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diff --git a/manuals/chickadee/Basics.html b/manuals/chickadee/Basics.html index 4c2d313..70d1a04 100644 --- a/manuals/chickadee/Basics.html +++ b/manuals/chickadee/Basics.html @@ -1,6 +1,6 @@ <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> -<!-- Copyright (C) 2017, 2018, 2019 David Thompson davet@gnu.org +<!-- Copyright (C) 2017-2020 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 @@ -18,7 +18,7 @@ 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/ --> +<!-- Created by GNU Texinfo 6.6, http://www.gnu.org/software/texinfo/ --> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Basics (The Chickadee Game Toolkit)</title> @@ -38,23 +38,14 @@ http://www.texinfo.org/ (GNU Texinfo). <!-- 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} @@ -89,17 +80,15 @@ ul.no-bullet {list-style: none} </head> <body lang="en"> -<a name="Basics"></a> -<div class="header"> +<span id="Basics"></span><div class="header"> <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> [<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="Basics-1"></a> -<h4 class="subsection">2.2.1 Basics</h4> +<span id="Basics-1"></span><h4 class="subsection">2.2.1 Basics</h4> <dl> -<dt><a name="index-pi"></a>Variable: <strong>pi</strong></dt> +<dt id="index-pi">Variable: <strong>pi</strong></dt> <dd><p>An essential constant for all trigonometry. Pi is the ratio of a circle’s circumferences to its diameter. Since pi is an irrational number, the <var>pi</var> in Chickadee is a mere floating point @@ -107,15 +96,43 @@ approximation that is “good enough.” </p></dd></dl> <dl> -<dt><a name="index-pi_002f2"></a>Variable: <strong>pi/2</strong></dt> +<dt id="index-pi_002f2">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>z</em></dt> +<dt id="index-2pi">Variable: <strong>2pi</strong></dt> +<dd><p>Twice <var>pi</var>. +</p></dd></dl> + +<dl> +<dt id="index-cotan">Procedure: <strong>cotan</strong> <em>z</em></dt> <dd><p>Return the cotangent of <var>z</var>. </p></dd></dl> +<dl> +<dt id="index-clamp">Procedure: <strong>clamp</strong> <em>min max x</em></dt> +<dd><p>Restrict <var>x</var> to the inclusive range defined by <var>min</var> and +<var>max</var>. This procedure assumes that <var>min</var> is actually less +than <var>max</var>. +</p></dd></dl> + +<dl> +<dt id="index-lerp">Procedure: <strong>lerp</strong> <em>start end alpha</em></dt> +<dd><p>Linearly interpolate the numbers <var>start</var> and <var>end</var> using the +factor <var>alpha</var>, a number in the range [0, 1]. +</p></dd></dl> + +<dl> +<dt id="index-degrees_002d_003eradians">Procedure: <strong>degrees->radians</strong> <em>degrees</em></dt> +<dd><p>Convert <var>degrees</var> to radians. +</p></dd></dl> + +<dl> +<dt id="index-degrees_002d_003eradians-1">Procedure: <strong>degrees->radians</strong> <em>radians</em></dt> +<dd><p>Convert <var>radians</var> to degrees. +</p></dd></dl> + |