normpath.py 文件源码

def intersect(self, other):
        """intersect self with other path

        Returns a tuple of lists consisting of the parameter values
        of the intersection points of the corresponding normpath.
        """
        other = other.normpath()

        # here we build up the result
        intersections = ([], [])

        # Intersect all normsubpaths of self with the normsubpaths of
        # other.
        for ia, normsubpath_a in enumerate(self.normsubpaths):
            for ib, normsubpath_b in enumerate(other.normsubpaths):
                for intersection in zip(*normsubpath_a.intersect(normsubpath_b)):
                    intersections[0].append(normpathparam(self, ia, intersection[0]))
                    intersections[1].append(normpathparam(other, ib, intersection[1]))
        return intersections