def __check_direct_edge(self, point0, point1):
pc = pyclipper.Pyclipper()
pc.AddPath([point0, point1], pyclipper.PT_SUBJECT, False)
pc.AddPath(self.bound, pyclipper.PT_CLIP, True)
result = pyclipper.OpenPathsFromPolyTree(
pc.Execute2(pyclipper.CT_DIFFERENCE, pyclipper.PFT_EVENODD,
pyclipper.PFT_EVENODD))
if len(result) != 0:
return False
for poly in self.holes:
pc.Clear()
pc.AddPath([point0, point1], pyclipper.PT_SUBJECT, False)
pc.AddPath(poly, pyclipper.PT_CLIP, True)
result = pyclipper.OpenPathsFromPolyTree(
pc.Execute2(pyclipper.CT_DIFFERENCE, pyclipper.PFT_EVENODD,
pyclipper.PFT_EVENODD))
if len(result) != 1 or \
result[0][0][0] != point0[0] or\
result[0][0][1] != point0[1] or\
result[0][1][0] != point1[0] or\
result[0][1][1] != point1[1]:
return False
return True
def test_execute2(self):
pc = pyclipper.PyclipperOffset()
self.add_path(pc, PATH_CLIP_1)
solution = pc.Execute2(2.0)
self.assertIsInstance(solution, pyclipper.PyPolyNode)
self.assertEqual(len(pyclipper.OpenPathsFromPolyTree(solution)), 0)
self.assertEqual(len(pyclipper.ClosedPathsFromPolyTree(solution)), 1)
def clip_lines(lines, contours):
""" Clip lines with contours.
Return collection of open polygons ordered by y axis
"""
# TODO simplify lines
c = pc.Pyclipper()
c.AddPaths(contours, pc.PT_CLIP)
c.AddPaths(lines, pc.PT_SUBJECT, False)
tree = c.Execute2(pc.CT_INTERSECTION)
paths = pc.OpenPathsFromPolyTree(tree)
return _to_ndarrays(paths)
def test_open_paths_from_polytree(self):
paths = pyclipper.OpenPathsFromPolyTree(self.tree)
self.check_paths(paths, 2)