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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<tr><td colspan="5" class="shortcuts"><nobr><a href="#libg3d-matrix.synopsis" class="shortcut">Top</a>
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<a href="#libg3d-matrix.description" class="shortcut">Description</a></nobr></td></tr>
</table>
<div class="refentry" lang="en">
<a name="libg3d-matrix"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="libg3d-matrix.top_of_page"></a>matrix</span></h2>
<p>matrix — Matrix manipulation and calculation</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="libg3d-matrix.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <g3d/matrix.h>
typedef <a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a>;
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> <a class="link" href="libg3d-matrix.html#g3d-matrix-identity" title="g3d_matrix_identity ()">g3d_matrix_identity</a> (<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *matrix);
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> <a class="link" href="libg3d-matrix.html#g3d-matrix-multiply" title="g3d_matrix_multiply ()">g3d_matrix_multiply</a> (<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *m1,
<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *m2,
<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *rm);
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> <a class="link" href="libg3d-matrix.html#g3d-matrix-translate" title="g3d_matrix_translate ()">g3d_matrix_translate</a> (<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> x,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> y,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> z,
<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *rm);
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> <a class="link" href="libg3d-matrix.html#g3d-matrix-rotate" title="g3d_matrix_rotate ()">g3d_matrix_rotate</a> (<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> angle,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> ax,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> ay,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> az,
<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *rm);
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> <a class="link" href="libg3d-matrix.html#g3d-matrix-rotate-xyz" title="g3d_matrix_rotate_xyz ()">g3d_matrix_rotate_xyz</a> (<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> rx,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> ry,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> rz,
<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *rm);
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> <a class="link" href="libg3d-matrix.html#g3d-matrix-scale" title="g3d_matrix_scale ()">g3d_matrix_scale</a> (<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> x,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> y,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> z,
<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *rm);
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> <a class="link" href="libg3d-matrix.html#g3d-matrix-transpose" title="g3d_matrix_transpose ()">g3d_matrix_transpose</a> (<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *matrix);
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> <a class="link" href="libg3d-matrix.html#g3d-matrix-determinant" title="g3d_matrix_determinant ()">g3d_matrix_determinant</a> (<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *matrix);
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> <a class="link" href="libg3d-matrix.html#g3d-matrix-dump" title="g3d_matrix_dump ()">g3d_matrix_dump</a> (<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *matrix);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="libg3d-matrix.description"></a><h2>Description</h2>
<p>
Matrices in libg3d have the following layout:
</p>
<p>
G3DMatrix matrix[16]:
</p>
<p>
matrix[col * 4 + row] = f;</p>
<p>
</p>
</div>
<div class="refsect1" lang="en">
<a name="libg3d-matrix.details"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="G3DMatrix"></a><h3>G3DMatrix</h3>
<pre class="programlisting">typedef G3DFloat G3DMatrix;
</pre>
<p>
Matrix element type.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="g3d-matrix-identity"></a><h3>g3d_matrix_identity ()</h3>
<pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> g3d_matrix_identity (<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *matrix);</pre>
<p>
Sets the given matrix to the identity matrix.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>matrix</code></em> :</span></p></td>
<td> 4x4 matrix (float[16])
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE on success, FALSE else
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="g3d-matrix-multiply"></a><h3>g3d_matrix_multiply ()</h3>
<pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> g3d_matrix_multiply (<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *m1,
<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *m2,
<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *rm);</pre>
<p>
Multiplies the matrixes.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>m1</code></em> :</span></p></td>
<td> first matrix
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>m2</code></em> :</span></p></td>
<td> second matrix
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rm</code></em> :</span></p></td>
<td> resulting matrix
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE on success, FALSE else
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="g3d-matrix-translate"></a><h3>g3d_matrix_translate ()</h3>
<pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> g3d_matrix_translate (<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> x,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> y,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> z,
<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *rm);</pre>
<p>
Adds a translation to the the matrix.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> x translation
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> y translation
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z</code></em> :</span></p></td>
<td> z translation
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rm</code></em> :</span></p></td>
<td> resulting matrix
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE on success, FALSE else
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="g3d-matrix-rotate"></a><h3>g3d_matrix_rotate ()</h3>
<pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> g3d_matrix_rotate (<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> angle,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> ax,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> ay,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> az,
<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *rm);</pre>
<p>
Adds a rotation to the matrix.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>angle</code></em> :</span></p></td>
<td> rotation angle
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ax</code></em> :</span></p></td>
<td> x component of rotation axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ay</code></em> :</span></p></td>
<td> y component of rotation axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>az</code></em> :</span></p></td>
<td> z component of rotation axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rm</code></em> :</span></p></td>
<td> resulting matrix
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE on success, FALSE else
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="g3d-matrix-rotate-xyz"></a><h3>g3d_matrix_rotate_xyz ()</h3>
<pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> g3d_matrix_rotate_xyz (<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> rx,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> ry,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> rz,
<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *rm);</pre>
<p>
Adds a rotation around the 3 coordinate system axes to the matrix.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>rx</code></em> :</span></p></td>
<td> rotation around x axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ry</code></em> :</span></p></td>
<td> rotation around y axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rz</code></em> :</span></p></td>
<td> rotation around z axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rm</code></em> :</span></p></td>
<td> resulting matrix
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE on success, FALSE else
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="g3d-matrix-scale"></a><h3>g3d_matrix_scale ()</h3>
<pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> g3d_matrix_scale (<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> x,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> y,
<a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> z,
<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *rm);</pre>
<p>
Adds a scaling to the matrix.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> x factor
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> y factor
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z</code></em> :</span></p></td>
<td> z factor
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rm</code></em> :</span></p></td>
<td> resulting matrix
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE on success, FALSE else
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="g3d-matrix-transpose"></a><h3>g3d_matrix_transpose ()</h3>
<pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> g3d_matrix_transpose (<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *matrix);</pre>
<p>
Transposes the matrix.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>matrix</code></em> :</span></p></td>
<td> the matrix
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE on success, FALSE else
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="g3d-matrix-determinant"></a><h3>g3d_matrix_determinant ()</h3>
<pre class="programlisting"><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat">G3DFloat</a> g3d_matrix_determinant (<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *matrix);</pre>
<p>
Calculate the determinant of the matrix (FIXME: not verified).</p>
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<td><p><span class="term"><em class="parameter"><code>matrix</code></em> :</span></p></td>
<td> the matrix
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the determinant.
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<div class="refsect2" lang="en">
<a name="g3d-matrix-dump"></a><h3>g3d_matrix_dump ()</h3>
<pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> g3d_matrix_dump (<a class="link" href="libg3d-matrix.html#G3DMatrix" title="G3DMatrix">G3DMatrix</a> *matrix);</pre>
<p>
If debugging is enabled, this function dump the matrix to stderr.</p>
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</p>
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<td><p><span class="term"><em class="parameter"><code>matrix</code></em> :</span></p></td>
<td> the matrix
</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE if matrix is dumped, FALSE else
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