def test_get_offset_polygons_truncated_square_inside_small_offset():
"""This tests a "truncated square", which is a square with the
corners shaved off, and an inside offset that's small compared to
the corner chamfers."""
# 'expected_inside_p' is the expected offset polygon with a *negative*
# offset, so it's inside the input polygon.
lines = (Line((1.4142135623730951, 1.0, 0.0),
(8.585786437626904, 1.0, 0.0)),
Line((8.585786437626904, 1.0, 0.0),
(9.0, 1.4142135623730951, 0.0)),
Line((9.0, 1.4142135623730951, 0.0),
(9.0, 8.585786437626904, 0.0)),
Line((9.0, 8.585786437626904, 0.0),
(8.585786437626904, 9.0, 0.0)),
Line((8.585786437626904, 9.0, 0.0),
(1.4142135623730951, 9.0, 0.0)),
Line((1.4142135623730951, 9.0, 0.0),
(1.0, 8.585786437626904, 0.0)),
Line((1.0, 8.585786437626904, 0.0),
(1.0, 1.4142135623730951, 0.0)),
Line((1.0, 1.4142135623730951, 0.0),
(1.4142135623730951, 1.0, 0.0)))
expected_inside_p = Polygon()
for line in lines:
expected_inside_p.append(line)
output_p = truncated_square_p.get_offset_polygons(-1)
print("get_offset_polygons() returned:")
for p in output_p:
print(str(p))
assert (len(output_p) == 1)
assert_polygons_are_identical(output_p[0], expected_inside_p)
def test_get_offset_polygons_square_inside():
# 'expected_inside_p' is the expected offset polygon with a *negative*
# offset, so it's inside the input polygon.
lines = (Line((1, 1, 0), (9, 1, 0)), Line(
(9, 1, 0), (9, 9, 0)), Line((9, 9, 0),
(1, 9, 0)), Line((1, 9, 0), (1, 1, 0)))
expected_inside_p = Polygon()
for line in lines:
expected_inside_p.append(line)
output_p = square_p.get_offset_polygons(-1)
print("get_offset_polygons() returned:")
for p in output_p:
print(str(p))
assert (len(output_p) == 1)
assert_polygons_are_identical(output_p[0], expected_inside_p)
def append(self, item, unify_overlaps=False, allow_reverse=False):
super(ContourModel, self).append(item)
if isinstance(item, Line):
item_list = [item]
if allow_reverse:
item_list.append(Line(item.p2, item.p1))
found = False
# Going back from the end to start. The last line_group always has
# the highest chance of being suitable for the next line.
line_group_indexes = range(len(self._line_groups) - 1, -1, -1)
for line_group_index in line_group_indexes:
line_group = self._line_groups[line_group_index]
for candidate in item_list:
if line_group.is_connectable(candidate):
line_group.append(candidate)
self._merge_polygon_if_possible(
line_group, allow_reverse=allow_reverse)
found = True
break
if found:
break
else:
# add a single line as part of a new group
new_line_group = Polygon(plane=self._plane)
new_line_group.append(item)
self._line_groups.append(new_line_group)
elif isinstance(item, Polygon):
if not unify_overlaps or (len(self._line_groups) == 0):
self._line_groups.append(item)
for subitem in next(item):
self._update_limits(subitem)
else:
# go through all polygons and check if they can be combined
is_outer = item.is_outer()
new_queue = [item]
processed_polygons = []
queue = self.get_polygons()
while len(queue) > 0:
polygon = queue.pop()
if polygon.is_outer() != is_outer:
processed_polygons.append(polygon)
else:
processed = []
while len(new_queue) > 0:
new = new_queue.pop()
if new.is_polygon_inside(polygon):
# "polygon" is obsoleted by "new"
processed.extend(new_queue)
break
elif polygon.is_polygon_inside(new):
# "new" is obsoleted by "polygon"
continue
elif not new.is_overlap(polygon):
processed.append(new)
continue
else:
union = polygon.union(new)
if union:
for p in union:
if p.is_outer() == is_outer:
new_queue.append(p)
else:
processed_polygons.append(p)
else:
processed.append(new)
break
else:
processed_polygons.append(polygon)
new_queue = processed
while len(self._line_groups) > 0:
self._line_groups.pop()
log.info("Processed polygons: %s",
[len(p.get_lines()) for p in processed_polygons])
log.info("New queue: %s",
[len(p.get_lines()) for p in new_queue])
for processed_polygon in processed_polygons + new_queue:
self._line_groups.append(processed_polygon)
