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<h1>Math conversion routines</h1>Routines to convert between OpenGL and Allegro math types.
<a href="#_details">More...</a><h2>Matrix conversion routines</h2>
<ul>
<li>void <a class="el" href="group__math.html#g4cf4f453cb3f95a1e7e861a7401b4a8d">allegro_gl_MATRIX_to_GLfloat</a> (MATRIX *m, GLfloat gl[16])
<dl class="el"><dd class="mdescRight">Converts an Allegro fixed-point matrix to an array of floats suitable for OpenGL's matrix operations. <a href="#g4cf4f453cb3f95a1e7e861a7401b4a8d"></a><br></dl><li>void <a class="el" href="group__math.html#gee6cb48f8e3e70abecc6c282a8ea1edc">allegro_gl_MATRIX_to_GLdouble</a> (MATRIX *m, GLdouble gl[16])
<dl class="el"><dd class="mdescRight">Converts an Allegro fixed-point matrix to an array of doubles suitable for OpenGL's matrix operations. <a href="#gee6cb48f8e3e70abecc6c282a8ea1edc"></a><br></dl><li>void <a class="el" href="group__math.html#ge8e0ee18b9aeca955402be16de6ca79d">allegro_gl_MATRIX_f_to_GLfloat</a> (MATRIX_f *m, GLfloat gl[16])
<dl class="el"><dd class="mdescRight">Converts an Allegro floating-point matrix to an array of floats suitable for OpenGL's matrix operations. <a href="#ge8e0ee18b9aeca955402be16de6ca79d"></a><br></dl><li>void <a class="el" href="group__math.html#gb93f3588ea08b048f418023aa76cb3fc">allegro_gl_MATRIX_f_to_GLdouble</a> (MATRIX_f *m, GLdouble gl[16])
<dl class="el"><dd class="mdescRight">Converts an Allegro floating-point matrix to an array of doubles suitable for OpenGL's matrix operations. <a href="#gb93f3588ea08b048f418023aa76cb3fc"></a><br></dl><li>void <a class="el" href="group__math.html#g468e83ca4de52ed839978d48f5dbe111">allegro_gl_GLfloat_to_MATRIX</a> (GLfloat gl[16], MATRIX *m)
<dl class="el"><dd class="mdescRight">Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro fixed-point matrix. <a href="#g468e83ca4de52ed839978d48f5dbe111"></a><br></dl><li>void <a class="el" href="group__math.html#g68e2e0e9dcdba42004070a5f8f547994">allegro_gl_GLdouble_to_MATRIX</a> (GLdouble gl[16], MATRIX *m)
<dl class="el"><dd class="mdescRight">Converts an OpenGL double precision floating-point matrix issued from the matrix stack to an Allegro fixed-point matrix. <a href="#g68e2e0e9dcdba42004070a5f8f547994"></a><br></dl><li>void <a class="el" href="group__math.html#g08692466ae37d7888bbd5f5ee5aa9268">allegro_gl_GLfloat_to_MATRIX_f</a> (GLfloat gl[16], MATRIX_f *m)
<dl class="el"><dd class="mdescRight">Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro floating-point matrix. <a href="#g08692466ae37d7888bbd5f5ee5aa9268"></a><br></dl><li>void <a class="el" href="group__math.html#ga6b729a9e93e249a8a76e078e94a2b44">allegro_gl_GLdouble_to_MATRIX_f</a> (GLdouble gl[16], MATRIX_f *m)
<dl class="el"><dd class="mdescRight">Converts an OpenGL double precision floating-point matrix issued from the matrix stack to an Allegro single-precision floating-point matrix. <a href="#ga6b729a9e93e249a8a76e078e94a2b44"></a><br></dl></ul>
<h2>Quaternion conversion routines</h2>
<ul>
<li>void <a class="el" href="group__math.html#ga83a678516d8a7a5503a2b0c9014cb64">allegro_gl_apply_quat</a> (QUAT *q)
<dl class="el"><dd class="mdescRight">Multiplies the Quaternion to the current transformation matrix, by converting it to a call to glRotatef(). <a href="#ga83a678516d8a7a5503a2b0c9014cb64"></a><br></dl><li>void <a class="el" href="group__math.html#gb00b667363181a8f0853121170bebaca">allegro_gl_quat_to_glrotatef</a> (QUAT *q, float *angle, float *x, float *y, float *z)
<dl class="el"><dd class="mdescRight">Converts a quaternion to a vector/angle, which can be used with glRotate*(). <a href="#gb00b667363181a8f0853121170bebaca"></a><br></dl><li>void <a class="el" href="group__math.html#g956160418e1c0c37143dd3cee54477ce">allegro_gl_quat_to_glrotated</a> (QUAT *q, double *angle, double *x, double *y, double *z)
<dl class="el"><dd class="mdescRight">Converts a quaternion to a vector/angle, which can be used with glRotate*(). <a href="#g956160418e1c0c37143dd3cee54477ce"></a><br></dl></ul>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Routines to convert between OpenGL and Allegro math types.
