Re: Using PFDECAL_BASE_STENCIL?
John Rohlf (jrohlf++at++tubes)
Tue, 25 Jul 95 9:43:16 PDT
>
> Hi all, it's me again,
>
> By default, pfLayer nodes (as loaded from a multigen model, in our case) use
> PFDECAL_BASE_DISPLACE, which uses the GL displacepolygon() function.
>
> How do I make them all use PFDECAL_BASE_STENCIL instead? The obvious thing
> to try would be:
> pfDecal(PFDECAL_BASE_STENCIL);
> pfOverride(PFSTATE_DECAL, PF_ON);
>
> But this stops Performer from ever calling pfDecal again, which means it
> won't call pfDecal(PFDECAL_LAYER) for the decal layers in each pfLayer node,
> so you end up with just lots of flickering polygons (because everything in
> the scene graph is treated as base geometry!).
>
> Do I have to traverse the whole scene graph and individually change the type
> of decaling used for each pfLayer node I come across? (Everything I want to
> do these days seems to require traversing the whole scene graph :-(. ).
>
Traversing the whole scene graph shouldn't be so painful.
The traversal code itself would be very short and if you use
pfuTraverser the required code gets even smaller. Just register a
callback with the pfuTraverser and set the layer mode:
pfLayerMode(layer, PFDECAL_BASE_STENCIL);
If you are using the shipped flt loader then you can explicitly
specify STENCIL-type layers with LoadFltMode().
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on Mon Aug 10 1998 - 17:51:42 PDT