr>
 <tr><td></td><td valign="top"><a href="Rendering-Engine.html#index-gpu_002dapply"><code>gpu-apply</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rendering-Engine.html#Rendering-Engine">Rendering Engine</a></td></tr>
 <tr><td></td><td valign="top"><a href="Rendering-Engine.html#index-gpu_002dapply_002a"><code>gpu-apply*</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rendering-Engine.html#Rendering-Engine">Rendering Engine</a></td></tr>
-<tr><td colspan="4"> <hr></td></tr>
-<tr><th><a name="Index_fn_letter-K">K</a></th><td></td><td></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-key_002dpress_002dhook"><code>key-press-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-key_002drelease_002dhook"><code>key-release-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-grid_002dadd"><code>grid-add</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-grid_002dcell_002dcount"><code>grid-cell-count</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-grid_002dcell_002dsize"><code>grid-cell-size</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-grid_002dclear"><code>grid-clear</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-grid_002ditem_002dcount"><code>grid-item-count</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-grid_002dmove"><code>grid-move</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-grid_002dremove"><code>grid-remove</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-grid_003f"><code>grid?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-L">L</a></th><td></td><td></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-linear"><code>linear</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
 <tr><td></td><td valign="top"><a href="Fonts.html#index-load_002dfont"><code>load-font</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Fonts.html#Fonts">Fonts</a></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-load_002dhook"><code>load-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
 <tr><td></td><td valign="top"><a href="Textures.html#index-load_002dimage"><code>load-image</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Textures.html#Textures">Textures</a></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-load_002dmusic"><code>load-music</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-load_002dsample"><code>load-sample</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
+<tr><td></td><td valign="top"><a href="Tile-Maps.html#index-load_002dtile_002dmap"><code>load-tile-map</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Tile-Maps.html#Tile-Maps">Tile Maps</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-M">M</a></th><td></td><td></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-mouse_002dmove_002dhook"><code>mouse-move-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-mouse_002dpress_002dhook"><code>mouse-press-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-mouse_002drelease_002dhook"><code>mouse-release-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-music_002dpaused_003f"><code>music-paused?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-music_002dplaying_003f"><code>music-playing?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-music_002dvolume"><code>music-volume</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-make_002dagenda"><code>make-agenda</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
+<tr><td></td><td valign="top"><a href="Bezier-Curves.html#index-make_002dbezier_002dcurve"><code>make-bezier-curve</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Bezier-Curves.html#Bezier-Curves">Bezier Curves</a></td></tr>
+<tr><td></td><td valign="top"><a href="Channels.html#index-make_002dchannel"><code>make-channel</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Channels.html#Channels">Channels</a></td></tr>
+<tr><td></td><td valign="top"><a href="Framebuffers.html#index-make_002dframebuffer"><code>make-framebuffer</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Framebuffers.html#Framebuffers">Framebuffers</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-make_002dgrid"><code>make-grid</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-make_002didentity_002dmatrix4"><code>make-identity-matrix4</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Quaternions.html#index-make_002didentity_002dquaternion"><code>make-identity-quaternion</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Quaternions.html#Quaternions">Quaternions</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-make_002dmatrix4"><code>make-matrix4</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-make_002dnull_002dmatrix4"><code>make-null-matrix4</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Path-Finding.html#index-make_002dpath_002dfinder"><code>make-path-finder</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Path-Finding.html#Path-Finding">Path Finding</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-make_002drect"><code>make-rect</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_002a"><code>matrix4*</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_002d2d_002dtransform_0021"><code>matrix4-2d-transform!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_002didentity_0021"><code>matrix4-identity!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_002dmult_0021"><code>matrix4-mult!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_002drotate"><code>matrix4-rotate</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_002drotate_0021"><code>matrix4-rotate!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_002drotate_002dz"><code>matrix4-rotate-z</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_002drotate_002dz_0021"><code>matrix4-rotate-z!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_002dscale"><code>matrix4-scale</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_002dscale_0021"><code>matrix4-scale!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_002dtranslate"><code>matrix4-translate</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_002dtranslate_0021"><code>matrix4-translate!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-matrix4_003f"><code>matrix4?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td colspan="4"> <hr></td></tr>
+<tr><th><a name="Index_fn_letter-N">N</a></th><td></td><td></td></tr>
+<tr><td></td><td valign="top"><a href="Framebuffers.html#index-null_002dframebuffer"><code>null-framebuffer</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Framebuffers.html#Framebuffers">Framebuffers</a></td></tr>
+<tr><td colspan="4"> <hr></td></tr>
+<tr><th><a name="Index_fn_letter-O">O</a></th><td></td><td></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-orthographic_002dprojection"><code>orthographic-projection</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-P">P</a></th><td></td><td></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-pause_002dmusic"><code>pause-music</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-play_002dmusic"><code>play-music</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-play_002dsample"><code>play-sample</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
+<tr><td></td><td valign="top"><a href="Path-Finding.html#index-path_002dfinder_003f"><code>path-finder?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Path-Finding.html#Path-Finding">Path Finding</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-perspective_002dprojection"><code>perspective-projection</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Basics.html#index-pi"><code>pi</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Basics.html#Basics">Basics</a></td></tr>
+<tr><td></td><td valign="top"><a href="Basics.html#index-pi_002f2"><code>pi/2</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Basics.html#Basics">Basics</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-Q">Q</a></th><td></td><td></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-quit_002dhook"><code>quit-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
+<tr><td></td><td valign="top"><a href="Quaternions.html#index-quaternion"><code>quaternion</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Quaternions.html#Quaternions">Quaternions</a></td></tr>
+<tr><td></td><td valign="top"><a href="Quaternions.html#index-quaternion_002dw"><code>quaternion-w</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Quaternions.html#Quaternions">Quaternions</a></td></tr>
+<tr><td></td><td valign="top"><a href="Quaternions.html#index-quaternion_002dx"><code>quaternion-x</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Quaternions.html#Quaternions">Quaternions</a></td></tr>
+<tr><td></td><td valign="top"><a href="Quaternions.html#index-quaternion_002dy"><code>quaternion-y</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Quaternions.html#Quaternions">Quaternions</a></td></tr>
+<tr><td></td><td valign="top"><a href="Quaternions.html#index-quaternion_002dz"><code>quaternion-z</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Quaternions.html#Quaternions">Quaternions</a></td></tr>
+<tr><td></td><td valign="top"><a href="Quaternions.html#index-quaternion_003f"><code>quaternion?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Quaternions.html#Quaternions">Quaternions</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-R">R</a></th><td></td><td></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-resume_002dmusic"><code>resume-music</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-rewind_002dmusic"><code>rewind-music</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002darea"><code>rect-area</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dbottom"><code>rect-bottom</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dcenter_002dx"><code>rect-center-x</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dcenter_002dy"><code>rect-center-y</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dclamp"><code>rect-clamp</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dclamp_0021"><code>rect-clamp!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dclamp_002dx"><code>rect-clamp-x</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dclamp_002dy"><code>rect-clamp-y</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dclip"><code>rect-clip</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dclip_0021"><code>rect-clip!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dcontains_002dvec2_003f"><code>rect-contains-vec2?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dcontains_003f"><code>rect-contains?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dheight"><code>rect-height</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dinflate"><code>rect-inflate</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dinflate_0021"><code>rect-inflate!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dintersects_003f"><code>rect-intersects?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dleft"><code>rect-left</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dmove"><code>rect-move</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dmove_0021"><code>rect-move!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dmove_002dby"><code>rect-move-by</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dmove_002dby_0021"><code>rect-move-by!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dmove_002dby_002dvec2"><code>rect-move-by-vec2</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dmove_002dby_002dvec2_0021"><code>rect-move-by-vec2!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dmove_002dvec2"><code>rect-move-vec2</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dmove_002dvec2_0021"><code>rect-move-vec2!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dright"><code>rect-right</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dtop"><code>rect-top</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dunion"><code>rect-union</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dunion_0021"><code>rect-union!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dwidth"><code>rect-width</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dwithin_003f"><code>rect-within?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dx"><code>rect-x</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_002dy"><code>rect-y</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-rect_003f"><code>rect?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
 <tr><td></td><td valign="top"><a href="Kernel.html#index-run_002dgame"><code>run-game</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
+<tr><td></td><td valign="top"><a href="Kernel.html#index-run_002dgame_002fsdl"><code>run-game/sdl</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-S">S</a></th><td></td><td></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-set_002dmusic_002dvolume_0021"><code>set-music-volume!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-set_002dsample_002dvolume_0021"><code>set-sample-volume!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
-<tr><td></td><td valign="top"><a href="Audio.html#index-stop_002dmusic"><code>stop-music</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Audio.html#Audio">Audio</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-schedule_002dafter"><code>schedule-after</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-schedule_002dat"><code>schedule-at</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-schedule_002devery"><code>schedule-every</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
+<tr><td></td><td valign="top"><a href="Scripts.html#index-script"><code>script</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Scripts.html#Scripts">Scripts</a></td></tr>
+<tr><td></td><td valign="top"><a href="Scripts.html#index-script_002dcancelled_003f"><code>script-cancelled?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Scripts.html#Scripts">Scripts</a></td></tr>
+<tr><td></td><td valign="top"><a href="Scripts.html#index-script_002dcomplete_003f"><code>script-complete?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Scripts.html#Scripts">Scripts</a></td></tr>
+<tr><td></td><td valign="top"><a href="Scripts.html#index-script_002drunning_003f"><code>script-running?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Scripts.html#Scripts">Scripts</a></td></tr>
+<tr><td></td><td valign="top"><a href="Scripts.html#index-script_003f"><code>script?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Scripts.html#Scripts">Scripts</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-set_002drect_002dheight_0021"><code>set-rect-height!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-set_002drect_002dwidth_0021"><code>set-rect-width!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-set_002drect_002dx_0021"><code>set-rect-x!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-set_002drect_002dy_0021"><code>set-rect-y!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-set_002dvec2_002dx_0021"><code>set-vec2-x!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-set_002dvec2_002dy_0021"><code>set-vec2-y!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-set_002dvec3_002dx_0021"><code>set-vec3-x!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-set_002dvec3_002dy_0021"><code>set-vec3-y!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-set_002dvec3_002dz_0021"><code>set-vec3-z!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Scripts.html#index-sleep"><code>sleep</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Scripts.html#Scripts">Scripts</a></td></tr>
+<tr><td></td><td valign="top"><a href="Grid.html#index-slide"><code>slide</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Grid.html#Grid">Grid</a></td></tr>
+<tr><td></td><td valign="top"><a href="Easings.html#index-smoothstep"><code>smoothstep</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Easings.html#Easings">Easings</a></td></tr>
+<tr><td></td><td valign="top"><a href="Scripts.html#index-spawn_002dscript"><code>spawn-script</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Scripts.html#Scripts">Scripts</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-T">T</a></th><td></td><td></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-text_002dinput_002dhook"><code>text-input-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-time"><code>time</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
+<tr><td></td><td valign="top"><a href="Matrices.html#index-transform_0021"><code>transform!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Matrices.html#Matrices">Matrices</a></td></tr>
+<tr><td></td><td valign="top"><a href="Tweening.html#index-tween"><code>tween</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Tweening.html#Tweening">Tweening</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-U">U</a></th><td></td><td></td></tr>
-<tr><td></td><td valign="top"><a href="Kernel.html#index-update_002dhook"><code>update-hook</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Kernel.html#Kernel">Kernel</a></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-update_002dagenda"><code>update-agenda</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
+<tr><td colspan="4"> <hr></td></tr>
+<tr><th><a name="Index_fn_letter-V">V</a></th><td></td><td></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2"><code>vec2</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002a"><code>vec2*</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002b"><code>vec2+</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002d"><code>vec2-</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002dadd_0021"><code>vec2-add!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Rectangles.html#index-vec2_002dclamp_002dto_002drect_0021"><code>vec2-clamp-to-rect!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rectangles.html#Rectangles">Rectangles</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002dcopy"><code>vec2-copy</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002dcopy_0021"><code>vec2-copy!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002ddot_002dproduct"><code>vec2-dot-product</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002dmagnitude"><code>vec2-magnitude</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002dmult_0021"><code>vec2-mult!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002dnormalize"><code>vec2-normalize</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002dsub_0021"><code>vec2-sub!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002dx"><code>vec2-x</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002dy"><code>vec2-y</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_002fpolar"><code>vec2/polar</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec2_003f"><code>vec2?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3"><code>vec3</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002a"><code>vec3*</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002b"><code>vec3+</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002d"><code>vec3-</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002dadd_0021"><code>vec3-add!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002dcopy"><code>vec3-copy</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002dcopy_0021"><code>vec3-copy!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002ddot_002dproduct"><code>vec3-dot-product</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002dmagnitude"><code>vec3-magnitude</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002dmult_0021"><code>vec3-mult!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002dnormalize"><code>vec3-normalize</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002dsub_0021"><code>vec3-sub!</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002dx"><code>vec3-x</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002dy"><code>vec3-y</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_002dz"><code>vec3-z</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
+<tr><td></td><td valign="top"><a href="Vectors.html#index-vec3_003f"><code>vec3?</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Vectors.html#Vectors">Vectors</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
 <tr><th><a name="Index_fn_letter-W">W</a></th><td></td><td></td></tr>
+<tr><td></td><td valign="top"><a href="Agendas.html#index-with_002dagenda"><code>with-agenda</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Agendas.html#Agendas">Agendas</a></td></tr>
 <tr><td></td><td valign="top"><a href="Sprites.html#index-with_002dbatched_002dsprites"><code>with-batched-sprites</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Sprites.html#Sprites">Sprites</a></td></tr>
 <tr><td></td><td valign="top"><a href="Rendering-Engine.html#index-with_002dblend_002dmode"><code>with-blend-mode</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rendering-Engine.html#Rendering-Engine">Rendering Engine</a></td></tr>
 <tr><td></td><td valign="top"><a href="Rendering-Engine.html#index-with_002ddepth_002dtest"><code>with-depth-test</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rendering-Engine.html#Rendering-Engine">Rendering Engine</a></td></tr>
@@ -223,6 +394,9 @@ Previous: <a href="Copying-This-Manual.html#Copying-This-Manual" accesskey="p" r
 <tr><td></td><td valign="top"><a href="Rendering-Engine.html#index-with_002dtexture"><code>with-texture</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rendering-Engine.html#Rendering-Engine">Rendering Engine</a></td></tr>
 <tr><td></td><td valign="top"><a href="Rendering-Engine.html#index-with_002dviewport"><code>with-viewport</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Rendering-Engine.html#Rendering-Engine">Rendering Engine</a></td></tr>
 <tr><td colspan="4"> <hr></td></tr>
+<tr><th><a name="Index_fn_letter-Y">Y</a></th><td></td><td></td></tr>
+<tr><td></td><td valign="top"><a href="Scripts.html#index-yield"><code>yield</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="Scripts.html#Scripts">Scripts</a></td></tr>
+<tr><td colspan="4"> <hr></td></tr>
 </table>
 <table><tr><th valign="top">Jump to: &nbsp; </th><td><a class="summary-letter" href="#Index_fn_letter-A"><b>A</b></a>
  &nbsp; 
@@ -232,16 +406,20 @@ Previous: <a href="Copying-This-Manual.html#Copying-This-Manual" accesskey="p" r
  &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-D"><b>D</b></a>
  &nbsp; 
+<a class="summary-letter" href="#Index_fn_letter-E"><b>E</b></a>
+ &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-F"><b>F</b></a>
  &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-G"><b>G</b></a>
  &nbsp; 
-<a class="summary-letter" href="#Index_fn_letter-K"><b>K</b></a>
- &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-L"><b>L</b></a>
  &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-M"><b>M</b></a>
  &nbsp; 
+<a class="summary-letter" href="#Index_fn_letter-N"><b>N</b></a>
+ &nbsp; 
+<a class="summary-letter" href="#Index_fn_letter-O"><b>O</b></a>
+ &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-P"><b>P</b></a>
  &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-Q"><b>Q</b></a>
@@ -254,8 +432,12 @@ Previous: <a href="Copying-This-Manual.html#Copying-This-Manual" accesskey="p" r
  &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-U"><b>U</b></a>
  &nbsp; 
+<a class="summary-letter" href="#Index_fn_letter-V"><b>V</b></a>
+ &nbsp; 
 <a class="summary-letter" href="#Index_fn_letter-W"><b>W</b></a>
  &nbsp; 
+<a class="summary-letter" href="#Index_fn_letter-Y"><b>Y</b></a>
+ &nbsp; 
 </td></tr></table>
 