<p>
<hr><h2>Function Documentation</h2>
<a class="anchor" name="g4cf4f453cb3f95a1e7e861a7401b4a8d"></a><!-- doxytag: member="alleggl.h::allegro_gl_MATRIX_to_GLfloat" ref="g4cf4f453cb3f95a1e7e861a7401b4a8d" args="(MATRIX *m, GLfloat gl[16])" -->
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<td class="memname">void allegro_gl_MATRIX_to_GLfloat </td>
<td>(</td>
<td class="paramtype">MATRIX * </td>
<td class="paramname"> <em>m</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">GLfloat </td>
<td class="paramname"> <em>gl</em>[16]</td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td width="100%"></td>
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<p>
Converts an Allegro fixed-point matrix to an array of floats suitable for OpenGL's matrix operations.
<p>
<b>Example:</b> <pre>
MATRIX m = identity_matrix;
GLfloat gl_m[16];
get_vector_rotation_matrix(&m, itofix(1), 0, itofix(1), ftofix(43.83));
allegro_gl_MATRIX_to_GLfloat(&m, &gl_m);
glLoadMatrixf(&gl_m);
</pre><p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__math.html#gee6cb48f8e3e70abecc6c282a8ea1edc" title="Converts an Allegro fixed-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#ge8e0ee18b9aeca955402be16de6ca79d" title="Converts an Allegro floating-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#gb93f3588ea08b048f418023aa76cb3fc" title="Converts an Allegro floating-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#g68e2e0e9dcdba42004070a5f8f547994" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX()</a> <p>
<a class="el" href="group__math.html#g08692466ae37d7888bbd5f5ee5aa9268" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#ga6b729a9e93e249a8a76e078e94a2b44" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#g468e83ca4de52ed839978d48f5dbe111" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX()</a> </dd></dl>
<p>
Definition at line <a class="el" href="math_8c-source.html#l00066">66</a> of file <a class="el" href="math_8c-source.html">math.c</a>.
</div>
</div><p>
<a class="anchor" name="gee6cb48f8e3e70abecc6c282a8ea1edc"></a><!-- doxytag: member="alleggl.h::allegro_gl_MATRIX_to_GLdouble" ref="gee6cb48f8e3e70abecc6c282a8ea1edc" args="(MATRIX *m, GLdouble gl[16])" -->
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<td class="memname">void allegro_gl_MATRIX_to_GLdouble </td>
<td>(</td>
<td class="paramtype">MATRIX * </td>
<td class="paramname"> <em>m</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">GLdouble </td>
<td class="paramname"> <em>gl</em>[16]</td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td width="100%"></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Converts an Allegro fixed-point matrix to an array of doubles suitable for OpenGL's matrix operations.
