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speedup cut_polygon_with_line calls by using list of polygons

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This commit is contained in:
Laura Klünder 2017-11-18 20:19:44 +01:00
parent f672ee107a
commit 7f5b614620
2 changed files with 7 additions and 7 deletions
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6
src/c3nav/mapdata/utils/geometry.py
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@ -133,9 +133,9 @@ def cut_line_with_point(line: LineString, point: Point):
def cut_polygon_with_line(polygon: Union[Polygon, MultiPolygon], line: LineString, debug=False) -> Sequence[Polygon]:
orig_polygon = polygon
orig_polygon = assert_multipolygon(polygon) if isinstance(polygon, (MultiPolygon, Polygon)) else polygon
polygons: List[List[LinearRing]] = []
for polygon in assert_multipolygon(polygon):
for polygon in orig_polygon:
rings = getattr(polygon, 'c3nav_cache', None)
if not rings:
rings = [polygon.exterior, *polygon.interiors]
@ -160,7 +160,7 @@ def cut_polygon_with_line(polygon: Union[Polygon, MultiPolygon], line: LineStrin
points = deque(sorted(points, key=lambda p: line.project(p.point)))
if not points:
return tuple(assert_multipolygon(orig_polygon))
return orig_polygon
# go through all points and cut pair-wise
last = points.popleft()