Patch enables all 8 combinations of Nurbs modes: Cyclic, Bezier and Endpoint.
Also removes restriction on Bezier Nurbs order. In order 2 doesn’t look well, but so does in other modes
Most significant changes still are mode combinations and new ones bring new meaning. Bellow is a scheme showing NURBS with same control points in a modes. On sides knot structures are visualized.
Diagonal lines show by what knots particular control point is affected. Blue and cyan arrows show to which cp’s curve is clamped and which knots create that clamp. Purple line demonstrates where cycle in knot begins.
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- First two cases a), b) g) has always existed, do not bring any changes nor require explanation.
- c) normal Bezier. It kind of always existed, but curve with order 4 has leading control point and clamps only to second one. My explanation is that it is made to mimic pure Blender Bezier control point structure.
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Assuming that is true same leading cp is added to order 3 case (such didn’t exist in current version) also to orders 5 and 6.
- d) now if Bezier and Endpoint are checked together Blender ignores them both. Patch treats such mode as Bezier, but without leading control point from case c). This mode should look more intuitive for user than c).
- e) and f) same as two above only cyclic. Again Endpoint mode removes “leading cp”, so curve is clamped to the first one. In e) curve still clamps as it is Bezier, but starting from second cp.
- h) clamps curve to first control point from both ends giving corner effect. Maybe not that usefull, but result is pretty intuitive.