Dear all,

 I was frustrated last night, because I failed to integrate libQGLViewer into OpenFlipper. It is just a very simple example.

 Any ideas? Or, If I want to show up a new window with glutCreateWindow("demo");, where I can draw primitives using OpenGL. How can I do that?

Thanks.

//**************** caller

SimpleViewer simplerviewerHelpme;

/*#if QT_VERSION < 0x040000

// Set the viewer as the application main widget.

application.setMainWidget(&simplerviewer);

#else

simplerviewer.setWindowTitle("simpleViewer");

#endif*/

// Make the viewer window visible on screen.

//simplerviewerHelpme.

//***********************

#ifndef CS554PROJ2PLUGINSIMPLEVIWER_HH

#define CS554PROJ2PLUGINSIMPLEVIWER_HH

#include <QGLViewer/qglviewer.h>

class SimpleViewer : public QGLViewer

{

protected :

  virtual void draw();

  virtual void init();

  virtual QString helpString() const;

};

#endif

//*********************

#include "simpleViewer.h"

using namespace std;

// Draws a spiral

void SimpleViewer::draw()

{

  const float nbSteps = 200.0;

  glBegin(GL_QUAD_STRIP);

  for (int i=0; i<nbSteps; ++i)

    {

      const float ratio = i/nbSteps;

      const float angle = 21.0*ratio;

      const float c = cos(angle);

      const float s = sin(angle);

      const float r1 = 1.0 - 0.8f*ratio;

      const float r2 = 0.8f - 0.8f*ratio;

      const float alt = ratio - 0.5f;

      const float nor = 0.5f;

      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();

}

void SimpleViewer::init()

{

  // Restore previous viewer state.

  restoreStateFromFile();

  

  // Opens help window

  help();

}

QString SimpleViewer::helpString() const

{

  QString text("<h2>S i m p l e V i e w e r</h2>");

  text += "Use the mouse to move the camera around the object. ";

  text += "You can respectively revolve around, zoom and translate with the three mouse buttons. ";

  text += "Left and middle buttons pressed together rotate around the camera view direction axis<br><br>";

  text += "Pressing <b>Alt</b> and one of the function keys (<b>F1</b>..<b>F12</b>) defines a camera keyFrame. ";

  text += "Simply press the function key again to restore it. Several keyFrames define a ";

  text += "camera path. Paths are saved when you quit the application and restored at next start.<br><br>";

  text += "Press <b>F</b> to display the frame rate, <b>A</b> for the world axis, ";

  text += "<b>Alt+Return</b> for full screen mode and <b>Control+S</b> to save a snapshot. ";

  text += "See the <b>Keyboard</b> tab in this window for a complete shortcut list.<br><br>";

  text += "Double clicks automates single click actions: A left button double click aligns the closer axis with the camera (if close enough). ";

  text += "A middle button double click fits the zoom of the camera and the right button re-centers the scene.<br><br>";

  text += "A left button double click while holding right button pressed defines the camera <i>Revolve Around Point</i>. ";

  text += "See the <b>Mouse</b> tab and the documentation web pages for details.<br><br>";

  text += "Press <b>Escape</b> to exit the viewer.";

  return text;

}

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Dipl.Inform. Jan Möbius
Department of Computer Science VIII
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