Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!zaphod.mps.ohio-state.edu!swrinde!elroy.jpl.nasa.gov!ncar!midway!quads.uchicago.edu!azah
From: azah@quads.uchicago.edu (ahmed  zahid)
Newsgroups: comp.graphics.visualization
Subject: RS6000 graPHIGS question, graPHIGS user groups.
Message-ID: <1991May23.224750.25948@midway.uchicago.edu>
Date: 23 May 91 22:47:50 GMT
Sender: news@midway.uchicago.edu (NewsMistress)
Organization: University of Chicago
Lines: 33


1) I am trying to use GPPGD3 function to insert a structure element
   consisting of vertex and normal coordinates of a set of points
   on a surface of a sphere. I understand that there is a maximum
   size limitation of 64K bytes per structure element; I am able to
   successfully generate the sphere with upto 384 vertices (i.e. upto
   9216 bytes). Furthermore, an object is displayed for a set of 96
   vertices (i.e. a total length of 2304 bytes). In both cases I am
   also using the graPHIGS element inquiry function GPQED that returns
   the element number and data buffer size in bytes of the structure
   element. Now when I try to increase the resolution of the sphere
   by using a set of 1536 vertices (structure length of 36864 bytes),
   I do not get any object displayed although GPQED does return 
   appropriate parameters.

   Anybody with any comments ?

2) I am considering getting a graPHIGS users group started here in the
   Midwest; does anybody have any knowledge of similar users group any
   where else. Is there one here in the Midwest, or on the East/West
   coast?


__________________________________________________________________

Zahid Ahmed

Scientifc Visualization Lab,
Center for Clouds, Chemistry and Climate
University of Chicago.

(312)-702-1808
ahmed@cassatt.uchicago.edu