Re: pfColortable help needed
John Rohlf (jrohlf++at++tubes)
Fri, 30 Jun 95 15:22:28 PDT
>
>
> I am a little stuck (again) on how to make appropriate use of pfColortable.
> I have created a simple database using MultiGen, which consists of just 9
> cubes, in a 3 by 3 grid. Each cube is of a different unique primary color
> (full red, full green, full blue, cyan, magenta, etc.).
>
> I have minimally hacked main.c of perfly following Example #2 in the
> pfColortable man page, as follows:
> - Just before the application main loop, I call my routine 'SetupLUT()'
> - in that routine, I do the following:
> pfEnable(PFEN_COLORTABLE);
> ctab = (pfColortable *)pfNewCtab(ctabsize, pfGetSharedArena());
> (then a bunch of calls to pfCtabColor for all indices of the table)
> pfApplyCtab(ctab);
> pfOverride(PFSTATE_COLORTABLE | PFSTATE_ENCOLORTABLE, PF_ON);
>
> What appears to me to be happening is that all the pretty colors :-) of
> my colored cubes map to index 0 of the color table, so that it does not
> actually matter what I set any other index to (or for that matter how long
> my colormap is - ie the value of ctabsize above).
>
> Where am I going wrong? I would really appreciate some help, since I have
> been beating my head against the wall for a while, and I can't find any
> hints in the docs.
>
> Thanks very much!
> Carlo.
You need to specify pfGeoSet color indices other than 0.
The pfColortable simple replaces the pfGeoSet color attribute array
so if your pfGeoSet color index is 0, it will index the first color
in the pfColortable array.
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on Mon Aug 10 1998 - 17:51:37 PDT