displaying transparent clouds..

[K.R.Subramanian]

I would like to be able to display a density volume (single component
scalars) with varying opacity.
Rather than doing ray casting - which is quite slow - is there a a
cheaper way to do this
(on an SGI without 3D texture mapping capability)?  For instance, we
have a spherical density field
whose opacity is maximum at its center and decreases with radius. We
would like to visualize
this as a transparent field. We tried building multiple iso-surfaces,
but the concentric rings look
very much like 2D (with almost no shading). Teh application is to show
an object within this field
and compute an integral of its intersection with teh field.

    -- krs

--
K.R.Subramanian                           Phone: (704) 547-4872
Department of Computer Science            FAX:   (704) 547-3516
UNC Charlotte, 228A Kennedy
9201 Univ. City Blvd.                     Email: krs at cs.uncc.edu
Charlotte, NC 28223-0001                  WWW: http://www.cs.uncc.edu/~krs


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtkusers/attachments/20000413/fd9d7e2f/attachment.html>