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authorDavid Thompson <dthompson2@worcester.edu>2023-12-28 11:23:49 -0500
committerDavid Thompson <dthompson2@worcester.edu>2023-12-28 11:23:49 -0500
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tree96377006bbfee75bcf0ce208c1ef89cbdfa5b803 /manuals/chickadee/Bezier-Curves.html
parent5b2e467a7e5e2ffbb0cbbf2557283be891d8206b (diff)
Delete manuals!
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-<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> &nbsp; [<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&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>
-<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> &nbsp; [<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>
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