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<h1>The stereoViewer example</h1>
<center>
<img src="../images/stereoViewer.jpg" width="330" height="228" alt="stereoViewer"/>
</center>
<p>
Simply press <code>S</code> to toggle stereo display (if supported).
</p>
<p>
This is a simple stereo application inspired from <a href="simpleViewer.html">simpleViewer</a>.
The constructor is called with a QFormat stereo option to enable stereo. Press <code>S</code>
to toggle stereo display.
</p>
<h2>stereoViewer.h</h2>
<pre>
#include <QGLViewer/qglviewer.h>
class Viewer : public QGLViewer {
protected:
virtual void draw();
virtual void init();
virtual QString helpString() const;
};
</pre>
<h2>stereoViewer.cpp</h2>
<pre>
#include "stereoViewer.h"
#include <math.h>
#include <qapplication.h>
#include <QSurfaceFormat>
using namespace std;
void Viewer::init() {
restoreStateFromFile();
QSurfaceFormat format;
format.setStereo(true);
setFormat(format);
// Activate the stereo display. Press 'S' to toggle.
setStereoDisplay(true);
help();
}
QString Viewer::helpString() const {
QString text("<h2>S t e r e o V i e w e r</h2>");
text += "You can display in stereo with no change to your application, "
"provided that your hardware supports stereo display.<br><br>";
text += "If you get a <b>Stereo not supported on this display</b> error "
"message, check that ";
text += "your machine supports stereo (search for quad-buffer in "
"<i>glxinfo</i> and find stereo glasses !).<br><br>";
text += "You can then toggle the stereo display by pressing <b>S</b> in any "
"application.";
return text;
}
void Viewer::draw() {
// Draws a spiral
const float nbSteps = 200.0;
glBegin(GL_QUAD_STRIP);
for (float i = 0; i < nbSteps; ++i) {
float ratio = i / nbSteps;
float angle = 21.0 * ratio;
float c = cos(angle);
float s = sin(angle);
float r1 = 1.0 - 0.8 * ratio;
float r2 = 0.8 - 0.8 * ratio;
float alt = ratio - 0.5;
const float nor = 0.5;
const float up = sqrt(1.0 - nor * nor);
glColor3f(1.0 - ratio, 0.2f, ratio);
glNormal3f(nor * c, up, nor * s);
glVertex3f(r1 * c, alt, r1 * s);
glVertex3f(r2 * c, alt + 0.05f, r2 * s);
}
glEnd();
return;
}
</pre>
<h2>main.cpp</h2>
<pre>
#include "stereoViewer.h"
#include <qapplication.h>
int main(int argc, char **argv) {
QApplication application(argc, argv);
// Set the default OpenGL format with stereo capabilities.
QGLFormat format;
format.setStereo(true);
QGLFormat::setDefaultFormat(format);
Viewer viewer;
viewer.setWindowTitle("stereoViewer");
viewer.show();
return application.exec();
}
</pre>
<p>
Back to the <a href="index.html">examples main page</a>.
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