NURBS Surface Poly Editing (NSPE)
NSPE allows the user to hand edit the polygons on NURBS surfaces. This includes being able to drag the vertices anywhere along the NURBS surface as well as join the vertices together, break the vertices apart and color them. NSPE has a significant advantage over simply converting a NURBS surface to a polygon mesh for editing because NSPE lets the user be able continue to modify the NURBS surface for the hand edited polygon structure.
Because NSPE ensures that when a polygon's vertex is dragged it will always be on the NURBS surface, NSPE greatly helps the user to avoid unintentionally changing the shape of the model when optimizing for real time animation.
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