Hi Ibrahim,
> Is there a class in VisAD which can be used to create spheres easily...
> something like, if I define the co-oridnates of the centre and the
> length of diamter, it should render a spherical volume. How else can you
> create spheres? To use octahedra seems to me to make rendering
> spheres more difficult then it should be.
No. You may be able to find a routine on the web for
approximating a sphere as a set of triangles. It is a
general geometry problem.
Good luck,
Bill
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Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706
hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738
http://www.ssec.wisc.edu/~billh/vis.html