code: private void removePoints(double x, double y, Collidable collidable)
      {
          final int minX = (int) Math.floor(x / REDUCE_FACTOR);
          final int minY = (int) Math.floor(y / REDUCE_FACTOR);
          final int maxX = (int) Math.floor((x + collidable.getMaxWidth()) / REDUCE_FACTOR);
          final int maxY = (int) Math.floor((y + collidable.getMaxHeight()) / REDUCE_FACTOR);
  
          removePoints(minX, minY, maxX, maxY, collidable);
      }
docs: Remove point and adjacent points depending of the collidable max collision size.
  
  @param x The horizontal location.
  @param y The vertical location.
  @param collidable The collidable reference.