public void draw2D()
{
	// switch to 2d drawing
	glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
	glClearDepth(1);
	glViewport(0,0,800,600);
	glMatrixMode(GL_MODELVIEW);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	glOrtho(0, 800, 600, 0, 1, -1);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();

	// draw your 2d stuff here

	// reset to 3d drawing mode
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(45.0f, 4/3.0f, 0.1f, 1000);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	glEnable(GL_DEPTH_TEST);
	glDepthFunc(GL_LEQUAL);
	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
}