WebGLApplication: when smoothing, do half as many Vector3 copy operations. The Vector3 instances are reused and therefore only half of the vertices need an update.
WebGLApplication: when smoothing, do half as many Vector3 copy operations.
The Vector3 instances are reused and therefore only half of the vertices
need an update.

fzadow/CATMAID,fzadow/CATMAID,fzadow/CATMAID,fzadow/CATMAID