Volume rendering on a 4D35

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2 total messages Started by Gus Williams Thu, 27 Aug 1992 21:00

#106

Author: Gus Williams
Date: Thu, 27 Aug 1992 21:00

19 lines
1087 bytes

I can't seem to get volume rendering to work correctly.  I've
played with the splat sizes, adjusted the colormaps, prayed
to the computer gods, but nothing works.  I've decided that
I just don't have the hardware for it (low computer self image).

The problem is I get solid splats.  I can't seem to make them
semi-opaque (sp?).


I have a 4D35/TG and hinv gives me 

Graphics board: GR1.2 Bit-plane, Z-buffer, Turbo options installed

Do I need something else? or am I just an underachiever?


Thanks for any help, or any recomendation of a good therapist that
specilizes in computer caused mental disorders.

Re: Volume rendering on a 4D35

#107

Author: Roy Hashimoto
Date: Fri, 28 Aug 1992 04:45

13 lines
1080 bytes

In article <1992Aug27.210047.29058@news.acns.nwu.edu> williams@casbah.acns.nwu.edu (Gus Williams) writes:
>I can't seem to get volume rendering to work correctly.  I've
>played with the splat sizes, adjusted the colormaps, prayed
>to the computer gods, but nothing works.  I've decided that
>I just don't have the hardware for it (low computer self image).

You're right.  Rendering the transparent splats requires blending
capability.  For linear or gaussian splats, you also need hardware
that supports interpolating alpha across polygons.  I believe your
PI is not capable of either of these functions.

Roy Hashimoto
hashimoto@sgi.com

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