code: @Override
      public void createCollisionDraw()
      {
          clearCollisionDraw();
  
          final Collection<CollisionFormula> formulas = mapCollision.getCollisionFormulas();
          collisionCache = new HashMap<>(formulas.size());
  
          for (final CollisionFormula collision : formulas)
          {
              final ImageBuffer buffer = createFunctionDraw(collision, map.getTileWidth(), map.getTileHeight());
              collisionCache.put(collision, buffer);
          }
      }
docs: /*
  MapTileCollisionRenderer