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Re: [Update REQ 5576]: Geomview output incompatible with BMRT Renderman


  • To: software@geom
  • Subject: Re: [Update REQ 5576]: Geomview output incompatible with BMRT Renderman
  • From: "Stuart Levy" <slevy>
  • Date: Sat, 30 Sep 1995 17:27:11 -0500

> "Os" [0.0588235 0.0588235 0.0588235] 
> Just out of curiosity, I tried changing "Os" to "Opacity", as follows:
> Opacity [0.0588235 0.0588235 0.0588235] 
> and, to my surprise, the image rendered correctly with transparency and no
> complaints at all from "rendrib".

> Is this a Geomview bug?

Yes, it is a bug.  It's now fixed in the source copy, so it will be repaired
in the next release, but for the time being I guess you'll have to keep
using your workaround.

In case you're compiling geomview from source, the change was in
src/lib/mg/rib/mgribdraw.c:
===================================================================
RCS file: RCS/mgribdraw.c,v
retrieving revision 1.25
diff -u -r1.25 mgribdraw.c
--- 1.25        1993/11/06 03:03:42
+++ mgribdraw.c 1995/09/30 22:09:23
@@ -375,7 +375,7 @@
        mrti(mr_color, mr_parray, 3, &p->pcol, mr_NULL);
        /* then per-polygon transparency, if defined */
        if (flag & APF_TRANSP && !(matover & MTF_ALPHA)) {
-         mrti(mr_Os, mr_array, 3, 
+         mrti(mr_opacity, mr_array, 3, 
               p->pcol.a, p->pcol.a, p->pcol.a, mr_NULL);
        }
       }


 
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