Examples of java.awt.geom.AffineTransform.inverseTransform()

java.awt.geom.AffineTransform.inverseTransform()
Inverse transforms the specified ptSrc and stores the result in ptDst. If ptDst is null, a new Point2D object is allocated and then the result of the transform is stored in this object. In either case, ptDst, which contains the transformed point, is returned for convenience. If ptSrc and ptDst are the same object, the input point is correctly overwritten with the transformed point. @param ptSrc the point to be inverse transformed @param ptDst the resulting transformed point @return ptDst, which contains the result of the inverse transform. @exception NoninvertibleTransformException if the matrix cannot beinverted. @since 1.2

  public boolean contains(float px, float py){
    AffineTransform aff = new AffineTransform();
    aff = getTransform(aff);
    temp[0] = px; temp[1] = py;
    try {
      aff.inverseTransform(temp, 0, temp, 0, 1);
    } catch (NoninvertibleTransformException e) {
      e.printStackTrace();
      return false;
    }
    ox = (float) temp[0] + halfWidth;

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                AffineTransform at = overlay.getOverlayTransform();
                Point2D pt0 = new Point2D.Float(0, 0);
                Point2D pt = new Point2D.Float(dx, dy);


                try {
                    at.inverseTransform(pt0, pt0);
                    at.inverseTransform(pt, pt);
                    double tx = pt0.getX() - pt.getX();
                    double ty = pt0.getY() - pt.getY();
                    at = svgCanvas.getRenderingTransform();
                    at.preConcatenate

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                Point2D pt0 = new Point2D.Float(0, 0);
                Point2D pt = new Point2D.Float(dx, dy);


                try {
                    at.inverseTransform(pt0, pt0);
                    at.inverseTransform(pt, pt);
                    double tx = pt0.getX() - pt.getX();
                    double ty = pt0.getY() - pt.getY();
                    at = svgCanvas.getRenderingTransform();
                    at.preConcatenate
                        (AffineTransform.getTranslateInstance(tx, ty));

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        AffineTransform at = worldToScreenTransform(map, width, height);
    
        Point2D result = null;
    
        try {
            result = at.inverseTransform(new java.awt.geom.Point2D.Double(x, y),
                    new java.awt.geom.Point2D.Double());
        } catch (NoninvertibleTransformException e) {
            throw new RuntimeException(e);
        }

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        AffineTransform at = worldToScreenTransform(map, width, height);


        Point2D result = null;


        try {
            result = at.inverseTransform(new java.awt.geom.Point2D.Double(x, y),
                    new java.awt.geom.Point2D.Double());
        } catch (NoninvertibleTransformException e) {
            throw new RuntimeException(e);
        }

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