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|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#v-sim-view.description" class="shortcut">Description</a>
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<h2><span class="refentrytitle"><a name="v-sim-view.top_of_page"></a>view</span></h2>
<p>view — Defines all necessary informations for the
rendering of a view.</p>
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<div class="refsynopsisdiv" title="Synopsis">
<a name="v-sim-view.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">#define <a class="link" href="v-sim-view.html#PI180:CAPS" title="PI180">PI180</a>
<a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView">VisuOpenGLView</a>;
<a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera">VisuOpenGLCamera</a>;
enum <a class="link" href="v-sim-view.html#ViewAxis" title="enum ViewAxis">ViewAxis</a>;
#define <a class="link" href="v-sim-view.html#VISU-CAMERA-THETA:CAPS" title="VISU_CAMERA_THETA">VISU_CAMERA_THETA</a>
#define <a class="link" href="v-sim-view.html#VISU-CAMERA-PHI:CAPS" title="VISU_CAMERA_PHI">VISU_CAMERA_PHI</a>
#define <a class="link" href="v-sim-view.html#VISU-CAMERA-OMEGA:CAPS" title="VISU_CAMERA_OMEGA">VISU_CAMERA_OMEGA</a>
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="v-sim-view.html#openGLCameraSet-thetaPhiOmega" title="openGLCameraSet_thetaPhiOmega ()">openGLCameraSet_thetaPhiOmega</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><span class="type">float</span> valueTheta</code></em>,
<em class="parameter"><code><span class="type">float</span> valuePhi</code></em>,
<em class="parameter"><code><span class="type">float</span> valueOmega</code></em>,
<em class="parameter"><code><span class="type">int</span> mask</code></em>);
#define <a class="link" href="v-sim-view.html#MASK-XS:CAPS" title="MASK_XS">MASK_XS</a>
#define <a class="link" href="v-sim-view.html#MASK-YS:CAPS" title="MASK_YS">MASK_YS</a>
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="v-sim-view.html#openGLCameraSet-XsYs" title="openGLCameraSet_XsYs ()">openGLCameraSet_XsYs</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><span class="type">float</span> valueX</code></em>,
<em class="parameter"><code><span class="type">float</span> valueY</code></em>,
<em class="parameter"><code><span class="type">int</span> mask</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="v-sim-view.html#openGLCameraSet-gross" title="openGLCameraSet_gross ()">openGLCameraSet_gross</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><span class="type">float</span> value</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="v-sim-view.html#openGLCameraSet-persp" title="openGLCameraSet_persp ()">openGLCameraSet_persp</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><span class="type">float</span> value</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="v-sim-view.html#openGLCameraSet-refLength" title="openGLCameraSet_refLength ()">openGLCameraSet_refLength</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><span class="type">float</span> value</code></em>,
<em class="parameter"><code><a class="link" href="v-sim-toolPhysic.html#ToolUnits" title="enum ToolUnits"><span class="type">ToolUnits</span></a> unit</code></em>);
<span class="returnvalue">float</span> <a class="link" href="v-sim-view.html#openGLCameraGet-refLength" title="openGLCameraGet_refLength ()">openGLCameraGet_refLength</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><a class="link" href="v-sim-toolPhysic.html#ToolUnits" title="enum ToolUnits"><span class="type">ToolUnits</span></a> *unit</code></em>);
<a class="link" href="v-sim-view.html#OpenGLWindow" title="OpenGLWindow">OpenGLWindow</a>;
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="v-sim-view.html#openGLWindowSet-viewport" title="openGLWindowSet_viewport ()">openGLWindowSet_viewport</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#OpenGLWindow" title="OpenGLWindow"><span class="type">OpenGLWindow</span></a> *window</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> width</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> height</code></em>);
<span class="returnvalue">float</span> <a class="link" href="v-sim-view.html#VisuOpenGLViewGet-fileUnitPerPixel" title="VisuOpenGLViewGet_fileUnitPerPixel ()">VisuOpenGLViewGet_fileUnitPerPixel</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>);
<span class="returnvalue">void</span> <a class="link" href="v-sim-view.html#VisuOpenGLViewGet-screenAxes" title="VisuOpenGLViewGet_screenAxes ()">VisuOpenGLViewGet_screenAxes</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>,
<em class="parameter"><code><span class="type">float</span> xAxis[3]</code></em>,
