without normals experiment

[Sanghuk Lee]

Hello!
I'm very interested in your research.
I want to run your classification code in other dataset, which is only providing location.
And I wonder that how you order points without normals,
there is only code for with normals.

I'm look forward to your reply and thank you very much.

[longkun]

@tkdguraa Use PCA algorithm can acquire rough normals of points