title: CGFloat vs GLfloat
body: <p>I understand CGFloat should be used in Cocoa applications to make them 64-bit clean. But what about in a simple OpenGL game that uses Cocoa/Objective-C for everything but the rendering (to an NSOpenGLView)? CGFloat is a part of Core Graphics, so if I would it also be alright to use CGPoint, CGRect etc.? or should I just write rects and vectors and that kind of stuff myself?</p>
  
  <p>Basically is it fine to mix OpenGL with CoreGraphics types?</p>