question: public ShapeTileBox bounding_box ( ) { PlaPointInt lower_left = new PlaPointInt ( Math . floor ( v_x ) , Math . floor ( v_y ) ) ; PlaPointInt upper_right = new PlaPointInt ( Math . ceil ( v_x ) , Math . ceil ( v_y ) ) ; return new ShapeTileBox ( lower_left , upper_right ) ; }
target:  Creates the smallest IntBox containing this point.