The link to the datasource 3 is provided in the download.sh file. Download the zip file to some location (let’s call it /whatever/data/path/is) on your machine and unzip it. Now, from the command line go to utils folder in this project and run
python train_classification.py --dataset /whatever/data/path/is/shapenetcore_partanno_segmentation_benchmark_v0 --nepoch=1000 --dataset_type modelnet40
I can tell you that as soon as you run the above command you will run into issues with some file missing. You may have to labor through this code manually to get this running. Be patient and try to read the errors carefully to understand how you can address them one at a time. Good luck.