Enumeration Case


A rule that considers a region to be interior to a path if the winding number for that region is nonzero.


case winding


This rule plots a ray from any region to be evaluated toward the bounds of the drawing, then counts the closed path elements that the ray crosses: +1 for counterclockwise paths, -1 for clockwise. The rule defines interior regions as those where the sum of crossings is nonzero, and exterior regions as those where the sum of crossings is zero.


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