 <hr>
diff --git a/manuals/chickadee/Installation.html b/manuals/chickadee/Installation.html
index a362263..4872008 100644
--- a/manuals/chickadee/Installation.html
+++ b/manuals/chickadee/Installation.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Installation</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Installation (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Installation">
-<meta name="keywords" content="The Chickadee Game Toolkit: Installation">
+<meta name="description" content="Installation (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Installation (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
diff --git a/manuals/chickadee/Kernel.html b/manuals/chickadee/Kernel.html
index 589c71e..c298723 100644
--- a/manuals/chickadee/Kernel.html
+++ b/manuals/chickadee/Kernel.html
@@ -16,21 +16,21 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Kernel</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Kernel (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Kernel">
-<meta name="keywords" content="The Chickadee Game Toolkit: Kernel">
+<meta name="description" content="Kernel (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Kernel (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
 <link href="API-Reference.html#API-Reference" rel="up" title="API Reference">
-<link href="Input.html#Input" rel="next" title="Input">
+<link href="Math.html#Math" rel="next" title="Math">
 <link href="API-Reference.html#API-Reference" rel="prev" title="API Reference">
 <style type="text/css">
 <!--
@@ -90,150 +90,118 @@ ul.no-bullet {list-style: none}
 <a name="Kernel"></a>
 <div class="header">
 <p>
-Next: <a href="Input.html#Input" accesskey="n" rel="next">Input</a>, Up: <a href="API-Reference.html#API-Reference" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+Next: <a href="Math.html#Math" accesskey="n" rel="next">Math</a>, Up: <a href="API-Reference.html#API-Reference" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
 </div>
 <hr>
 <a name="Kernel-1"></a>
 <h3 class="section">2.1 Kernel</h3>
 
 <p>At the very core of Chickadee, in the <code>(chickadee)</code> module, lies
-an event loop.  This loop, or &ldquo;kernel&rdquo;, is responsible for creating
-and managing the game window, dispatching input events, ensuring that
-the game is updated at the desired interval, and rendering graphics.
+an event loop.  This loop, or &ldquo;kernel&rdquo;, is responsible for ensuring
+that the game is updated at the desired interval, rendering the
+current state of the game world, and handling errors if they occur.
 The kernel implements what is known as a &ldquo;fixed timestep&rdquo; game loop,
 meaning that the game simulation will be advanced by a fixed interval
 of time and will never vary from frame to frame, unlike some other
 styles of game loops.  The appropriately named <code>run-game</code> and
 <code>abort-game</code> procedures are the entry and exit points to the
-Chickadee kernel.
+Chickadee game loop kernel.
 </p>
 <p>On its own, the kernel does not do very much at all.  In order to
-actually respond to input events, update game state, or draw something
-to the game window, a hacker with a penchant for game development must
-latch onto extension points built into the kernel, called &ldquo;hooks&rdquo;,
-and specify what action ought to be taken for any given event.  For
-example, the <code>key-press-hook</code> can be used to respond to the
-<code>a</code> key being pressed by swinging the player&rsquo;s mighty sword.
-There are many hooks available, so read on to learn about all of them.
-For information about using Guile&rsquo;s hook API, see See <a href="http://www.gnu.org/software/guile/manual/html_node/Hooks.html#Hooks">Hooks</a> in <cite>GNU Guile Reference Manual</cite>.
+actually respond to input events, update game state, or render output,
+the programmer must provide an engine.  But donât worry, you donât
+have to start from scratch!  Chickadee comes with a simple engine that
+uses SDL to create a graphical window and handle input devices, and
+OpenGL to handle rendering.  This default engine is enough for most
+users to get started writing games quickly.  More advanced users may
+want to write a custom engine that uses a different I/O system.
+Perhaps you are writing a text adventure or roguelike that reads from
+and writes to a terminal instead of a graphical window.  The game loop
+kernel makes no assumptions.
 </p>
 <dl>
-<dt><a name="index-run_002dgame"></a>Scheme Procedure: <strong>run-game</strong> <em>[#:window-title &quot;Chickadee!&quot;]        [#:window-width 640] [#:window-height 480] [#:window-fullscreen? #f]        [#:update-hz 60]</em></dt>
+<dt><a name="index-run_002dgame"></a>Procedure: <strong>run-game</strong> <em>[#:update] [#:render] [#:time] [#:error]        [#:update-hz 60]</em></dt>
 <dd>
-<p>Start the event loop.  This procedure will not return until
+<p>Start the game loop.  This procedure will not return until
 <code>abort-game</code> is called.
 </p>
-<p>The <code>update-hook</code> will be run <var>update-hz</var> times per second.
+<p>The core game loop is generic and requires four additional procedures
+to operate:
 </p>
-<p>A new graphical window will be opened with <var>window-width</var> x
-<var>window-height</var> as its dimensions, <var>window-title</var> as its
-title, and in fullscreen mode if <var>window-fullscreen?</var> is
-<code>#t</code>.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-abort_002dgame"></a>Scheme Procedure: <strong>abort-game</strong></dt>
-<dd><p>Stop the currently running Chickadee event loop.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-time"></a>Scheme Procedure: <strong>time</strong></dt>
-<dd><p>Return the current game time in milliseconds.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-load_002dhook"></a>Scheme Variable: <strong>load-hook</strong></dt>
-<dd><p>A hook that is run once when the event loop boots, before any other
-hook is run.  This hook is run with zero arguments.
-</p>
-<div class="example">
-<pre class="example">(add-hook! load-hook (lambda () (display &quot;hello!\n&quot;)))
-</pre></div>
+<ul>
+<li> <var>update</var>: Called <var>update-hz</var> times per second to advance the
+game simulation.  This procedure is called with a single argument: The
+amount of time that has passed since the last update, in milliseconds.
+</li><li> <var>render</var>: Called each iteration of the loop to render the game to
+the desired output device.  This procedure is called with a single
+argument: A value in the range [0, 1] which represents how much time
+has past since the last game state update relative to the upcoming
+game state update, as a percentage.  Because the game state is updated
+independent of rendering, it is often the case that rendering is
+occuring between two updates.  If the game is rendered as it was
+during the last update, a strange side-effect will occur that makes
+animation appear rough or &ldquo;choppy&rdquo;.  To counter this, the
+<var>alpha</var> value can be used to perfrom a linear interpolation of a
+moving object between its current position and its previous position.
+This odd trick has the pleasing result of making the animation look
+smooth again, but requires keeping track of previous state.
+</li><li> <var>time</var>: Called to get the current time in milliseconds.  This
+procedure is called with no arguments.
+</li><li> <var>error</var>: Called when an error from the <var>update</var> or
+<var>render</var> procedures reaches the game loop.  This procedure is
+called with three arguments: The call stack, the error key, and the
+error arguments.  If no error handler is provided, the default
+behavior is to simply re-throw the error.
+</li></ul>
 
 </dd></dl>
 
 <dl>
-<dt><a name="index-update_002dhook"></a>Scheme Variable: <strong>update-hook</strong></dt>
-<dd><p>A hook that is run every time the game simulation should be advanced.
-This hook is run with a single argument <var>dt</var>, the fixed timestep
-that was configured when the event loop was started, in milliseconds.
-</p>
-<div class="example">
-<pre class="example">(add-hook! update-hook (lambda (dt) (display &quot;tick!\n&quot;)))
-</pre></div>
-
-</dd></dl>
+<dt><a name="index-abort_002dgame"></a>Procedure: <strong>abort-game</strong></dt>
+<dd><p>Stop the currently running Chickadee game loop.
+</p></dd></dl>
 
-<dl>
-<dt><a name="index-before_002ddraw_002dhook"></a>Scheme Variable: <strong>before-draw-hook</strong></dt>
-<dd><p>A hook that is run before a frame is rendered.  This hook is run with
-zero arguments.
+<p>Since most users will want to write 2D/3D games with hardware
+accelerated graphics rendering, controlled via keyboard, mouse, or
+game controller, Chickadee comes with an easy to use engine just for
+this purpose in the <code>(chickadee sdl)</code> module:
+<code>run-game/sdl</code>.
 </p>
-<div class="example">
-<pre class="example">(add-hook! before-draw-hook (lambda () (display &quot;about to draw!\n&quot;)))
-</pre></div>
-
-</dd></dl>
-
 <dl>
-<dt><a name="index-after_002ddraw_002dhook"></a>Scheme Variable: <strong>after-draw-hook</strong></dt>
-<dd><p>A hook that is run after a frame is rendered.  This hook is run with
-zero arguments.
-</p>
-<div class="example">
-<pre class="example">(add-hook! after-draw-hook (lambda () (display &quot;done drawing!\n&quot;)))
-</pre></div>
-
-<p>Combined with <code>before-draw-hook</code>, one can perform a frames per
-second calculation to monitor game performance and stability.
+<dt><a name="index-run_002dgame_002fsdl"></a>Procedure: <strong>run-game/sdl</strong> <em>[#:window-title &quot;Chickadee!&quot;]        [#:window-width 640] [#:window-height 480]        [#:window-fullscreen? <code>#f</code>] [#:update-hz 60]        [#:load] [#:update] [#:draw] [#:quit]        [#:key-press] [#:key-release] [#:text-input]        [#:mouse-press] [#:mouse-release] [#:mouse-move]        [#:controller-add] [#:controller-remove] [#:controller-press]        [#:controller-release] [#:controller-move] [#:error]</em></dt>
+<dd>
+<p>Run the Chickadee game loop using the SDL engine.
 </p>
-</dd></dl>
-
-<dl>
-<dt><a name="index-draw_002dhook"></a>Scheme Variable: <strong>draw-hook</strong></dt>
-<dd><p>A hook that is run each time a frame should be rendered.  This hook is
-run with a single argument <var>alpha</var>, a value in the range [0, 1]
-which represents how much time has past since the last game state
-update relative to the upcoming game state update, as a percentage.
-Because the game state is updated independent of rendering, it is
-often the case that rendering is occuring between two updates.  If the
-game is rendered as it was during the last update, a strange
-side-effect will occur that makes animation appear rough or
-&ldquo;choppy&rdquo;.  To counter this, the <var>alpha</var> value can be used to
-perfrom a linear interpolation of a moving object between its current
-position and its previous position.  This odd trick has the pleasing
-result of making the animation look smooth again, but requires keeping
-track of previous state.
+<p>A new graphical window will be opened with <var>window-width</var> x
+<var>window-height</var> as its dimensions, <var>window-title</var> as its
+title, and in fullscreen mode if <var>window-fullscreen?</var> is
+<code>#t</code>.
 </p>
+<ul>
+<li> <var>load</var>: Called with zero arguments when the game window has opened
+but before the game loop has started.  Can be used to perform
+initialization that requires an open window and OpenGL context such as
+loading textures.
 
-<div class="example">
-<pre class="example">(add-hook! draw-hook (lambda (alpha) (display &quot;&lt;(._.&lt;) \n&quot;)))
-</pre></div>
+</li><li> <var>update</var>: Called <var>update-hz</var> times per second with one
+argument: The amount of time to advance the game simulation.
 
-</dd></dl>
+</li><li> <var>draw</var>: Called each time a frame should be rendered with a single
+argument known as the <code>alpha</code> value.  See the documentation for
+<code>run-game</code> for an explanation of this value.
 
-<dl>
-<dt><a name="index-quit_002dhook"></a>Scheme Variable: <strong>quit-hook</strong></dt>
-<dd><p>A hook that is run when the user clicks the close button on the game
-window.  This hook is run with zero arguments.
-</p>
-<div class="example">
-<pre class="example">(add-hook! quit-hook (lambda () (display &quot;bye!\n&quot;)))
-</pre></div>
+</li><li> <var>quit</var>: Called with zero arguments when the user tries to close
+the game window.  The default behavior is to exit the game.
 
-</dd></dl>
+</li><li> <var>key-press</var>: Called with four arguments when a key is pressed on
+the keyboard:
 
-<dl>
-<dt><a name="index-key_002dpress_002dhook"></a>Scheme Variable: <strong>key-press-hook</strong></dt>
-<dd><p>A hook that is run when a key is pressed on the keyboard.  This hook
-is run with four arguments:
-</p>
 <ol>
 <li> <var>key</var>: The symbolic name of the &ldquo;virtual&rdquo; key that was pressed.
 For example: <code>backspace</code>.  It&rsquo;s called a virtual key because the
 operating system may map a physical keyboard key to another key
-entirely, such as how the author binds the &ldquo;caps lock&rdquo; key to mean
-&ldquo;control&rdquo;.
+entirely, such as how the author likes to bind the &ldquo;caps lock&rdquo; key
+to mean &ldquo;control&rdquo;.
 
 </li><li> <var>scancode</var>: The symbolic name of the physical key that was
 pressed.
@@ -246,21 +214,9 @@ include <code>ctrl</code>, <code>alt</code>, and <code>shift</code>.
 
 </li></ol>
 
-<div class="example">
-<pre class="example">(add-hook! key-press-hook
-           (lambda (key scancode modifiers repeat?)
-             (display &quot;pressed key: &quot;)
-             (display key)
-             (newline)))
-</pre></div>
-
-</dd></dl>
+</li><li> <var>key-release</var>: Called with three arguments when a key is released
+on the keyboard:
 
-<dl>
-<dt><a name="index-key_002drelease_002dhook"></a>Scheme Variable: <strong>key-release-hook</strong></dt>
-<dd><p>A hook that is run when a key is released on the keyboard.  This hook
-is run with three arguments:
-</p>
 <ol>
 <li> <var>key</var>: The symbolic name of the &ldquo;virtual&rdquo; key that was released.
 
@@ -272,20 +228,11 @@ were being held down when the key was released.
 
 </li></ol>
 
-</dd></dl>
+</li><li> <var>text-input</var>: Called with a single argument, a string of text,
+when printable text is typed on the keyboard.
 
-<dl>
-<dt><a name="index-text_002dinput_002dhook"></a>Scheme Variable: <strong>text-input-hook</strong></dt>
-<dd><p>A hook that is run when printable text is typed on the keyboard.  This
-hook is run with a single argument, <var>text</var>, a string containing
-the text that was entered.
-</p></dd></dl>
-
-<dl>
-<dt><a name="index-mouse_002dpress_002dhook"></a>Scheme Variable: <strong>mouse-press-hook</strong></dt>
-<dd><p>A hook that is run when a mouse button is pressed.  This hook is run
-with four arguments:
-</p>
+</li><li> <var>mouse-press</var>: Called with four arguments when a mouse button is
+pressed:
 <ol>
 <li> <var>button</var>: The symbolic name of the button that was pressed, such
 as <code>left</code>, <code>middle</code>, or <code>right</code>.
@@ -298,13 +245,9 @@ as <code>left</code>, <code>middle</code>, or <code>right</code>.
 
 </li></ol>
 
-</dd></dl>
+</li><li> <var>mouse-release</var>: Called with three arguments when a mouse button
+is released:
 
-<dl>
-<dt><a name="index-mouse_002drelease_002dhook"></a>Scheme Variable: <strong>mouse-release-hook</strong></dt>
-<dd><p>A hook that is run when a mouse button is released.  This hook is run
-with three arguments:
-</p>
 <ol>
 <li> <var>button</var>: The symbolic name of the button that was released.
 
@@ -314,13 +257,8 @@ with three arguments:
 
 </li></ol>
 
-</dd></dl>
+</li><li> <var>mouse-move</var>: Called with five arguments when the mouse is moved:
 
-<dl>
-<dt><a name="index-mouse_002dmove_002dhook"></a>Scheme Variable: <strong>mouse-move-hook</strong></dt>
-<dd><p>A hook that is run when the mouse is moved.  This hook is run with
-five arguments:
-</p>
 <ol>
 <li> <var>x</var>: The x coordinate of the mouse cursor.
 
@@ -337,27 +275,15 @@ mouse was moved.
 
 </li></ol>
 
-</dd></dl>
+</li><li> <var>controller-add</var>: Called with a single argument, an SDL game
+controller object, when a game controller is connected.
 
-<dl>
-<dt><a name="index-controller_002dadd_002dhook"></a>Scheme Variable: <strong>controller-add-hook</strong></dt>
-<dd><p>A hook that is run when a game controller is connected.  This hook is
-run with a single argument, <var>controller</var>, the controller that was
-connected.
-</p></dd></dl>
+</li><li> <var>controller-remove</var>: Called with a single argument, an SDL game
+controller object, when a game controller is disconnected.
 
