266         if(invert) direction = direction * -1;
 
  275         if(invert) direction = direction * -1;
 
  285         if(invert) direction = direction * -1;
 
  334         glDisable(GL_LIGHTING);
 
  336         glColor3f(1.0, 0.0, 0.0);
 
  337         glVertex3f(-1000000, 0.0, 0.0);
 
  339         glVertex3f(+1000000, 0.0, 0.0);
 
  341         glColor3f(0.0, 1.0, 0.0);
 
  342         glVertex3f(0.0, -1000000, 0.0);
 
  344         glVertex3f(0.0, +1000000, 0.0);
 
  346         glColor3f(0.0, 0.0, 1.0);
 
  347         glVertex3f(0.0, 0.0, -100000);
 
  349         glVertex3f(0.0, 0.0, +100000);
 
  352         glEnable(GL_LIGHTING);