Split bullet spawning and bouncing/penetration

src/Dodge/Default/Wall.hs

@@ -13,6 +13,7 @@ defaultWall = Wall
     , _wlSeen = False
     , _wlOpacity    = Opaque
     , _wlPathable   = False
+    , _wlPenetrable = False
     , _wlFireThrough = False
     , _wlTouchThrough = False
     , _wlReflect = False
@@ -41,6 +42,7 @@ defaultMachineWall = defaultWall
     , _wlRotateTo = False
     , _wlStructure = MachinePart 0
     , _wlMaterial  = Metal
+    , _wlPenetrable = True
     }
 defaultDirtWall :: Wall
 defaultDirtWall = defaultWall
@@ -51,6 +53,7 @@ defaultDirtWall = defaultWall
     , _wlOpacity = Opaque
     , _wlRotateTo = False
     , _wlFireThrough = True
+    , _wlPenetrable = True
     , _wlMaterial    = Dirt
     }
 defaultWindow :: Wall
@@ -62,4 +65,5 @@ defaultWindow = defaultWall
     , _wlOpacity = SeeThrough
     , _wlFireThrough = True
     , _wlMaterial    = Glass
+    , _wlPenetrable = True
     }