-<dl>
-<dt><a name="index-controller_002dremove_002dhook"></a>Scheme Variable: <strong>controller-remove-hook</strong></dt>
-<dd><p>A hook that is run when a game controller is disconnected.  This hook
-is run with a single argument, <var>controller</var>, the controller that
-was disconnected.
-</p></dd></dl>
+</li><li> <var>controller-press</var>: Called with two arguments when a button on a
+game controller is pressed:
 
-<dl>
-<dt><a name="index-controller_002dpress_002dhook"></a>Scheme Variable: <strong>controller-press-hook</strong></dt>
-<dd><p>A hook that is run when a button on a game controller is pressed.
-This hook is run with two arguments:
-</p>
 <ol>
 <li> <var>controller</var>: The controller that triggered the event.
 
@@ -385,14 +311,9 @@ Possible buttons are:
 
 </li></ol>
 
-</dd></dl>
+</li><li> <var>controller-release</var>: Called with two arguments when a button on a
+game controller is released:
 
-<dl>
-<dt><a name="index-controller_002drelease_002dhook"></a>Scheme Variable: <strong>controller-release-hook</strong></dt>
-<dd><p>A hook that is run when a button on a game controller is released.
-</p>
-<p>This hook is run with two arguments:
-</p>
 <ol>
 <li> <var>controller</var>: The controller that triggered the event.
 
@@ -400,13 +321,9 @@ Possible buttons are:
 
 </li></ol>
 
-</dd></dl>
+</li><li> <var>controller-move</var>: Called with three arguments when an analog
+stick or trigger on a game controller is moved:
 
-<dl>
-<dt><a name="index-controller_002dmove_002dhook"></a>Scheme Variable: <strong>controller-move-hook</strong></dt>
-<dd><p>A hook that is run when an analog stick or trigger on a game
-controller is moved.  This hook is run with three arguments
-</p>
 <ol>
 <li> <var>controller</var>: The controller that triggered the event.
 
@@ -424,12 +341,27 @@ values are:
 
 </li></ol>
 
+</li><li> <var>error</var>: Called with three arguments when an error occurs:
+
+<ol>
+<li> <var>stack</var>: The call stack at the point of error.
+
+</li><li> <var>key</var>: The exception key.
+
+</li><li> <var>args</var>: The arguments thrown with the exception.
+
+</li></ol>
+
+<p>The default behavior is to re-throw the error.
+</p>
+</li></ul>
+
 </dd></dl>
 
 <hr>
 <div class="header">
 <p>
-Next: <a href="Input.html#Input" accesskey="n" rel="next">Input</a>, Up: <a href="API-Reference.html#API-Reference" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+Next: <a href="Math.html#Math" accesskey="n" rel="next">Math</a>, Up: <a href="API-Reference.html#API-Reference" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
 </div>
 
 
diff --git a/manuals/chickadee/Lines-and-Shapes.html b/manuals/chickadee/Lines-and-Shapes.html
index 13232ab..05ad725 100644
--- a/manuals/chickadee/Lines-and-Shapes.html
+++ b/manuals/chickadee/Lines-and-Shapes.html
@@ -16,22 +16,22 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Lines and Shapes</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Lines and Shapes (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Lines and Shapes">
-<meta name="keywords" content="The Chickadee Game Toolkit: Lines and Shapes">
+<meta name="description" content="Lines and Shapes (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Lines and Shapes (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
 <link href="Graphics.html#Graphics" rel="up" title="Graphics">
 <link href="Fonts.html#Fonts" rel="next" title="Fonts">
-<link href="Sprites.html#Sprites" rel="prev" title="Sprites">
+<link href="Tile-Maps.html#Tile-Maps" rel="prev" title="Tile Maps">
 <style type="text/css">
 <!--
 a.summary-letter {text-decoration: none}
@@ -90,18 +90,18 @@ ul.no-bullet {list-style: none}
 <a name="Lines-and-Shapes"></a>
 <div class="header">
 <p>
-Next: <a href="Fonts.html#Fonts" accesskey="n" rel="next">Fonts</a>, Previous: <a href="Sprites.html#Sprites" accesskey="p" rel="prev">Sprites</a>, Up: <a href="Graphics.html#Graphics" accesskey="u" rel="up">Graphics</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+Next: <a href="Fonts.html#Fonts" accesskey="n" rel="next">Fonts</a>, Previous: <a href="Tile-Maps.html#Tile-Maps" accesskey="p" rel="prev">Tile Maps</a>, Up: <a href="Graphics.html#Graphics" accesskey="u" rel="up">Graphics</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
 </div>
 <hr>
 <a name="Lines-and-Shapes-1"></a>
-<h4 class="subsection">2.4.4 Lines and Shapes</h4>
+<h4 class="subsection">2.3.5 Lines and Shapes</h4>
 
 <p>Sprites are fun, but sometimes simple, untextured lines and polygons
 are desired.  That&rsquo;s where the <code>(chickadee render shapes)</code> module
 comes in!
 </p>
 <dl>
-<dt><a name="index-draw_002dline"></a>Scheme Procedure: <strong>draw-line</strong> <em><var>start</var> <var>end</var>        [#:thickness 0.5] [#:feather 1.0] [#:cap round] [#:color]        [#:shader]</em></dt>
+<dt><a name="index-draw_002dline"></a>Procedure: <strong>draw-line</strong> <em><var>start</var> <var>end</var>        [#:thickness 0.5] [#:feather 1.0] [#:cap round] [#:color]        [#:shader]</em></dt>
 <dd>
 <p>Draw a line segment from <var>start</var> to <var>end</var>. The line will be
 <var>thickness</var> pixels thick with an antialiased border <var>feather</var>
@@ -113,6 +113,32 @@ the <var>shader</var> argument to override the built-in line segment
 shader.
 </p></dd></dl>
 
+<dl>
+<dt><a name="index-draw_002dbezier_002dcurve"></a>Procedure: <strong>draw-bezier-curve</strong> <em><var>bezier</var> [#:segments 32]                                      [#:control-points?] [#:tangents?]                                      [#:control-point-size 8]                                      [#:control-point-color yellow]                                      [#:tangent-color yellow]                                      [#:thickness 0.5] [#:feather 1.0]                                      [#:matrix]</em></dt>
+<dd>
+<p>Draw the curve defined by <var>bezier</var> using a resolution of N
+<var>segments</var>.  When <var>control-points?</var> is <code>#t</code>, the control
+points are rendered as squares of size <var>control-point-size</var> pixels
+and a color of <var>control-point-color</var>.  When <var>tangents?</var> is
+<code>#t</code>, the tangent lines from terminal point to control point are
+rendered using the color <var>tangent-color</var>.
+</p>
+<p>All line segments rendered use <code>draw-line</code>, and thus the
+arguments <var>thickness</var> and <var>feather</var> have the same effect as in
+that procedure.
+</p>
+<p>A custom <var>matrix</var> may be passed for applications that require more
+control over the final output.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-draw_002dbezier_002dpath"></a>Procedure: <strong>draw-bezier-path</strong> <em><var>path</var> [#:segments 32]                                     [#:control-points?] [#:tangents?]                                     [#:control-point-size 8]                                     [#:control-point-color yellow]                                     [#:tangent-color yellow]                                     [#:thickness 0.5] [#:feather 1.0]                                     [#:matrix]</em></dt>
+<dd>
+<p>Render <var>path</var>, a list of bezier curves.  See the documentation for
+<code>draw-bezier-curve</code> for an explanation of all the keyword
+arguments.
+</p></dd></dl>
+
 
 
 
diff --git a/manuals/chickadee/Math.html b/manuals/chickadee/Math.html
index fcf9746..a41a7f8 100644
--- a/manuals/chickadee/Math.html
+++ b/manuals/chickadee/Math.html
@@ -16,22 +16,22 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Math</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Math (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Math">
-<meta name="keywords" content="The Chickadee Game Toolkit: Math">
+<meta name="description" content="Math (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Math (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
 <link href="API-Reference.html#API-Reference" rel="up" title="API Reference">
-<link href="Vectors.html#Vectors" rel="next" title="Vectors">
-<link href="Input.html#Input" rel="prev" title="Input">
+<link href="Basics.html#Basics" rel="next" title="Basics">
+<link href="Kernel.html#Kernel" rel="prev" title="Kernel">
 <style type="text/css">
 <!--
 a.summary-letter {text-decoration: none}
@@ -90,11 +90,11 @@ ul.no-bullet {list-style: none}
 <a name="Math"></a>
 <div class="header">
 <p>
-Next: <a href="Graphics.html#Graphics" accesskey="n" rel="next">Graphics</a>, Previous: <a href="Input.html#Input" accesskey="p" rel="prev">Input</a>, Up: <a href="API-Reference.html#API-Reference" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+Next: <a href="Graphics.html#Graphics" accesskey="n" rel="next">Graphics</a>, Previous: <a href="Kernel.html#Kernel" accesskey="p" rel="prev">Kernel</a>, Up: <a href="API-Reference.html#API-Reference" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
 </div>
 <hr>
 <a name="Math-1"></a>
-<h3 class="section">2.3 Math</h3>
+<h3 class="section">2.2 Math</h3>
 
 <p>Chickadee contains data types and procedures for performing the most
 common computations in video game simulations such as linear algebra
@@ -102,12 +102,24 @@ with vectors and matrices and axis-aligned bounding box collision
 detection.
 </p>
 <table class="menu" border="0" cellspacing="0">
-<tr><td align="left" valign="top">&bull; <a href="Vectors.html#Vectors" accesskey="1">Vectors</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Euclidean vectors.
+<tr><td align="left" valign="top">&bull; <a href="Basics.html#Basics" accesskey="1">Basics</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Commonly used, miscellaneous things.
 </td></tr>
-<tr><td align="left" valign="top">&bull; <a href="Matrices.html#Matrices" accesskey="2">Matrices</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Transformation matrices.
+<tr><td align="left" valign="top">&bull; <a href="Vectors.html#Vectors" accesskey="2">Vectors</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Euclidean vectors.
 </td></tr>
 <tr><td align="left" valign="top">&bull; <a href="Rectangles.html#Rectangles" accesskey="3">Rectangles</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Axis-aligned bounding boxes.
 </td></tr>
+<tr><td align="left" valign="top">&bull; <a href="Grid.html#Grid" accesskey="4">Grid</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Spatial partitioning for bounding boxes.
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="Matrices.html#Matrices" accesskey="5">Matrices</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Transformation matrices.
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="Quaternions.html#Quaternions" accesskey="6">Quaternions</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Rotations about an arbitrary axis.
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="Easings.html#Easings" accesskey="7">Easings</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Easing functions for interesting animations.
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="Bezier-Curves.html#Bezier-Curves" accesskey="8">Bezier Curves</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Cubic Bezier curves and paths in 2D space.
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="Path-Finding.html#Path-Finding" accesskey="9">Path Finding</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Generic A* path finding.
+</td></tr>
 </table>
 
 
diff --git a/manuals/chickadee/Matrices.html b/manuals/chickadee/Matrices.html
index 8630efd..5f664ef 100644
--- a/manuals/chickadee/Matrices.html
+++ b/manuals/chickadee/Matrices.html
@@ -16,22 +16,22 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Matrices</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Matrices (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Matrices">
-<meta name="keywords" content="The Chickadee Game Toolkit: Matrices">
+<meta name="description" content="Matrices (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Matrices (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
 <link href="Math.html#Math" rel="up" title="Math">
-<link href="Rectangles.html#Rectangles" rel="next" title="Rectangles">
-<link href="Vectors.html#Vectors" rel="prev" title="Vectors">
+<link href="Quaternions.html#Quaternions" rel="next" title="Quaternions">
+<link href="Grid.html#Grid" rel="prev" title="Grid">
 <style type="text/css">
 <!--
 a.summary-letter {text-decoration: none}
@@ -90,12 +90,169 @@ ul.no-bullet {list-style: none}
 <a name="Matrices"></a>
 <div class="header">
 <p>
-Next: <a href="Rectangles.html#Rectangles" accesskey="n" rel="next">Rectangles</a>, Previous: <a href="Vectors.html#Vectors" accesskey="p" rel="prev">Vectors</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+Next: <a href="Quaternions.html#Quaternions" accesskey="n" rel="next">Quaternions</a>, Previous: <a href="Grid.html#Grid" accesskey="p" rel="prev">Grid</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
 </div>
 <hr>
 <a name="Matrices-1"></a>
-<h4 class="subsection">2.3.2 Matrices</h4>
+<h4 class="subsection">2.2.5 Matrices</h4>
+
+<p>The <code>(chickadee math matrix)</code> module provides an interface for
+working with the most common type of matrices in game development: 4x4
+transformation matrices.
+</p>
+<a name="Another-Note-About-Performance"></a>
+<h4 class="subsubsection">2.2.5.1 Another Note About Performance</h4>
+
+<p>Much like the vector API, the matrix API is commonly used in
+performance critical code paths.  In order to reduce the amount of
+garbage generated and improve matrix multiplication performance, there
+are many procedures that perform in-place modifications of matrix
+objects.
+</p>
+<a name="Matrix-Operations"></a>
+<h4 class="subsubsection">2.2.5.2 Matrix Operations</h4>
+
+<dl>
+<dt><a name="index-make_002dmatrix4"></a>Procedure: <strong>make-matrix4</strong> <em><var>aa</var> <var>ab</var> <var>ac</var> <var>ad</var>                                 <var>ba</var> <var>bb</var> <var>bc</var> <var>bd</var>                                 <var>ca</var> <var>cb</var> <var>cc</var> <var>cd</var>                                 <var>da</var> <var>db</var> <var>dc</var> <var>dd</var></em></dt>
+<dd>
+<p>Return a new 4x4 matrix initialized with the given 16 values in
+column-major format.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-make_002dnull_002dmatrix4"></a>Procedure: <strong>make-null-matrix4</strong></dt>
+<dd><p>Return a new 4x4 matrix with all values initialized to 0.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-make_002didentity_002dmatrix4"></a>Procedure: <strong>make-identity-matrix4</strong></dt>
+<dd><p>Return a new 4x4 identity matrix.  Any matrix multiplied by the
+identity matrix yields the original matrix.  This procedure is
+equivalent to the following code:
+</p>
+<div class="example">
+<pre class="example">(make-matrix4 1 0 0 0
+              0 1 0 0
+              0 0 1 0
+              0 0 0 1)
+</pre></div>
+
+</dd></dl>
+
+<dl>
+<dt><a name="index-matrix4_003f"></a>Procedure: <strong>matrix4?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is a 4x4 matrix.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-matrix4_002a"></a>Procedure: <strong>matrix4*</strong> <em>. <var>matrices</var></em></dt>
+<dd><p>Return a new 4x4 matrix containing the product of multiplying all of
+the given <var>matrices</var>.
+</p>
+<p>Note: Remember that matrix multiplication is <strong>not</strong> commutative!
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-orthographic_002dprojection"></a>Procedure: <strong>orthographic-projection</strong> <em><var>left</var> <var>right</var>                                            <var>top</var> <var>bottom</var>                                            <var>near</var> <var>far</var></em></dt>
+<dd>
+<p>Return a new 4x4 matrix that represents an orthographic (2D)
+projection for the horizontal clipping plane <var>top</var> and
+<var>bottom</var>, the vertical clipping plane <var>top</var> and <var>bottom</var>,
+and the depth clipping plane <var>near</var> and <var>far</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-perspective_002dprojection"></a>Procedure: <strong>perspective-projection</strong> <em><var>fov</var>                                           <var>aspect-ratio</var>                                           <var>near</var> <var>far</var></em></dt>
+<dd>
+<p>Return a new 4x4 matrix that represents a perspective (3D) projection
+with a field of vision of <var>fov</var> radians, an aspect ratio of
+<var>aspect-ratio</var>, and a depth clipping plane defined by <var>near</var>
+and <var>far</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-matrix4_002dtranslate"></a>Procedure: <strong>matrix4-translate</strong> <em><var>x</var></em></dt>
+<dd><p>Return a new 4x4 matrix that represents a translation by <var>x</var>, a 2D
+vector, a 3D vector, or a rectangle (in which case the bottom-left
+corner of the rectangle is used).
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-matrix4_002dscale"></a>Procedure: <strong>matrix4-scale</strong> <em><var>s</var></em></dt>
+<dd><p>Return a new 4x4 matrix that represents a scaling along the X, Y, and
+Z axes by the scaling factor <var>s</var>, a real number.
+</p></dd></dl>
 
