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<a name="graphene-Frustum"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="graphene-Frustum.top_of_page"></a>Frustum</span></h2>
<p>Frustum — A 3D field of view</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="graphene-Frustum.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-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="returnvalue">graphene_frustum_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="graphene-Frustum.html#graphene-frustum-alloc" title="graphene_frustum_alloc ()">graphene_frustum_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-Frustum.html#graphene-frustum-free" title="graphene_frustum_free ()">graphene_frustum_free</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="returnvalue">graphene_frustum_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="graphene-Frustum.html#graphene-frustum-init" title="graphene_frustum_init ()">graphene_frustum_init</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="returnvalue">graphene_frustum_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="graphene-Frustum.html#graphene-frustum-init-from-frustum" title="graphene_frustum_init_from_frustum ()">graphene_frustum_init_from_frustum</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="returnvalue">graphene_frustum_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="graphene-Frustum.html#graphene-frustum-init-from-matrix" title="graphene_frustum_init_from_matrix ()">graphene_frustum_init_from_matrix</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-Frustum.html#graphene-frustum-get-planes" title="graphene_frustum_get_planes ()">graphene_frustum_get_planes</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-Frustum.html#graphene-frustum-contains-point" title="graphene_frustum_contains_point ()">graphene_frustum_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-Frustum.html#graphene-frustum-intersects-sphere" title="graphene_frustum_intersects_sphere ()">graphene_frustum_intersects_sphere</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-Frustum.html#graphene-frustum-intersects-box" title="graphene_frustum_intersects_box ()">graphene_frustum_intersects_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-Frustum.html#graphene-frustum-equal" title="graphene_frustum_equal ()">graphene_frustum_equal</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="graphene-Frustum.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-Frustum.html#graphene-frustum-t" title="graphene_frustum_t">graphene_frustum_t</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="graphene-Frustum.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <graphene.h>
</pre>
</div>
<div class="refsect1">
<a name="graphene-Frustum.description"></a><h2>Description</h2>
<p>A <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> represents a volume of space delimited by planes. It
is usually employed to represent the field of view of a camera, and can be
used to determine whether an object falls within that view, to efficiently
remove invisible objects from the render process.</p>
</div>
<div class="refsect1">
<a name="graphene-Frustum.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="graphene-frustum-alloc"></a><h3>graphene_frustum_alloc ()</h3>
<pre class="programlisting"><a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="returnvalue">graphene_frustum_t</span></a> *
graphene_frustum_alloc (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Allocates a new <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> structure.</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-frustum-alloc.returns"></a><h4>Returns</h4>
<p>the newly allocated <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a>
structure. Use <a class="link" href="graphene-Frustum.html#graphene-frustum-free" title="graphene_frustum_free ()"><code class="function">graphene_frustum_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-frustum-free"></a><h3>graphene_frustum_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
graphene_frustum_free (<em class="parameter"><code><a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> *f</code></em>);</pre>
<p>Frees the resources allocated by <a class="link" href="graphene-Frustum.html#graphene-frustum-alloc" title="graphene_frustum_alloc ()"><code class="function">graphene_frustum_alloc()</code></a>.</p>
<div class="refsect3">
<a name="graphene-frustum-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>f</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_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-frustum-init"></a><h3>graphene_frustum_init ()</h3>
<pre class="programlisting"><a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="returnvalue">graphene_frustum_t</span></a> *
graphene_frustum_init (<em class="parameter"><code><a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> *f</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Plane.html#graphene-plane-t" title="graphene_plane_t"><span class="type">graphene_plane_t</span></a> *p0</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Plane.html#graphene-plane-t" title="graphene_plane_t"><span class="type">graphene_plane_t</span></a> *p1</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Plane.html#graphene-plane-t" title="graphene_plane_t"><span class="type">graphene_plane_t</span></a> *p2</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Plane.html#graphene-plane-t" title="graphene_plane_t"><span class="type">graphene_plane_t</span></a> *p3</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Plane.html#graphene-plane-t" title="graphene_plane_t"><span class="type">graphene_plane_t</span></a> *p4</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Plane.html#graphene-plane-t" title="graphene_plane_t"><span class="type">graphene_plane_t</span></a> *p5</code></em>);</pre>
<p>Initializes the given <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> using the provided
clipping planes.</p>
<div class="refsect3">
<a name="graphene-frustum-init.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>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> to initialize</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>p0</p></td>
<td class="parameter_description"><p>a clipping plane</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>p1</p></td>
<td class="parameter_description"><p>a clipping plane</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>p2</p></td>
<td class="parameter_description"><p>a clipping plane</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>p3</p></td>
<td class="parameter_description"><p>a clipping plane</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>p4</p></td>
<td class="parameter_description"><p>a clipping plane</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>p5</p></td>
<td class="parameter_description"><p>a clipping plane</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-frustum-init.returns"></a><h4>Returns</h4>
<p>the initialized frustum. </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-frustum-init-from-frustum"></a><h3>graphene_frustum_init_from_frustum ()</h3>
<pre class="programlisting"><a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="returnvalue">graphene_frustum_t</span></a> *
graphene_frustum_init_from_frustum (<em class="parameter"><code><a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> *f</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> *src</code></em>);</pre>
