Yes, this is what I'm trying to do but how do I calculate cross-section
of the object at a given distance?
Thanks again
Tyler Laing wrote:
Hmm, I'm not 100% familiar with 3d programming, but wouldn't the best
way be to find the cross-section of the object at some distance from
the camera, which would be a 2d shape, and then you can center the
text on that shape?
On Tue, Jun 30, 2009 at 9:26 PM, Astan Chee <[email protected]
<mailto:[email protected]>> 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
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