172 lines
8.3 KiB
Python
172 lines
8.3 KiB
Python
from itertools import chain
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from django.core.cache import cache
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from django.utils.functional import cached_property
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from shapely import prepared
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from shapely.geometry import box
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from c3nav.mapdata.models import Level, MapUpdate
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from c3nav.mapdata.render.engines.base import FillAttribs, StrokeAttribs
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from c3nav.mapdata.render.geometry import hybrid_union
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from c3nav.mapdata.render.renderdata import LevelRenderData
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from c3nav.mapdata.utils.cache import MapHistory
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class MapRenderer:
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def __init__(self, level, minx, miny, maxx, maxy, scale=1, access_permissions=None, full_levels=False):
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self.level = level.pk if isinstance(level, Level) else level
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self.minx = minx
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self.miny = miny
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self.maxx = maxx
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self.maxy = maxy
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self.scale = scale
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self.access_permissions = set(access_permissions) if access_permissions else set()
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self.full_levels = full_levels
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self.width = int(round((maxx - minx) * scale))
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self.height = int(round((maxy - miny) * scale))
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@cached_property
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def bbox(self):
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return box(self.minx-1, self.miny-1, self.maxx+1, self.maxy+1)
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@cached_property
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def level_render_data(self):
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return LevelRenderData.get(self.level)
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@cached_property
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def last_update(self):
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return MapHistory.open_level_cached(self.level, 'composite').last_update(self.minx, self.miny,
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self.maxx, self.maxy)
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@cached_property
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def update_cache_key(self):
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return MapUpdate.build_cache_key(*self.last_update)
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@cached_property
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def affected_access_restrictions(self):
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cache_key = 'mapdata:affected-ars-%.2f-%.2f-%.2f-%.2f:%s' % (self.minx, self.miny, self.maxx, self.maxy,
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self.update_cache_key)
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result = cache.get(cache_key, None)
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if result is None:
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result = set(ar for ar, area in self.level_render_data.access_restriction_affected.items()
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if area.intersects(self.bbox))
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cache.set(cache_key, result, 120)
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return result
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@cached_property
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def unlocked_access_restrictions(self):
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return self.affected_access_restrictions & self.access_permissions
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@cached_property
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def access_cache_key(self):
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return '_'.join(str(i) for i in sorted(self.unlocked_access_restrictions)) or '0'
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@cached_property
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def cache_key(self):
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return self.update_cache_key + ':' + self.access_cache_key
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def render(self, engine_cls, center=True):
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engine = engine_cls(self.width, self.height, self.minx, self.miny,
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scale=self.scale, buffer=1, background='#DCDCDC', center=center)
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# add no access restriction to “unlocked“ access restrictions so lookup gets easier
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unlocked_access_restrictions = self.unlocked_access_restrictions | set([None])
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bbox = prepared.prep(self.bbox)
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if self.full_levels:
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levels = tuple(chain(*(
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tuple(sublevel for sublevel in LevelRenderData.get(level.pk).levels
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if sublevel.pk == level.pk or sublevel.on_top_of_id == level.pk)
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for level in self.level_render_data.levels if level.on_top_of_id is None
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)))
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else:
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levels = self.level_render_data.levels
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min_altitude = min(chain(*(tuple(area.altitude for area in geoms.altitudeareas)
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for geoms in levels)))
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not_full_levels = not self.full_levels and engine.is_3d
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full_levels = self.full_levels and engine.is_3d
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for i, geoms in reversed(tuple(enumerate(reversed(levels)))):
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if not bbox.intersects(geoms.affected_area):
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continue
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engine.add_group('level_%s' % geoms.short_label)
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# hide indoor and outdoor rooms if their access restriction was not unlocked
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add_walls = hybrid_union(tuple(area for access_restriction, area in geoms.restricted_spaces_indoors.items()
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if access_restriction not in unlocked_access_restrictions))
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crop_areas = hybrid_union(
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tuple(area for access_restriction, area in geoms.restricted_spaces_outdoors.items()
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if access_restriction not in unlocked_access_restrictions)
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).union(add_walls)
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if not_full_levels:
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engine.add_geometry(geoms.walls_base, fill=FillAttribs('#aaaaaa'), category='walls')
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engine.add_geometry(geoms.walls_bottom.fit(scale=geoms.min_altitude-min_altitude,
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offset=min_altitude-int(0.7*1000)),
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fill=FillAttribs('#aaaaaa'), category='walls')
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for i, altitudearea in enumerate(geoms.altitudeareas):
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base = altitudearea.base.difference(crop_areas)
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bottom = altitudearea.bottom.difference(crop_areas)
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engine.add_geometry(base, fill=FillAttribs('#eeeeee'), category='ground', item=i)
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engine.add_geometry(bottom.fit(scale=geoms.min_altitude - min_altitude,
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offset=min_altitude - int(0.7 * 1000)),
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fill=FillAttribs('#aaaaaa'), category='ground')
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# render altitude areas in default ground color and add ground colors to each one afterwards
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# shadows are directly calculated and added by the engine
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for i, altitudearea in enumerate(geoms.altitudeareas):
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geometry = altitudearea.geometry.difference(crop_areas)
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if not_full_levels:
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geometry = geometry.filter(bottom=False)
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engine.add_geometry(geometry, altitude=altitudearea.altitude, fill=FillAttribs('#eeeeee'),
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category='ground', item=i)
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i = 0
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for color, areas in altitudearea.colors.items():
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# only select ground colors if their access restriction is unlocked
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areas = tuple(area for access_restriction, area in areas.items()
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if access_restriction in unlocked_access_restrictions)
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if areas:
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i += 1
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engine.add_geometry(hybrid_union(areas), fill=FillAttribs(color),
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category='groundcolor%s' % i, item=i)
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for height, obstacle in altitudearea.obstacles.items():
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engine.add_geometry(obstacle, fill=FillAttribs('#cccccc'), category='obstacles')
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# add walls, stroke_px makes sure that all walls are at least 1px thick on all zoom levels,
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walls = None
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if not add_walls.is_empty or not geoms.walls.is_empty:
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walls = geoms.walls.union(add_walls)
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walls_extended = geoms.walls_extended and full_levels
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if walls is not None:
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engine.add_geometry(walls.filter(bottom=not not_full_levels,
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top=not walls_extended),
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height=geoms.default_height, fill=FillAttribs('#aaaaaa'), category='walls')
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for short_wall in geoms.short_walls:
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engine.add_geometry(short_wall.filter(bottom=not not_full_levels),
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height=geoms.default_height, fill=FillAttribs('#aaaaaa'), category='walls')
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if walls_extended:
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engine.add_geometry(geoms.walls_extended, fill=FillAttribs('#aaaaaa'), category='walls')
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doors_extended = geoms.doors_extended and full_levels
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if not geoms.doors.is_empty:
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engine.add_geometry(geoms.doors.difference(add_walls).filter(top=not doors_extended),
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fill=FillAttribs('#ffffff'),
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stroke=StrokeAttribs('#ffffff', 0.05, min_px=0.2),
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category='doors')
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if doors_extended:
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engine.add_geometry(geoms.doors_extended, fill=FillAttribs('#aaaaaa'), category='doors')
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if walls is not None:
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engine.add_geometry(walls, stroke=StrokeAttribs('#666666', 0.05, min_px=0.2), category='walls')
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return engine
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