<em class="parameter"><code><span class="type">float</span> yAxis[3]</code></em>);
<span class="returnvalue">float</span> <a class="link" href="v-sim-view.html#openGLViewGet-zCoordinate" title="openGLViewGet_zCoordinate ()">openGLViewGet_zCoordinate</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>,
<em class="parameter"><code><span class="type">float</span> xyz[3]</code></em>);
<span class="returnvalue">void</span> <a class="link" href="v-sim-view.html#openGLViewGet-realCoordinates" title="openGLViewGet_realCoordinates ()">openGLViewGet_realCoordinates</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>,
<em class="parameter"><code><span class="type">float</span> xyz[3]</code></em>,
<em class="parameter"><code><span class="type">float</span> winx</code></em>,
<em class="parameter"><code><span class="type">float</span> winy</code></em>,
<em class="parameter"><code><span class="type">float</span> winz</code></em>);
<span class="returnvalue">void</span> <a class="link" href="v-sim-view.html#openGLViewSet-upAxis" title="openGLViewSet_upAxis ()">openGLViewSet_upAxis</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>,
<em class="parameter"><code><a class="link" href="v-sim-view.html#ViewAxis" title="enum ViewAxis"><span class="type">ViewAxis</span></a> upAxis</code></em>);
<a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="returnvalue">VisuOpenGLView</span></a>* <a class="link" href="v-sim-view.html#VisuOpenGLViewNew" title="VisuOpenGLViewNew ()">VisuOpenGLViewNew</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
<span class="returnvalue">void</span> <a class="link" href="v-sim-view.html#VisuOpenGLViewFree" title="VisuOpenGLViewFree ()">VisuOpenGLViewFree</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>);
<a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="returnvalue">VisuOpenGLView</span></a>* <a class="link" href="v-sim-view.html#VisuOpenGLViewCopy" title="VisuOpenGLViewCopy ()">VisuOpenGLViewCopy</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> <a class="link" href="v-sim-view.html#VisuOpenGLCameraGet-numberOfFacettes" title="VisuOpenGLCameraGet_numberOfFacettes ()">VisuOpenGLCameraGet_numberOfFacettes</a>
(<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> winSize</code></em>,
<em class="parameter"><code><span class="type">float</span> dimension</code></em>);
<span class="returnvalue">void</span> <a class="link" href="v-sim-view.html#openGLProject" title="openGLProject ()">openGLProject</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#OpenGLWindow" title="OpenGLWindow"><span class="type">OpenGLWindow</span></a> *window</code></em>,
<em class="parameter"><code>const <a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><span class="type">float</span> extens</code></em>);
<span class="returnvalue">void</span> <a class="link" href="v-sim-view.html#openGLModelize" title="openGLModelize ()">openGLModelize</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>);
<span class="returnvalue">int</span> <a class="link" href="v-sim-view.html#VisuOpenGLViewSet-precision" title="VisuOpenGLViewSet_precision ()">VisuOpenGLViewSet_precision</a> (<em class="parameter"><code><span class="type">float</span> value</code></em>);
<span class="returnvalue">float</span> <a class="link" href="v-sim-view.html#VisuOpenGLViewGet-precision" title="VisuOpenGLViewGet_precision ()">VisuOpenGLViewGet_precision</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
<span class="returnvalue">void</span> <a class="link" href="v-sim-view.html#openGLViewRotate-box" title="openGLViewRotate_box ()">openGLViewRotate_box</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>,
<em class="parameter"><code><span class="type">float</span> dTheta</code></em>,
<em class="parameter"><code><span class="type">float</span> dPhi</code></em>,
<em class="parameter"><code><span class="type">float</span> angles[2]</code></em>);
<span class="returnvalue">void</span> <a class="link" href="v-sim-view.html#openGLViewRotate-camera" title="openGLViewRotate_camera ()">openGLViewRotate_camera</a> (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>,
<em class="parameter"><code><span class="type">float</span> dTheta</code></em>,
<em class="parameter"><code><span class="type">float</span> dPhi</code></em>,
<em class="parameter"><code><span class="type">float</span> angles[3]</code></em>);
<span class="returnvalue">void</span> <a class="link" href="v-sim-view.html#VisuOpenGLViewInit" title="VisuOpenGLViewInit ()">VisuOpenGLViewInit</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
</pre>
</div>
<div class="refsect1" title="Description">
