bones_dfm or bones_rst when using gauss_mlp_skinning?

[facebookresearch]

bones_dfm or bones_rst when using gauss_mlp_skinning?

[gengshan-y]

Hi, here's some relations of transformations that may help clarify things.

Backward:

X(view space at t) -> root pose inverse -> X(root space at t) -> backward LBS ->  X(root space at rest pose)

Forward:

 X(root space at rest pose) -> forward LBS -> X(root space at t') -> root pose -> X(view space at t') 

We calculate backward skinning weights with time t pose, and forward skinning weights with rest pose, and both are in the root space. In that line of code, xyz_coarse_sampled are points in the root space at time t. Let me know if there are further questions.

[Lxiangyue]

Many thanks for your clear and rapid reply!

Ah, I got it! So at the notation (# backward skinning), the 'xyz_coarse_sampled' into the lbs() is X(root space at t), and the returned 'xyz_coarse_sampled' is X(root space at rest pose). That's clear now.

banmo/nnutils/rendering.py

Line 293 in 177a390

# backward skinning