Drawing context

The redraw function in your model is called from the animator framework.  The caller is CGLView::draw.  CGLView is a class derived from the FLTK class Fl_Gl_Window.  The draw function is:

void CGLView::draw()

{

if(!valid())

{

m_nWindowWidth=w();

m_nWindowHeight=h();

m_bSizeChange=true;

glMatrixMode( GL_PROJECTION );

glLoadIdentity();

gluPerspective( 30.0, (double)m_nWindowWidth/m_nWindowHeight, 1.0, 100.0 );

glViewport( 0, 0, m_nWindowWidth, m_nWindowHeight );

glEnable(GL_DEPTH_TEST);

glClearColor(0.0f, 0.0f, 0.0f, 0.0);

}

glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

// get drawMode and drawQuality from UI

int drawMode=m_pUI->getDrawMode();

if (m_pScene) m_pScene->redraw(drawMode);

}