InternalRetrieves parameters for a drawArrays() call to render a specific mesh within a specific batch. This supports surface-picking, where we only draw the specific mesh being surface-picked.
Retrieves a SceneMesh from a specific batch at the given index. This supports picking, where we need to map from each mesh's fragments, containing the RGBA-encoded batch and mesh indices, back to the SceneMesh instance.
Interface that provides the data textures that implement the GPU-side memory. This interface is used within
DrawTechniqueinstances to access the GPU memory resources.