<a name="v-sim-view.description"></a><h2>Description</h2>
<p>
</p>
<p>The <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> stores three basic informations: one for the
position and orientation of the camera (<a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a>), one for the
description of the bounding box in the OpenGL coordinates
(<a href="v-sim-view.html#OpenGLBox"><span class="type">OpenGLBox</span></a>, should be moved elsewhere later) and one last for the
definition of the viewing window (<a class="link" href="v-sim-view.html#OpenGLWindow" title="OpenGLWindow"><span class="type">OpenGLWindow</span></a>, including volumic
informations).</p>
<p>
</p>
<p>
</p>
<p>One resource is used by this part, defining the precision
desired by the user when drawing OpenGL objects. This precision can
be changed using <a class="link" href="v-sim-view.html#VisuOpenGLViewSet-precision" title="VisuOpenGLViewSet_precision ()"><code class="function">VisuOpenGLViewSet_precision()</code></a> and all V_Sim part
drawing something should use <a class="link" href="v-sim-view.html#VisuOpenGLCameraGet-numberOfFacettes" title="VisuOpenGLCameraGet_numberOfFacettes ()"><code class="function">VisuOpenGLCameraGet_numberOfFacettes()</code></a> to
know the size of the vertices to be drawn depending on this
precision and the level of zoom.</p>
<p>
</p>
<p>
</p>
<p>The rendering is done in an OpenGl viewport whose size is
given by the bounding box (plus 10%). The camera can be positionned
with three angles (theta, phi and omega) and has a zoom factor
(gross) and a perspective value (d_red). The angle theta is around
the z axis (box coordinates), phi is around the new x axis (after
the theta rotation) and omega is a rotation around the axis which
goes from the observer to the center of the bounding box. By
default the camera looks at the center of the bounding box but this
can be changed with the Xs and Ys parameters. These values are
stored and are readable through the <a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> structure. They
must be changed with the following methods :
<a href="v-sim-view.html#openGLViewSet-thetaPhiOmega"><code class="function">openGLViewSet_thetaPhiOmega()</code></a>, <a href="v-sim-view.html#openGLViewSet-gross"><code class="function">openGLViewSet_gross()</code></a>,
<a href="v-sim-view.html#openGLViewSet-persp"><code class="function">openGLViewSet_persp()</code></a> and <a href="v-sim-view.html#openGLViewSet-XsYs"><code class="function">openGLViewSet_XsYs()</code></a>.</p>
<p>
</p>
</div>
<div class="refsect1" title="Details">
<a name="v-sim-view.details"></a><h2>Details</h2>
<div class="refsect2" title="PI180">
<a name="PI180:CAPS"></a><h3>PI180</h3>
<pre class="programlisting">#define PI180 0.017453292522
</pre>
<p>
Value of pi / 180.
</p>
</div>
<hr>
<div class="refsect2" title="VisuOpenGLView">
<a name="VisuOpenGLView"></a><h3>VisuOpenGLView</h3>
<pre class="programlisting">typedef struct {
VisuOpenGLCamera *camera;
OpenGLWindow *window;
} VisuOpenGLView;
</pre>
<p>
A container structure to deal with OpenGL observer position, size of rendering
viewport...
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *<em class="structfield"><code><a name="VisuOpenGLView.camera"></a>camera</code></em>;</span></p></td>
<td>a <a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> structure;
</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="v-sim-view.html#OpenGLWindow" title="OpenGLWindow"><span class="type">OpenGLWindow</span></a> *<em class="structfield"><code><a name="VisuOpenGLView.window"></a>window</code></em>;</span></p></td>
<td>a <a class="link" href="v-sim-view.html#OpenGLWindow" title="OpenGLWindow"><span class="type">OpenGLWindow</span></a> structure;
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="VisuOpenGLCamera">
<a name="VisuOpenGLCamera"></a><h3>VisuOpenGLCamera</h3>
<pre class="programlisting">typedef struct {
/* Perspective. */
double d_red;
/* Orientation. */
double theta, phi, omega;
/* Position. */
double xs, ys;
/* Zoom. */
double gross;
/* A length reference and its unit. */
double length0;
ToolUnits unit;
/* Up vector. */
double up[3];
/* Up axis. */
ViewAxis upAxis;
/* Eye target and eye position. */
double centre[3], eye[3];
} VisuOpenGLCamera;
</pre>
<p>
Values to define the position of the observer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="VisuOpenGLCamera.d-red"></a>d_red</code></em>;</span></p></td>
<td>a factor for perspective from 1. to inifnity. With one, the nose of
the observer is completly set on the rendered object, and the size
of the observer is neglectible compared to the size of the object.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="VisuOpenGLCamera.theta"></a>theta</code></em>;</span></p></td>
