def draw_hatch_entity(self, entity: DXFGraphic,
properties: Properties) -> None:
def to_path(p):
path = Path.from_hatch_boundary_path(p, ocs, elevation)
path.close()
return path
if not self.out.show_hatch:
return
hatch = cast(Hatch, entity)
ocs = hatch.ocs()
# all OCS coordinates have the same z-axis stored as vector (0, 0, z),
# default (0, 0, 0)
elevation = entity.dxf.elevation.z
external_paths = []
holes = []
paths = hatch.paths.rendering_paths(hatch.dxf.hatch_style)
if self.nested_polygon_detection:
polygons = self.nested_polygon_detection(map(to_path, paths))
external_paths, holes = nesting.winding_deconstruction(polygons)
else:
for p in paths:
if p.path_type_flags & const.BOUNDARY_PATH_EXTERNAL:
external_paths.append(to_path(p))
else:
holes.append(to_path(p))
if external_paths:
self.out.draw_filled_paths(external_paths, holes, properties)
elif holes:
# First path is the exterior path, everything else is a hole
self.out.draw_filled_paths([holes[0]], holes[1:], properties)
def test_winding_deconstruction(polygons, exp_ccw, exp_cw):
ccw, cw = nesting.winding_deconstruction(polygons)
assert ccw == exp_ccw
assert cw == exp_cw
