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<a href="#graphene-Triangle.description" class="shortcut">Description</a></span>
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<div class="refentry">
<a name="graphene-Triangle"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="graphene-Triangle.top_of_page"></a>Triangle</span></h2>
<p>Triangle — A triangle described by 3D points</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="graphene-Triangle.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_proto_type">
<col class="functions_proto_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="returnvalue">graphene_triangle_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-alloc" title="graphene_triangle_alloc ()">graphene_triangle_alloc</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-free" title="graphene_triangle_free ()">graphene_triangle_free</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="returnvalue">graphene_triangle_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-init-from-point3d" title="graphene_triangle_init_from_point3d ()">graphene_triangle_init_from_point3d</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="returnvalue">graphene_triangle_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-init-from-vec3" title="graphene_triangle_init_from_vec3 ()">graphene_triangle_init_from_vec3</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="returnvalue">graphene_triangle_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-init-from-float" title="graphene_triangle_init_from_float ()">graphene_triangle_init_from_float</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-get-points" title="graphene_triangle_get_points ()">graphene_triangle_get_points</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-get-vertices" title="graphene_triangle_get_vertices ()">graphene_triangle_get_vertices</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">float</span>
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-get-area" title="graphene_triangle_get_area ()">graphene_triangle_get_area</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-get-midpoint" title="graphene_triangle_get_midpoint ()">graphene_triangle_get_midpoint</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-get-normal" title="graphene_triangle_get_normal ()">graphene_triangle_get_normal</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-get-plane" title="graphene_triangle_get_plane ()">graphene_triangle_get_plane</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-get-bounding-box" title="graphene_triangle_get_bounding_box ()">graphene_triangle_get_bounding_box</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">bool</span>
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-get-barycoords" title="graphene_triangle_get_barycoords ()">graphene_triangle_get_barycoords</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">bool</span>
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-get-uv" title="graphene_triangle_get_uv ()">graphene_triangle_get_uv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">bool</span>
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-contains-point" title="graphene_triangle_contains_point ()">graphene_triangle_contains_point</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">bool</span>
</td>
<td class="function_name">
<a class="link" href="graphene-Triangle.html#graphene-triangle-equal" title="graphene_triangle_equal ()">graphene_triangle_equal</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="graphene-Triangle.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="other_proto_type">
<col class="other_proto_name">
</colgroup>
<tbody><tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t">graphene_triangle_t</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="graphene-Triangle.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <graphene.h>
</pre>
</div>
<div class="refsect1">
<a name="graphene-Triangle.description"></a><h2>Description</h2>
<p><a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> represents a triangle in 3D space.</p>
</div>
<div class="refsect1">
<a name="graphene-Triangle.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="graphene-triangle-alloc"></a><h3>graphene_triangle_alloc ()</h3>
<pre class="programlisting"><a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="returnvalue">graphene_triangle_t</span></a> *
graphene_triangle_alloc (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Allocates a new <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a>.</p>
<p>The contents of the returned structure are undefined.</p>
<p><span class="annotation">[<acronym title="This symbol is a constructor, not a static method."><span class="acronym">constructor</span></acronym>]</span></p>
<div class="refsect3">
<a name="graphene-triangle-alloc.returns"></a><h4>Returns</h4>
<p>the newly allocated <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a>
structure. Use <a class="link" href="graphene-Triangle.html#graphene-triangle-free" title="graphene_triangle_free ()"><code class="function">graphene_triangle_free()</code></a> to free the resources
allocated by this function. </p>
<p><span class="annotation">[<acronym title="The caller owns the data, and is responsible for free it."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-free"></a><h3>graphene_triangle_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
graphene_triangle_free (<em class="parameter"><code><a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>);</pre>
<p>Frees the resources allocated by <a class="link" href="graphene-Triangle.html#graphene-triangle-alloc" title="graphene_triangle_alloc ()"><code class="function">graphene_triangle_alloc()</code></a>.</p>
<div class="refsect3">
<a name="graphene-triangle-free.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-init-from-point3d"></a><h3>graphene_triangle_init_from_point3d ()</h3>
<pre class="programlisting"><a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="returnvalue">graphene_triangle_t</span></a> *
graphene_triangle_init_from_point3d (<em class="parameter"><code><a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a> *a</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a> *b</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a> *c</code></em>);</pre>
<p>Initializes a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> using the three given 3D points.</p>
<div class="refsect3">
