question: public static Point inverseTransformPoint ( AffineTransform af , Point pt ) { Point2D src = new Point2D . Float ( pt . x , pt . y ) ; try { Point2D dest = af . inverseTransform ( src , null ) ; return new Point ( ( int ) Math . floor ( dest . getX ( ) ) , ( int ) Math . floor ( dest . getY ( ) ) ) ; } catch ( Exception e ) { e . printStackTrace ( ) ; return new Point ( 0 , 0 ) ; } }
target:  Given an arbitrary point, get the point with the inverse given transform.