+<dl>
+<dt><a name="index-matrix4_002drotate"></a>Procedure: <strong>matrix4-rotate</strong> <em><var>q</var></em></dt>
+<dd><p>Return a new 4x4 matrix that represents a rotation about an arbitrary
+axis defined by the quaternion <var>q</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-matrix4_002drotate_002dz"></a>Procedure: <strong>matrix4-rotate-z</strong> <em><var>theta</var></em></dt>
+<dd><p>Return a new 4x4 matrix that represents a rotation about the Z axis by
+<var>theta</var> radians.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-matrix4_002didentity_0021"></a>Procedure: <strong>matrix4-identity!</strong> <em><var>matrix</var></em></dt>
+<dd><p>Modify <var>matrix</var> in-place to contain the identity matrix.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-matrix4_002dmult_0021"></a>Procedure: <strong>matrix4-mult!</strong> <em><var>dest</var> <var>a</var> <var>b</var></em></dt>
+<dd><p>Multiply the 4x4 matrix <var>a</var> by the 4x4 matrix <var>b</var> and store
+the result in the 4x4 matrix <var>dest</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-matrix4_002dtranslate_0021"></a>Procedure: <strong>matrix4-translate!</strong> <em><var>matrix</var> <var>x</var></em></dt>
+<dd><p>Modify <var>matrix</var> in-place to contain a translation by <var>x</var>, a 2D
+vector, a 3D vector, or a rectangle (in which case the bottom-left
+corner of the rectangle is used).
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-matrix4_002dscale_0021"></a>Procedure: <strong>matrix4-scale!</strong> <em><var>matrix</var> <var>s</var></em></dt>
+<dd><p>Modify <var>matrix</var> in-place to contain a scaling along the X, Y, and
+Z axes by the scaling factor <var>s</var>, a real number.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-matrix4_002drotate_0021"></a>Procedure: <strong>matrix4-rotate!</strong> <em><var>matrix</var> <var>q</var></em></dt>
+<dd><p>Modify <var>matrix</var> in-place to contain a rotation about an arbitrary
+axis defined by the quaternion <var>q</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-matrix4_002drotate_002dz_0021"></a>Procedure: <strong>matrix4-rotate-z!</strong> <em><var>matrix</var> <var>theta</var></em></dt>
+<dd><p>Modify <var>matrix</var> in-place to contain a rotation about the Z axis by
+<var>theta</var> radians.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-matrix4_002d2d_002dtransform_0021"></a>Procedure: <strong>matrix4-2d-transform!</strong> <em><var>matrix</var> [#:origin]                                          [#:position] [#:rotation]                                          [#:scale] [#:skew]</em></dt>
+<dd>
+<p>Modify <var>matrix</var> in-place to contain the transformation described
+by <var>position</var>, a 2D vector or rectangle, <var>rotation</var>, a scalar
+representing a rotation about the Z axis, <var>scale</var>, a 2D vector,
+and <var>skew</var>, a 2D vector.  The transformation happens with respect
+to <var>origin</var>, a 2D vector.  If an argument is not provided, that
+particular transformation will not be included in the result.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-transform_0021"></a>Procedure: <strong>transform!</strong> <em><var>matrix</var> <var>v</var></em></dt>
+<dd><p>Modify the 2D vector <var>v</var> in-place by multiplying it by the 4x4
+matrix <var>matrix</var>.
+</p></dd></dl>
+
+<hr>
+<div class="header">
+<p>
+Next: <a href="Quaternions.html#Quaternions" accesskey="n" rel="next">Quaternions</a>, Previous: <a href="Grid.html#Grid" accesskey="p" rel="prev">Grid</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
 
 
 
diff --git a/manuals/chickadee/Path-Finding.html b/manuals/chickadee/Path-Finding.html
new file mode 100644
index 0000000..63819aa
--- /dev/null
+++ b/manuals/chickadee/Path-Finding.html
@@ -0,0 +1,180 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- Copyright (C) 2017  David Thompson davet@gnu.org
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled "GNU
+Free Documentation License".
+
+A copy of the license is also available from the Free Software
+Foundation Web site at http://www.gnu.org/licenses/fdl.html.
+
+
+The document was typeset with
+http://www.texinfo.org/ (GNU Texinfo).
+ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Path Finding (The Chickadee Game Toolkit)</title>
+
+<meta name="description" content="Path Finding (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Path Finding (The Chickadee Game Toolkit)">
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+<link href="Math.html#Math" rel="up" title="Math">
+<link href="Graphics.html#Graphics" rel="next" title="Graphics">
+<link href="Bezier-Curves.html#Bezier-Curves" rel="prev" title="Bezier Curves">
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+div.display {margin-left: 3.2em}
+div.example {margin-left: 3.2em}
+div.lisp {margin-left: 3.2em}
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+div.smallexample {margin-left: 3.2em}
+div.smalllisp {margin-left: 3.2em}
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+    body {
+        margin-left: 14rem;
+        margin-right: 4rem;
+        max-width: 52rem;
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+}
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+@media (min-width: 800px) and (max-width: 1140px) {
+    body {
+        margin-left: 6rem;
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+
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+
+
+</head>
+
+<body lang="en">
+<a name="Path-Finding"></a>
+<div class="header">
+<p>
+Previous: <a href="Bezier-Curves.html#Bezier-Curves" accesskey="p" rel="prev">Bezier Curves</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Path-Finding-1"></a>
+<h4 class="subsection">2.2.9 Path Finding</h4>
+
+<p>Most game worlds have maps.  Often, these games have a need to move
+non-player characters around in an unscripted fashion.  For example,
+in a real-time strategy game, the player may command one of their
+units to attack something in the enemy base.  To do so, the unit must
+calculate the shortest route to get there.  It wouldn&rsquo;t be a very fun
+game if units didn&rsquo;t know how to transport themselves efficiently.
+This is where path finding algorithms come in handy.  The
+<code>(chickadee math path-finding)</code> module provides a generic
+implementation of the popular A* path finding algorithm.  Just add a
+map implementation!
+</p>
+<p>The example below defines a very simple town map and finds the
+quickest way to get from the town common to the school.
+</p>
+<div class="example">
+<pre class="example">(define world-map
+  '((town-common . (town-hall library))
+    (town-hall . (town-common school))
+    (library . (town-common cafe))
+    (school . (town-hall cafe))
+    (cafe . (library school))))
+(define (neighbors building)
+  (assq-ref town-map building))
+(define (cost a b) 1)
+(define (distance a b) 1)
+(define pf (make-path-finder))
+(a* pf 'town-common 'school neighbors cost distance)
+</pre></div>
+
+<p>In this case, the <code>a*</code> procedure will return the list
+<code>(town-common town-hall school)</code>, which is indeed the shortest
+route.  (The other possible route is <code>(town-common library cafe
+school)</code>.)
+</p>
+<p>The <code>a*</code> procedure does not know anything about about any kind of
+map and therefore must be told how to look up neighboring nodes, which
+is what the <code>neighbors</code> procedure in the example does. To
+simulate different types of terrain, a cost procedure is used.  In
+this example, it is just as easy to move between any two nodes because
+<code>cost</code> always returns 1.  In a real game, perhaps moving from
+from a field to a rocky hill would cost a lot more than moving from
+one field to another.  Finally, a heuristic is used to calculate an
+approximate distance between two nodes on the map.  In this simple
+association list based graph it is tough to calculate a distance
+between nodes, so the <code>distance</code> procedure isn&rsquo;t helpful and
+always returns 1.  In a real game with a tile-based map, for example,
+the heuristic could be a quick Manhattan distance calculation based on
+the coordinates of the two map tiles.  Choose an appropriate heuristic
+for optimal path finding!
+</p>
+<dl>
+<dt><a name="index-make_002dpath_002dfinder"></a>Procedure: <strong>make-path-finder</strong></dt>
+<dd><p>Return a new path finder object.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-path_002dfinder_003f"></a>Procedure: <strong>path-finder?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is a path finder.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-a_002a"></a>Procedure: <strong>a*</strong> <em><var>path-finder</var> <var>start</var> <var>goal</var>                       <var>neighbors</var> <var>cost</var> <var>distance</var></em></dt>
+<dd>
+<p>Return a list of nodes forming a path from <var>start</var> to <var>goal</var>
+using <var>path-finder</var> to hold state.  <var>neighbors</var> is a procedure
+that accepts a node and returns a list of nodes that neighbor it.
+<var>cost</var> is a procedure that accepts two neighboring nodes and
+returns the cost of moving from the first to the second as a real
+number.  <var>distance</var> is a procedure that accepts two nodes and
+returns an approximate distance between them.
+</p></dd></dl>
+
+<hr>
+<div class="header">
+<p>
+Previous: <a href="Bezier-Curves.html#Bezier-Curves" accesskey="p" rel="prev">Bezier Curves</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+
+
+
+</body>
+</html>
diff --git a/manuals/chickadee/Quaternions.html b/manuals/chickadee/Quaternions.html
new file mode 100644
index 0000000..de4c8e4
--- /dev/null
+++ b/manuals/chickadee/Quaternions.html
@@ -0,0 +1,146 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- Copyright (C) 2017  David Thompson davet@gnu.org
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled "GNU
+Free Documentation License".
+
+A copy of the license is also available from the Free Software
+Foundation Web site at http://www.gnu.org/licenses/fdl.html.
+
+
+The document was typeset with
+http://www.texinfo.org/ (GNU Texinfo).
+ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Quaternions (The Chickadee Game Toolkit)</title>
+
+<meta name="description" content="Quaternions (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Quaternions (The Chickadee Game Toolkit)">
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+<meta name="distribution" content="global">
+<meta name="Generator" content="makeinfo">
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+<link href="Index.html#Index" rel="index" title="Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Math.html#Math" rel="up" title="Math">
+<link href="Easings.html#Easings" rel="next" title="Easings">
+<link href="Matrices.html#Matrices" rel="prev" title="Matrices">
+<style type="text/css">
+<!--
+a.summary-letter {text-decoration: none}
+blockquote.indentedblock {margin-right: 0em}
+blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
+blockquote.smallquotation {font-size: smaller}
+div.display {margin-left: 3.2em}
+div.example {margin-left: 3.2em}
+div.lisp {margin-left: 3.2em}
+div.smalldisplay {margin-left: 3.2em}
+div.smallexample {margin-left: 3.2em}
+div.smalllisp {margin-left: 3.2em}
+kbd {font-style: oblique}
+pre.display {font-family: inherit}
+pre.format {font-family: inherit}
+pre.menu-comment {font-family: serif}
+pre.menu-preformatted {font-family: serif}
+pre.smalldisplay {font-family: inherit; font-size: smaller}
+pre.smallexample {font-size: smaller}
+pre.smallformat {font-family: inherit; font-size: smaller}
+pre.smalllisp {font-size: smaller}
+span.nolinebreak {white-space: nowrap}
+span.roman {font-family: initial; font-weight: normal}
+span.sansserif {font-family: sans-serif; font-weight: normal}
+ul.no-bullet {list-style: none}
+@media (min-width: 1140px) {
+    body {
+        margin-left: 14rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (min-width: 800px) and (max-width: 1140px) {
+    body {
+        margin-left: 6rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (max-width: 800px) {
+    body {
+        margin: 1rem;
+    }
+}
+
+-->
+</style>
+<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
+
+
+</head>
+
+<body lang="en">
+<a name="Quaternions"></a>
+<div class="header">
+<p>
+Next: <a href="Easings.html#Easings" accesskey="n" rel="next">Easings</a>, Previous: <a href="Matrices.html#Matrices" accesskey="p" rel="prev">Matrices</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Quaternions-1"></a>
+<h4 class="subsection">2.2.6 Quaternions</h4>
+
+<p>In game development, the quaternion is most often used to represent
+rotations.  Why not use a matrix for that, you may ask.  Unlike
+matrices, quaternions can be interpolated (animated) and produce a
+meaningful result.  When interpolating two quaternions, there is a
+smooth transition from one rotation to another, whereas interpolating
+two matrices would yield garbage.
+</p>
+<dl>
+<dt><a name="index-quaternion"></a>Procedure: <strong>quaternion</strong> <em><var>x</var> <var>y</var> <var>z</var> <var>w</var></em></dt>
+<dd><p>Return a new quaternion with values <var>x</var>, <var>y</var>, <var>z</var>, and
+<var>w</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-quaternion_003f"></a>Procedure: <strong>quaternion?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is a quaternion.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-quaternion_002dw"></a>Procedure: <strong>quaternion-w</strong> <em><var>q</var></em></dt>
+<dd><p>Return the W component of the quaternion <var>q</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-quaternion_002dx"></a>Procedure: <strong>quaternion-x</strong> <em><var>q</var></em></dt>
+<dd><p>Return the X component of the quaternion <var>q</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-quaternion_002dy"></a>Procedure: <strong>quaternion-y</strong> <em><var>q</var></em></dt>
+<dd><p>Return the Y component of the quaternion <var>q</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-quaternion_002dz"></a>Procedure: <strong>quaternion-z</strong> <em><var>q</var></em></dt>
+<dd><p>Return the Z component of the quaternion <var>q</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-make_002didentity_002dquaternion"></a>Procedure: <strong>make-identity-quaternion</strong></dt>
+<dd><p>Return the identity quaternion.
+</p></dd></dl>
+
+
+
+
+</body>
+</html>
diff --git a/manuals/chickadee/Rectangles.html b/manuals/chickadee/Rectangles.html
index 6d0c9e8..edaf4e6 100644
--- a/manuals/chickadee/Rectangles.html
+++ b/manuals/chickadee/Rectangles.html
@@ -16,22 +16,22 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Rectangles</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Rectangles (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Rectangles">
-<meta name="keywords" content="The Chickadee Game Toolkit: Rectangles">
+<meta name="description" content="Rectangles (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Rectangles (The Chickadee Game Toolkit)">
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 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
 <link href="Math.html#Math" rel="up" title="Math">
-<link href="Graphics.html#Graphics" rel="next" title="Graphics">
-<link href="Matrices.html#Matrices" rel="prev" title="Matrices">
+<link href="Grid.html#Grid" rel="next" title="Grid">
+<link href="Vectors.html#Vectors" rel="prev" title="Vectors">
 <style type="text/css">
 <!--
 a.summary-letter {text-decoration: none}
@@ -90,12 +90,247 @@ ul.no-bullet {list-style: none}
 <a name="Rectangles"></a>
 <div class="header">
 <p>
-Previous: <a href="Matrices.html#Matrices" accesskey="p" rel="prev">Matrices</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+Next: <a href="Grid.html#Grid" accesskey="n" rel="next">Grid</a>, Previous: <a href="Vectors.html#Vectors" accesskey="p" rel="prev">Vectors</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
 </div>
 <hr>
 <a name="Rectangles-1"></a>
-<h4 class="subsection">2.3.3 Rectangles</h4>
+<h4 class="subsection">2.2.3 Rectangles</h4>
+
+<p>The <code>(chickadee math rect)</code> module provides an API for
+manipulating axis-aligned bounding boxes (AABBs).  AABBs are often
+used for collision detection in games.  Common use-cases are defining
+&ldquo;hitboxes&rdquo; in platformers or using them for the &ldquo;broad phase&rdquo; of a
+collision detection algorithm that uses a more complex (and thus
+slower) method of determining the actual collisions.
+</p>
+<p>Like some of the other math modules, there exists a collection of
+functions that do in-place modification of rectangles for use in
+performance critical code paths.
+</p>
+<dl>
+<dt><a name="index-make_002drect"></a>Procedure: <strong>make-rect</strong> <em><var>x</var> <var>y</var> <var>width</var> <var>height</var></em></dt>
+<dd><p>Create a new rectangle that is <var>width</var> by <var>height</var> in size and
+whose bottom-left corner is located at (<var>x</var>, <var>y</var>).
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_003f"></a>Procedure: <strong>rect?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is a rectangle.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dwithin_003f"></a>Procedure: <strong>rect-within?</strong> <em><var>rect1</var> <var>rect2</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>rect2</var> is completely within <var>rect1</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dintersects_003f"></a>Procedure: <strong>rect-intersects?</strong> <em><var>rect1</var> <var>rect2</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>rect2</var> overlaps <var>rect1</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dcontains_003f"></a>Procedure: <strong>rect-contains?</strong> <em><var>rect</var> <var>x</var> <var>y</var></em></dt>
+<dd><p>Return <code>#t</code> if the coordinates (<var>x</var>, <var>y</var>) are within
+<var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dcontains_002dvec2_003f"></a>Procedure: <strong>rect-contains-vec2?</strong> <em><var>rect</var> <var>v</var></em></dt>
+<dd><p>Return <code>#t</code> if the 2D vector <var>v</var> is within the bounds of
+<var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dx"></a>Procedure: <strong>rect-x</strong> <em><var>rect</var></em></dt>
+<dd><p>Return the X coordinate of the lower-left corner of <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dy"></a>Procedure: <strong>rect-y</strong> <em><var>rect</var></em></dt>
+<dd><p>Return the Y coordinate of the lower-left corner of <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dleft"></a>Procedure: <strong>rect-left</strong> <em><var>rect</var></em></dt>
+<dd><p>Return the left-most X coordinate of <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dright"></a>Procedure: <strong>rect-right</strong> <em><var>rect</var></em></dt>
+<dd><p>Return the right-most X coordinate of <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dbottom"></a>Procedure: <strong>rect-bottom</strong> <em><var>rect</var></em></dt>
+<dd><p>Return the bottom-most Y coordinate of <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dtop"></a>Procedure: <strong>rect-top</strong> <em><var>rect</var></em></dt>
+<dd><p>Return the top-most Y coordinate of <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dcenter_002dx"></a>Procedure: <strong>rect-center-x</strong> <em><var>rect</var></em></dt>
+<dd><p>Return the X coordinate of the center of <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dcenter_002dy"></a>Procedure: <strong>rect-center-y</strong> <em><var>rect</var></em></dt>
+<dd><p>Return the Y coordinate of the center of <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dwidth"></a>Procedure: <strong>rect-width</strong> <em><var>rect</var></em></dt>
+<dd><p>Return the width of <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dheight"></a>Procedure: <strong>rect-height</strong> <em><var>rect</var></em></dt>
+<dd><p>Return the height of <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002darea"></a>Procedure: <strong>rect-area</strong> <em><var>rect</var></em></dt>
+<dd><p>Return the surface area covered by <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dclamp_002dx"></a>Procedure: <strong>rect-clamp-x</strong> <em><var>rect</var> <var>x</var></em></dt>
+<dd><p>Restrict <var>x</var> to the portion of the X axis covered by <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dclamp_002dy"></a>Procedure: <strong>rect-clamp-y</strong> <em><var>rect</var> <var>y</var></em></dt>
+<dd><p>Restrict <var>y</var> to the portion of the Y axis covered by <var>rect</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dclamp"></a>Procedure: <strong>rect-clamp</strong> <em><var>rect1</var> <var>rect2</var></em></dt>
+<dd><p>Return a new rect that adjusts the location of <var>rect1</var> so that it
+is completely within <var>rect2</var>.  An exception is thrown in the case
+that <var>rect1</var> cannot fit completely within <var>rect2</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dmove"></a>Procedure: <strong>rect-move</strong> <em><var>rect</var> <var>x</var> <var>y</var></em></dt>
+<dd><p>Return a new rectangle based on <var>rect</var> but moved to the
+coordinates (<var>x</var>, <var>y</var>).
+</p></dd></dl>
 