<a name="graphene-triangle-init-from-point3d.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>the <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> to initialize</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>a</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>b</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>c</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-triangle-init-from-point3d.returns"></a><h4>Returns</h4>
<p>the initialized <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a>. </p>
<p><span class="annotation">[<acronym title="The data is owned by the callee, which is responsible of freeing it."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-init-from-vec3"></a><h3>graphene_triangle_init_from_vec3 ()</h3>
<pre class="programlisting"><a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="returnvalue">graphene_triangle_t</span></a> *
graphene_triangle_init_from_vec3 (<em class="parameter"><code><a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Vectors.html#graphene-vec3-t" title="graphene_vec3_t"><span class="type">graphene_vec3_t</span></a> *a</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Vectors.html#graphene-vec3-t" title="graphene_vec3_t"><span class="type">graphene_vec3_t</span></a> *b</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Vectors.html#graphene-vec3-t" title="graphene_vec3_t"><span class="type">graphene_vec3_t</span></a> *c</code></em>);</pre>
<p>Initializes a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> using the three given vectors.</p>
<div class="refsect3">
<a name="graphene-triangle-init-from-vec3.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>the <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> to initialize</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>a</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Vectors.html#graphene-vec3-t" title="graphene_vec3_t"><span class="type">graphene_vec3_t</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>b</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Vectors.html#graphene-vec3-t" title="graphene_vec3_t"><span class="type">graphene_vec3_t</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>c</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Vectors.html#graphene-vec3-t" title="graphene_vec3_t"><span class="type">graphene_vec3_t</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-triangle-init-from-vec3.returns"></a><h4>Returns</h4>
<p>the initialized <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a>. </p>
<p><span class="annotation">[<acronym title="The data is owned by the callee, which is responsible of freeing it."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-init-from-float"></a><h3>graphene_triangle_init_from_float ()</h3>
<pre class="programlisting"><a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="returnvalue">graphene_triangle_t</span></a> *
graphene_triangle_init_from_float (<em class="parameter"><code><a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>,
<em class="parameter"><code>const <span class="type">float</span> *a</code></em>,
<em class="parameter"><code>const <span class="type">float</span> *b</code></em>,
<em class="parameter"><code>const <span class="type">float</span> *c</code></em>);</pre>
<p>Initializes a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> using the three given arrays
of floating point values, each representing the coordinates of
a point in 3D space.</p>
<div class="refsect3">
<a name="graphene-triangle-init-from-float.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>the <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> to initialize</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>a</p></td>
<td class="parameter_description"><p>an array of 3 floating point values. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL must not be passed as the value in, out, in-out; or as a return value."><span class="acronym">not nullable</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> fixed-size=3]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>b</p></td>
<td class="parameter_description"><p>an array of 3 floating point values. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL must not be passed as the value in, out, in-out; or as a return value."><span class="acronym">not nullable</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> fixed-size=3]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>c</p></td>
<td class="parameter_description"><p>an array of 3 floating point values. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL must not be passed as the value in, out, in-out; or as a return value."><span class="acronym">not nullable</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> fixed-size=3]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-triangle-init-from-float.returns"></a><h4>Returns</h4>
<p>the initialized <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a>. </p>
<p><span class="annotation">[<acronym title="The data is owned by the callee, which is responsible of freeing it."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix07.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-get-points"></a><h3>graphene_triangle_get_points ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
graphene_triangle_get_points (<em class="parameter"><code>const <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>,
<em class="parameter"><code><a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a> *a</code></em>,
<em class="parameter"><code><a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a> *b</code></em>,
<em class="parameter"><code><a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a> *c</code></em>);</pre>
<p>Retrieves the three vertices of the given <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> and returns
their coordinates as <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a>.</p>
<div class="refsect3">
<a name="graphene-triangle-get-points.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>a</p></td>
<td class="parameter_description"><p>return location for the coordinates
of the first vertex. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>][<acronym title="NULL may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>b</p></td>
<td class="parameter_description"><p>return location for the coordinates
of the second vertex. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>][<acronym title="NULL may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>c</p></td>
