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 /manuals/chickadee/Quaternions.html
parent: c4b418c2dcfba3c741f67058a51a3e490aa4b297 (diff)
1 files changed, 146 insertions, 0 deletions
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+<!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;
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+A copy of the license is included in the section entitled "GNU
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+<!-- 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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+<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>
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 /manuals/chickadee/Quaternions.html
parent	c4b418c2dcfba3c741f67058a51a3e490aa4b297 (diff)