+<dl>
+<dt><a name="index-rect_002dmove_002dvec2"></a>Procedure: <strong>rect-move-vec2</strong> <em><var>rect</var> <var>v</var></em></dt>
+<dd><p>Return a new rectangle based on <var>rect</var> but moved to the
+coordinates in the 2D vector <var>v</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dmove_002dby"></a>Procedure: <strong>rect-move-by</strong> <em><var>rect</var> <var>x</var> <var>y</var></em></dt>
+<dd><p>Return a new rectangle based on <var>rect</var> but moved by (<var>x</var>,
+<var>y</var>) units relative to its current location.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dmove_002dby_002dvec2"></a>Procedure: <strong>rect-move-by-vec2</strong> <em><var>rect</var> <var>v</var></em></dt>
+<dd><p>Return a new rectangle based on <var>rect</var> but moved by the 2D vector
+<var>v</var> relative to its current location.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dinflate"></a>Procedure: <strong>rect-inflate</strong> <em><var>rect</var> <var>width</var> <var>height</var></em></dt>
+<dd><p>Return a new rectangle based on <var>rect</var>, but expanded by
+<var>width</var> units on the X axis and <var>height</var> units on the Y axis,
+while keeping the rectangle centered on the same point.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dunion"></a>Procedure: <strong>rect-union</strong> <em><var>rect1</var> <var>rect2</var></em></dt>
+<dd><p>Return a new rectangle that completely covers the area of <var>rect1</var>
+and <var>rect2</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dclip"></a>Procedure: <strong>rect-clip</strong> <em><var>rect1</var> <var>rect2</var></em></dt>
+<dd><p>Return a new rectangle that is the overlapping region of <var>rect1</var>
+and <var>rect2</var>.  If the two rectangles do not overlap, a rectangle of
+0 width and 0 height is returned.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-set_002drect_002dx_0021"></a>Procedure: <strong>set-rect-x!</strong> <em><var>rect</var> <var>x</var></em></dt>
+<dd><p>Set the left X coordinate of <var>rect</var> to <var>x</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-set_002drect_002dy_0021"></a>Procedure: <strong>set-rect-y!</strong> <em><var>rect</var> <var>y</var></em></dt>
+<dd><p>Set the bottom Y coordinate of <var>rect</var> to <var>y</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-set_002drect_002dwidth_0021"></a>Procedure: <strong>set-rect-width!</strong> <em><var>rect</var> <var>width</var></em></dt>
+<dd><p>Set the width of <var>rect</var> to <var>width</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-set_002drect_002dheight_0021"></a>Procedure: <strong>set-rect-height!</strong> <em><var>rect</var> <var>height</var></em></dt>
+<dd><p>Set the height of <var>rect</var> to <var>height</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dmove_0021"></a>Procedure: <strong>rect-move!</strong> <em><var>rect</var> <var>x</var> <var>y</var></em></dt>
+<dd><p>Move <var>rect</var> to (<var>x</var>, <var>y</var>) in-place.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dmove_002dvec2_0021"></a>Procedure: <strong>rect-move-vec2!</strong> <em><var>rect</var> <var>v</var></em></dt>
+<dd><p>Move <var>rect</var> to the 2D vector <var>v</var> in-place.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dmove_002dby_0021"></a>Procedure: <strong>rect-move-by!</strong> <em><var>rect</var> <var>x</var> <var>y</var></em></dt>
+<dd><p>Move <var>rect</var> by (<var>x</var>, <var>y</var>) in-place.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dmove_002dby_002dvec2_0021"></a>Procedure: <strong>rect-move-by-vec2!</strong> <em><var>rect</var> <var>v</var></em></dt>
+<dd><p>Move <var>rect</var> by the 2D vector <var>v</var> in-place.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dinflate_0021"></a>Procedure: <strong>rect-inflate!</strong> <em><var>rect</var> <var>width</var> <var>height</var></em></dt>
+<dd><p>Expand <var>rect</var> by <var>width</var> and <var>height</var> in-place.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dunion_0021"></a>Procedure: <strong>rect-union!</strong> <em><var>rect1</var> <var>rect2</var></em></dt>
+<dd><p>Modify <var>rect1</var> in-place to completely cover the area of both
+<var>rect1</var> and <var>rect2</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dclip_0021"></a>Procedure: <strong>rect-clip!</strong> <em><var>rect1</var> <var>rect2</var></em></dt>
+<dd><p>Modify <var>rect1</var> in-place to be the overlapping region of
+<var>rect1</var> and <var>rect2</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-rect_002dclamp_0021"></a>Procedure: <strong>rect-clamp!</strong> <em><var>rect1</var> <var>rect2</var></em></dt>
+<dd><p>Adjust the location of <var>rect1</var> in-place so that its bounds are
+completely within <var>rect2</var>.  An exception is thrown in the case
+that <var>rect1</var> cannot fit completely within <var>rect2</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002dclamp_002dto_002drect_0021"></a>Procedure: <strong>vec2-clamp-to-rect!</strong> <em><var>v</var> <var>rect</var></em></dt>
+<dd><p>Restrict the coordinates of the 2D vector <var>v</var> so that they are
+within the bounds of <var>rect</var>.  <var>v</var> is modified in-place.
+</p></dd></dl>
+
+<hr>
+<div class="header">
+<p>
+Next: <a href="Grid.html#Grid" accesskey="n" rel="next">Grid</a>, Previous: <a href="Vectors.html#Vectors" accesskey="p" rel="prev">Vectors</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
 
 
 
diff --git a/manuals/chickadee/Rendering-Engine.html b/manuals/chickadee/Rendering-Engine.html
index 9bc09da..fa9f021 100644
--- a/manuals/chickadee/Rendering-Engine.html
+++ b/manuals/chickadee/Rendering-Engine.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Rendering Engine</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Rendering Engine (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Rendering Engine">
-<meta name="keywords" content="The Chickadee Game Toolkit: Rendering Engine">
+<meta name="description" content="Rendering Engine (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Rendering Engine (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
@@ -94,7 +94,7 @@ Next: <a href="Textures.html#Textures" accesskey="n" rel="next">Textures</a>, Up
 </div>
 <hr>
 <a name="Rendering-Engine-1"></a>
-<h4 class="subsection">2.4.1 Rendering Engine</h4>
+<h4 class="subsection">2.3.1 Rendering Engine</h4>
 
 <p>Chickadee defines rendering using a metaphor familiar to Scheme
 programmers: procedure application.  A shader (see <a href="Shaders.html#Shaders">Shaders</a>) is
@@ -113,8 +113,8 @@ would be tedious to have to have to specify them each time
 <code>(chickadee render)</code> module.
 </p>
 <dl>
-<dt><a name="index-gpu_002dapply"></a>Scheme Syntax: <strong>gpu-apply</strong> <em><var>shader</var> <var>vertex-array</var>        [#:uniform-key <var>uniform-value</var> ...]</em></dt>
-<dt><a name="index-gpu_002dapply_002a"></a>Scheme Syntax: <strong>gpu-apply*</strong> <em><var>shader</var> <var>vertex-array</var>         <var>count</var> [#:uniform-key <var>uniform-value</var> ...]</em></dt>
+<dt><a name="index-gpu_002dapply"></a>Syntax: <strong>gpu-apply</strong> <em><var>shader</var> <var>vertex-array</var>        [#:uniform-key <var>uniform-value</var> ...]</em></dt>
+<dt><a name="index-gpu_002dapply_002a"></a>Syntax: <strong>gpu-apply*</strong> <em><var>shader</var> <var>vertex-array</var>         <var>count</var> [#:uniform-key <var>uniform-value</var> ...]</em></dt>
 <dd>
 <p>Render <var>vertex-array</var> using <var>shader</var> with the uniform values
 specified in the following keyword arguments.
@@ -125,73 +125,68 @@ specified in the following keyword arguments.
 </dd></dl>
 
 <dl>
-<dt><a name="index-current_002dviewport"></a>Scheme Procedure: <strong>current-viewport</strong></dt>
-<dd><p>Return the currently bound viewport.  See <a href="Viewports.html#Viewports">Viewports</a> for more
-details about using viewports.
+<dt><a name="index-current_002dviewport"></a>Procedure: <strong>current-viewport</strong></dt>
+<dd><p>Return the currently bound viewport (see <a href="Viewports.html#Viewports">Viewports</a>).
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-current_002dframebuffer"></a>Scheme Procedure: <strong>current-framebuffer</strong></dt>
-<dd><p>Return the currently bound framebuffer.  See <a href="Framebuffers.html#Framebuffers">Framebuffers</a> for more
-details about using framebuffers.
+<dt><a name="index-current_002dframebuffer"></a>Procedure: <strong>current-framebuffer</strong></dt>
+<dd><p>Return the currently bound framebuffer (see <a href="Framebuffers.html#Framebuffers">Framebuffers</a>).
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-current_002dblend_002dmode"></a>Scheme Procedure: <strong>current-blend-mode</strong></dt>
-<dd><p>Return the currently bound blend mode.  See <a href="Blending-and-Depth-Testing.html#Blending-and-Depth-Testing">Blending and Depth Testing</a> for more details about using blend modes.
+<dt><a name="index-current_002dblend_002dmode"></a>Procedure: <strong>current-blend-mode</strong></dt>
+<dd><p>Return the currently bound blend mode (see <a href="Blending-and-Depth-Testing.html#Blending-and-Depth-Testing">Blending and Depth Testing</a>).
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-current_002ddepth_002dtest"></a>Scheme Procedure: <strong>current-depth-test</strong></dt>
-<dd><p>Return <code>#t</code> if depth testing is currently enabled.
-See <a href="Blending-and-Depth-Testing.html#Blending-and-Depth-Testing">Blending and Depth Testing</a> for more details about using the
-depth test.
+<dt><a name="index-current_002ddepth_002dtest"></a>Procedure: <strong>current-depth-test</strong></dt>
+<dd><p>Return <code>#t</code> if depth testing is currently enabled (see <a href="Blending-and-Depth-Testing.html#Blending-and-Depth-Testing">Blending and Depth Testing</a>).
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-current_002dtexture"></a>Scheme Procedure: <strong>current-texture</strong></dt>
-<dd><p>Return the currently bound texture.  See <a href="Textures.html#Textures">Textures</a> for more details
-about using textures.
+<dt><a name="index-current_002dtexture"></a>Procedure: <strong>current-texture</strong></dt>
+<dd><p>Return the currently bound texture (see <a href="Textures.html#Textures">Textures</a>).
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-current_002dprojection"></a>Scheme Procedure: <strong>current-projection</strong></dt>
-<dd><p>Return the currently bound projection matrix.  See <a href="Matrices.html#Matrices">Matrices</a> for
-more details about matrices.
+<dt><a name="index-current_002dprojection"></a>Procedure: <strong>current-projection</strong></dt>
+<dd><p>Return the currently bound projection matrix (see <a href="Matrices.html#Matrices">Matrices</a>).
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-with_002dviewport"></a>Scheme Syntax: <strong>with-viewport</strong> <em><var>viewport</var> <var>body</var> ...</em></dt>
-<dd><p>Evaluate <var>body</var> with the current viewport bound to <var>viewport</var>.
+<dt><a name="index-with_002dviewport"></a>Syntax: <strong>with-viewport</strong> <em><var>viewport</var> <var>body</var> ...</em></dt>
+<dd><p>Evaluate <var>body</var> with the current viewport bound to <var>viewport</var> (see <a href="Viewports.html#Viewports">Viewports</a>).
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-with_002dframebuffer"></a>Scheme Syntax: <strong>with-framebuffer</strong> <em><var>framebuffer</var> <var>body</var> ...</em></dt>
+<dt><a name="index-with_002dframebuffer"></a>Syntax: <strong>with-framebuffer</strong> <em><var>framebuffer</var> <var>body</var> ...</em></dt>
 <dd><p>Evaluate <var>body</var> with the current framebuffer bound to
-<var>framebuffer</var>.
+<var>framebuffer</var> (see <a href="Framebuffers.html#Framebuffers">Framebuffers</a>).
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-with_002dblend_002dmode"></a>Scheme Syntax: <strong>with-blend-mode</strong> <em><var>blend-mode</var> <var>body</var> ...</em></dt>
+<dt><a name="index-with_002dblend_002dmode"></a>Syntax: <strong>with-blend-mode</strong> <em><var>blend-mode</var> <var>body</var> ...</em></dt>
 <dd><p>Evaluate <var>body</var> with the current blend mode bound to
-<var>blend-mode</var>.
+<var>blend-mode</var> (see <a href="Blending-and-Depth-Testing.html#Blending-and-Depth-Testing">Blending and Depth Testing</a>).
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-with_002ddepth_002dtest"></a>Scheme Syntax: <strong>with-depth-test</strong> <em><var>depth-test?</var> <var>body</var> ...</em></dt>
+<dt><a name="index-with_002ddepth_002dtest"></a>Syntax: <strong>with-depth-test</strong> <em><var>depth-test?</var> <var>body</var> ...</em></dt>
 <dd><p>Evaluate <var>body</var> with the depth-test disabled if <var>depth-test?</var>
-is <code>#f</code>, or enabled otherwise.
+is <code>#f</code>, or enabled otherwise (see <a href="Blending-and-Depth-Testing.html#Blending-and-Depth-Testing">Blending and Depth Testing</a>).
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-with_002dtexture"></a>Scheme Syntax: <strong>with-texture</strong> <em><var>texture</var> <var>body</var> ...</em></dt>
-<dd><p>Evaluate <var>body</var> with the current texture bound to <var>texture</var>.
+<dt><a name="index-with_002dtexture"></a>Syntax: <strong>with-texture</strong> <em><var>texture</var> <var>body</var> ...</em></dt>
+<dd><p>Evaluate <var>body</var> with the current texture bound to <var>texture</var>
+(see <a href="Textures.html#Textures">Textures</a>).
 </p></dd></dl>
 
 <dl>
-<dt><a name="index-with_002dprojection"></a>Scheme Syntax: <strong>with-projection</strong> <em><var>projection</var> <var>body</var> ...</em></dt>
+<dt><a name="index-with_002dprojection"></a>Syntax: <strong>with-projection</strong> <em><var>projection</var> <var>body</var> ...</em></dt>
 <dd><p>Evaluate <var>body</var> with the current projection matrix bound to
-<var>projection</var>.
+<var>projection</var> (see <a href="Matrices.html#Matrices">Matrices</a>).
 </p></dd></dl>
 