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__math.html#g4cf4f453cb3f95a1e7e861a7401b4a8d" title="Converts an Allegro fixed-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#ge8e0ee18b9aeca955402be16de6ca79d" title="Converts an Allegro floating-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#gb93f3588ea08b048f418023aa76cb3fc" title="Converts an Allegro floating-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#g68e2e0e9dcdba42004070a5f8f547994" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX()</a> <p>
<a class="el" href="group__math.html#g08692466ae37d7888bbd5f5ee5aa9268" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#ga6b729a9e93e249a8a76e078e94a2b44" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#g468e83ca4de52ed839978d48f5dbe111" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX()</a> </dd></dl>
<p>
Definition at line <a class="el" href="math_8c-source.html#l00082">82</a> of file <a class="el" href="math_8c-source.html">math.c</a>.
</div>
</div><p>
<a class="anchor" name="ge8e0ee18b9aeca955402be16de6ca79d"></a><!-- doxytag: member="alleggl.h::allegro_gl_MATRIX_f_to_GLfloat" ref="ge8e0ee18b9aeca955402be16de6ca79d" args="(MATRIX_f *m, GLfloat gl[16])" -->
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<td class="memname">void allegro_gl_MATRIX_f_to_GLfloat </td>
<td>(</td>
<td class="paramtype">MATRIX_f * </td>
<td class="paramname"> <em>m</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">GLfloat </td>
<td class="paramname"> <em>gl</em>[16]</td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td width="100%"></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Converts an Allegro floating-point matrix to an array of floats suitable for OpenGL's matrix operations.
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__math.html#g4cf4f453cb3f95a1e7e861a7401b4a8d" title="Converts an Allegro fixed-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#gee6cb48f8e3e70abecc6c282a8ea1edc" title="Converts an Allegro fixed-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#gb93f3588ea08b048f418023aa76cb3fc" title="Converts an Allegro floating-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#g68e2e0e9dcdba42004070a5f8f547994" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX()</a> <p>
<a class="el" href="group__math.html#g08692466ae37d7888bbd5f5ee5aa9268" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#ga6b729a9e93e249a8a76e078e94a2b44" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#g468e83ca4de52ed839978d48f5dbe111" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX()</a> </dd></dl>
<p>
Definition at line <a class="el" href="math_8c-source.html#l00098">98</a> of file <a class="el" href="math_8c-source.html">math.c</a>.
</div>
</div><p>
<a class="anchor" name="gb93f3588ea08b048f418023aa76cb3fc"></a><!-- doxytag: member="alleggl.h::allegro_gl_MATRIX_f_to_GLdouble" ref="gb93f3588ea08b048f418023aa76cb3fc" args="(MATRIX_f *m, GLdouble gl[16])" -->
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<td class="memname">void allegro_gl_MATRIX_f_to_GLdouble </td>
<td>(</td>
<td class="paramtype">MATRIX_f * </td>
<td class="paramname"> <em>m</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">GLdouble </td>
<td class="paramname"> <em>gl</em>[16]</td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td width="100%"></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Converts an Allegro floating-point matrix to an array of doubles suitable for OpenGL's matrix operations.
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__math.html#g4cf4f453cb3f95a1e7e861a7401b4a8d" title="Converts an Allegro fixed-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#gee6cb48f8e3e70abecc6c282a8ea1edc" title="Converts an Allegro fixed-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#ge8e0ee18b9aeca955402be16de6ca79d" title="Converts an Allegro floating-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#g68e2e0e9dcdba42004070a5f8f547994" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX()</a> <p>
<a class="el" href="group__math.html#g08692466ae37d7888bbd5f5ee5aa9268" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#ga6b729a9e93e249a8a76e078e94a2b44" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#g468e83ca4de52ed839978d48f5dbe111" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX()</a> </dd></dl>
<p>
Definition at line <a class="el" href="math_8c-source.html#l00114">114</a> of file <a class="el" href="math_8c-source.html">math.c</a>.
</div>
</div><p>
<a class="anchor" name="g468e83ca4de52ed839978d48f5dbe111"></a><!-- doxytag: member="alleggl.h::allegro_gl_GLfloat_to_MATRIX" ref="g468e83ca4de52ed839978d48f5dbe111" args="(GLfloat gl[16], MATRIX *m)" -->
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<td class="memname">void allegro_gl_GLfloat_to_MATRIX </td>
<td>(</td>
<td class="paramtype">GLfloat </td>
<td class="paramname"> <em>gl</em>[16], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">MATRIX * </td>
<td class="paramname"> <em>m</em></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td width="100%"></td>
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</table>
</div>
<div class="memdoc">
<p>
Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro fixed-point matrix.
