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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>mialm Reference Manual: Camera</title>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="10"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> 
                  <a href="#mialm-MiaCamera.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> 
                  <a href="#mialm-MiaCamera.object-hierarchy" class="shortcut">Object Hierarchy</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="ch01.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="ch01.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="mialm-MiaLandmark.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="mialm-MiaCamera"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="mialm-MiaCamera.top_of_page"></a>Camera</span></h2>
<p>Camera — A camera description for 3D views</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="mialm-MiaCamera.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">MiaCamera</span> *
</td>
<td class="function_name">
<a class="link" href="mialm-MiaCamera.html#mia-camera-new" title="mia_camera_new ()">mia_camera_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="mialm-MiaCamera.html#mia-camera-test" title="mia_camera_test ()">mia_camera_test</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gfloat</span>
</td>
<td class="function_name">
<a class="link" href="mialm-MiaCamera.html#mia-camera-get-zoom" title="mia_camera_get_zoom ()">mia_camera_get_zoom</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="mialm-MiaCamera.html#mia-camera-set-zoom" title="mia_camera_set_zoom ()">mia_camera_set_zoom</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="mialm-MiaVector3d.html#MiaVector3d" title="struct MiaVector3d"><span class="returnvalue">MiaVector3d</span></a> *
</td>
<td class="function_name">
<a class="link" href="mialm-MiaCamera.html#mia-camera-get-location" title="mia_camera_get_location ()">mia_camera_get_location</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="mialm-MiaCamera.html#mia-camera-set-location" title="mia_camera_set_location ()">mia_camera_set_location</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="mialm-MiaQuaternion.html#MiaQuaternion" title="struct MiaQuaternion"><span class="returnvalue">MiaQuaternion</span></a> *
</td>
<td class="function_name">
<a class="link" href="mialm-MiaCamera.html#mia-camera-get-rotation" title="mia_camera_get_rotation ()">mia_camera_get_rotation</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="mialm-MiaCamera.html#mia-camera-set-rotation" title="mia_camera_set_rotation ()">mia_camera_set_rotation</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gfloat</span>
</td>
<td class="function_name">
<a class="link" href="mialm-MiaCamera.html#mia-camera-get-dist" title="mia_camera_get_dist ()">mia_camera_get_dist</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="mialm-MiaCamera.html#mia-camera-set-dist" title="mia_camera_set_dist ()">mia_camera_set_dist</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">MiaCamera</span> *
</td>
<td class="function_name">
<a class="link" href="mialm-MiaCamera.html#mia-camera-dup" title="mia_camera_dup ()">mia_camera_dup</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">MiaCamera</span> *
</td>
<td class="function_name">
<a class="link" href="mialm-MiaCamera.html#mia-camera-copy" title="mia_camera_copy ()">mia_camera_copy</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="mialm-MiaCamera.html#mia-camera-xmlio-write" title="mia_camera_xmlio_write ()">mia_camera_xmlio_write</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="mialm-MiaCamera.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="mialm-MiaCamera.html#MiaCameraClass" title="struct MiaCameraClass">MiaCameraClass</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="mialm-MiaCamera.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">
</pre>
</div>
<div class="refsect1">
<a name="mialm-MiaCamera.description"></a><h2>Description</h2>
<p><span class="type">MiaCamera</span> descibes a point of view within a 3D volume, i.e. 
