simple renderer for tiles

src/c3nav/mapdata/models/geometry/level.py

@@ -54,7 +54,7 @@ class Building(LevelGeometryMixin, models.Model):
         default_related_name = 'buildings'
 
 
-class Space(SpecificLocation, LevelGeometryMixin, models.Model):
+class Space(LevelGeometryMixin, SpecificLocation, models.Model):
     """
     An accessible space. Shouldn't overlap with spaces on the same level.
     """
@@ -74,7 +74,7 @@ class Space(SpecificLocation, LevelGeometryMixin, models.Model):
         return result
 
 
-class Door(AccessRestrictionMixin, LevelGeometryMixin, models.Model):
+class Door(LevelGeometryMixin, AccessRestrictionMixin, models.Model):
     """
     A connection between two spaces
     """
@@ -97,6 +97,7 @@ class AltitudeArea(LevelGeometryMixin, models.Model):
         verbose_name = _('Altitude Area')
         verbose_name_plural = _('Altitude Areas')
         default_related_name = 'altitudeareas'
+        ordering = ('altitude', )
 
     @classmethod
     def recalculate(cls):

src/c3nav/mapdata/models/geometry/space.py

@@ -41,7 +41,7 @@ class Column(SpaceGeometryMixin, models.Model):
         default_related_name = 'columns'
 
 
-class Area(SpecificLocation, SpaceGeometryMixin, models.Model):
+class Area(SpaceGeometryMixin, SpecificLocation, models.Model):
     """
     An area in a space.
     """
@@ -125,7 +125,7 @@ class LineObstacle(SpaceGeometryMixin, models.Model):
         return result
 
 
-class POI(SpecificLocation, SpaceGeometryMixin, models.Model):
+class POI(SpaceGeometryMixin, SpecificLocation, models.Model):
     """
     An point of interest
     """

src/c3nav/mapdata/render/svg.py

@@ -1,9 +1,38 @@
+from django.db.models import Prefetch, Q
+from shapely.geometry import box
+from shapely.ops import unary_union
+
+from c3nav.mapdata.models import AltitudeArea, Building, Door, Level, Space
 from c3nav.mapdata.utils.svg import SVGImage
 
 
 def render_svg(level, miny, minx, maxy, maxx, scale=1):
     svg = SVGImage(bounds=((miny, minx), (maxy, maxx)), scale=scale)
 
-    # todo: render
+    within_coords = (minx-1, miny-1, maxx+1, maxy+1)
+    bbox = box(*within_coords)
+
+    levels = Level.objects.filter(Q(on_top_of=level.pk) | Q(base_altitude__lte=level.base_altitude))
+    levels = levels.prefetch_related(Prefetch('altitudeareas', AltitudeArea.objects.within(*within_coords)),
+                                     Prefetch('buildings', Building.objects.within(*within_coords)),
+                                     Prefetch('spaces', Space.objects.within(*within_coords)),
+                                     Prefetch('doors', Door.objects.within(*within_coords)))
+
+    for level in levels:
+        buildings_geom = bbox.intersection(unary_union([b.geometry for b in level.buildings.all()]))
+        svg.add_geometry(buildings_geom, fill_color='#aaaaaa')
+
+        for altitudearea in level.altitudeareas.all():
+            svg.add_geometry(bbox.intersection(altitudearea.geometry), fill_color='#ececec')
+
+        for space in level.spaces.all():
+            if space.outside:
+                space.geometry = space.geometry.difference(buildings_geom)
+
+        spaces_geom = bbox.intersection(unary_union([s.geometry for s in level.spaces.all()]))
+        doors_geom = bbox.intersection(unary_union([d.geometry for d in level.doors.all()]))
+        doors_geom = doors_geom.difference(spaces_geom)
+
+        svg.add_geometry(spaces_geom, fill_color='#ffffff')
 
     return svg.get_xml()