<td class="parameter_description"><p>return location for the coordinates
of the third vertex. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>][<acronym title="NULL may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-get-vertices"></a><h3>graphene_triangle_get_vertices ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
graphene_triangle_get_vertices (<em class="parameter"><code>const <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>,
<em class="parameter"><code><a class="link" href="graphene-Vectors.html#graphene-vec3-t" title="graphene_vec3_t"><span class="type">graphene_vec3_t</span></a> *a</code></em>,
<em class="parameter"><code><a class="link" href="graphene-Vectors.html#graphene-vec3-t" title="graphene_vec3_t"><span class="type">graphene_vec3_t</span></a> *b</code></em>,
<em class="parameter"><code><a class="link" href="graphene-Vectors.html#graphene-vec3-t" title="graphene_vec3_t"><span class="type">graphene_vec3_t</span></a> *c</code></em>);</pre>
<p>Retrieves the three vertices of the given <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a>.</p>
<div class="refsect3">
<a name="graphene-triangle-get-vertices.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>a</p></td>
<td class="parameter_description"><p>return location for the first vertex. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>][<acronym title="NULL may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>b</p></td>
<td class="parameter_description"><p>return location for the second vertex. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>][<acronym title="NULL may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>c</p></td>
<td class="parameter_description"><p>return location for the third vertex. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>][<acronym title="NULL may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-get-area"></a><h3>graphene_triangle_get_area ()</h3>
<pre class="programlisting"><span class="returnvalue">float</span>
graphene_triangle_get_area (<em class="parameter"><code>const <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>);</pre>
<p>Computes the area of the given <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a>.</p>
<div class="refsect3">
<a name="graphene-triangle-get-area.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-triangle-get-area.returns"></a><h4>Returns</h4>
<p> the area of the triangle</p>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-get-midpoint"></a><h3>graphene_triangle_get_midpoint ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
graphene_triangle_get_midpoint (<em class="parameter"><code>const <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>,
<em class="parameter"><code><a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a> *res</code></em>);</pre>
<p>Computes the coordinates of the midpoint of the given <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a>.</p>
<p>The midpoint G is the <a class="ulink" href="https://en.wikipedia.org/wiki/Centroid#Triangle_centroid" target="_top">centroid</a>
of the triangle, i.e. the intersection of its medians.</p>
<div class="refsect3">
<a name="graphene-triangle-get-midpoint.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>res</p></td>
<td class="parameter_description"><p>return location for the coordinates of
the midpoint. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-get-normal"></a><h3>graphene_triangle_get_normal ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
graphene_triangle_get_normal (<em class="parameter"><code>const <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>,
<em class="parameter"><code><a class="link" href="graphene-Vectors.html#graphene-vec3-t" title="graphene_vec3_t"><span class="type">graphene_vec3_t</span></a> *res</code></em>);</pre>
<p>Computes the normal vector of the given <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a>.</p>
<div class="refsect3">
<a name="graphene-triangle-get-normal.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>res</p></td>
<td class="parameter_description"><p>return location for the normal vector. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-get-plane"></a><h3>graphene_triangle_get_plane ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
graphene_triangle_get_plane (<em class="parameter"><code>const <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>,
<em class="parameter"><code><a class="link" href="graphene-Plane.html#graphene-plane-t" title="graphene_plane_t"><span class="type">graphene_plane_t</span></a> *res</code></em>);</pre>
<p>Computes the plane based on the vertices of the given <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a>.</p>
<div class="refsect3">
<a name="graphene-triangle-get-plane.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>res</p></td>
<td class="parameter_description"><p>return location for the plane. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-get-bounding-box"></a><h3>graphene_triangle_get_bounding_box ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
graphene_triangle_get_bounding_box (<em class="parameter"><code>const <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>,
<em class="parameter"><code><a class="link" href="graphene-Box.html#graphene-box-t" title="graphene_box_t"><span class="type">graphene_box_t</span></a> *res</code></em>);</pre>
<p>Computes the bounding box of the given <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a>.</p>
<div class="refsect3">
<a name="graphene-triangle-get-bounding-box.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>res</p></td>
<td class="parameter_description"><p>return location for the box. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-get-barycoords"></a><h3>graphene_triangle_get_barycoords ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
graphene_triangle_get_barycoords (<em class="parameter"><code>const <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a> *p</code></em>,
<em class="parameter"><code><a class="link" href="graphene-Vectors.html#graphene-vec2-t" title="graphene_vec2_t"><span class="type">graphene_vec2_t</span></a> *res</code></em>);</pre>
<p>Computes the <a class="ulink" href="http://en.wikipedia.org/wiki/Barycentric_coordinate_system" target="_top">barycentric coordinates</a>
of the given point <em class="parameter"><code>p</code></em>
.</p>
<p>The point <em class="parameter"><code>p</code></em>
