python convert.py --data_folder ../data/cad_json --output_folder ../data/cad_obj

运行出来的cad_obj文件夹都是空的？？？？

Not sure exactly what the issue is, but I suspect something went wrong in parse_json block, you can uncomment try..except.. to get more info.

I met the same problem. After running convert.py, I get empty folders. I am not sure but I went through the code and found the last few lines are for-loops without operation. I guess maybe the problem is related to some missing lines in this part?

Thank you for reporting this issue. I will look into this problem and fix it asap.