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__math.html#g4cf4f453cb3f95a1e7e861a7401b4a8d" title="Converts an Allegro fixed-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#gee6cb48f8e3e70abecc6c282a8ea1edc" title="Converts an Allegro fixed-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#ge8e0ee18b9aeca955402be16de6ca79d" title="Converts an Allegro floating-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#gb93f3588ea08b048f418023aa76cb3fc" title="Converts an Allegro floating-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#g68e2e0e9dcdba42004070a5f8f547994" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX()</a> <p>
<a class="el" href="group__math.html#g08692466ae37d7888bbd5f5ee5aa9268" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#ga6b729a9e93e249a8a76e078e94a2b44" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX_f()</a> </dd></dl>
<p>
Definition at line <a class="el" href="math_8c-source.html#l00143">143</a> of file <a class="el" href="math_8c-source.html">math.c</a>.
</div>
</div><p>
<a class="anchor" name="g68e2e0e9dcdba42004070a5f8f547994"></a><!-- doxytag: member="alleggl.h::allegro_gl_GLdouble_to_MATRIX" ref="g68e2e0e9dcdba42004070a5f8f547994" args="(GLdouble gl[16], MATRIX *m)" -->
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<td class="memname">void allegro_gl_GLdouble_to_MATRIX </td>
<td>(</td>
<td class="paramtype">GLdouble </td>
<td class="paramname"> <em>gl</em>[16], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">MATRIX * </td>
<td class="paramname"> <em>m</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td width="100%"></td>
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</div>
<div class="memdoc">
<p>
Converts an OpenGL double precision floating-point matrix issued from the matrix stack to an Allegro fixed-point matrix.
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__math.html#g4cf4f453cb3f95a1e7e861a7401b4a8d" title="Converts an Allegro fixed-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#gee6cb48f8e3e70abecc6c282a8ea1edc" title="Converts an Allegro fixed-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#ge8e0ee18b9aeca955402be16de6ca79d" title="Converts an Allegro floating-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#gb93f3588ea08b048f418023aa76cb3fc" title="Converts an Allegro floating-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#g08692466ae37d7888bbd5f5ee5aa9268" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#ga6b729a9e93e249a8a76e078e94a2b44" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#g468e83ca4de52ed839978d48f5dbe111" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX()</a> </dd></dl>
<p>
Definition at line <a class="el" href="math_8c-source.html#l00159">159</a> of file <a class="el" href="math_8c-source.html">math.c</a>.
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<a class="anchor" name="g08692466ae37d7888bbd5f5ee5aa9268"></a><!-- doxytag: member="alleggl.h::allegro_gl_GLfloat_to_MATRIX_f" ref="g08692466ae37d7888bbd5f5ee5aa9268" args="(GLfloat gl[16], MATRIX_f *m)" -->
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<td class="memname">void allegro_gl_GLfloat_to_MATRIX_f </td>
<td>(</td>
<td class="paramtype">GLfloat </td>
<td class="paramname"> <em>gl</em>[16], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">MATRIX_f * </td>
<td class="paramname"> <em>m</em></td><td> </td>
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<td></td>
<td>)</td>
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<p>
Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro floating-point matrix.
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__math.html#g4cf4f453cb3f95a1e7e861a7401b4a8d" title="Converts an Allegro fixed-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#gee6cb48f8e3e70abecc6c282a8ea1edc" title="Converts an Allegro fixed-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#ge8e0ee18b9aeca955402be16de6ca79d" title="Converts an Allegro floating-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#gb93f3588ea08b048f418023aa76cb3fc" title="Converts an Allegro floating-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#g68e2e0e9dcdba42004070a5f8f547994" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX()</a> <p>
<a class="el" href="group__math.html#ga6b729a9e93e249a8a76e078e94a2b44" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#g468e83ca4de52ed839978d48f5dbe111" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX()</a> </dd></dl>
<p>
Definition at line <a class="el" href="math_8c-source.html#l00175">175</a> of file <a class="el" href="math_8c-source.html">math.c</a>.