# TODO: this is quite expensive - can we do it differently?
self.reset_cache()
else:
# ignore any non-supported items (they are probably handled by a
# parent class)
pass
assert len(lines0) == len(lines1)
for i in range(len(lines0)):
line0 = lines0[i]
line1 = lines1[i]
(p00, p01) = line0.get_points()
(p10, p11) = line1.get_points()
assert p00 == p10
assert p01 == p11
# "square_p" is a polygon consisting of a simple square,
# counter-clockwise.
lines = (Line((0, 0, 0), (10, 0, 0)), Line(
(10, 0, 0), (10, 10, 0)), Line((10, 10, 0),
(0, 10, 0)), Line((0, 10, 0), (0, 0, 0)))
square_p = Polygon()
for line in lines:
square_p.append(line)
# "truncated_square_p" is a polygon consisting of a simple square
# (counter-clockwise), but with the sharp corners replaced by small
# chamfers.
lines = (Line((1, 0, 0), (9, 0, 0)), Line(
(9, 0, 0), (10, 1, 0)), Line(
(10, 1, 0), (10, 9, 0)), Line(
(10, 9, 0), (9, 10, 0)), Line(
(9, 10, 0), (1, 10, 0)), Line(
(1, 10, 0), (0, 9, 0)), Line(
(0, 9, 0), (0, 1, 0)), Line((0, 1, 0), (1, 0, 0)))
truncated_square_p = Polygon()
for line in lines:
assert len(lines0) == len(lines1)
for i in range(len(lines0)):
line0 = lines0[i]
line1 = lines1[i]
(p00, p01) = line0.get_points()
(p10, p11) = line1.get_points()
assert p00 == p10
assert p01 == p11
# "square_p" is a polygon consisting of a simple square,
# counter-clockwise.
lines = (Line((0, 0, 0), (10, 0, 0)), Line(
(10, 0, 0), (10, 10, 0)), Line((10, 10, 0),
(0, 10, 0)), Line((0, 10, 0), (0, 0, 0)))
square_p = Polygon()
for line in lines:
square_p.append(line)
def test_get_offset_polygons_square_outside():
# 'expected_outside_p' is the expected offset polygon with a
# *positive* offset, so it's outside the input polygon.
lines = (Line((-1, -1, 0), (11, -1, 0)), Line(
(11, -1, 0), (11, 11, 0)), Line(
(11, 11, 0), (-1, 11, 0)), Line((-1, 11, 0), (-1, -1, 0)))
expected_outside_p = Polygon()
for line in lines:
expected_outside_p.append(line)
output_p = square_p.get_offset_polygons(1)
def append(self, item, unify_overlaps=False, allow_reverse=False):
super(ContourModel, self).append(item)
if isinstance(item, Line):
item_list = [item]
if allow_reverse:
item_list.append(Line(item.p2, item.p1))
found = False
# Going back from the end to start. The last line_group always has
# the highest chance of being suitable for the next line.
line_group_indexes = xrange(len(self._line_groups) - 1, -1, -1)
for line_group_index in line_group_indexes:
line_group = self._line_groups[line_group_index]
for candidate in item_list:
if line_group.is_connectable(candidate):
line_group.append(candidate)
self._merge_polygon_if_possible(line_group,
allow_reverse=allow_reverse)
found = True
break
if found:
break
else:
# add a single line as part of a new group
new_line_group = Polygon(plane=self._plane)
new_line_group.append(item)
self._line_groups.append(new_line_group)
elif isinstance(item, Polygon):
if not unify_overlaps or (len(self._line_groups) == 0):
self._line_groups.append(item)
for subitem in item.next():
self._update_limits(subitem)
else:
# go through all polygons and check if they can be combined
is_outer = item.is_outer()
new_queue = [item]
processed_polygons = []
queue = self.get_polygons()
while len(queue) > 0:
polygon = queue.pop()
if polygon.is_outer() != is_outer:
processed_polygons.append(polygon)
else:
processed = []
while len(new_queue) > 0:
new = new_queue.pop()
if new.is_polygon_inside(polygon):
# "polygon" is obsoleted by "new"
processed.extend(new_queue)
break
elif polygon.is_polygon_inside(new):
# "new" is obsoleted by "polygon"
continue
elif not new.is_overlap(polygon):
processed.append(new)
continue
else:
union = polygon.union(new)
if union:
for p in union:
if p.is_outer() == is_outer:
new_queue.append(p)
else:
processed_polygons.append(p)
else:
processed.append(new)
break
else:
processed_polygons.append(polygon)
new_queue = processed
while len(self._line_groups) > 0:
self._line_groups.pop()
print "Processed polygons: %s" % str([len(p.get_lines())
for p in processed_polygons])
print "New queue: %s" % str([len(p.get_lines())
for p in new_queue])
for processed_polygon in processed_polygons + new_queue:
self._line_groups.append(processed_polygon)
# TODO: this is quite expensive - can we do it differently?
self.reset_cache()
else:
# ignore any non-supported items (they are probably handled by a
# parent class)
pass