must lie on the same plane as the triangle <em class="parameter"><code>t</code></em>
; if the
point is not coplanar, the result of this function is undefined.</p>
<p>If we place the origin in the coordinates of the triangle's A point,
the barycentric coordinates are <code class="literal">u</code>, which is on the AC vector; and <code class="literal">v</code>
which is on the AB vector:</p>
<p><span class="inlinemediaobject"><img src="triangle-barycentric.png"></span></p>
<p>The returned <a class="link" href="graphene-Vectors.html#graphene-vec2-t" title="graphene_vec2_t"><span class="type">graphene_vec2_t</span></a> contains the following values, in order:</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><p><code class="literal">res.x = u</code></p></li>
<li class="listitem"><p><code class="literal">res.y = v</code></p></li>
</ul></div>
<div class="refsect3">
<a name="graphene-triangle-get-barycoords.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>res</p></td>
<td class="parameter_description"><p>return location for the vector
with the barycentric coordinates. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-triangle-get-barycoords.returns"></a><h4>Returns</h4>
<p> <code class="literal">true</code> if the barycentric coordinates are valid</p>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-get-uv"></a><h3>graphene_triangle_get_uv ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
graphene_triangle_get_uv (<em class="parameter"><code>const <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a> *p</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Vectors.html#graphene-vec2-t" title="graphene_vec2_t"><span class="type">graphene_vec2_t</span></a> *uv_a</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Vectors.html#graphene-vec2-t" title="graphene_vec2_t"><span class="type">graphene_vec2_t</span></a> *uv_b</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Vectors.html#graphene-vec2-t" title="graphene_vec2_t"><span class="type">graphene_vec2_t</span></a> *uv_c</code></em>,
<em class="parameter"><code><a class="link" href="graphene-Vectors.html#graphene-vec2-t" title="graphene_vec2_t"><span class="type">graphene_vec2_t</span></a> *res</code></em>);</pre>
<p>Computes the UV coordinates of the given point <em class="parameter"><code>p</code></em>
.</p>
<p>The point <em class="parameter"><code>p</code></em>
must lie on the same plane as the triangle <em class="parameter"><code>t</code></em>
; if the point
is not coplanar, the result of this function is undefined. If <em class="parameter"><code>p</code></em>
is <code class="literal">NULL</code>,
the point will be set in (0, 0, 0).</p>
<p>The UV coordinates will be placed in the <em class="parameter"><code>res</code></em>
vector:</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><p><code class="literal">res.x = u</code></p></li>
<li class="listitem"><p><code class="literal">res.y = v</code></p></li>
</ul></div>
<p>See also: <a class="link" href="graphene-Triangle.html#graphene-triangle-get-barycoords" title="graphene_triangle_get_barycoords ()"><code class="function">graphene_triangle_get_barycoords()</code></a></p>
<div class="refsect3">
<a name="graphene-triangle-get-uv.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>uv_a</p></td>
<td class="parameter_description"><p>the UV coordinates of the first point</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>uv_b</p></td>
<td class="parameter_description"><p>the UV coordinates of the second point</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>uv_c</p></td>
<td class="parameter_description"><p>the UV coordinates of the third point</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>res</p></td>
<td class="parameter_description"><p>a vector containing the UV coordinates
of the given point <em class="parameter"><code>p</code></em>
. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-triangle-get-uv.returns"></a><h4>Returns</h4>
<p> <code class="literal">true</code> if the coordinates are valid</p>
</div>
<p class="since">Since: <a class="link" href="ix07.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-contains-point"></a><h3>graphene_triangle_contains_point ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
graphene_triangle_contains_point (<em class="parameter"><code>const <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *t</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a> *p</code></em>);</pre>
<p>Checks whether the given triangle <em class="parameter"><code>t</code></em>
contains the point <em class="parameter"><code>p</code></em>
.</p>
<div class="refsect3">
<a name="graphene-triangle-contains-point.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>t</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Point3D.html#graphene-point3d-t" title="graphene_point3d_t"><span class="type">graphene_point3d_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-triangle-contains-point.returns"></a><h4>Returns</h4>
<p> <code class="literal">true</code> if the point is inside the triangle</p>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="graphene-triangle-equal"></a><h3>graphene_triangle_equal ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
graphene_triangle_equal (<em class="parameter"><code>const <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *a</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> *b</code></em>);</pre>
<p>Checks whether the two given <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a> are equal.</p>
<div class="refsect3">
<a name="graphene-triangle-equal.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>a</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>b</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Triangle.html#graphene-triangle-t" title="graphene_triangle_t"><span class="type">graphene_triangle_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-triangle-equal.returns"></a><h4>Returns</h4>
<p> <code class="literal">true</code> if the triangles are equal</p>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
</div>
<div class="refsect1">
<a name="graphene-Triangle.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="graphene-triangle-t"></a><h3>graphene_triangle_t</h3>
<pre class="programlisting">typedef struct {
} graphene_triangle_t;
</pre>
<p>A triangle.</p>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.2">1.2</a></p>
</div>
</div>
</div>
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