[gl2ps] GL2PS_OCCLUSION_CULL ignores GL2PS_BLEND

[Travis Cobbs]

2008/5/8 Shahzad Muzaffar <Shahzad.Muzaffar at cern.ch>:

>  Hello,
>   Please try to apply the attached patch ("patch -p0 <
> gl2ps.1.32.culling.patch" in gl2ps version 1.32 directory). Basically it
> just adds the following line
>
> if (prim->verts[0].rgba[3]<1.0F) return;
>
> at line number 1766 of gl2ps.c (version 1.32). i.e. function
> gl2psAddPlanesInBspTreeImage () will look like
>
>   if((*tree == NULL) && (prim->numverts > 2)){
>     if (prim->verts[0].rgba[3]<1.0F) return;
>     head = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d));
>     for(i = 0; i < prim->numverts-1; i++){
>
> This will avoid adding the transparant polygons in to the BSP tree map used
> for culling. So polygon hidden under these will not be culled. Please
> recompile and test again. Cheers,
> --Shahzad
>

Thanks.  That did indeed fix the problem.

--Travis
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