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ashawkey / torch-ngp

A pytorch CUDA extension implementation of instant-ngp (sdf and nerf), with a GUI.
MIT License
2.11k stars 275 forks source link

custom autograd backward #171

Open GGGuni opened 1 year ago

GGGuni commented 1 year ago

Hi, I'm modifying torch-ngp code to create a model that updates the pose. I created a new custom autograd function, with forward and backward. However, I wonder why the backward I defined is not executed even though the forward is called. In a similar context, I wonder why the backward of the _sh_encoder class is not executed, even though the forward of the _sh_encoder was executed. This is my first time to implement custom autograd function, so it would be very helpful if you could explain it please... :) Thanks a lot :)

hdzmtsssw commented 1 year ago

Hi @GGGuni , I am interested in your work. Do you have any new progress？