shuimoo

when using PytochNerfactoField instead of TCNNNerfactoField, some problems came out. ``` File "/root/qnerf/nerfstudio/fields/nerfacto_field.py", line 347, in get_density encoded_xyz = self.position_encoding(positions) File "/root/anaconda3/envs/nerfstudio/lib/python3.8/site-packages/torch/nn/modules/module.py", line 1130, in _call_impl return forward_call(*input, **kwargs) File...