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