Hi,
I am wondering if separating a ChunkMaterial into two parts might be possible:
The first containing a SimpleSHLChunk for several childs:
OSG::SimpleSHLChunkUnrecPtr shl = OSG::SimpleSHLChunk::create();
shl->setVertexProgram (_vp_program);
shl->setFragmentProgram(_fp_program);
// common parameters:
shl->addUniformVariable("texScale0",
OSG::Vec2f(1.0f/OSG::Real32(numTiles), 1.0f/OSG::Real32(numTiles)));
shl->addUniformVariable("texScale1", OSG::Vec2f(1.0f, 1.0f));
// uniform sampler2D
shl->addUniformVariable("tex_alpha", 0);
shl->addUniformVariable("tex_ground", 1);
shl->addUniformVariable("tex_detail1", 2);
shl->addUniformVariable("tex_height", 3);
shl->addUniformVariable("tex_gradient", 4);
and a second containing special variables (scalings, coords) for a specific
child node:
OSG::SimpleSHLVariableChunkUnrecPtr shlparam =
OSG::SimpleSHLVariableChunk::create();
shlparam->addUniformVariable("texOrigin0",
OSG::Vec2f(tx/OSG::Real32(numTiles),ty/OSG::Real32(numTiles)));
shlparam->addUniformVariable("tileCoord", OSG::Pnt2f(tx, ty));
shlparam->addUniformVariable("tileOrigin", OSG::Pnt2f(-skySize, -skySize));
shlparam->addUniformVariable("decimate", 10.0f);
Is this possible or intended with an ChunkOverrideGroup containing the first?
Does it have benefits to do so?
Thanks,
Christoph
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