<td>the theta angle in spherical coordinates of the position of the observer ;
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="VisuOpenGLCamera.phi"></a>phi</code></em>;</span></p></td>
<td>the phi angle in spherical coordinates of the position of the observer ;
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="VisuOpenGLCamera.omega"></a>omega</code></em>;</span></p></td>
<td>rotation of the observer on itself ;
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="VisuOpenGLCamera.xs"></a>xs</code></em>;</span></p></td>
<td>a value for translation of the viewport on x axis ;
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="VisuOpenGLCamera.ys"></a>ys</code></em>;</span></p></td>
<td>a value for translation of the viewport on y axis ;
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="VisuOpenGLCamera.gross"></a>gross</code></em>;</span></p></td>
<td>a value of zoom ;
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="VisuOpenGLCamera.length0"></a>length0</code></em>;</span></p></td>
<td>a length reference to adimension all values, by default,
this is the longest diagonal of the current box (without
duplication) ;
</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="v-sim-toolPhysic.html#ToolUnits" title="enum ToolUnits"><span class="type">ToolUnits</span></a> <em class="structfield"><code><a name="VisuOpenGLCamera.unit"></a>unit</code></em>;</span></p></td>
<td>the unit of <em class="parameter"><code>length0</code></em>.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="VisuOpenGLCamera.up"></a>up</code></em>[3];</span></p></td>
<td> the current up vector.. <acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>. <acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> fixed-size=3. </td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="v-sim-view.html#ViewAxis" title="enum ViewAxis"><span class="type">ViewAxis</span></a> <em class="structfield"><code><a name="VisuOpenGLCamera.upAxis"></a>upAxis</code></em>;</span></p></td>
<td>which axis define the north pole.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="VisuOpenGLCamera.centre"></a>centre</code></em>[3];</span></p></td>
<td> position of the eye look at ;. <acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>. <acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> fixed-size=3. </td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="VisuOpenGLCamera.eye"></a>eye</code></em>[3];</span></p></td>
<td> position of the eye.. <acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>. <acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> fixed-size=3. </td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="enum ViewAxis">
<a name="ViewAxis"></a><h3>enum ViewAxis</h3>
<pre class="programlisting">typedef enum
{
VIEW_X,
VIEW_Y,
VIEW_Z
} ViewAxis;
</pre>
<p>
Define the up axis.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="VIEW-X:CAPS"></a><span class="term"><code class="literal">VIEW_X</code></span></p></td>
<td>the up axis is X ;
</td>
</tr>
<tr>
<td><p><a name="VIEW-Y:CAPS"></a><span class="term"><code class="literal">VIEW_Y</code></span></p></td>
<td>the up axis is Y ;
</td>
</tr>
<tr>
<td><p><a name="VIEW-Z:CAPS"></a><span class="term"><code class="literal">VIEW_Z</code></span></p></td>
<td>the up axis is Z.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="VISU_CAMERA_THETA">
<a name="VISU-CAMERA-THETA:CAPS"></a><h3>VISU_CAMERA_THETA</h3>
<pre class="programlisting">#define VISU_CAMERA_THETA (1 << 1)
</pre>
<p>
Value used in the <a class="link" href="v-sim-view.html#openGLCameraSet-thetaPhiOmega" title="openGLCameraSet_thetaPhiOmega ()"><code class="function">openGLCameraSet_thetaPhiOmega()</code></a> method to store the tetha angle.
</p>
</div>
<hr>
<div class="refsect2" title="VISU_CAMERA_PHI">
<a name="VISU-CAMERA-PHI:CAPS"></a><h3>VISU_CAMERA_PHI</h3>
<pre class="programlisting">#define VISU_CAMERA_PHI (1 << 2)
</pre>
<p>
Value used in the <a class="link" href="v-sim-view.html#openGLCameraSet-thetaPhiOmega" title="openGLCameraSet_thetaPhiOmega ()"><code class="function">openGLCameraSet_thetaPhiOmega()</code></a> method to store the phi angle.
</p>
</div>
<hr>
<div class="refsect2" title="VISU_CAMERA_OMEGA">
<a name="VISU-CAMERA-OMEGA:CAPS"></a><h3>VISU_CAMERA_OMEGA</h3>
<pre class="programlisting">#define VISU_CAMERA_OMEGA (1 << 3)
</pre>
<p>
Value used in the <a class="link" href="v-sim-view.html#openGLCameraSet-thetaPhiOmega" title="openGLCameraSet_thetaPhiOmega ()"><code class="function">openGLCameraSet_thetaPhiOmega()</code></a> method to store the omega angle.