 <hr>
diff --git a/manuals/chickadee/Requirements.html b/manuals/chickadee/Requirements.html
index d3e9918..e860a2f 100644
--- a/manuals/chickadee/Requirements.html
+++ b/manuals/chickadee/Requirements.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Requirements</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Requirements (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Requirements">
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diff --git a/manuals/chickadee/Scripting.html b/manuals/chickadee/Scripting.html
new file mode 100644
index 0000000..dd82e04
--- /dev/null
+++ b/manuals/chickadee/Scripting.html
@@ -0,0 +1,127 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- Copyright (C) 2017  David Thompson davet@gnu.org
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled "GNU
+Free Documentation License".
+
+A copy of the license is also available from the Free Software
+Foundation Web site at http://www.gnu.org/licenses/fdl.html.
+
+
+The document was typeset with
+http://www.texinfo.org/ (GNU Texinfo).
+ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Scripting (The Chickadee Game Toolkit)</title>
+
+<meta name="description" content="Scripting (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Scripting (The Chickadee Game Toolkit)">
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+<meta name="Generator" content="makeinfo">
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+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="API-Reference.html#API-Reference" rel="up" title="API Reference">
+<link href="Agendas.html#Agendas" rel="next" title="Agendas">
+<link href="Viewports.html#Viewports" rel="prev" title="Viewports">
+<style type="text/css">
+<!--
+a.summary-letter {text-decoration: none}
+blockquote.indentedblock {margin-right: 0em}
+blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
+blockquote.smallquotation {font-size: smaller}
+div.display {margin-left: 3.2em}
+div.example {margin-left: 3.2em}
+div.lisp {margin-left: 3.2em}
+div.smalldisplay {margin-left: 3.2em}
+div.smallexample {margin-left: 3.2em}
+div.smalllisp {margin-left: 3.2em}
+kbd {font-style: oblique}
+pre.display {font-family: inherit}
+pre.format {font-family: inherit}
+pre.menu-comment {font-family: serif}
+pre.menu-preformatted {font-family: serif}
+pre.smalldisplay {font-family: inherit; font-size: smaller}
+pre.smallexample {font-size: smaller}
+pre.smallformat {font-family: inherit; font-size: smaller}
+pre.smalllisp {font-size: smaller}
+span.nolinebreak {white-space: nowrap}
+span.roman {font-family: initial; font-weight: normal}
+span.sansserif {font-family: sans-serif; font-weight: normal}
+ul.no-bullet {list-style: none}
+@media (min-width: 1140px) {
+    body {
+        margin-left: 14rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (min-width: 800px) and (max-width: 1140px) {
+    body {
+        margin-left: 6rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (max-width: 800px) {
+    body {
+        margin: 1rem;
+    }
+}
+
+-->
+</style>
+<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
+
+
+</head>
+
+<body lang="en">
+<a name="Scripting"></a>
+<div class="header">
+<p>
+Previous: <a href="Graphics.html#Graphics" accesskey="p" rel="prev">Graphics</a>, Up: <a href="API-Reference.html#API-Reference" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Scripting-1"></a>
+<h3 class="section">2.4 Scripting</h3>
+
+<p>Game logic is a web of asynchronous events that are carefully
+coordinated to bring the game world to life.  In order to make an
+enemy follow and attack the player, or move an NPC back and forth in
+front of the item shop, or do both at the same time, a scripting
+system is a necessity.  Chickadee comes with an asynchronous
+programming system in the <code>(chickadee scripting)</code> module.
+Lightweight, cooperative threads known as &ldquo;scripts&rdquo; allow the
+programmer to write asynchronous code as if it were synchronous, and
+allow many such &ldquo;threads&rdquo; to run concurrently.
+</p>
+<p>But before we dig deeper into scripts, let&rsquo;s discuss the simple act
+of scheduling tasks.
+</p>
+<table class="menu" border="0" cellspacing="0">
+<tr><td align="left" valign="top">&bull; <a href="Agendas.html#Agendas" accesskey="1">Agendas</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Scheduling tasks.
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="Scripts.html#Scripts" accesskey="2">Scripts</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Cooperative multitasking.
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="Tweening.html#Tweening" accesskey="3">Tweening</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Animations.
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="Channels.html#Channels" accesskey="4">Channels</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Publish data to listeners.
+</td></tr>
+</table>
+
+
+
+
+</body>
+</html>
diff --git a/manuals/chickadee/Scripts.html b/manuals/chickadee/Scripts.html
new file mode 100644
index 0000000..c9939f5
--- /dev/null
+++ b/manuals/chickadee/Scripts.html
@@ -0,0 +1,209 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- Copyright (C) 2017  David Thompson davet@gnu.org
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled "GNU
+Free Documentation License".
+
+A copy of the license is also available from the Free Software
+Foundation Web site at http://www.gnu.org/licenses/fdl.html.
+
+
+The document was typeset with
+http://www.texinfo.org/ (GNU Texinfo).
+ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Scripts (The Chickadee Game Toolkit)</title>
+
+<meta name="description" content="Scripts (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Scripts (The Chickadee Game Toolkit)">
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+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Scripting.html#Scripting" rel="up" title="Scripting">
+<link href="Tweening.html#Tweening" rel="next" title="Tweening">
+<link href="Agendas.html#Agendas" rel="prev" title="Agendas">
+<style type="text/css">
+<!--
+a.summary-letter {text-decoration: none}
+blockquote.indentedblock {margin-right: 0em}
+blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
+blockquote.smallquotation {font-size: smaller}
+div.display {margin-left: 3.2em}
+div.example {margin-left: 3.2em}
+div.lisp {margin-left: 3.2em}
+div.smalldisplay {margin-left: 3.2em}
+div.smallexample {margin-left: 3.2em}
+div.smalllisp {margin-left: 3.2em}
+kbd {font-style: oblique}
+pre.display {font-family: inherit}
+pre.format {font-family: inherit}
+pre.menu-comment {font-family: serif}
+pre.menu-preformatted {font-family: serif}
+pre.smalldisplay {font-family: inherit; font-size: smaller}
+pre.smallexample {font-size: smaller}
+pre.smallformat {font-family: inherit; font-size: smaller}
+pre.smalllisp {font-size: smaller}
+span.nolinebreak {white-space: nowrap}
+span.roman {font-family: initial; font-weight: normal}
+span.sansserif {font-family: sans-serif; font-weight: normal}
+ul.no-bullet {list-style: none}
+@media (min-width: 1140px) {
+    body {
+        margin-left: 14rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (min-width: 800px) and (max-width: 1140px) {
+    body {
+        margin-left: 6rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (max-width: 800px) {
+    body {
+        margin: 1rem;
+    }
+}
+
+-->
+</style>
+<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
+
+
+</head>
+
+<body lang="en">
+<a name="Scripts"></a>
+<div class="header">
+<p>
+Next: <a href="Tweening.html#Tweening" accesskey="n" rel="next">Tweening</a>, Previous: <a href="Agendas.html#Agendas" accesskey="p" rel="prev">Agendas</a>, Up: <a href="Scripting.html#Scripting" accesskey="u" rel="up">Scripting</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Scripts-1"></a>
+<h4 class="subsection">2.4.2 Scripts</h4>
+
+<p>Now that we can schedule tasks, let&rsquo;s take things to the next level.
+It sure would be great if we could make procedures that described a
+series of actions that happened over time, especially if we could do
+so without contorting our code into a nest of callback procedures.
+This is where scripts come in.  With scripts we can write code in a
+linear way, in a manner that appears to be synchronous, but with the
+ability to suspend periodically in order to let other scripts have a
+turn and prevent blocking the game loop.  Building on top of the
+scheduling that agendas provide, here is a script that models a child
+trying to get their mother&rsquo;s attention:
+</p>
+<div class="example">
+<pre class="example">(script
+  (while #t
+    (display &quot;mom!&quot;)
+    (newline)
+    (sleep 60))) ; where 60 = 1 second of real time
+</pre></div>
+
+<p>This code runs in an endless loop, but the <code>sleep</code> procedure
+suspends the script and schedules it to be run later by the agenda.
+So, after each iteration of the loop, control is returned back to the
+game loop and the program is not stuck spinning in a loop that will
+never exit.  Pretty neat, eh?
+</p>
+<p>Scripts can suspend to any capable handler, not just the agenda.
+The <code>yield</code> procedure will suspend the current script and pass
+its &ldquo;continuation&rdquo; to a handler procedure.  This handler procedure
+could do anything.  Perhaps the handler stashes the continuation
+somewhere where it will be resumed when the user presses a specific
+key on the keyboard, or maybe it will be resumed when the player picks
+up an item off of the dungeon floor; the sky is the limit.
+</p>
+<p>Sometimes it is necessary to abruptly terminate a script after it has
+been started.  For example, when an enemy is defeated their AI routine
+needs to be shut down.  When a script is spawned, a handle to that
+script is returned that can be used to cancel it when desired.
+</p>
+<div class="example">
+<pre class="example">(define script (script (while #t (display &quot;hey\n&quot;) (sleep 60))))
+;; sometime later
+(cancel-script script)
+</pre></div>
+
+<dl>
+<dt><a name="index-spawn_002dscript"></a>Procedure: <strong>spawn-script</strong> <em><var>thunk</var></em></dt>
+<dd><p>Apply <var>thunk</var> as a script and return a handle to it.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-script"></a>Syntax: <strong>script</strong> <em><var>body</var> &hellip;</em></dt>
+<dd><p>Evaluate <var>body</var> as a script and return a handle to it.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-script_003f"></a>Procedure: <strong>script?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is a script handle.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-script_002dcancelled_003f"></a>Procedure: <strong>script-cancelled?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> has been cancelled.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-script_002drunning_003f"></a>Procedure: <strong>script-running?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> has not yet terminated or been
+cancelled.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-script_002dcomplete_003f"></a>Procedure: <strong>script-complete?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> has terminated.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-cancel_002dscript"></a>Procedure: <strong>cancel-script</strong> <em><var>co</var></em></dt>
+<dd><p>Prevent further execution of the script <var>co</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-yield"></a>Procedure: <strong>yield</strong> <em><var>handler</var></em></dt>
+<dd><p>Suspend the current script and pass its continuation to the
+procedure <var>handler</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-sleep"></a>Procedure: <strong>sleep</strong> <em><var>duration</var></em></dt>
+<dd><p>Wait <var>duration</var> before resuming the current script.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-channel_002dget"></a>Procedure: <strong>channel-get</strong> <em><var>channel</var></em></dt>
+<dd><p>Wait for a message from <var>channel</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-forever"></a>Syntax: <strong>forever</strong> <em><var>body</var> &hellip;</em></dt>
+<dd><p>Evaluate <var>body</var> in an endless loop.
+</p></dd></dl>
+
+<hr>
+<div class="header">
+<p>
+Next: <a href="Tweening.html#Tweening" accesskey="n" rel="next">Tweening</a>, Previous: <a href="Agendas.html#Agendas" accesskey="p" rel="prev">Agendas</a>, Up: <a href="Scripting.html#Scripting" accesskey="u" rel="up">Scripting</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+
+
+
+</body>
+</html>
diff --git a/manuals/chickadee/Shaders.html b/manuals/chickadee/Shaders.html
index 7b3a2a0..70173a4 100644
--- a/manuals/chickadee/Shaders.html
+++ b/manuals/chickadee/Shaders.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Shaders</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Shaders (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Shaders">
-<meta name="keywords" content="The Chickadee Game Toolkit: Shaders">
+<meta name="description" content="Shaders (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Shaders (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
@@ -94,7 +94,7 @@ Next: <a href="Framebuffers.html#Framebuffers" accesskey="n" rel="next">Framebuf
 </div>
 <hr>
 <a name="Shaders-1"></a>
-<h4 class="subsection">2.4.8 Shaders</h4>
+<h4 class="subsection">2.3.9 Shaders</h4>
 
 <p>Shaders are programs for the GPU to evaluate.  They are written in the
 OpenGL Shading Language, or GLSL.  Chickadee does not currently
diff --git a/manuals/chickadee/Sprites.html b/manuals/chickadee/Sprites.html
index 0c114bd..29d16ea 100644
--- a/manuals/chickadee/Sprites.html
+++ b/manuals/chickadee/Sprites.html
@@ -16,21 +16,21 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Sprites</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Sprites (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Sprites">
-<meta name="keywords" content="The Chickadee Game Toolkit: Sprites">
+<meta name="description" content="Sprites (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Sprites (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
 <link href="Graphics.html#Graphics" rel="up" title="Graphics">
-<link href="Lines-and-Shapes.html#Lines-and-Shapes" rel="next" title="Lines and Shapes">
+<link href="Tile-Maps.html#Tile-Maps" rel="next" title="Tile Maps">
 <link href="Textures.html#Textures" rel="prev" title="Textures">
 <style type="text/css">
 <!--
@@ -90,11 +90,11 @@ ul.no-bullet {list-style: none}
 <a name="Sprites"></a>
 <div class="header">
 <p>
-Next: <a href="Lines-and-Shapes.html#Lines-and-Shapes" accesskey="n" rel="next">Lines and Shapes</a>, Previous: <a href="Textures.html#Textures" accesskey="p" rel="prev">Textures</a>, Up: <a href="Graphics.html#Graphics" accesskey="u" rel="up">Graphics</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+Next: <a href="Tile-Maps.html#Tile-Maps" accesskey="n" rel="next">Tile Maps</a>, Previous: <a href="Textures.html#Textures" accesskey="p" rel="prev">Textures</a>, Up: <a href="Graphics.html#Graphics" accesskey="u" rel="up">Graphics</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
 </div>
 <hr>
 <a name="Sprites-1"></a>
-<h4 class="subsection">2.4.3 Sprites</h4>
+<h4 class="subsection">2.3.3 Sprites</h4>
 
 <p>For those who are new to this game, a sprite is a 2D rectangular
 bitmap that is rendered to the screen.  For 2D games, sprites are the
@@ -104,8 +104,25 @@ stored in textures (see <a href="Textures.html#Textures">Textures</a>) and can b
 via the <code>draw-sprite</code> procedure.
 </p>
 <dl>
-<dt><a name="index-draw_002dsprite"></a>Scheme Procedure: <strong>draw-sprite</strong> <em><var>texture</var> <var>region</var>        [#:scale] [#:rotation] [#:blend-mode alpha] [#:texture-region]        [#:shader]</em></dt>
-</dl>
+<dt><a name="index-draw_002dsprite"></a>Procedure: <strong>draw-sprite</strong> <em><var>texture</var> <var>position</var>        [#:origin] [#:scale] [#:rotation] [#:blend-mode alpha]        [#:rect] [#:shader]</em></dt>
+<dd>
+<p>Draw <var>texture</var> at <var>position</var>.
+</p>
+<p>Optionally, other transformations may be applied to the sprite.
+<var>rotation</var> specifies the angle to rotate the sprite, in radians.
+<var>scale</var> specifies the scaling factor as a 2D vector.  All
+transformations are applied relative to <var>origin</var>, a 2D vector,
+which defaults to the lower-left corner.
+</p>
+<p>Alpha blending is used by default but the blending method can be
+changed by specifying <var>blend-mode</var>.
+</p>
+<p>The area drawn to is as big as the texture, by default.  To draw to an
+arbitrary section of the screen, specify <var>rect</var>.
+</p>
+<p>Finally, advanced users may specify <var>shader</var> to change the way the
+sprite is rendered entirely.
+</p></dd></dl>
 
