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

    //Rotation de -PI/6 (-30D) (dans l'autre sens donc) 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);


    if (this.doubleFleche) {

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        affineTransform = new AffineTransform();
        affineTransform.setToRotation(Math.PI/6, x2, y2);
        
        g2d.setColor(Color.RED);
        p3 = affineTransform.transform(p4, null);
        l = new Line2D.Double(p1, p3);
        g2d.draw(l);
        
        affineTransform.setToRotation(-Math.PI/6, x2, y2);

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        l = new Line2D.Double(p1, p3);
        g2d.draw(l);
        
        affineTransform.setToRotation(-Math.PI/6, x2, y2);
        
        p3 = affineTransform.transform(p4, null);
        l = new Line2D.Double(p1, p3);
        g2d.draw(l);
    }
  }

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        ptSrc[3] = minY;
        ptSrc[4] = minX + width;
        ptSrc[5] = minY + height;
        ptSrc[6] = minX;
        ptSrc[7] = minY + height;
        trans.transform(ptSrc, 0, ptDst, 0, 4);
        
        minX = Math.min(ptDst[0], ptDst[2]);
        minX = Math.min(minX, ptDst[4]);
        minX = Math.min(minX, ptDst[6]);

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        pts[1] = new Point2D.Float((sx0+sw), sy0);
        pts[2] = new Point2D.Float((sx0+sw), (sy0+sh));
        pts[3] = new Point2D.Float(sx0, (sy0+sh));


        // Forward map
        rotate.transform(pts, 0, pts, 0, 4);


        float dx0 =  Float.MAX_VALUE;
        float dy0 =  Float.MAX_VALUE;
        float dx1 = -Float.MAX_VALUE;
        float dy1 = -Float.MAX_VALUE;

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        pts[1] = new Point2D.Float((sx0+sw), sy0);
        pts[2] = new Point2D.Float((sx0+sw), (sy0+sh));
        pts[3] = new Point2D.Float(sx0, (sy0+sh));


        // Forward map
        forward_tr.transform(pts, 0, pts, 0, 4);


        float dx0 =  Float.MAX_VALUE;
        float dy0 =  Float.MAX_VALUE;
        float dx1 = -Float.MAX_VALUE;
        float dy1 = -Float.MAX_VALUE;

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        af.translate(rect.getTranslateX(),rect.getTranslateY());
        af.translate(rect.getAnchorX(), rect.getAnchorY());
        af.rotate(Math.toRadians(rect.getRotate()));
        af.scale(rect.getScaleX(), rect.getScaleY());
        af.translate(-rect.getAnchorX(), -rect.getAnchorY());
        return af.transform(new Point2D.Double(x,y),null);
    }


    private void resetAnchor() {
        //rect.setAnchorX(rect.getX() + rect.getWidth() / 2);
        //rect.setAnchorY(rect.getY() + rect.getHeight() / 2);

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            af.translate(node.getTranslateX(),node.getTranslateY());
            af.translate(node.getAnchorX(),node.getAnchorY());
            af.rotate(Math.toRadians(node.getRotate()));
            af.scale(node.getScaleX(), node.getScaleY());
            af.translate(-node.getAnchorX(), -node.getAnchorY());
            Point2D pt2 = af.transform(pt, null);
            return new Point2D.Double(pt2.getX(),pt2.getY());
        }
        return new Point2D.Double(pt.getX(),pt.getY());
    }

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        //
        // Transform the hot spot from image space to cursor space
        //
        AffineTransform at = f.getAffine();
        at.transform(hotSpot, hotSpot);


        //
        // In all cases, clip to the cursor boundaries
        //
        Rectangle cursorViewport

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                tempLogicalBounds[i] = tr.createTransformedShape(glyphBounds);


                Point2D tp1 = new Point2D.Double();
                Point2D tp2 = new Point2D.Double();
                Point2D tp3 = new Point2D.Double();
                tr.transform(p1, tp1);
                tr.transform(p2, tp2);
                tr.transform(p3, tp3);
                double tdx12 = tp1.getX()-tp2.getX();
                double tdx13 = tp1.getX()-tp3.getX();
                double tdy12 = tp1.getY()-tp2.getY();

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