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document altitude area creation and improve performance

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Laura Klünder 2017-08-05 14:35:25 +02:00
parent cb4a4c1b33
commit eff2cefd8f
1 changed files with 18 additions and 9 deletions
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27
src/c3nav/mapdata/models/geometry/level.py
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@ -85,15 +85,16 @@ class AltitudeArea(LevelGeometryMixin, models.Model):
@classmethod
def recalculate(cls):
levels = Level.objects.prefetch_related('buildings', 'doors', 'spaces', 'spaces__columns',
'spaces__obstacles', 'spaces__lineobstacles', 'spaces__holes',
'spaces__stairs', 'spaces__altitudemarkers')
for level in levels:
# collect location areas
all_areas = []
for level in Level.objects.prefetch_related('buildings', 'doors', 'spaces', 'spaces__columns',
'spaces__obstacles', 'spaces__lineobstacles', 'spaces__holes',
'spaces__stairs', 'spaces__altitudemarkers'):
areas = []
stairs = []
spaces = {}
# collect all accessible areas on this level
buildings_geom = cascaded_union(tuple(building.geometry for building in level.buildings.all()))
for space in level.spaces.all():
if space.outside:
@ -107,11 +108,15 @@ class AltitudeArea(LevelGeometryMixin, models.Model):
tuple(h.geometry for h in space.holes.all()))
areas.extend(assert_multipolygon(space.geometry.difference(remove)))
for stair in space.stairs.all():
stairs.extend(assert_multilinestring(stair.geometry.intersection(buffered).difference(remove)))
substairs = tuple(assert_multilinestring(stair.geometry.intersection(buffered).difference(remove)))
for substair in substairs:
substair.space = space.pk
stairs.extend(substairs)
areas = assert_multipolygon(cascaded_union(areas+list(door.geometry for door in level.doors.all())))
areas = [AltitudeArea(geometry=area, level=level) for area in areas]
# assign spaces to areas
for area in areas:
area.spaces = set()
area.connected_to = []
@ -119,9 +124,10 @@ class AltitudeArea(LevelGeometryMixin, models.Model):
if area.geometry.intersects(space.geometry):
area.spaces.add(space.pk)
# divide areas using stairs
for stair in stairs:
for i, area in enumerate(tuple(areas)):
if not stair.intersects(area.geometry):
if stair.space not in area.spaces or not stair.intersects(area.geometry):
continue
divided = assert_multipolygon(area.geometry.difference(stair.buffer(0.0001)))
@ -135,7 +141,10 @@ class AltitudeArea(LevelGeometryMixin, models.Model):
area.connected_to.append(new_area)
areas.append(new_area)
for subarea in (area, new_area):
subarea.spaces = set(space for space in subarea.spaces
if spaces[space].geometry.intersects(subarea.geometry))
if len(subarea.spaces) > 1:
subarea.spaces = set(space for space in subarea.spaces
if spaces[space].geometry.intersects(subarea.geometry))
break
all_areas.extend(areas)