</p>
</div>
<hr>
<div class="refsect2" title="openGLCameraSet_thetaPhiOmega ()">
<a name="openGLCameraSet-thetaPhiOmega"></a><h3>openGLCameraSet_thetaPhiOmega ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> openGLCameraSet_thetaPhiOmega (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><span class="type">float</span> valueTheta</code></em>,
<em class="parameter"><code><span class="type">float</span> valuePhi</code></em>,
<em class="parameter"><code><span class="type">float</span> valueOmega</code></em>,
<em class="parameter"><code><span class="type">int</span> mask</code></em>);</pre>
<p>
Change the orientation of the camera to the specified angles.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>camera</code></em> :</span></p></td>
<td>a valid <a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> object ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>valueTheta</code></em> :</span></p></td>
<td>a floatinf point value in degrees ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>valuePhi</code></em> :</span></p></td>
<td>a floating point value in degrees ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>valueOmega</code></em> :</span></p></td>
<td>a floating point value in degrees ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mask</code></em> :</span></p></td>
<td>to specified what values will be changed.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE if the signal OpenGLAskForReDraw should be emitted.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="MASK_XS">
<a name="MASK-XS:CAPS"></a><h3>MASK_XS</h3>
<pre class="programlisting">#define MASK_XS (1 << 1)
</pre>
<p>
Value used in the <a class="link" href="v-sim-view.html#openGLCameraSet-XsYs" title="openGLCameraSet_XsYs ()"><code class="function">openGLCameraSet_XsYs()</code></a> method to store the horizontal offset.
</p>
</div>
<hr>
<div class="refsect2" title="MASK_YS">
<a name="MASK-YS:CAPS"></a><h3>MASK_YS</h3>
<pre class="programlisting">#define MASK_YS (1 << 2)
</pre>
<p>
Value used in the <a class="link" href="v-sim-view.html#openGLCameraSet-XsYs" title="openGLCameraSet_XsYs ()"><code class="function">openGLCameraSet_XsYs()</code></a> method to store the vertical offset.
</p>
</div>
<hr>
<div class="refsect2" title="openGLCameraSet_XsYs ()">
<a name="openGLCameraSet-XsYs"></a><h3>openGLCameraSet_XsYs ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> openGLCameraSet_XsYs (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><span class="type">float</span> valueX</code></em>,
<em class="parameter"><code><span class="type">float</span> valueY</code></em>,
<em class="parameter"><code><span class="type">int</span> mask</code></em>);</pre>
<p>
Change the point where the camera is pointed to.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>camera</code></em> :</span></p></td>
<td>a valid <a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> object ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>valueX</code></em> :</span></p></td>
<td>a floatinf point value in the bounding box scale
(1 is the size of the bounding box) ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>valueY</code></em> :</span></p></td>
<td>a floating point value in bounding box scale ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mask</code></em> :</span></p></td>
<td>to specified what values will be changed.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE if the signal OpenGLAskForReDraw should be emitted.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="openGLCameraSet_gross ()">
<a name="openGLCameraSet-gross"></a><h3>openGLCameraSet_gross ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> openGLCameraSet_gross (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><span class="type">float</span> value</code></em>);</pre>
<p>
Change the value of the camera zoom value. If the value is higher than 10
it is set to 10 and if the value is negative it is set to 0.001.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>camera</code></em> :</span></p></td>
<td>a valid <a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> object ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>a positive floating point value.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE if the signal OpenGLAskForReDraw should be emitted.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="openGLCameraSet_persp ()">
<a name="openGLCameraSet-persp"></a><h3>openGLCameraSet_persp ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> openGLCameraSet_persp (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><span class="type">float</span> value</code></em>);</pre>
<p>
Change the value of the camera perspective value and put it in
bounds if needed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>camera</code></em> :</span></p></td>
<td>a valid <a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> object ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>a floating point value greater than 1.1.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE if the signal OpenGLAskForReDraw should be emitted.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="openGLCameraSet_refLength ()">
<a name="openGLCameraSet-refLength"></a><h3>openGLCameraSet_refLength ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> openGLCameraSet_refLength (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><span class="type">float</span> value</code></em>,
<em class="parameter"><code><a class="link" href="v-sim-toolPhysic.html#ToolUnits" title="enum ToolUnits"><span class="type">ToolUnits</span></a> unit</code></em>);</pre>
<p>
Change the reference value that is used for the zoom.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>camera</code></em> :</span></p></td>
<td>a <a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> object.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>a new length.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>unit</code></em> :</span></p></td>
<td>its measurement unit.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE if the value is indeed changed.