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<a class="anchor" name="ga6b729a9e93e249a8a76e078e94a2b44"></a><!-- doxytag: member="alleggl.h::allegro_gl_GLdouble_to_MATRIX_f" ref="ga6b729a9e93e249a8a76e078e94a2b44" args="(GLdouble gl[16], MATRIX_f *m)" -->
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<td class="memname">void allegro_gl_GLdouble_to_MATRIX_f </td>
<td>(</td>
<td class="paramtype">GLdouble </td>
<td class="paramname"> <em>gl</em>[16], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">MATRIX_f * </td>
<td class="paramname"> <em>m</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td width="100%"></td>
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<div class="memdoc">
<p>
Converts an OpenGL double precision floating-point matrix issued from the matrix stack to an Allegro single-precision floating-point matrix.
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__math.html#g4cf4f453cb3f95a1e7e861a7401b4a8d" title="Converts an Allegro fixed-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#gee6cb48f8e3e70abecc6c282a8ea1edc" title="Converts an Allegro fixed-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#ge8e0ee18b9aeca955402be16de6ca79d" title="Converts an Allegro floating-point matrix to an array of floats suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLfloat()</a> <p>
<a class="el" href="group__math.html#gb93f3588ea08b048f418023aa76cb3fc" title="Converts an Allegro floating-point matrix to an array of doubles suitable for OpenGL's...">allegro_gl_MATRIX_f_to_GLdouble()</a> <p>
<a class="el" href="group__math.html#g68e2e0e9dcdba42004070a5f8f547994" title="Converts an OpenGL double precision floating-point matrix issued from the matrix...">allegro_gl_GLdouble_to_MATRIX()</a> <p>
<a class="el" href="group__math.html#g08692466ae37d7888bbd5f5ee5aa9268" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX_f()</a> <p>
<a class="el" href="group__math.html#g468e83ca4de52ed839978d48f5dbe111" title="Converts an OpenGL floating-point matrix issued from the matrix stack to an Allegro...">allegro_gl_GLfloat_to_MATRIX()</a> </dd></dl>
<p>
Definition at line <a class="el" href="math_8c-source.html#l00192">192</a> of file <a class="el" href="math_8c-source.html">math.c</a>.
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<a class="anchor" name="ga83a678516d8a7a5503a2b0c9014cb64"></a><!-- doxytag: member="alleggl.h::allegro_gl_apply_quat" ref="ga83a678516d8a7a5503a2b0c9014cb64" args="(QUAT *q)" -->
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<td class="memname">void allegro_gl_apply_quat </td>
<td>(</td>
<td class="paramtype">QUAT * </td>
<td class="paramname"> <em>q</em> </td>
<td> ) </td>
<td width="100%"></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Multiplies the Quaternion to the current transformation matrix, by converting it to a call to glRotatef().
<p>
<b>Example:</b> <pre>
QUAT q = identity_quat;
get_vector_rotation_quat(&q, itofix(1), 0, itofix(1), ftofix(43.83));
glLoadIdentity();
allegro_gl_apply_quat(&q);
</pre><p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__math.html#gb00b667363181a8f0853121170bebaca" title="Converts a quaternion to a vector/angle, which can be used with glRotate*().">allegro_gl_quat_to_glrotatef()</a>, <a class="el" href="group__math.html#g956160418e1c0c37143dd3cee54477ce" title="Converts a quaternion to a vector/angle, which can be used with glRotate*().">allegro_gl_quat_to_glrotated()</a></dd></dl>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>q</em> </td><td>The Quaternion to apply. </td></tr>
</table>
</dl>
<p>
Definition at line <a class="el" href="math_8c-source.html#l00222">222</a> of file <a class="el" href="math_8c-source.html">math.c</a>.
<p>
References <a class="el" href="alleggl_8c-source.html#l00037">__allegro_gl_valid_context</a>, and <a class="el" href="math_8c-source.html#l00199">RAD_2_DEG</a>.
