using pfColortable except for one type of node

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Sylvain Mayer (mayer++at++CAE.CA)
Wed, 07 Oct 1998 18:31:54 -0400

Hi,

I want to render my scene with a pfColortable. In the draw callback of
the channel, I'm doing the following:

  pfEnable(PFEN_COLORTABLE);
  ctab->apply();
  pfOverride(PFSTATE_COLORTABLE | PFSTATE_ENCOLORTABLE, PF_ON);

  pfDraw();

  pfDisable(PFEN_COLORTABLE);
  pfOverride(PFSTATE_COLORTABLE | PFSTATE_ENCOLORTABLE, PF_OFF);

That worked just fine but within the traversal, I need to render some
billboards without using the pfColortable. To do this, I'm using a
pre/post draw callback to the billboard just like the following but it
does not work. I'm currently rendering the billboard with the
colortable.

static int preDraw(pfTraverser *trav, void*)
{
  pfDisable(PFEN_COLORTABLE);
  pfOverride(PFSTATE_COLORTABLE | PFSTATE_ENCOLORTABLE, PF_OFF);
  return PFTRAV_CONT;
}

static int postDraw(pfTraverser* trav, void*)
{
  pfEnable(PFEN_COLORTABLE);
  pfOverride(PFSTATE_COLORTABLE | PFSTATE_ENCOLORTABLE, PF_ON);
  return PFTRAV_CONT;
}

Does any of you have another way of doing what I want? I'm wondering
why its not working.

thanks, Sylvain

--
Sylvain Mayer, 3D Graphics Developer
Graphics Simulation Technology
Display Eng. & Special Projects
CAE Electronics Ltd. (http://www.cae.ca)
mailto:mayer++at++cae.ca
Tel: (514) 341-6780    Ext: 3065
Fax: (514) 734-5618

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