About data preprocessing code

Hello! I would like to know what the purpose of each file in the data preprocessing code is?
```

# revise args, e.g., root_dir to save the dataset.
bash generate_hm3d_train.sh

# remember to set basedir and dataset_name
python convert_cubemaps_mp.py

# remember to set basedir, dataset_name and output_basedir
python convert.py
```