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 3.6</p>
</div>
<hr>
<div class="refsect2" title="openGLCameraGet_refLength ()">
<a name="openGLCameraGet-refLength"></a><h3>openGLCameraGet_refLength ()</h3>
<pre class="programlisting"><span class="returnvalue">float</span> openGLCameraGet_refLength (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><a class="link" href="v-sim-toolPhysic.html#ToolUnits" title="enum ToolUnits"><span class="type">ToolUnits</span></a> *unit</code></em>);</pre>
<p>
The zoom is define from a reference length in given unit. If <em class="parameter"><code>unit</code></em>
is provided, the corresponding unit will be set.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>camera</code></em> :</span></p></td>
<td>a <a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> object.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>unit</code></em> :</span></p></td>
<td>a location for unit value (can be NULL).
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the current reference length.
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 3.6</p>
</div>
<hr>
<div class="refsect2" title="OpenGLWindow">
<a name="OpenGLWindow"></a><h3>OpenGLWindow</h3>
<pre class="programlisting">typedef struct {
guint width, height;
double near, far;
double left, right, bottom, top;
} OpenGLWindow;
</pre>
<p>
Values to describe the window where the render is done.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="OpenGLWindow.width"></a>width</code></em>;</span></p></td>
<td>the width of the window ;
</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="OpenGLWindow.height"></a>height</code></em>;</span></p></td>
<td>the height of the window ;
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="OpenGLWindow.near"></a>near</code></em>;</span></p></td>
<td>the beginning of the viewport on z axis (z for observer) ;
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="OpenGLWindow.far"></a>far</code></em>;</span></p></td>
<td>the end of the viewport on z axis (z for observer) ;
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="OpenGLWindow.left"></a>left</code></em>;</span></p></td>
<td>the left of the viewport on x axis ;
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="OpenGLWindow.right"></a>right</code></em>;</span></p></td>
<td>the right of the viewport on x axis ;
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="OpenGLWindow.bottom"></a>bottom</code></em>;</span></p></td>
<td>the bottom of the viewport on y axis ;
</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">double</span> <em class="structfield"><code><a name="OpenGLWindow.top"></a>top</code></em>;</span></p></td>
<td>the top of the viewport on y axis ;
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="openGLWindowSet_viewport ()">
<a name="openGLWindowSet-viewport"></a><h3>openGLWindowSet_viewport ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> openGLWindowSet_viewport (<em class="parameter"><code><a class="link" href="v-sim-view.html#OpenGLWindow" title="OpenGLWindow"><span class="type">OpenGLWindow</span></a> *window</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> width</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> height</code></em>);</pre>
<p>
It changes the size of the OpenGl area and reccompute the OpenGL viewport.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>window</code></em> :</span></p></td>
<td>a valid <a class="link" href="v-sim-view.html#OpenGLWindow" title="OpenGLWindow"><span class="type">OpenGLWindow</span></a> object ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>the new horizontal size ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td>the new vertical size.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE the size of <em class="parameter"><code>window</code></em> is actually changed.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="VisuOpenGLViewGet_fileUnitPerPixel ()">
<a name="VisuOpenGLViewGet-fileUnitPerPixel"></a><h3>VisuOpenGLViewGet_fileUnitPerPixel ()</h3>
<pre class="programlisting"><span class="returnvalue">float</span> VisuOpenGLViewGet_fileUnitPerPixel (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>);</pre>
<p>
This method is used to know the ratio of a pixel with the unit of the file.