camera location, view direction, and zoom are stored within this class and 
manipulated by the corresponding functions.</p>
</div>
<div class="refsect1">
<a name="mialm-MiaCamera.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="mia-camera-new"></a><h3>mia_camera_new ()</h3>
<pre class="programlisting"><span class="returnvalue">MiaCamera</span> *
mia_camera_new (<em class="parameter"><code><a class="link" href="mialm-MiaVector3d.html#MiaVector3d" title="struct MiaVector3d"><span class="type">MiaVector3d</span></a> *loc</code></em>,
                <em class="parameter"><code><a class="link" href="mialm-MiaQuaternion.html#MiaQuaternion" title="struct MiaQuaternion"><span class="type">MiaQuaternion</span></a> *rot</code></em>,
                <em class="parameter"><code><span class="type">gfloat</span> zoom</code></em>);</pre>
<p>Create a camera defined by its position, heading, distance and   
 zoom. The created object must be destroyed by calling <code class="function">g_object_unref()</code></p>
<p> For some reason I can not remember, the location z value is ignored and 
 the distance value is given separately.</p>
<div class="refsect3">
<a name="id-1.2.2.7.2.6"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>loc</p></td>
<td class="parameter_description"><p>The camera location, z is ignored  </p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>rot</p></td>
<td class="parameter_description"><p>the rotation angle </p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>zoom</p></td>
<td class="parameter_description"><p>camera zoom into the field of view </p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.7.2.7"></a><h4>Returns</h4>
<p> a newly created quaternion</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="mia-camera-test"></a><h3>mia_camera_test ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
mia_camera_test (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Run some tests on the camera (not impmented)</p>
<div class="refsect3">
<a name="id-1.2.2.7.3.5"></a><h4>Returns</h4>
<p> TRUE if tests were successful</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="mia-camera-get-zoom"></a><h3>mia_camera_get_zoom ()</h3>
<pre class="programlisting"><span class="returnvalue">gfloat</span>
mia_camera_get_zoom (<em class="parameter"><code>const <span class="type">MiaCamera</span> *self</code></em>);</pre>
<p>Get the current zoom value of the camera</p>
<div class="refsect3">
<a name="id-1.2.2.7.4.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>self</p></td>
<td class="parameter_description"><p>the camera </p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.7.4.6"></a><h4>Returns</h4>
<p> zoom </p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="mia-camera-set-zoom"></a><h3>mia_camera_set_zoom ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
mia_camera_set_zoom (<em class="parameter"><code><span class="type">MiaCamera</span> *self</code></em>,
                     <em class="parameter"><code><span class="type">gfloat</span> zoom</code></em>);</pre>
<p>sets the new zoom of the camera (i.e. change field of view)</p>
<div class="refsect3">
<a name="id-1.2.2.7.5.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>self</p></td>
<td class="parameter_description"><p>the camera </p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>zoom</p></td>
<td class="parameter_description"><p>the new zoom value for the camera </p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="mia-camera-get-location"></a><h3>mia_camera_get_location ()</h3>
<pre class="programlisting"><a class="link" href="mialm-MiaVector3d.html#MiaVector3d" title="struct MiaVector3d"><span class="returnvalue">MiaVector3d</span></a> *
mia_camera_get_location (<em class="parameter"><code>const <span class="type">MiaCamera</span> *self</code></em>);</pre>
<p>get current location of the camera (note that the z value is equal to the distance)</p>
<div class="refsect3">
<a name="id-1.2.2.7.6.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>self</p></td>
<td class="parameter_description"><p>the camera </p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.7.6.6"></a><h4>Returns</h4>
<p> location </p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="mia-camera-set-location"></a><h3>mia_camera_set_location ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
mia_camera_set_location (<em class="parameter"><code><span class="type">MiaCamera</span> *self</code></em>,
                         <em class="parameter"><code><a class="link" href="mialm-MiaVector3d.html#MiaVector3d" title="struct MiaVector3d"><span class="type">MiaVector3d</span></a> *loc</code></em>);</pre>
<p>Set the new location of the camera</p>
<div class="refsect3">
<a name="id-1.2.2.7.7.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>self</p></td>
<td class="parameter_description"><p>the camera </p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>loc</p></td>
<td class="parameter_description"><p>new location of the camera </p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="mia-camera-get-rotation"></a><h3>mia_camera_get_rotation ()</h3>
<pre class="programlisting"><a class="link" href="mialm-MiaQuaternion.html#MiaQuaternion" title="struct MiaQuaternion"><span class="returnvalue">MiaQuaternion</span></a> *
mia_camera_get_rotation (<em class="parameter"><code>const <span class="type">MiaCamera</span> *self</code></em>);</pre>
<p>get the current view directopn of the camera as a rotation described by a MiaQuaternion</p>
<div class="refsect3">
<a name="id-1.2.2.7.8.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>self</p></td>
<td class="parameter_description"><p>the camera </p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.7.8.6"></a><h4>Returns</h4>
