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diff --git a/manuals/chickadee/Bezier-Curves.html b/manuals/chickadee/Bezier-Curves.html deleted file mode 100644 index 8935b0f..0000000 --- a/manuals/chickadee/Bezier-Curves.html +++ /dev/null @@ -1,161 +0,0 @@ -<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> -<html> -<!-- Copyright (C) 2017-2023 David Thompson dthompson2@worcester.edu - -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. - - -* Chickadee: (chickadee). Game programming toolkit for Guile. - -The document was typeset with -http://www.texinfo.org/ (GNU Texinfo). - --> -<!-- Created by GNU Texinfo 6.7, 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" rel="start" title="Top" /> -<link href="Index.html" rel="index" title="Index" /> -<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents" /> -<link href="Math.html" rel="up" title="Math" /> -<link href="Graphics.html" rel="next" title="Graphics" /> -<link href="Easings.html" rel="prev" title="Easings" /> -<style type="text/css"> -<!-- -a.summary-letter {text-decoration: none} -blockquote.indentedblock {margin-right: 0em} -div.display {margin-left: 3.2em} -div.example {margin-left: 3.2em} -div.lisp {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} -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"> -<span id="Bezier-Curves"></span><div class="header"> -<p> -Previous: <a href="Easings.html" accesskey="p" rel="prev">Easings</a>, Up: <a href="Math.html" accesskey="u" rel="up">Math</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html" title="Index" rel="index">Index</a>]</p> -</div> -<hr /> -<span id="Bezier-Curves-1"></span><h4 class="subsection">5.2.7 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’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 “path”, where the end point of one curve -becomes the starting point of the next. -</p> -<dl> -<dt id="index-make_002dbezier_002dcurve">Procedure: <strong>make-bezier-curve</strong> <em>p0 p1 p2 p3</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 id="index-bezier_002dcurve_003f">Procedure: <strong>bezier-curve?</strong> <em>obj</em></dt> -<dd><p>Return <code>#t</code> if <var>obj</var> is a Bezier curve. -</p></dd></dl> - -<dl> -<dt id="index-bezier_002dcurve_002dp0">Procedure: <strong>bezier-curve-p0</strong> <em>bezier</em></dt> -<dd><p>Return the starting point of <var>bezier</var>. -</p></dd></dl> - -<dl> -<dt id="index-bezier_002dcurve_002dp1">Procedure: <strong>bezier-curve-p1</strong> <em>bezier</em></dt> -<dd><p>Return the first control point of <var>bezier</var>. -</p></dd></dl> - -<dl> -<dt id="index-bezier_002dcurve_002dp2">Procedure: <strong>bezier-curve-p2</strong> <em>bezier</em></dt> -<dd><p>Return the second control point of <var>bezier</var>. -</p></dd></dl> - -<dl> -<dt id="index-bezier_002dcurve_002dp3">Procedure: <strong>bezier-curve-p3</strong> <em>bezier</em></dt> -<dd><p>Return the end point of <var>bezier</var>. -</p></dd></dl> - -<dl> -<dt id="index-bezier_002dpath">Procedure: <strong>bezier-path</strong> <em>. control-points</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 id="index-bezier_002dcurve_002dpoint_002dat">Procedure: <strong>bezier-curve-point-at</strong> <em>bezier t</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 id="index-bezier_002dcurve_002dpoint_002dat_0021">Procedure: <strong>bezier-curve-point-at!</strong> <em>dest bezier t</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> -Previous: <a href="Easings.html" accesskey="p" rel="prev">Easings</a>, Up: <a href="Math.html" accesskey="u" rel="up">Math</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html" title="Index" rel="index">Index</a>]</p> -</div> - - - -</body> -</html> |