 <p>It&rsquo;s not uncommon to need to draw hundreds or thousands of sprites
 each frame.  However, GPUs (graphics processing units) are tricky
@@ -129,7 +146,7 @@ the code that is calling <code>draw-sprite</code> a lot in the
 <code>with-batched-sprites</code> form.
 </p>
 <dl>
-<dt><a name="index-with_002dbatched_002dsprites"></a>Scheme Syntax: <strong>with-batched-sprites</strong> <em><var>body</var> &hellip;</em></dt>
+<dt><a name="index-with_002dbatched_002dsprites"></a>Syntax: <strong>with-batched-sprites</strong> <em><var>body</var> &hellip;</em></dt>
 <dd><p>Use batched rendering for all <code>draw-sprite</code> calls within
 <var>body</var>.
 </p></dd></dl>
@@ -158,7 +175,7 @@ patch, they can be rendered at any size without unappealing scaling
 artifacts.
 </p>
 <dl>
-<dt><a name="index-draw_002dnine_002dpatch"></a>Scheme Procedure: <strong>draw-nine-patch</strong> <em><var>texture</var> <var>region</var>        [#:margin 0] [#:top-margin margin] [#:bottom-margin margin]        [#:left-margin margin] [#:right-margin margin]        [#:texture-region] [#:scale] [#:rotation] [#:blend-mode alpha]        [#:shader]</em></dt>
+<dt><a name="index-draw_002dnine_002dpatch"></a>Procedure: <strong>draw-nine-patch</strong> <em><var>texture</var> <var>rect</var>        [#:margin 0] [#:top-margin margin] [#:bottom-margin margin]        [#:left-margin margin] [#:right-margin margin]        [#:origin] [#:scale] [#:rotation] [#:blend-mode alpha]        [#:shader]</em></dt>
 <dd>
 <p>Draw a nine patch sprite.  A nine patch sprite renders <var>texture</var>
 as a <var>width</var> x <var>height</var> rectangle whose stretchable areas are
@@ -174,7 +191,7 @@ the other arguments.
 <hr>
 <div class="header">
 <p>
-Next: <a href="Lines-and-Shapes.html#Lines-and-Shapes" accesskey="n" rel="next">Lines and Shapes</a>, Previous: <a href="Textures.html#Textures" accesskey="p" rel="prev">Textures</a>, Up: <a href="Graphics.html#Graphics" accesskey="u" rel="up">Graphics</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+Next: <a href="Tile-Maps.html#Tile-Maps" accesskey="n" rel="next">Tile Maps</a>, Previous: <a href="Textures.html#Textures" accesskey="p" rel="prev">Textures</a>, Up: <a href="Graphics.html#Graphics" accesskey="u" rel="up">Graphics</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
 </div>
 
 
diff --git a/manuals/chickadee/Textures.html b/manuals/chickadee/Textures.html
index 66d9fe7..b9bb778 100644
--- a/manuals/chickadee/Textures.html
+++ b/manuals/chickadee/Textures.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Textures</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Textures (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Textures">
-<meta name="keywords" content="The Chickadee Game Toolkit: Textures">
+<meta name="description" content="Textures (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Textures (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
@@ -94,10 +94,10 @@ Next: <a href="Sprites.html#Sprites" accesskey="n" rel="next">Sprites</a>, Previ
 </div>
 <hr>
 <a name="Textures-1"></a>
-<h4 class="subsection">2.4.2 Textures</h4>
+<h4 class="subsection">2.3.2 Textures</h4>
 
 <dl>
-<dt><a name="index-load_002dimage"></a>Scheme Procedure: <strong>load-image</strong> <em><var>file</var> [#:min-filter nearest]        [#:mag-filter nearest] [#:wrap-s repeat] [#:wrap-t repeat]</em></dt>
+<dt><a name="index-load_002dimage"></a>Procedure: <strong>load-image</strong> <em><var>file</var> [#:min-filter nearest]        [#:mag-filter nearest] [#:wrap-s repeat] [#:wrap-t repeat]</em></dt>
 <dd>
 <p>Load the image data from <var>file</var> and return a new texture object.
 </p>
diff --git a/manuals/chickadee/Tile-Maps.html b/manuals/chickadee/Tile-Maps.html
new file mode 100644
index 0000000..cdf4f6e
--- /dev/null
+++ b/manuals/chickadee/Tile-Maps.html
@@ -0,0 +1,126 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- Copyright (C) 2017  David Thompson davet@gnu.org
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled "GNU
+Free Documentation License".
+
+A copy of the license is also available from the Free Software
+Foundation Web site at http://www.gnu.org/licenses/fdl.html.
+
+
+The document was typeset with
+http://www.texinfo.org/ (GNU Texinfo).
+ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Tile Maps (The Chickadee Game Toolkit)</title>
+
+<meta name="description" content="Tile Maps (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Tile Maps (The Chickadee Game Toolkit)">
+<meta name="resource-type" content="document">
+<meta name="distribution" content="global">
+<meta name="Generator" content="makeinfo">
+<link href="index.html#Top" rel="start" title="Top">
+<link href="Index.html#Index" rel="index" title="Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Graphics.html#Graphics" rel="up" title="Graphics">
+<link href="Lines-and-Shapes.html#Lines-and-Shapes" rel="next" title="Lines and Shapes">
+<link href="Sprites.html#Sprites" rel="prev" title="Sprites">
+<style type="text/css">
+<!--
+a.summary-letter {text-decoration: none}
+blockquote.indentedblock {margin-right: 0em}
+blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
+blockquote.smallquotation {font-size: smaller}
+div.display {margin-left: 3.2em}
+div.example {margin-left: 3.2em}
+div.lisp {margin-left: 3.2em}
+div.smalldisplay {margin-left: 3.2em}
+div.smallexample {margin-left: 3.2em}
+div.smalllisp {margin-left: 3.2em}
+kbd {font-style: oblique}
+pre.display {font-family: inherit}
+pre.format {font-family: inherit}
+pre.menu-comment {font-family: serif}
+pre.menu-preformatted {font-family: serif}
+pre.smalldisplay {font-family: inherit; font-size: smaller}
+pre.smallexample {font-size: smaller}
+pre.smallformat {font-family: inherit; font-size: smaller}
+pre.smalllisp {font-size: smaller}
+span.nolinebreak {white-space: nowrap}
+span.roman {font-family: initial; font-weight: normal}
+span.sansserif {font-family: sans-serif; font-weight: normal}
+ul.no-bullet {list-style: none}
+@media (min-width: 1140px) {
+    body {
+        margin-left: 14rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (min-width: 800px) and (max-width: 1140px) {
+    body {
+        margin-left: 6rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (max-width: 800px) {
+    body {
+        margin: 1rem;
+    }
+}
+
+-->
+</style>
+<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
+
+
+</head>
+
+<body lang="en">
+<a name="Tile-Maps"></a>
+<div class="header">
+<p>
+Next: <a href="Lines-and-Shapes.html#Lines-and-Shapes" accesskey="n" rel="next">Lines and Shapes</a>, Previous: <a href="Sprites.html#Sprites" accesskey="p" rel="prev">Sprites</a>, Up: <a href="Graphics.html#Graphics" accesskey="u" rel="up">Graphics</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Tile-Maps-1"></a>
+<h4 class="subsection">2.3.4 Tile Maps</h4>
+
+<p>A tile map is a scene created by composing lots of small sprites,
+called &ldquo;tiles&rdquo;, into a larger image.  One program for editing such
+maps is called <a href="http://mapeditor.org">Tiled</a>.  Chickadee has native
+support for loading and rendering Tiled maps in the <code>(chickadee
+render tiled)</code> module.
+</p>
+<dl>
+<dt><a name="index-load_002dtile_002dmap"></a>Procedure: <strong>load-tile-map</strong> <em><var>file-name</var></em></dt>
+<dd><p>Load the Tiled formatted map in <var>file-name</var> and return a new tile
+map object.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-draw_002dtile_002dmap"></a>Procedure: <strong>draw-tile-map</strong> <em><var>tile-map</var> [#:layers] [#:region]        [#:origin] [#:position] [#:scale] [#:rotation]</em></dt>
+<dd>
+<p>Draw the layers of <var>tile-map</var>.  By default, all layers are drawn.
+To draw a subset of the available layers, pass a list of layer ids
+using the <var>layers</var> keyword argument.
+</p>
+<p>Refer to <code>draw-sprite</code> (see <a href="Sprites.html#Sprites">Sprites</a>) for information about
+the other arguments.
+</p></dd></dl>
+
+
+
+
+</body>
+</html>
diff --git a/manuals/chickadee/Tweening.html b/manuals/chickadee/Tweening.html
new file mode 100644
index 0000000..3e344df
--- /dev/null
+++ b/manuals/chickadee/Tweening.html
@@ -0,0 +1,132 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- Copyright (C) 2017  David Thompson davet@gnu.org
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled "GNU
+Free Documentation License".
+
+A copy of the license is also available from the Free Software
+Foundation Web site at http://www.gnu.org/licenses/fdl.html.
+
+
+The document was typeset with
+http://www.texinfo.org/ (GNU Texinfo).
+ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Tweening (The Chickadee Game Toolkit)</title>
+
+<meta name="description" content="Tweening (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Tweening (The Chickadee Game Toolkit)">
+<meta name="resource-type" content="document">
+<meta name="distribution" content="global">
+<meta name="Generator" content="makeinfo">
+<link href="index.html#Top" rel="start" title="Top">
+<link href="Index.html#Index" rel="index" title="Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Scripting.html#Scripting" rel="up" title="Scripting">
+<link href="Channels.html#Channels" rel="next" title="Channels">
+<link href="Scripts.html#Scripts" rel="prev" title="Scripts">
+<style type="text/css">
+<!--
+a.summary-letter {text-decoration: none}
+blockquote.indentedblock {margin-right: 0em}
+blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
+blockquote.smallquotation {font-size: smaller}
+div.display {margin-left: 3.2em}
+div.example {margin-left: 3.2em}
+div.lisp {margin-left: 3.2em}
+div.smalldisplay {margin-left: 3.2em}
+div.smallexample {margin-left: 3.2em}
+div.smalllisp {margin-left: 3.2em}
+kbd {font-style: oblique}
+pre.display {font-family: inherit}
+pre.format {font-family: inherit}
+pre.menu-comment {font-family: serif}
+pre.menu-preformatted {font-family: serif}
+pre.smalldisplay {font-family: inherit; font-size: smaller}
+pre.smallexample {font-size: smaller}
+pre.smallformat {font-family: inherit; font-size: smaller}
+pre.smalllisp {font-size: smaller}
+span.nolinebreak {white-space: nowrap}
+span.roman {font-family: initial; font-weight: normal}
+span.sansserif {font-family: sans-serif; font-weight: normal}
+ul.no-bullet {list-style: none}
+@media (min-width: 1140px) {
+    body {
+        margin-left: 14rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (min-width: 800px) and (max-width: 1140px) {
+    body {
+        margin-left: 6rem;
+        margin-right: 4rem;
+        max-width: 52rem;
+    }
+}
+
+@media (max-width: 800px) {
+    body {
+        margin: 1rem;
+    }
+}
+
+-->
+</style>
+<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
+
+
+</head>
+
+<body lang="en">
+<a name="Tweening"></a>
+<div class="header">
+<p>
+Next: <a href="Channels.html#Channels" accesskey="n" rel="next">Channels</a>, Previous: <a href="Scripts.html#Scripts" accesskey="p" rel="prev">Scripts</a>, Up: <a href="Scripting.html#Scripting" accesskey="u" rel="up">Scripting</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Tweening-1"></a>
+<h4 class="subsection">2.4.3 Tweening</h4>
+
+<p>Tweening is the process of transitioning something from an initial
+state to a final state over a pre-determined period of time.  In other
+words, tweening is a way to create animation.  The <code>tween</code>
+procedure can be used within any script like so:
+</p>
+<div class="example">
+<pre class="example">(define x 0)
+(script
+  ;; 0 to 100 in 60 ticks of the agenda.
+  (tween 60 0 100 (lambda (y) (set! x y))))
+</pre></div>
+
+<dl>
+<dt><a name="index-tween"></a>Procedure: <strong>tween</strong> <em><var>duration</var> <var>start</var> <var>end</var> <var>proc</var> [#:step 1 #:ease <code>smoothstep</code> #:interpolate <code>lerp</code>]</em></dt>
+<dd><p>Transition a value from <var>start</var> to <var>end</var> over <var>duration</var>,
+sending each succesive value to <var>proc</var>.  <var>step</var> controls the
+amount of time between each update of the animation.
+</p>
+<p>To control how the animation goes from the initial to final state, an
+&ldquo;easing&rdquo; procedure may be specified.  By default, the
+<code>smoothstep</code> easing is used, which is a more pleasing default
+than a simplistic linear function.  See <a href="Easings.html#Easings">Easings</a> for a complete list
+of available easing procedures.
+</p>
+<p>The <var>interpolate</var> procedure computes the values in between
+<var>start</var> and <var>end</var>.  By default, linear interpolation (&ldquo;lerp&rdquo;
+for short) is used.
+</p></dd></dl>
+
+
+
+
+</body>
+</html>
diff --git a/manuals/chickadee/Vectors.html b/manuals/chickadee/Vectors.html
index eb79149..4857f0a 100644
--- a/manuals/chickadee/Vectors.html
+++ b/manuals/chickadee/Vectors.html
@@ -16,22 +16,22 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Vectors</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Vectors (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Vectors">
-<meta name="keywords" content="The Chickadee Game Toolkit: Vectors">
+<meta name="description" content="Vectors (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Vectors (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
 <link href="Math.html#Math" rel="up" title="Math">
-<link href="Matrices.html#Matrices" rel="next" title="Matrices">
-<link href="Math.html#Math" rel="prev" title="Math">
+<link href="Rectangles.html#Rectangles" rel="next" title="Rectangles">
+<link href="Basics.html#Basics" rel="prev" title="Basics">
 <style type="text/css">
 <!--
 a.summary-letter {text-decoration: none}
@@ -90,12 +90,255 @@ ul.no-bullet {list-style: none}
 <a name="Vectors"></a>
 <div class="header">
 <p>
-Next: <a href="Matrices.html#Matrices" accesskey="n" rel="next">Matrices</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+Next: <a href="Rectangles.html#Rectangles" accesskey="n" rel="next">Rectangles</a>, Previous: <a href="Basics.html#Basics" accesskey="p" rel="prev">Basics</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
 </div>
 <hr>
 <a name="Vectors-1"></a>
-<h4 class="subsection">2.3.1 Vectors</h4>
+<h4 class="subsection">2.2.2 Vectors</h4>
+
+<p>Unlike Scheme&rsquo;s vector data type, which is a sequence of arbitrary
+Scheme objects, Chickadee&rsquo;s <code>(chickadee math vector)</code> module
+provides vectors in the linear algebra sense: Sequences of numbers
+specialized for particular coordinate spaces.  As of now, Chickadee
+provides 2D and 3D vectors, with 4D vector support coming in a future
+release.
+</p>
+<p>Here&rsquo;s a quick example of adding two vectors:
+</p>
+<div class="example">
+<pre class="example">(define v (vec2+ (vec2 1 2) (vec2 3 4)))
+</pre></div>
+
+<p>Since vectors are used so frequently, the reader macro <code>#v</code> is
+used to cut down on typing:
+</p>
+<div class="example">
+<pre class="example">(define v (vec2+ #v(1 2) #v(3 4)))
+</pre></div>
+
+<a name="A-Note-About-Performance"></a>
+<h4 class="subsubsection">2.2.2.1 A Note About Performance</h4>
+
+<p>A lot of time has been spent making Chickadee&rsquo;s vector operations
+perform relatively efficiently in critical code paths where excessive
+garbage generation will cause major performance issues.  The general
+rule is that procedures ending with <code>!</code> perform an in-place
+modification of one of the arguments in order to avoid allocating a
+new vector.  These procedures are also inlined by Guile&rsquo;s compiler in
+order to take advantage of optimizations relating to floating point
+math operations.  The downside is that since these are not pure
+functions, they do not compose well and create more verbose code.
+</p>
+<a name="g_t2D-Vectors"></a>
+<h4 class="subsubsection">2.2.2.2 2D Vectors</h4>
+
+<dl>
+<dt><a name="index-vec2"></a>Procedure: <strong>vec2</strong> <em><var>x</var> <var>y</var></em></dt>
+<dd><p>Return a new 2D vector with coordinates (<var>x</var>, <var>y</var>).
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002fpolar"></a>Procedure: <strong>vec2/polar</strong> <em><var>r</var> <var>theta</var></em></dt>
+<dd><p>Return a new 2D vector containing the Cartesian representation of the
+polar coordinate (<var>r</var>, <var>theta</var>).  The angle <var>theta</var> is
+measured in radians.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_003f"></a>Procedure: <strong>vec2?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is a 2D vector.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002dx"></a>Procedure: <strong>vec2-x</strong> <em><var>v</var></em></dt>
+<dd><p>Return the X coordinate of the 2D vector <var>v</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002dy"></a>Procedure: <strong>vec2-y</strong> <em><var>v</var></em></dt>
+<dd><p>Return the Y coordinate of the 2D vector <var>v</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002dcopy"></a>Procedure: <strong>vec2-copy</strong> <em><var>v</var></em></dt>
+<dd><p>Return a fresh copy of the 2D vector <var>v</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002dmagnitude"></a>Procedure: <strong>vec2-magnitude</strong> <em><var>v</var></em></dt>
+<dd><p>Return the magnitude of the 2D vector <var>v</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002ddot_002dproduct"></a>Procedure: <strong>vec2-dot-product</strong> <em><var>v1</var> <var>v2</var></em></dt>
+<dd><p>Return the dot product of the 2D vectors <var>v1</var> and <var>v2</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002dnormalize"></a>Procedure: <strong>vec2-normalize</strong> <em><var>v</var></em></dt>
+<dd><p>Return the normalized form of the 2D vector <var>v</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002b"></a>Procedure: <strong>vec2+</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Add <var>x</var>, either a 2D vector or a scalar (i.e. a real number), to
+the 2D vector <var>v</var> and return a new vector containing the sum.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002d"></a>Procedure: <strong>vec2-</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Subtract <var>x</var>, either a 2D vector or a scalar, from the 2D vector
+<var>v</var> and return a new vector containing the difference.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002a"></a>Procedure: <strong>vec2*</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Multiply the 2D vector <var>v</var> by <var>x</var>, a 2D vector or a scalar,
+and return a new vector containing the product.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-set_002dvec2_002dx_0021"></a>Procedure: <strong>set-vec2-x!</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Set the X coordinate of the 2D vector <var>v</var> to <var>x</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-set_002dvec2_002dy_0021"></a>Procedure: <strong>set-vec2-y!</strong> <em><var>v</var> <var>y</var></em></dt>
+<dd><p>Set the Y coordinate of the 2D vector <var>v</var> to <var>y</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002dcopy_0021"></a>Procedure: <strong>vec2-copy!</strong> <em><var>source</var> <var>target</var></em></dt>
+<dd><p>Copy the 2D vector <var>source</var> into the 2D vector <var>target</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002dadd_0021"></a>Procedure: <strong>vec2-add!</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Perform an in-place modification of the 2D vector <var>v</var> by adding
+<var>x</var>, a 2D vector or a scalar.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002dsub_0021"></a>Procedure: <strong>vec2-sub!</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Perform an in-place modification of the 2D vector <var>v</var> by
+subtracting <var>x</var>, a 2D vector or a scalar.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec2_002dmult_0021"></a>Procedure: <strong>vec2-mult!</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Perform an in-place modification of the 2D vector <var>v</var> by
+multiplying it by <var>x</var>, a 2D vector or a scalar.
+</p></dd></dl>
 
