Path: utzoo!utgpu!news-server.csri.toronto.edu!eecg.toronto.edu!drb
Newsgroups: comp.sys.sgi
From: drb@eecg.toronto.edu (David R. Blythe)
Subject: mapcolor
Message-ID: <1991Jan19.024229.4007@jarvis.csri.toronto.edu>
Organization: EECG, University of Toronto
Date: 19 Jan 91 07:42:30 GMT
Lines: 12

I am working on a interactive color map editor which likes to update the entire
subset of the color map being edited very rapidly. (e.g. when the frequency or
phase of a sinusoid is modified).  I am finding mapcolor() to be prohibitively
slow when updating 2000 or 3000 color table entries one at a time (it is
acceptable when doing only a few hundred entries).  Rather than trying to find
some way to update the whole colormap less frequently, I was hoping to find a
faster way to update large portions of the map (i.e. a gl routine to update a
contiguous subrange of the color table - even X has that :-).  Is there any
undocumented gl_xxx() routine that already does that, or perhaps someone at SGI
could be convinced to add such a routine in a future release?

	drb@clsc.utoronto.ca