Downsample in your_own_data.py

[ricshaw]

I think there is a mistake when using downsample in the your_own_data.py data loader. Shouldn't the principle point cx, cy should also be divided by self.downsample? https://github.com/apchenstu/TensoRF/blob/17deeedae5ab4106b30a3295709ec3a8a654c7b1/dataLoader/your_own_data.py#L48