WARNING : this method is valid only when the camera is position at infinity.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>view</code></em> :</span></p></td>
<td>a valid <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> object.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> how much of a unit of file is in a pixel.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="VisuOpenGLViewGet_screenAxes ()">
<a name="VisuOpenGLViewGet-screenAxes"></a><h3>VisuOpenGLViewGet_screenAxes ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> VisuOpenGLViewGet_screenAxes (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>,
<em class="parameter"><code><span class="type">float</span> xAxis[3]</code></em>,
<em class="parameter"><code><span class="type">float</span> yAxis[3]</code></em>);</pre>
<p>
This method is used to get the coordinates in box frame of x axis and y axis
of the current camera view.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>view</code></em> :</span></p></td>
<td>a valid <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xAxis</code></em> :</span></p></td>
<td> three float values representing x axis ;. <acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>. <acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> fixed-size=3. </td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>yAxis</code></em> :</span></p></td>
<td> three float values representing y axis.. <acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>. <acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> fixed-size=3. </td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="openGLViewGet_zCoordinate ()">
<a name="openGLViewGet-zCoordinate"></a><h3>openGLViewGet_zCoordinate ()</h3>
<pre class="programlisting"><span class="returnvalue">float</span> openGLViewGet_zCoordinate (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>,
<em class="parameter"><code><span class="type">float</span> xyz[3]</code></em>);</pre>
<p>
Use this routine to know the Z value of a real point defined by
<em class="parameter"><code>xyz</code></em> in caretsian coordinates.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>view</code></em> :</span></p></td>
<td>a <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> object.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xyz</code></em> :</span></p></td>
<td>a cartesian point.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="openGLViewGet_realCoordinates ()">
<a name="openGLViewGet-realCoordinates"></a><h3>openGLViewGet_realCoordinates ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> openGLViewGet_realCoordinates (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>,
<em class="parameter"><code><span class="type">float</span> xyz[3]</code></em>,
<em class="parameter"><code><span class="type">float</span> winx</code></em>,
<em class="parameter"><code><span class="type">float</span> winy</code></em>,
<em class="parameter"><code><span class="type">float</span> winz</code></em>);</pre>
<p>
Use this routine to get the cartesian coordinates in real space of
a point located at <em class="parameter"><code>winx</code></em> and <em class="parameter"><code>winy</code></em> on screen.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>view</code></em> :</span></p></td>
<td>a <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> object.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xyz</code></em> :</span></p></td>
<td>a location to store the result.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>winx</code></em> :</span></p></td>
<td>position on X axis of screen.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>winy</code></em> :</span></p></td>
<td>position on Y axis of screen.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>winz</code></em> :</span></p></td>
<td>height before projection on screen.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="openGLViewSet_upAxis ()">
<a name="openGLViewSet-upAxis"></a><h3>openGLViewSet_upAxis ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> openGLViewSet_upAxis (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>,
<em class="parameter"><code><a class="link" href="v-sim-view.html#ViewAxis" title="enum ViewAxis"><span class="type">ViewAxis</span></a> upAxis</code></em>);</pre>
<p>
In constraint observation mode, the "north" direction is a singular
one. Define this direction with this routine.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>view</code></em> :</span></p></td>
<td>a <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> object.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>upAxis</code></em> :</span></p></td>
<td>a direction.
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 3.6</p>
</div>
<hr>
<div class="refsect2" title="VisuOpenGLViewNew ()">
<a name="VisuOpenGLViewNew"></a><h3>VisuOpenGLViewNew ()</h3>
<pre class="programlisting"><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="returnvalue">VisuOpenGLView</span></a>* VisuOpenGLViewNew (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Create a new <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> object with default values.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the newly created object (to be free with <a class="link" href="v-sim-view.html#VisuOpenGLViewFree" title="VisuOpenGLViewFree ()"><code class="function">VisuOpenGLViewFree()</code></a>).. <acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>. </td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="VisuOpenGLViewFree ()">
<a name="VisuOpenGLViewFree"></a><h3>VisuOpenGLViewFree ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> VisuOpenGLViewFree (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>);</pre>
<p>
Free the given <em class="parameter"><code>view</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>view</code></em> :</span></p></td>
<td>a valid <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> object.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="VisuOpenGLViewCopy ()">
<a name="VisuOpenGLViewCopy"></a><h3>VisuOpenGLViewCopy ()</h3>
<pre class="programlisting"><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="returnvalue">VisuOpenGLView</span></a>* VisuOpenGLViewCopy (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>);</pre>
<p>
Copy operator (newly <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> created with <a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-malloc"><code class="function">g_malloc()</code></a> to be freed be <a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a>).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>view</code></em> :</span></p></td>
<td>a valid <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> object.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> a newly allocated <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> with same values than <em class="parameter"><code>view</code></em>.. <acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>. </td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="VisuOpenGLCameraGet_numberOfFacettes ()">
<a name="VisuOpenGLCameraGet-numberOfFacettes"></a><h3>VisuOpenGLCameraGet_numberOfFacettes ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> VisuOpenGLCameraGet_numberOfFacettes
(<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> winSize</code></em>,
