IMPORTANT

• Add global feature to fannet
• consistent the direction of mesh norm
• consistent the start vertex of path
• Sort and expand edgev_idx cost too much memory. Optimize it make use of more than half neg idx
• Augdata: randomly change norm direction

RECONSIDER

• Pre down sampling, leads to lost of too many edges. Need to add new edges.
• Refine lonely vertex treatment

#Install pip install requests plyfile