Documentation of raygen coords_grid is incorrect

[orperel]

generate_rays(), generate_pinhole_rays(), generate_ortho_rays() all take a coords_grid of type Tuple[torch.Tensor, torch.Tensor]. The documentation states this tuple is stacked into a single Tensor:

https://github.com/NVIDIAGameWorks/kaolin/blob/master/kaolin/render/camera/raygen.py#L122

[github-actions[bot]]

Stale issue, please reopen if still relevant