<em class="parameter"><code><span class="type">float</span> dimension</code></em>);</pre>
<p>
This is a function to get the number of "facettes" advised
by the server (according to its policy on rendering)
to draw an object according to a given dimension.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>camera</code></em> :</span></p></td>
<td>a valid <a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> object ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>winSize</code></em> :</span></p></td>
<td>the size of the rendering area.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dimension</code></em> :</span></p></td>
<td>the size of the object which asks for its number of facettes.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the number of facettes the object should used.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="openGLProject ()">
<a name="openGLProject"></a><h3>openGLProject ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> openGLProject (<em class="parameter"><code><a class="link" href="v-sim-view.html#OpenGLWindow" title="OpenGLWindow"><span class="type">OpenGLWindow</span></a> *window</code></em>,
<em class="parameter"><code>const <a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>,
<em class="parameter"><code><span class="type">float</span> extens</code></em>);</pre>
<p>
This method is used to set the projection and the OpenGL viewport.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>window</code></em> :</span></p></td>
<td>definition of the screen.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>camera</code></em> :</span></p></td>
<td>position of the camera.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>extens</code></em> :</span></p></td>
<td>expansion of the object.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="openGLModelize ()">
<a name="openGLModelize"></a><h3>openGLModelize ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> openGLModelize (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> *camera</code></em>);</pre>
<p>
Set-up the orientation matrix, depending on the camera definition.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>camera</code></em> :</span></p></td>
<td>a <a class="link" href="v-sim-view.html#VisuOpenGLCamera" title="VisuOpenGLCamera"><span class="type">VisuOpenGLCamera</span></a> object.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="VisuOpenGLViewSet_precision ()">
<a name="VisuOpenGLViewSet-precision"></a><h3>VisuOpenGLViewSet_precision ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> VisuOpenGLViewSet_precision (<em class="parameter"><code><span class="type">float</span> value</code></em>);</pre>
<p>
This function change the value of the parameter precisionOfRendering. It
changes the number of facettes advised for every objects. It allows to
increase or decrease the number of polygons drawn and thus acts on the
speed of rendering.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>a positive value (100 is normal precision).
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> TRUE if the signals OpenGLFacetteChanged and
OpenGLAskForReDraw should be emitted.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="VisuOpenGLViewGet_precision ()">
<a name="VisuOpenGLViewGet-precision"></a><h3>VisuOpenGLViewGet_precision ()</h3>
<pre class="programlisting"><span class="returnvalue">float</span> VisuOpenGLViewGet_precision (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
This function retrieve the value of the parameter precisionOfRendering.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the actual precision.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="openGLViewRotate_box ()">
<a name="openGLViewRotate-box"></a><h3>openGLViewRotate_box ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> openGLViewRotate_box (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>,
<em class="parameter"><code><span class="type">float</span> dTheta</code></em>,
<em class="parameter"><code><span class="type">float</span> dPhi</code></em>,
<em class="parameter"><code><span class="type">float</span> angles[2]</code></em>);</pre>
<p>
This methods rotates the camera of the given <em class="parameter"><code>view</code></em> of (<em class="parameter"><code>dTheta</code></em>, <em class="parameter"><code>dPhi</code></em>) and
put new theta and phi angles in <em class="parameter"><code>angles</code></em>, first being theta and second phi.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>view</code></em> :</span></p></td>
<td>a valid <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> object ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dTheta</code></em> :</span></p></td>
<td>a float value ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dPhi</code></em> :</span></p></td>
<td>a float value ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>angles</code></em> :</span></p></td>
<td> a storing area two floats.. <acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>. <acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> fixed-size=2. </td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="openGLViewRotate_camera ()">
<a name="openGLViewRotate-camera"></a><h3>openGLViewRotate_camera ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> openGLViewRotate_camera (<em class="parameter"><code><a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> *view</code></em>,
<em class="parameter"><code><span class="type">float</span> dTheta</code></em>,
<em class="parameter"><code><span class="type">float</span> dPhi</code></em>,
<em class="parameter"><code><span class="type">float</span> angles[3]</code></em>);</pre>
<p>
This methods rotates the camera of the given <em class="parameter"><code>view</code></em> of (<em class="parameter"><code>dTheta</code></em>, <em class="parameter"><code>dPhi</code></em>).
<em class="parameter"><code>dTheta</code></em> is taken as displacement along camera x axis and dPhi along camera y axis.
Then, computations are done to obtain new theta, phi and omega values. They are
put in <em class="parameter"><code>angles</code></em>, first being theta, second phi and third omega.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>view</code></em> :</span></p></td>
<td>a valid <a class="link" href="v-sim-view.html#VisuOpenGLView" title="VisuOpenGLView"><span class="type">VisuOpenGLView</span></a> object ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dTheta</code></em> :</span></p></td>
<td>a float value ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dPhi</code></em> :</span></p></td>
<td>a float value ;
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>angles</code></em> :</span></p></td>
<td> a storing area three floats.. <acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>. <acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> fixed-size=3. </td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="VisuOpenGLViewInit ()">
<a name="VisuOpenGLViewInit"></a><h3>VisuOpenGLViewInit ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> VisuOpenGLViewInit (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
This method is used by V_Sim during initilization process and should
not be called.
</p>
</div>
</div>
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