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Hi,
I have two puntual questions:
1. I want to know if there's a way to make a sor that revolves in an angle
smaller than 2*Pi.
2. Is it possible to do portions of primitive shapes (spheres, cones,
cylinders, torus) in a simple and fast way?. for example halfs or quarters
of spheres or cones.
Thanks for your any hint.
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