Raycaster now controls the sprite locations with SpatialMap rather than the old way. Quick hack job in main.cpp that shows how they can move too.

point.hpp

@@ -17,6 +17,7 @@ typedef std::vector<Point> PointList;
 
 template<> struct std::hash<Point> {
   size_t operator()(const Point& p) const {
-    return std::hash<int>()(p.x) ^ std::hash<int>()(p.y);
+    auto hasher = std::hash<int>();
+    return hasher(p.x) ^ hasher(p.y);
   }
 };