+<a name="g_t3D-Vectors"></a>
+<h4 class="subsubsection">2.2.2.3 3D Vectors</h4>
+
+<dl>
+<dt><a name="index-vec3"></a>Procedure: <strong>vec3</strong> <em><var>x</var> <var>y</var></em></dt>
+<dd><p>Return a new 2D vector with coordinates (<var>x</var>, <var>y</var>).
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_003f"></a>Procedure: <strong>vec3?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <var>obj</var> is a 3D vector.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002dx"></a>Procedure: <strong>vec3-x</strong> <em><var>v</var></em></dt>
+<dd><p>Return the X coordinate of the 3D vector <var>v</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002dy"></a>Procedure: <strong>vec3-y</strong> <em><var>v</var></em></dt>
+<dd><p>Return the Y coordinate of the 3D vector <var>v</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002dz"></a>Procedure: <strong>vec3-z</strong> <em><var>v</var></em></dt>
+<dd><p>Return the Z coordinate of the 3D vector <var>v</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002dcopy"></a>Procedure: <strong>vec3-copy</strong> <em><var>v</var></em></dt>
+<dd><p>Return a fresh copy of the 3D vector <var>v</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002dmagnitude"></a>Procedure: <strong>vec3-magnitude</strong> <em><var>v</var></em></dt>
+<dd><p>Return the magnitude of the 3D vector <var>v</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002ddot_002dproduct"></a>Procedure: <strong>vec3-dot-product</strong> <em><var>v1</var> <var>v2</var></em></dt>
+<dd><p>Return the dot product of the 3D vectors <var>v1</var> and <var>v2</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002dnormalize"></a>Procedure: <strong>vec3-normalize</strong> <em><var>v</var></em></dt>
+<dd><p>Return the normalized form of the 3D vector <var>v</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002b"></a>Procedure: <strong>vec3+</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Add <var>x</var>, either a 3D vector or a scalar (i.e. a real number), to
+the 3D vector <var>v</var> and return a new vector containing the sum.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002d"></a>Procedure: <strong>vec3-</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Subtract <var>x</var>, either a 3D vector or a scalar, from the 3D vector
+<var>v</var> and return a new vector containing the difference.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002a"></a>Procedure: <strong>vec3*</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Multiply the 3D vector <var>v</var> by <var>x</var>, a 3D vector or a scalar,
+and return a new vector containing the product.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-set_002dvec3_002dx_0021"></a>Procedure: <strong>set-vec3-x!</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Set the X coordinate of the 3D vector <var>v</var> to <var>x</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-set_002dvec3_002dy_0021"></a>Procedure: <strong>set-vec3-y!</strong> <em><var>v</var> <var>y</var></em></dt>
+<dd><p>Set the Y coordinate of the 3D vector <var>v</var> to <var>y</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-set_002dvec3_002dz_0021"></a>Procedure: <strong>set-vec3-z!</strong> <em><var>v</var> <var>z</var></em></dt>
+<dd><p>Set the Z coordinate of the 3D vector <var>v</var> to <var>z</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002dcopy_0021"></a>Procedure: <strong>vec3-copy!</strong> <em><var>source</var> <var>target</var></em></dt>
+<dd><p>Copy the 3D vector <var>source</var> into the 3D vector <var>target</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002dadd_0021"></a>Procedure: <strong>vec3-add!</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Perform an in-place modification of the 3D vector <var>v</var> by adding
+<var>x</var>, a 3D vector or a scalar.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002dsub_0021"></a>Procedure: <strong>vec3-sub!</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Perform an in-place modification of the 3D vector <var>v</var> by
+subtracting <var>x</var>, a 3D vector or a scalar.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-vec3_002dmult_0021"></a>Procedure: <strong>vec3-mult!</strong> <em><var>v</var> <var>x</var></em></dt>
+<dd><p>Perform an in-place modification of the 3D vector <var>v</var> by
+multiplying it by <var>x</var>, a 3D vector or a scalar.
+</p></dd></dl>
+
+<hr>
+<div class="header">
+<p>
+Next: <a href="Rectangles.html#Rectangles" accesskey="n" rel="next">Rectangles</a>, Previous: <a href="Basics.html#Basics" accesskey="p" rel="prev">Basics</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
 
 
 
diff --git a/manuals/chickadee/Vertex-Arrays.html b/manuals/chickadee/Vertex-Arrays.html
index 9b3f5b1..f3c9fa6 100644
--- a/manuals/chickadee/Vertex-Arrays.html
+++ b/manuals/chickadee/Vertex-Arrays.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Vertex Arrays</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Vertex Arrays (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Vertex Arrays">
-<meta name="keywords" content="The Chickadee Game Toolkit: Vertex Arrays">
+<meta name="description" content="Vertex Arrays (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Vertex Arrays (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
@@ -94,7 +94,7 @@ Next: <a href="Shaders.html#Shaders" accesskey="n" rel="next">Shaders</a>, Previ
 </div>
 <hr>
 <a name="Vertex-Arrays-1"></a>
-<h4 class="subsection">2.4.7 Vertex Arrays</h4>
+<h4 class="subsection">2.3.8 Vertex Arrays</h4>
 
 
 
diff --git a/manuals/chickadee/Viewports.html b/manuals/chickadee/Viewports.html
index c54e7c9..2e46d12 100644
--- a/manuals/chickadee/Viewports.html
+++ b/manuals/chickadee/Viewports.html
@@ -16,21 +16,21 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Viewports</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Viewports (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Viewports">
-<meta name="keywords" content="The Chickadee Game Toolkit: Viewports">
+<meta name="description" content="Viewports (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Viewports (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="index.html#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
 <link href="Graphics.html#Graphics" rel="up" title="Graphics">
-<link href="Audio.html#Audio" rel="next" title="Audio">
+<link href="Scripting.html#Scripting" rel="next" title="Scripting">
 <link href="Framebuffers.html#Framebuffers" rel="prev" title="Framebuffers">
 <style type="text/css">
 <!--
@@ -94,7 +94,7 @@ Previous: <a href="Framebuffers.html#Framebuffers" accesskey="p" rel="prev">Fram
 </div>
 <hr>
 <a name="Viewports-1"></a>
-<h4 class="subsection">2.4.10 Viewports</h4>
+<h4 class="subsection">2.3.11 Viewports</h4>
 
 
 
diff --git a/manuals/chickadee/index.html b/manuals/chickadee/index.html
index b10ea67..d7e8a56 100644
--- a/manuals/chickadee/index.html
+++ b/manuals/chickadee/index.html
@@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html.
 The document was typeset with
 http://www.texinfo.org/ (GNU Texinfo).
  -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
 <head>
-<title>The Chickadee Game Toolkit: Top</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Top (The Chickadee Game Toolkit)</title>
 
-<meta name="description" content="The Chickadee Game Toolkit: Top">
-<meta name="keywords" content="The Chickadee Game Toolkit: Top">
+<meta name="description" content="Top (The Chickadee Game Toolkit)">
+<meta name="keywords" content="Top (The Chickadee Game Toolkit)">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="#Top" rel="start" title="Top">
 <link href="Index.html#Index" rel="index" title="Index">
 <link href="#SEC_Contents" rel="contents" title="Table of Contents">
@@ -102,27 +102,48 @@ ul.no-bullet {list-style: none}
   <li><a name="toc-API-Reference-1" href="API-Reference.html#API-Reference">2 API Reference</a>
   <ul class="no-bullet">
     <li><a name="toc-Kernel-1" href="Kernel.html#Kernel">2.1 Kernel</a></li>
-    <li><a name="toc-Input-1" href="Input.html#Input">2.2 Input</a></li>
-    <li><a name="toc-Math-1" href="Math.html#Math">2.3 Math</a>
+    <li><a name="toc-Math-1" href="Math.html#Math">2.2 Math</a>
+    <ul class="no-bullet">
+      <li><a name="toc-Basics-1" href="Basics.html#Basics">2.2.1 Basics</a></li>
+      <li><a name="toc-Vectors-1" href="Vectors.html#Vectors">2.2.2 Vectors</a>
+      <ul class="no-bullet">
+        <li><a name="toc-A-Note-About-Performance" href="Vectors.html#A-Note-About-Performance">2.2.2.1 A Note About Performance</a></li>
+        <li><a name="toc-2D-Vectors" href="Vectors.html#g_t2D-Vectors">2.2.2.2 2D Vectors</a></li>
+        <li><a name="toc-3D-Vectors" href="Vectors.html#g_t3D-Vectors">2.2.2.3 3D Vectors</a></li>
+      </ul></li>
+      <li><a name="toc-Rectangles-1" href="Rectangles.html#Rectangles">2.2.3 Rectangles</a></li>
+      <li><a name="toc-Grid-1" href="Grid.html#Grid">2.2.4 Grid</a></li>
+      <li><a name="toc-Matrices-1" href="Matrices.html#Matrices">2.2.5 Matrices</a>
+      <ul class="no-bullet">
+        <li><a name="toc-Another-Note-About-Performance" href="Matrices.html#Another-Note-About-Performance">2.2.5.1 Another Note About Performance</a></li>
+        <li><a name="toc-Matrix-Operations" href="Matrices.html#Matrix-Operations">2.2.5.2 Matrix Operations</a></li>
+      </ul></li>
+      <li><a name="toc-Quaternions-1" href="Quaternions.html#Quaternions">2.2.6 Quaternions</a></li>
+      <li><a name="toc-Easings-1" href="Easings.html#Easings">2.2.7 Easings</a></li>
+      <li><a name="toc-Bezier-Curves-1" href="Bezier-Curves.html#Bezier-Curves">2.2.8 Bezier Curves</a></li>
+      <li><a name="toc-Path-Finding-1" href="Path-Finding.html#Path-Finding">2.2.9 Path Finding</a></li>
+    </ul></li>
+    <li><a name="toc-Graphics-1" href="Graphics.html#Graphics">2.3 Graphics</a>
     <ul class="no-bullet">
-      <li><a name="toc-Vectors-1" href="Vectors.html#Vectors">2.3.1 Vectors</a></li>
-      <li><a name="toc-Matrices-1" href="Matrices.html#Matrices">2.3.2 Matrices</a></li>
-      <li><a name="toc-Rectangles-1" href="Rectangles.html#Rectangles">2.3.3 Rectangles</a></li>
+      <li><a name="toc-Rendering-Engine-1" href="Rendering-Engine.html#Rendering-Engine">2.3.1 Rendering Engine</a></li>
+      <li><a name="toc-Textures-1" href="Textures.html#Textures">2.3.2 Textures</a></li>
+      <li><a name="toc-Sprites-1" href="Sprites.html#Sprites">2.3.3 Sprites</a></li>
+      <li><a name="toc-Tile-Maps-1" href="Tile-Maps.html#Tile-Maps">2.3.4 Tile Maps</a></li>
+      <li><a name="toc-Lines-and-Shapes-1" href="Lines-and-Shapes.html#Lines-and-Shapes">2.3.5 Lines and Shapes</a></li>
+      <li><a name="toc-Fonts-1" href="Fonts.html#Fonts">2.3.6 Fonts</a></li>
+      <li><a name="toc-Blending-and-Depth-Testing-1" href="Blending-and-Depth-Testing.html#Blending-and-Depth-Testing">2.3.7 Blending and Depth Testing</a></li>
+      <li><a name="toc-Vertex-Arrays-1" href="Vertex-Arrays.html#Vertex-Arrays">2.3.8 Vertex Arrays</a></li>
+      <li><a name="toc-Shaders-1" href="Shaders.html#Shaders">2.3.9 Shaders</a></li>
+      <li><a name="toc-Framebuffers-1" href="Framebuffers.html#Framebuffers">2.3.10 Framebuffers</a></li>
+      <li><a name="toc-Viewports-1" href="Viewports.html#Viewports">2.3.11 Viewports</a></li>
     </ul></li>
-    <li><a name="toc-Graphics-1" href="Graphics.html#Graphics">2.4 Graphics</a>
+    <li><a name="toc-Scripting-1" href="Scripting.html#Scripting">2.4 Scripting</a>
     <ul class="no-bullet">
-      <li><a name="toc-Rendering-Engine-1" href="Rendering-Engine.html#Rendering-Engine">2.4.1 Rendering Engine</a></li>
-      <li><a name="toc-Textures-1" href="Textures.html#Textures">2.4.2 Textures</a></li>
-      <li><a name="toc-Sprites-1" href="Sprites.html#Sprites">2.4.3 Sprites</a></li>
-      <li><a name="toc-Lines-and-Shapes-1" href="Lines-and-Shapes.html#Lines-and-Shapes">2.4.4 Lines and Shapes</a></li>
-      <li><a name="toc-Fonts-1" href="Fonts.html#Fonts">2.4.5 Fonts</a></li>
-      <li><a name="toc-Blending-and-Depth-Testing-1" href="Blending-and-Depth-Testing.html#Blending-and-Depth-Testing">2.4.6 Blending and Depth Testing</a></li>
-      <li><a name="toc-Vertex-Arrays-1" href="Vertex-Arrays.html#Vertex-Arrays">2.4.7 Vertex Arrays</a></li>
-      <li><a name="toc-Shaders-1" href="Shaders.html#Shaders">2.4.8 Shaders</a></li>
-      <li><a name="toc-Framebuffers-1" href="Framebuffers.html#Framebuffers">2.4.9 Framebuffers</a></li>
-      <li><a name="toc-Viewports-1" href="Viewports.html#Viewports">2.4.10 Viewports</a></li>
+      <li><a name="toc-Agendas-1" href="Agendas.html#Agendas">2.4.1 Agendas</a></li>
+      <li><a name="toc-Scripts-1" href="Scripts.html#Scripts">2.4.2 Scripts</a></li>
+      <li><a name="toc-Tweening-1" href="Tweening.html#Tweening">2.4.3 Tweening</a></li>
+      <li><a name="toc-Channels-1" href="Channels.html#Channels">2.4.4 Channels</a></li>
     </ul></li>
-    <li><a name="toc-Audio-1" href="Audio.html#Audio">2.5 Audio</a></li>
   </ul></li>
   <li><a name="toc-Copying-This-Manual-1" href="Copying-This-Manual.html#Copying-This-Manual">Appendix A Copying This Manual</a>
   <ul class="no-bullet">
author	David Thompson <dthompson2@worcester.edu>	2018-12-12 09:20:10 -0500
committer	David Thompson <dthompson2@worcester.edu>	2018-12-12 09:20:10 -0500
commit	f16fed3d50fd3d56deb46a3d4641a81460e389de (patch)
tree	71659ed643b65eadb17110b3f8f0c5d5cfdd3031
parent	c4b418c2dcfba3c741f67058a51a3e490aa4b297 (diff)