<p> Quaternion describing the camera rotation </p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="mia-camera-set-rotation"></a><h3>mia_camera_set_rotation ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
mia_camera_set_rotation (<em class="parameter"><code><span class="type">MiaCamera</span> *self</code></em>,
                         <em class="parameter"><code><a class="link" href="mialm-MiaQuaternion.html#MiaQuaternion" title="struct MiaQuaternion"><span class="type">MiaQuaternion</span></a> *rot</code></em>);</pre>
<p>sets the current view direction of the camera as a rotation described by a MiaQuaternion</p>
<div class="refsect3">
<a name="id-1.2.2.7.9.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>self</p></td>
<td class="parameter_description"><p>the camera </p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>rot</p></td>
<td class="parameter_description"><p>new rotation of the camera position around the center of the universe</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="mia-camera-get-dist"></a><h3>mia_camera_get_dist ()</h3>
<pre class="programlisting"><span class="returnvalue">gfloat</span>
mia_camera_get_dist (<em class="parameter"><code>const <span class="type">MiaCamera</span> *self</code></em>);</pre>
<p>Evaluate the distance of the camera from the center of the universe (0,0,0)</p>
<div class="refsect3">
<a name="id-1.2.2.7.10.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>self</p></td>
<td class="parameter_description"><p>the camera </p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.7.10.6"></a><h4>Returns</h4>
<p> the distance </p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="mia-camera-set-dist"></a><h3>mia_camera_set_dist ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
mia_camera_set_dist (<em class="parameter"><code><span class="type">MiaCamera</span> *self</code></em>,
                     <em class="parameter"><code><span class="type">gfloat</span> dist</code></em>);</pre>
<p>Sets the new distance to the center (0,0,0), can also be achieved by setting the full location</p>
<div class="refsect3">
<a name="id-1.2.2.7.11.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>self</p></td>
<td class="parameter_description"><p>the camera </p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>dist</p></td>
<td class="parameter_description"><p>new distance to the center of the universe </p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="mia-camera-dup"></a><h3>mia_camera_dup ()</h3>
<pre class="programlisting"><span class="returnvalue">MiaCamera</span> *
mia_camera_dup (<em class="parameter"><code><span class="type">MiaCamera</span> *orig</code></em>);</pre>
<p>Create a newly created duplicate of a MiaCamera. The returned camera 
must be freed by calling <code class="function">g_object_unref()</code></p>
<div class="refsect3">
<a name="id-1.2.2.7.12.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>orig</p></td>
<td class="parameter_description"><p>camera to be copied </p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.7.12.6"></a><h4>Returns</h4>
<p> the copy of the camera</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="mia-camera-copy"></a><h3>mia_camera_copy ()</h3>
<pre class="programlisting"><span class="returnvalue">MiaCamera</span> *
mia_camera_copy (<em class="parameter"><code><span class="type">MiaCamera</span> *dest</code></em>,
                 <em class="parameter"><code>const <span class="type">MiaCamera</span> *orig</code></em>);</pre>
<p>Copy a MiaCamera to an already created instance,</p>
<div class="refsect3">
<a name="id-1.2.2.7.13.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>dest</p></td>
<td class="parameter_description"><p>destination object </p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>orig</p></td>
<td class="parameter_description"><p>original object to be copied </p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.7.13.6"></a><h4>Returns</h4>
<p> the copy of the camera</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="mia-camera-xmlio-write"></a><h3>mia_camera_xmlio_write ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
mia_camera_xmlio_write (<em class="parameter"><code><span class="type">xmlNodePtr</span> root</code></em>,
                        <em class="parameter"><code><span class="type">xmlNsPtr</span> ns</code></em>,
                        <em class="parameter"><code>const <span class="type">gchar</span> *tag</code></em>,
                        <em class="parameter"><code>const <span class="type">MiaCamera</span> *c</code></em>);</pre>
<p>Write the MiaCamera instance to an XML node</p>
<div class="refsect3">
<a name="id-1.2.2.7.14.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>root</p></td>
<td class="parameter_description"><p>XML node to attach the camera description to </p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>ns</p></td>
<td class="parameter_description"><p>XML namespace </p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>tag</p></td>
<td class="parameter_description"><p>XML tag to use to create the XML node.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>c</p></td>
<td class="parameter_description"><p>the camera to store </p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.7.14.6"></a><h4>Returns</h4>
<p> true if the camera was sucessfully written nor c==NULL</p>
<p></p>
</div>
</div>
</div>
<div class="refsect1">
<a name="mialm-MiaCamera.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="MiaCameraClass"></a><h3>struct MiaCameraClass</h3>
<pre class="programlisting">struct MiaCameraClass {
};
</pre>
<p>GObject class type for the MiaCamera</p>
</div>
</div>
</div>
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