void |
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accepts an input curve xc and a split point p in its interior. It splits xc at the split point into two subcurves xc1 and xc2, such that p is xc1's right endpoint and xc2's left endpoint. The direction of xc is preserved. That is, in case xc is directed from left to right, p becomes xc1's target and c2's source; otherwise, p becomes xc2's target and xc1's source. |