What do the three test result files mean?

[ou-ais]

Hi, IsaacGuan
Thank you so much for sharing the application code of pointnet.
When I run your code, I have the following doubts.

1. What are the three .obj files in the 'test_result' directory represent for?
   As far as I understand, the *_pred.obj file is the prediction of part segmentation. However, when I tested on my own data set, I did not see any segmentation from that file(there are no blue points in the point cloud), but the accuracy and IoU of the test are 0.968 and 0.634.
2. Must the number of data used for 'data_testing.h' and 'data_training.h' be the same?
   When the files were written from a different number of data, the program will report an error.
   I would appreciate it if you answer my question.