Offset in computeCenterOfMass

[Li Xiaosheng]

I guess the center of mass is computed by CenterOfMass = sum(tetrahedron COM times tetrahedron volume) / overall volume

In such case, the code should be cmd += (p1+p2+p3) * (cvol/4.0) instead of cmd += (p1+p2+p3) * (cvol/3.0)

The current implementation thus causes some offsets when this function is called in volume-preserving mesh smoothing.

[thunil]

Hi Li Xiaosheng, thanks for pointing this out, and sorry for the slow reply! I'll fix that right away...

[thunil]

Fixed