Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss
Evaluating points on a NURBS surface
6 views
Skip to first unread message
Jim Mower
Oct 14, 2009, 10:13:35 AM10/14/09
to
I am using NURBS surfaces to create smoothed renderings of landscapes.
The typical size of the problem ranges up to about 500 X 500 control
points. The rendering is working well but I now need to draw arbitrary
polylines over the surfaces between evaluated points at u,v on the
surface. I can do this on small sample data sets with Bezier curves in
OpenGL using the glMap3f() evaluator and then doing the evaluation
with glEvalCoord2f(). Is there any way to do the same thing using the
gluNurbsSurface() function? Any insights or pointers to a better way
of doing things would be much appreciated!
Jim
The typical size of the problem ranges up to about 500 X 500 control
points. The rendering is working well but I now need to draw arbitrary
polylines over the surfaces between evaluated points at u,v on the
surface. I can do this on small sample data sets with Bezier curves in
OpenGL using the glMap3f() evaluator and then doing the evaluation
with glEvalCoord2f(). Is there any way to do the same thing using the
gluNurbsSurface() function? Any insights or pointers to a better way
of doing things would be much appreciated!
Jim
0 new messages