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53 lines
1.4 KiB
HTML
53 lines
1.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
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"http://www.w3.org/TR/REC-html40/loose.dtd">
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<!-- $Id: vec2.html 153 2000-09-05 16:11:26Z garland $ -->
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<html>
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<head>
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<title>libgfx: Vector Math</title>
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<link rel=stylesheet href="cdoc.css" type="text/css">
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<meta name="Author" content="Michael Garland">
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</head>
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<body>
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<h2>Vector Math</h2>
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<h3>class Vec2</h3>
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<p> This class implements a 2-dimensional real-valued vector.
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Individual elements are represent with <code>double</code> precision
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floating point numbers. To use the <tt>Vec2</tt> class you must
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include the header
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<pre>
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#include <gfx/vec2.h>
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</pre>
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<h4>Constructor Methods</h4>
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<p>The <tt>Vec2</tt> class defines the following set of constructors:
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<pre>
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Vec2(); <i>// Initializes vector to (0 0).</i>
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Vec2(double x, double y); <i>// Initializes vector to (x y).</i>
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Vec2(double s); <i>// Initializes vector to (s s)</i>
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Vec2(const Vec2& v); <i>// </i>
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Vec2(const float v[2]); <i>// These copy values from v</i>
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Vec2(const double v[2]); <i>// </i>
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</pre>
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<h4>Specialized Functions</h4>
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<p>Beyond the standard functions supported by all vector classes, the
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<tt>Vec2</tt> class provides the following additional function:
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<pre>
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Vec2 perp(const Vec2 &v);
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</pre>
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that returns a new vector which is perpendicular to the given vector.
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</body>
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</html>
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