GitLab

* fvdb integrate

* vdb in examples

* format

Correctly evaluate Eq (2) of

Improved Direct Voxel Grid Optimization for Radiance Fields Reconstruction
https://arxiv.org/pdf/2206.05085.pdf

Co-authored-by: Gu Lee <99sphere@gmai.com>

Support expected depth option for rendering

This reverts commit bc1a03d7.