archipack_polylib.py 文件源码

def intersect(self, segment):
        """ point_sur_segment return
            p: point d'intersection
            u: param t de l'intersection sur le segment courant
            v: param t de l'intersection sur le segment segment
        """
        v2d = self.vect_2d
        c2 = np.cross(segment.vect_2d, (0, 0, 1))
        d = np.dot(v2d, c2)
        if d == 0:
            # segments paralleles
            segment._point_sur_segment(self.c0)
            segment._point_sur_segment(self.c1)
            self._point_sur_segment(segment.c0)
            self._point_sur_segment(segment.c1)
            return False, 0, 0, 0
        c1 = np.cross(v2d, (0, 0, 1))
        v3 = self.c0.vect(segment.c0)
        v3[2] = 0.0
        u = np.dot(c2, v3) / d
        v = np.dot(c1, v3) / d
        co = self.lerp(u)
        return True, co, u, v