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<[email protected]> 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 <[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 > > > > -- > Visit my blog at http://oddco.ca/zeroth/zblog >
