Bone reinitialization

[subin6]

Bone reinitialization

[gengshan-y]

Hi, the first line you referred to

banmo/nnutils/geom_utils.py

Line 698 in c449803

bones,_ = correct_bones(model, bones, inverse=True)

transforms control points in the rest configuration (corresponding to \omega* in the paper, aligned with the rest shape) to a zero configuration.

First of all, this separate modeling of zero configuration is not an integral part of the method, the method worked without it.

The motivation of adding a zero configuration was to ensure all pose codes (rest code \omega^* and time code \omega^t) can be mapped to transforms J with the same definition:

J(\omega) = MLP_b(\omega) # J is the zero-to-any transformation

Instead defining J as the rest-to-any transformation and enforcing J(\omega^*)=Identity, we define J as zero-to-any transformation, where any can include both t and rest.

Hope this makes sense.