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<h1>The x3dViewer example</h1>
<center>
<img src="../images/x3dViewer.jpg" width="300" height="200" alt="x3dViewer"/>
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<p>
The X3D Toolkit library is used to load and display a x3d scene.
</p>
<p>
You need to install the X3D library in order to compile this file.
See the <a="http://www-artis.imag.fr/Members/Yannick.Legoc">Yannick Le Goc web site</a>
(or <a="http://www-imagis.imag.fr/Membres/Yannick.Legoc/X3D/index.html">this page</a>).
</p>
<p>
Once this is done, edit <code>x3dViewer.pro</code>, set <code>LIBX3D_IS_INSTALLED</code> to
<code>yes</code> and set <code>INCLUDEPATH</code> and <code>LIBS</code> to the path where you
installed libX3D.
</p>
<p>
Press <b>L</b> (load) to load a new 3DS scene.
</p>
<h2>x3dViewer.h</h2>
<pre>
<span class="dir">#include <QGLViewer/qglviewer.h>
</span><span class="dir">#include <X3DTK/simplex3dglscene.h>
</span>
<span class="key">class </span>Viewer : <span class="key">public </span>QGLViewer
{
<span class="key">protected </span>:
<span class="key">virtual </span><span class="typ">void </span>init();
<span class="key">virtual </span><span class="typ">void </span>draw();
<span class="key">virtual </span><span class="typ">void </span>keyPressEvent(QKeyEvent *e);
<span class="key">virtual </span>QString helpString() <span class="typ">const</span>;
<span class="typ">void </span>loadFile();
<span class="key">private</span>:
X3DTK::SimpleX3DGLScene scene;
};</pre>
<h2>x3dViewer.cpp</h2>
<pre>
<span class="dir">#include </span><span class="dstr">"x3dViewer.h"</span><span class="dir">
</span><span class="dir">#include <qfiledialog.h>
</span>
<span class="key">using namespace </span>X3DTK;
<span class="key">using namespace </span>std;
<span class="typ">void </span>Viewer::init()
{
<span class="dir">#ifdef GL_RESCALE_NORMAL
</span> glEnable(GL_RESCALE_NORMAL);
<span class="dir">#endif
</span> loadFile();
help();
}
<span class="typ">void </span>Viewer::keyPressEvent(QKeyEvent *e)
{
<span class="key">switch </span>(e->key())
{
<span class="key">case </span>Qt::Key_L : loadFile(); <span class="key">break</span>;
<span class="key">default</span>: QGLViewer::keyPressEvent(e);
}
}
<span class="typ">void </span>Viewer::loadFile()
{
QString name = QFileDialog::getOpenFileName(<span class="str">""</span>, <span class="str">"X3D files (*.x3d *.X3D);;All files (*)"</span>, <span class="key">this</span>);
<span class="com">// In case of Cancel
</span> <span class="key">if </span>(name.isEmpty())
<span class="key">return</span>;
<span class="com">/// Release previous scene.
</span> scene.release();
<span class="com">/// Loads the scene, with no xml validation.
</span> scene.load(name, <span class="key">false</span>);
<span class="com">/// QGLViewer scene settings.
</span> setSceneBoundingBox(scene.getBBoxMin().f_data(), scene.getBBoxMax().f_data());
showEntireScene();
}
<span class="typ">void </span>Viewer::draw()
{
scene.draw();
}
QString Viewer::helpString() <span class="typ">const
</span>{
QString text(<span class="str">"<h2>x 3 d V i e w e r</h2>"</span>);
text += <span class="str">"This example uses the libX3D library to load an x3d object file.<br>"</span>;
text += <span class="str">"Press <b>L</b>(oad) to open an x3d file.<br><br>"</span>;
text += QGLViewer::helpString();
<span class="key">return </span>text;
}</pre>
<h2>main.cpp</h2>
<pre>
<span class="dir">#include </span><span class="dstr">"x3dViewer.h"</span><span class="dir">
</span><span class="dir">#include <qapplication.h>
</span>
<span class="typ">int </span>main(<span class="typ">int </span>argc, <span class="typ">char</span>** argv)
{
<span class="com">// Read command lines arguments.
</span> QApplication application(argc,argv);
<span class="com">// Instantiate the viewer, show it on screen.
</span> Viewer viewer;
viewer.show();
<span class="com">// Set the viewer as the application main widget.
</span> application.setMainWidget(&viewer);
<span class="com">// Run main loop.
</span> <span class="key">return </span>application.exec();
}</pre>
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<i>Last modified on Thursday, February 5, 2004.</i>
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