I’m so stoked about the Cg toolkit. Spider3D uses weights now and it sounds like vertex programs can do that. My software method is naturally slow…plus deforming the mesh also means that I have to recreate the tangents and binormals at the deformed vertices.
Since when has weights even been included as a vertex element? Is that an extension thing?
The weight register (ATTR1) has always been here since GL_NV_vertex_program was introduced.
The vertex weight is the Vertex Attribute 1. So if in a Cg program you have this:
struct vtxData : application2vertex
Then your bind would be (of course this would be specified before that struct i declared):
#pragma bind vtxData.weight = ATTR1
Or you could just do something like this instead of the pragma bind thing:
cgGLBindVarying3fv(ProgramIter, WeightBind, weight);
Also, you can recompute the binormal and tangent in the vertex program (or Cg now if you like). I have seen an example of this being done somewhere, I forget where though.
Awesome! I can’t wait to jump into this stuff!