def get_merged_strokes(strokes):
def extend_stroke(stroke, vertices):
for vert in map(StrokeVertex, vertices):
stroke.insert_vertex(vert, stroke.stroke_vertices_end())
return stroke
base_strokes = tuple(stroke for stroke in strokes if not is_poly_clockwise(stroke))
merged_strokes = OrderedDict((s, list()) for s in base_strokes)
for stroke in filter(is_poly_clockwise, strokes):
for base in base_strokes:
# don't merge when diffuse colors don't match
if diffuse_from_stroke(stroke) != diffuse_from_stroke(stroke):
continue
# only merge when the 'hole' is inside the base
elif stroke_inside_stroke(stroke, base):
merged_strokes[base].append(stroke)
break
# if it isn't a hole, it is likely that there are two strokes belonging
# to the same object separated by another object. let's try to join them
elif (get_object_name(base) == get_object_name(stroke) and
diffuse_from_stroke(stroke) == diffuse_from_stroke(stroke)):
base = extend_stroke(base, (sv for sv in stroke))
break
else:
# if all else fails, treat this stroke as a base stroke
merged_strokes.update({stroke: []})
return merged_strokes
def get_merged_strokes(strokes):
def extend_stroke(stroke, vertices):
for vert in map(StrokeVertex, vertices):
stroke.insert_vertex(vert, stroke.stroke_vertices_end())
return stroke
base_strokes = tuple(stroke for stroke in strokes if not is_poly_clockwise(stroke))
merged_strokes = OrderedDict((s, list()) for s in base_strokes)
for stroke in filter(is_poly_clockwise, strokes):
for base in base_strokes:
# don't merge when diffuse colors don't match
if diffuse_from_stroke(stroke) != diffuse_from_stroke(stroke):
continue
# only merge when the 'hole' is inside the base
elif stroke_inside_stroke(stroke, base):
merged_strokes[base].append(stroke)
break
# if it isn't a hole, it is likely that there are two strokes belonging
# to the same object separated by another object. let's try to join them
elif (get_object_name(base) == get_object_name(stroke) and
diffuse_from_stroke(stroke) == diffuse_from_stroke(stroke)):
base = extend_stroke(base, (sv for sv in stroke))
break
else:
# if all else fails, treat this stroke as a base stroke
merged_strokes.update({stroke: []})
return merged_strokes