<p>Initializes the given <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> using the clipping
planes of another <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a>.</p>
<div class="refsect3">
<a name="graphene-frustum-init-from-frustum.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>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> to initialize</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-frustum-init-from-frustum.returns"></a><h4>Returns</h4>
<p>the initialized frustum. </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-frustum-init-from-matrix"></a><h3>graphene_frustum_init_from_matrix ()</h3>
<pre class="programlisting"><a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="returnvalue">graphene_frustum_t</span></a> *
graphene_frustum_init_from_matrix (<em class="parameter"><code><a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> *f</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Matrix.html#graphene-matrix-t" title="graphene_matrix_t"><span class="type">graphene_matrix_t</span></a> *matrix</code></em>);</pre>
<p>Initializes a <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> using the given <em class="parameter"><code>matrix</code></em>
.</p>
<div class="refsect3">
<a name="graphene-frustum-init-from-matrix.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>f</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>matrix</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Matrix.html#graphene-matrix-t" title="graphene_matrix_t"><span class="type">graphene_matrix_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-frustum-init-from-matrix.returns"></a><h4>Returns</h4>
<p>the initialized frustum. </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-frustum-get-planes"></a><h3>graphene_frustum_get_planes ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
graphene_frustum_get_planes (<em class="parameter"><code>const <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> *f</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> planes[]</code></em>);</pre>
<p>Retrieves the planes that define the given <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a>.</p>
<div class="refsect3">
<a name="graphene-frustum-get-planes.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>f</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>planes</p></td>
<td class="parameter_description"><p>return location for an array
of 6 <a class="link" href="graphene-Plane.html#graphene-plane-t" title="graphene_plane_t"><span class="type">graphene_plane_t</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> fixed-size=6]</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-frustum-contains-point"></a><h3>graphene_frustum_contains_point ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
graphene_frustum_contains_point (<em class="parameter"><code>const <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> *f</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> *point</code></em>);</pre>
<p>Checks whether a point is inside the volume defined by the given
<a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a>.</p>
<div class="refsect3">
<a name="graphene-frustum-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>f</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>point</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-frustum-contains-point.returns"></a><h4>Returns</h4>
<p> <code class="literal">true</code> if the point is inside the frustum</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-frustum-intersects-sphere"></a><h3>graphene_frustum_intersects_sphere ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
graphene_frustum_intersects_sphere (<em class="parameter"><code>const <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> *f</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Sphere.html#graphene-sphere-t" title="graphene_sphere_t"><span class="type">graphene_sphere_t</span></a> *sphere</code></em>);</pre>
<p>Checks whether the given <em class="parameter"><code>sphere</code></em>
intersects a plane of
a <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a>.</p>
<div class="refsect3">
<a name="graphene-frustum-intersects-sphere.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>f</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>sphere</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Sphere.html#graphene-sphere-t" title="graphene_sphere_t"><span class="type">graphene_sphere_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-frustum-intersects-sphere.returns"></a><h4>Returns</h4>
<p> <code class="literal">true</code> if the sphere intersects the frustum</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-frustum-intersects-box"></a><h3>graphene_frustum_intersects_box ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
graphene_frustum_intersects_box (<em class="parameter"><code>const <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> *f</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Box.html#graphene-box-t" title="graphene_box_t"><span class="type">graphene_box_t</span></a> *box</code></em>);</pre>
<p>Checks whether the given <em class="parameter"><code>box</code></em>
intersects a plane of
a <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a>.</p>
<div class="refsect3">
<a name="graphene-frustum-intersects-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>f</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="graphene-Box.html#graphene-box-t" title="graphene_box_t"><span class="type">graphene_box_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-frustum-intersects-box.returns"></a><h4>Returns</h4>
<p> <code class="literal">true</code> if the box intersects the frustum</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-frustum-equal"></a><h3>graphene_frustum_equal ()</h3>
<pre class="programlisting"><span class="returnvalue">bool</span>
graphene_frustum_equal (<em class="parameter"><code>const <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> *a</code></em>,
<em class="parameter"><code>const <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> *b</code></em>);</pre>
<p>Checks whether the two given <a class="link" href="graphene-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a> are equal.</p>
<div class="refsect3">
<a name="graphene-frustum-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-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_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-Frustum.html#graphene-frustum-t" title="graphene_frustum_t"><span class="type">graphene_frustum_t</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="graphene-frustum-equal.returns"></a><h4>Returns</h4>
<p> <code class="literal">true</code> if the given frustums are equal</p>
</div>
<p class="since">Since: <a class="link" href="ix06.html#api-index-1.6">1.6</a></p>
</div>
</div>
<div class="refsect1">
<a name="graphene-Frustum.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="graphene-frustum-t"></a><h3>graphene_frustum_t</h3>
<pre class="programlisting">typedef struct {
} graphene_frustum_t;
</pre>
<p>A 3D volume delimited by 2D clip planes.</p>
<p>The contents of the <code class="literal">graphene_frustum_t</code> are private, and should not be
modified directly.</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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