• Ken Martin's avatar
    Add support for picking indirection arrays · a74d8a2b
    Ken Martin authored
    At the same time this patch completely changes how cell data is
    handled. In the past we would duplicate any shared vertices so
    that we could apply the cell data uniquely to each vertex.
    That causes a huge increase in size for the data as a typical
    mesh has each vertex shared by 6 triangles.
    The new approach we create a texture buffer where we store the
    cell data. Then in the fragment shader we use the gl_PrimitiveID
    to index into the texture buffer to lookup the relevent cell data.
    With this change gl_PrimitiveID support is now required not just
    for picking but for everything.
vtkOpenGLActor.h 1.66 KB