pfDrawBin in Performer2.1

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Wade Olsen (wade++at++surf.shoreline-studios.com)
Tue, 20 Jan 1998 16:51:34 -0800

I have a 2.2 program that calls:

  pfDrawBin(-1);
  pfDrawBin(PFSORT_OPAQUE_BIN);
  if (!depth_test)
    glDisable(GL_DEPTH_TEST);
  pfDrawBin(PFSORT_TRANSP_BIN);
  if (!depth_test)
    glEnable(GL_DEPTH_TEST);

In than channel draw callback. It works fine in 2.2 but when compiled
with 2.1 I get a SEGV coredump when trying to draw the OPAQUE bin. After
a bit of surfing on SGI's web page I found mention of a Performer 2.0.*
bug drawing empty bins describing this situation but it was hinted that
this had been fixed in 2.1. The workaround for the mentioned 2.0.* bug
was to add an empty geoset to the bin. I tried this with:

  pfGeoSet * gset = new pfGeoSet;
  pfGeoState * gstate = new pfGeoState;
  gset->setGState(gstate);
  gset->setDrawBin(PFSORT_OPAQUE_BIN);
  pfGeode * geode = new pfGeode;
  geode->addGSet(gset);
  group->addChild(geode);

Where "group" is already a child of the channel's scene. Unfortunately,
this didn't help. Anyone run into this?

Wade

-- 
-----------------------------
Wade Olsen, Shoreline Studios
e-mail:	wade++at++shoreline-studios.com
phone:	650-969-7896
fax:	650-969-7864
www:	http://www.shoreline-studios.com
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