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</div><p>
<a class="anchor" name="gb00b667363181a8f0853121170bebaca"></a><!-- doxytag: member="alleggl.h::allegro_gl_quat_to_glrotatef" ref="gb00b667363181a8f0853121170bebaca" args="(QUAT *q, float *angle, float *x, float *y, float *z)" -->
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<td class="memname">void allegro_gl_quat_to_glrotatef </td>
<td>(</td>
<td class="paramtype">QUAT * </td>
<td class="paramname"> <em>q</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float * </td>
<td class="paramname"> <em>angle</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float * </td>
<td class="paramname"> <em>x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float * </td>
<td class="paramname"> <em>y</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float * </td>
<td class="paramname"> <em>z</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td width="100%"></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Converts a quaternion to a vector/angle, which can be used with glRotate*().
<p>
Values are returned in the parameters.<p>
<b>Example:</b> <pre>
QUAT q = identity_quat;
float x, y, z, angle;
allegro_gl_quat_to_glrotatef(&q, &angle, &x, &y, &z);
glRotatef(angle, x, y, z);
</pre><p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__math.html#g956160418e1c0c37143dd3cee54477ce" title="Converts a quaternion to a vector/angle, which can be used with glRotate*().">allegro_gl_quat_to_glrotated()</a>, <a class="el" href="group__math.html#ga83a678516d8a7a5503a2b0c9014cb64" title="Multiplies the Quaternion to the current transformation matrix, by converting it...">allegro_gl_apply_quat()</a></dd></dl>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>q</em> </td><td>The Quaternion to convert. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>angle</em> </td><td>The angle of rotation, in degrees. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>x</em> </td><td>The rotation vector's x-axis component. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>y</em> </td><td>The rotation vector's y-axis component. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>z</em> </td><td>The rotation vector's z-axis component. </td></tr>
</table>
</dl>
<p>
Definition at line <a class="el" href="math_8c-source.html#l00258">258</a> of file <a class="el" href="math_8c-source.html">math.c</a>.
<p>
References <a class="el" href="math_8c-source.html#l00199">RAD_2_DEG</a>.
</div>
</div><p>
<a class="anchor" name="g956160418e1c0c37143dd3cee54477ce"></a><!-- doxytag: member="alleggl.h::allegro_gl_quat_to_glrotated" ref="g956160418e1c0c37143dd3cee54477ce" args="(QUAT *q, double *angle, double *x, double *y, double *z)" -->
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<td class="memname">void allegro_gl_quat_to_glrotated </td>
<td>(</td>
<td class="paramtype">QUAT * </td>
<td class="paramname"> <em>q</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double * </td>
<td class="paramname"> <em>angle</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double * </td>
<td class="paramname"> <em>x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double * </td>
<td class="paramname"> <em>y</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double * </td>
<td class="paramname"> <em>z</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td width="100%"></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Converts a quaternion to a vector/angle, which can be used with glRotate*().
<p>
Values are returned in the parameters. See allegro_gl_quat_to_rotatef() for an example.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__math.html#gb00b667363181a8f0853121170bebaca" title="Converts a quaternion to a vector/angle, which can be used with glRotate*().">allegro_gl_quat_to_glrotatef()</a>, <a class="el" href="group__math.html#ga83a678516d8a7a5503a2b0c9014cb64" title="Multiplies the Quaternion to the current transformation matrix, by converting it...">allegro_gl_apply_quat()</a></dd></dl>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>q</em> </td><td>The Quaternion to convert. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>angle</em> </td><td>The angle of rotation, in degrees. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>x</em> </td><td>The rotation vector's x-axis component. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>y</em> </td><td>The rotation vector's y-axis component. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>z</em> </td><td>The rotation vector's z-axis component. </td></tr>
</table>
</dl>
<p>
Definition at line <a class="el" href="math_8c-source.html#l00290">290</a> of file <a class="el" href="math_8c-source.html">math.c</a>.
<p>
References <a class="el" href="math_8c-source.html#l00199">RAD_2_DEG</a>.
</div>
</div><p>
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