Also, I'm trying not to use glu or glut functions. Forrest Voight wrote: Why does the cross-section matter? Just display it at the object's center... On Wed, Jul 1, 2009 at 1:01 AM, Astan Chee<astan.chee@xxxxxxxxx> wrote: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 <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-- Visit my blog at http://oddco.ca/zeroth/zblog |