<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>libQGLViewer stereoViewer example</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <link href="../qglviewer.css" rel="stylesheet" type="text/css" /> <link rel="shortcut icon" href="../images/qglviewer.ico" type="image/x-icon" /> <link rel="icon" href="../images/qglviewer.icon.png" type="image/png" /> </head> <body> <table class="banner"> <tr> <td align="center"><a href="../index.html"><b>Home</b></a></td> <td align="center"><a href="../refManual/hierarchy.html"><b>Documentation</b></a></td> <td align="center"><a href="../download.html"><b>Download</b></a></td> <td align="center" class="qindexHL"><a href="index.html"><b>Screenshots</b></a></td> <td align="center"><a href="../developer.html"><b>Developer</b></a></td> </tr> </table> <h1>The stereoViewer example</h1> <center> <img src="../images/stereoViewer.jpg" width="300" height="200" alt="stereoViewer"/> </center> <p> Simply press S to toggle stereo display (architecture dependent). </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 'S' to toggle stereo display. </p> <h2>stereoViewer.h</h2> <pre> <span class="dir">#include <QGLViewer/qglviewer.h> </span> <span class="key">class </span>Viewer : <span class="key">public </span>QGLViewer { <span class="key">public </span>: Viewer(<span class="typ">const </span>QGLFormat& format); <span class="key">protected </span>: <span class="key">virtual </span><span class="typ">void </span>draw(); <span class="key">virtual </span>QString helpString() <span class="typ">const</span>; };</pre> <h2>stereoViewer.cpp</h2> <pre> <span class="dir">#include </span><span class="dstr">"stereoViewer.h"</span><span class="dir"> </span><span class="dir">#include <qapplication.h> </span><span class="dir">#include <math.h> </span> <span class="key">using namespace </span>std; <span class="com">// Constructor must call the base class constructor. </span><span class="com">// See the QT man page for details on QGLFormat. </span>Viewer::Viewer(<span class="typ">const </span>QGLFormat& format) : QGLViewer(format) { restoreFromFile(); <span class="com">// Activate the stereo display. Press 's' to toggle. </span> setStereoDisplay(<span class="key">true</span>); help(); } QString Viewer::helpString() <span class="typ">const </span>{ QString text(<span class="str">"<h2>S t e r e o V i e w e r</h2>"</span>); text += <span class="str">"You can display in stereo with no change to your application.<br>"</span>; text += <span class="str">"If you get a <b>Stereo not supported on this display</b> error message, check that "</span>; text += <span class="str">"your machine supports stereo (search for quad-buffer in <i>glxinfo</i> and find stereo glasses!). "</span>; text += <span class="str">"Send an e-mail if you were able to run other stereo applications and not this one.<br>"</span>; text += <span class="str">"Press <b>S</b> to toggle the stereo display."</span>; <span class="key">return </span>text; } <span class="typ">void </span>Viewer::draw() { <span class="com">// Draws a spiral </span> <span class="typ">const float </span>nbSteps = <span class="num">500.0</span>; glBegin(GL_QUAD_STRIP); <span class="key">for </span>(<span class="typ">float </span>i=<span class="num">0</span>; i<nbSteps; ++i) { <span class="typ">float </span>ratio = i/nbSteps; <span class="typ">float </span>angle = <span class="num">21.0</span>*ratio; <span class="typ">float </span>c = cos(angle); <span class="typ">float </span>s = sin(angle); <span class="typ">float </span>r1 = <span class="num">1.0 </span>- <span class="num">0.8</span>*ratio; <span class="typ">float </span>r2 = <span class="num">0.8 </span>- <span class="num">0.8</span>*ratio; <span class="typ">float </span>alt = ratio <span class="num">- 0.5</span>; <span class="typ">const float </span>nor = .<span class="num">5</span>; <span class="typ">const float </span>up = sqrt(<span class="num">1.0</span>-nor*nor); glColor3f(<span class="num">1</span>-ratio, .<span class="num">2 </span>, ratio); glNormal3f(nor*c, up, nor*s); glVertex3f(r1*c, alt, r1*s); glVertex3f(r2*c, alt+<span class="num">0.05</span>, r2*s); } glEnd(); <span class="key">return</span>; }</pre> <h2>main.cpp</h2> <pre> <span class="dir">#include </span><span class="dstr">"stereoViewer.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 with a stereo OpenGl context. </span> QGLFormat format; format.setStereo( TRUE ); Viewer viewer(format); <span class="com">// Make the viewer window visible on screen. </span> 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> <p> <a href="index.html">Go back</a> to the examples main page </p> <p> <a href="http://validator.w3.org/check/referer"><img src="../images/xhtml.png" alt="Valid XHTML 1.0!" height="31" width="88" border="0"/></a> <a href="http://jigsaw.w3.org/css-validator/check/referer"><img src="../images/css.png" width="88" height="31" alt="Valid CSS!" border="0"/></a> <i>Last modified on Thursday, February 5, 2004.</i> </p> </body> </html>