Initial pass at shadows from level geometry

src/Dodge/LevelGen/Data.hs

@@ -4,6 +4,7 @@ module Dodge.LevelGen.Data
     where
 import Dodge.Data
 import Picture
+import Polyhedra.Data
 
 import Control.Lens
 import Control.Monad.State
@@ -22,7 +23,7 @@ data PSType = PutCrit {_unPutCrit :: Creature}
     | PutBtDoor Color Point2 Float Point2 Point2
     | PutSwitchDoor Color Point2 Float Point2 Point2
     | RandPS (State StdGen PSType)
-    | PutForeground Picture
+    | PutForeground [Polyhedra]
     | PutNothing
     | PutID { _putID :: Int}
 data PlacementSpot = PS