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

java.awt.geom.AffineTransform.transform()
Transforms the specified ptSrc and stores the result in ptDst. If ptDst is null, a new {@link Point2D}object is allocated and then the result of the transformation 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 specified Point2D to be transformed @param ptDst the specified Point2D that stores theresult of transforming ptSrc @return the ptDst after transformingptSrc and stroring the result in ptDst. @since 1.2

    public Line2D getSecondYAxisLine2D() {
        double xpt = constraints2.getMaximumColumnValue();
        
        AffineTransform at = c.getTransform(CoordSystem.SECOND_YAXIS);
        
        Point2D o = at.transform(new Point2D.Double(xpt, constraints2.getMaximumValue().doubleValue()), null);
        Point2D u = at.transform(new Point2D.Double(xpt, constraints2.getMinimumValue().doubleValue()), null);
        
        return new Line2D.Double(o, u);
    }

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        double xpt = constraints2.getMaximumColumnValue();
        
        AffineTransform at = c.getTransform(CoordSystem.SECOND_YAXIS);
        
        Point2D o = at.transform(new Point2D.Double(xpt, constraints2.getMaximumValue().doubleValue()), null);
        Point2D u = at.transform(new Point2D.Double(xpt, constraints2.getMinimumValue().doubleValue()), null);
        
        return new Line2D.Double(o, u);
    }


}

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      AffineTransform trm = topDown
        ? new AffineTransform(1, 0, 0, -1, 0, scanner.getCanvasSize().getHeight())
        : new AffineTransform();
      trm.concatenate(ctm);
      trm.concatenate(tm);
      return trm.transform(point, null);
    }


    /**
      Resolves the given user-space point to its equivalent device-space one [PDF:1.6:4.2.3],
      expressed in standard PDF coordinate system (lower-left origin).

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        AffineTransform completeInputTransform = inputTransform;


        if (!completeInputTransform.isIdentity()) {
            AffineTransform transform = completeInputTransform;


            Point2D zero = transform.transform(new Point2D.Double(0, 0), null);
            Point2D one = transform.transform(new Point2D.Double(1, 1), null);


            double dx = one.getX() - zero.getX();
            double dy = one.getY() - zero.getY();
            double scale = Math.sqrt(dx*dx + dy*dy)/Math.sqrt(2.0);

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        if (!completeInputTransform.isIdentity()) {
            AffineTransform transform = completeInputTransform;


            Point2D zero = transform.transform(new Point2D.Double(0, 0), null);
            Point2D one = transform.transform(new Point2D.Double(1, 1), null);


            double dx = one.getX() - zero.getX();
            double dy = one.getY() - zero.getY();
            double scale = Math.sqrt(dx*dx + dy*dy)/Math.sqrt(2.0);

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            center.getX() - width / 2, center.getY() - height / 2
        );
        AffineTransform xform = AffineTransform.getRotateInstance(
            angle, center.getX(), center.getY()
        );
        xform.transform(p, p);
        return p;
    }


    public Point2D getUpperRight() {
        Point2D p = new Point2D.Double(

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            center.getX() + width / 2, center.getY() - height / 2
        );
        AffineTransform xform = AffineTransform.getRotateInstance(
            angle, center.getX(), center.getY()
        );
        xform.transform(p, p);
        return p;
    }


    public Point2D getLowerLeft() {
        Point2D p = new Point2D.Double(

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        );
        AffineTransform xform = AffineTransform.getRotateInstance(
            angle, center.getX(), center.getY()
        );
        xform.transform(p, p);
        return p;
    }


    public Point2D getLowerRight() {
        Point2D p = new Point2D.Double(

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            center.getX() + width / 2, center.getY() + height / 2
        );
        AffineTransform xform = AffineTransform.getRotateInstance(
            angle, center.getX(), center.getY()
        );
        xform.transform(p, p);
        return p;
    }


    public CropBounds createInvertedAspect() {
        CropBounds copy = new CropBounds();

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    //Rotation de PI/6 (30D) autour de x1,y1 (p2,point au bout de la fleche)
    affineTransform.setToRotation(Math.PI/6, x1, y1);


    //On applique la transformation au point p4, ce qui donne le point p3
    p3 = affineTransform.transform(p4, null);
    //On trace le premier bout de la fleche (entre l'extremite p2 et le point obtenu p3)
    l = new Line2D.Double(p2, p3);
    g2d.draw(l);


    //Rotation de -PI/6 (-30D) (dans l'autre sens donc) autour de x1,y1

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