Re: Volume Rendering with cross-sections

• To: Ethan Ang <twang@xxxxxxxxxxxxxx>
• Subject: Re: Volume Rendering with cross-sections
• From: "From: Bill Hibbard <hibbard@xxxxxxxxxxxxxxxxx>" <billh@xxxxxxxxxxxxx>
• Date: Tue, 15 Feb 2000 12:43:20 -0600 (CST)

Hi Ethan,

> I understand that VisAD can do volume rendering and Test61 is quite a good
> example. I was wondering if it is possible to implement volume rendering
> with cross-sections so that I can view the 'insides' clearly (and not just a
> solid block if the outsides are not transparent).
> 
> I'm thinking along the line of brain scans, where you can see the brain
> layer by layer. (that would actually be just many 2D pictures). What if I
> want to be able to see the whole brain in 3D as a solid, but at the same
> time, there is a separate plane which I can control to view cross-sections.
> 
> Can this be done in VisAD?

Yes, with a little work.  There is an answer with a bit of
source code in an earlier answer at:

  http://www.unidata.ucar.edu/staff/russ/visad/msg00488.html

Basically, you call resample() on your volume FlatField using
an argument Set with domain dimension = 3 and manifold
dimension = 2, and then display the FlatField returned by
resample().

Cheers,
Bill
----------------------------------------------------------
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

• References:
  • Volume Rendering with cross-sections
    • From: Ethan Ang