Feature based unrolling with Ivy's orange_peel

Hi Everyone. Just wanted to show some results of the new segmentation and unroll possibilities in IVY. The new OrangePeel edge selector can use various mesh features to start a peel like segmentation. This produces nicely unrollable strips and keeps the piece count to a minimum. Here a 768 face mesh is unrolled in 27 pieces. Besides the low pieces number the strip morphology allows for easy fabrication of the object in the next stage.