Update to SketchyFFD Plugin

After applying a optimization routine from stefan...

It sped up the initial weighting of a big model from 75 seconds to 15 seconds.

FFD stands for Free Form Deformation. It works by creating a 3D grid of construction points around the geometry. Manipulating the control points manipulates the nearby geometry. Click the link for examples:

SketchyFFD is hosted on SCF