gistfile1.m

-(void)setupView:(GLView*)view
{
	
	
	const GLfloat zNear = -0.01, zFar = 1000.0, fieldOfView = 45.0; 
	GLfloat size; 
	glMatrixMode(GL_PROJECTION); 
	glEnable(GL_DEPTH_TEST);
        glDepthMask(GL_TRUE);
	size = zNear * tanf(DEGREES_TO_RADIANS(fieldOfView) / 2.0); 
	CGRect rect = view.bounds; 
	glFrustumf(-size, size, -size / (rect.size.width / rect.size.height), size / 
			   (rect.size.width / rect.size.height), zNear, zFar); 
	glViewport(0, 0, rect.size.width, rect.size.height);  

}