On Tue, Jun 30, 2009 at 9:26 PM, Astan Chee
<astan.chee@xxxxxxxxx> wrote:
Hi,
Im relatively new to opengl and I'm not familiat with its jargon but what I have is objects in a 3D world in various positions and a camera that can "move" around. What I'm trying to do is if the distance between object and camera is close enough, display some information on the screen on the object.
I know how to calculate distance and I know how to print/display text in opengl (I'm using glOrtho and glRasterPos2i to map out the characters one at a time).
Anyway, what I'm having problems with is how do I calculate where to display these information on the screen so that it overlaps the object (assuming I know the distance and the angle of the camera and the object relative to the camera). Does this make sense? I've attached an image that I photoshopped to look like what I'm trying to do.
Thanks for any help
Astan