drawing ellipsoid

system · November 9, 2003, 12:48pm

I am having trouble drawing an ellipsoid. I can get a sphere. Does any one have any hints on an easy way to put an ellipsoid in my project?

cg-hci_novice · November 10, 2003, 5:37am

line loop is the easiest I have seen so far - there is a formula (algorithm) for a circle in the red book - I believe there is a copy of it online.

Good luck.

Coconut · November 10, 2003, 5:37am

glScalef

system · November 10, 2003, 6:43am

How are you getting the sphere? Canned routine, or plotting the surface vertices yourself?

If you’re doing it yourself (say, by plotting x and y, where z varies by pi to 2*pi), then simply scale your x, y and z by a dividend to get an ellipsoid, no?

See Paul Bourke’s article for more details.

If you’re still stuck, squeal a reply here and I’ll drag out some OpenGL code.