* with the given y-coordinate.
     */
    private int getRightColumns(int y) {
        int rightColumns = rightSpace / tileWidth + 1;

        if ((y % 2) == 0) {
            if ((rightSpace % tileWidth) == 0) {
                rightColumns--;
            }
        } else {
            if ((rightSpace % tileWidth) > 32) {
                rightColumns++;
            }
        }

        return rightColumns;
    }