Viewer.cpp

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/// \file Viewer.cpp
#include "Viewer.h"
 
using namespace std;
 
// Draws a tetrahedron with 4 colors.
void Viewer::draw()
{
  float colorBronzeDiff[4] = { 0.8, 0.6, 0.0, 1.0 };
  float colorRedDiff   [4] = { 1.0, 0.0, 0.0, 1.0 };
  float colorGreenDiff [4] = { 0.0, 1.0, 0.0, 1.0 };
  float colorBlueDiff  [4] = { 0.0, 0.0, 1.0, 1.0 };
 
  // Draws triangles given by 3 vertices.
  glBegin(GL_TRIANGLES);
  glColor4fv(colorBronzeDiff);
  glVertex3f( 0.0, 0.0, 0.0 );
  glVertex3f( 1.0, 0.0, 0.0 );
  glVertex3f( 0.0, 1.0, 0.0 );
  glColor4fv(colorRedDiff);
  glVertex3f( 1.0, 0.0, 0.0 );
  glVertex3f( 0.0, 1.0, 0.0 );
  glVertex3f( 0.0, 0.0, 1.0 );
  glColor4fv(colorGreenDiff);
  glVertex3f( 0.0, 0.0, 0.0 );
  glVertex3f( 0.0, 1.0, 0.0 );
  glVertex3f( 0.0, 0.0, 1.0 );
  glColor4fv(colorBlueDiff);
  glVertex3f( 0.0, 0.0, 0.0 );
  glVertex3f( 1.0, 0.0, 0.0 );
  glVertex3f( 0.0, 0.0, 1.0 );
  glEnd();
}
 
 
void Viewer::init()
{
  // Restore previous viewer state.
  restoreStateFromFile();
 
  // Opens help window
  help();
}
 
QString Viewer::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;
}