Re: [Closed REQ 5679]:

[daemon]

> 
> Date: Wed, 13 Dec 1995 18:18:56 -0800
> From: tkim at enws102.CAGD.EAS.ASU.EDU (Tae-Wan Kim)
> Message-Id: <199512140218.SAA17476 at bachus.cagd.eas.asu.edu>
> 
> Dear Sir,
> 
> I am currently Geomview on SGI machine.
> I am very enjoying Geomview and I like it very much.
> 
> I have a question.  I run a Marching Cube algorithm
> to visualize MRI data.  The number of triangles of output
> is almost 800,000.  I saved the list of triangles as
> a geomview file format ("CNOFF" format).  The file size is
> almost 175 Mega bytes for this file.  And then I run Geomview
> and read the file.  However, the file take too much space.
> 
> Could you please tell me how to save space?
> 
> My file form is as follows:
> 
> { = LIST
> { = CNOFF
> # Iso-phote_of_shoe
> 2361342 787114 2361342
> 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.000 0.000 0.000
> 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.000 0.000 0.000
> 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.000 0.000 0.000
> 0.097 0.431 0.339 -0.978 -0.198 0.058 0.000 1.000 0.000 0.000
> 0.098 0.431 0.338 -0.983 -0.183 0.020 0.000 1.000 0.000 0.000
> 0.098 0.429 0.339 -0.989 -0.128 0.070 0.000 1.000 0.000 0.000
> 0.098 0.429 0.339 -0.989 -0.128 0.070 0.000 1.000 0.000 0.000
> 0.098 0.431 0.340 -0.973 -0.217 0.078 0.000 1.000 0.000 0.000
> 0.097 0.431 0.339 -0.978 -0.198 0.058 0.000 1.000 0.000 0.000
> 0.098 0.431 0.374 -0.989 0.140 0.045 0.000 1.000 0.000 0.000
> 
> 

Hello,

  Geomview was only designed for viewing polygonal data. It is not
very good at being a volume renderer. Instead of using Geomview, you
might try using "Bob", the free volume visualization package from the
Army High Performance Research center. It's located at the following
URL:

http://www.arc.umn.edu/html/gvl-software/bob.html


This might be just what you're looking for. It handles very large 3D
datasets, but for interactive use, you'll really need an SGI with lots
of graphics hardware like VGX, or Reality Engine/2 graphics.

Good luck!

Daeron