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

java.awt.geom.AffineTransform.deltaTransform()
Transforms the relative distance vector specified by ptSrc and stores the result in ptDst. A relative distance vector is transformed without applying the translation components of the affine transformation matrix using the following equations:
```
 [  x' ]   [  m00  m01 (m02) ] [  x  ]   [ m00x + m01y ] [  y' ] = [  m10  m11 (m12) ] [  y  ] = [ m10x + m11y ] [ (1) ]   [  (0)  (0) ( 1 ) ] [ (1) ]   [     (1)     ] 
```
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 distance vector to be delta transformed @param ptDst the resulting transformed distance vector @return ptDst, which contains the result of thetransformation. @since 1.2

         * represent the amount of scaling GDI will be asked
         * to perform.
         */
        Point2D.Float unitVectorX = new Point2D.Float(1, 0);
        Point2D.Float unitVectorY = new Point2D.Float(0, 1);
        fullTransform.deltaTransform(unitVectorX, unitVectorX);
        fullTransform.deltaTransform(unitVectorY, unitVectorY);


        Point2D.Float origin = new Point2D.Float(0, 0);
        double scaleX = unitVectorX.distance(origin);
        double scaleY = unitVectorY.distance(origin);

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         * to perform.
         */
        Point2D.Float unitVectorX = new Point2D.Float(1, 0);
        Point2D.Float unitVectorY = new Point2D.Float(0, 1);
        fullTransform.deltaTransform(unitVectorX, unitVectorX);
        fullTransform.deltaTransform(unitVectorY, unitVectorY);


        Point2D.Float origin = new Point2D.Float(0, 0);
        double scaleX = unitVectorX.distance(origin);
        double scaleY = unitVectorY.distance(origin);

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                float lineWidth = lineStroke.getLineWidth();
                Point2D.Float penSize = new Point2D.Float(lineWidth,
                                                          lineWidth);


                deviceTransform.deltaTransform(penSize, penSize);
                float deviceLineWidth = Math.min(Math.abs(penSize.x),
                                                 Math.abs(penSize.y));


                /* transform upper left coordinate */
                Point2D.Float ul_pos = new Point2D.Float(x, y);

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            float lineWidth = lineStroke.getLineWidth();
            Point2D.Float penSize = new Point2D.Float(lineWidth, lineWidth);


            AffineTransform deviceTransform = getTransform();
            deviceTransform.deltaTransform(penSize, penSize);


            float deviceLineWidth = Math.min(Math.abs(penSize.x),
                                             Math.abs(penSize.y));


            Point2D.Float begin_pos = new Point2D.Float(xBegin, yBegin);

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            if (isTransformed()) {
                AffineTransform ctx = values.getCharTransform(); // extract rotation
                if (ctx != null) {
                    Point2D.Float pt = new Point2D.Float();
                    pt.setLocation(0, strikethroughOffset);
                    ctx.deltaTransform(pt, pt);
                    strikethroughOffset = pt.y;
                    pt.setLocation(0, strikethroughThickness);
                    ctx.deltaTransform(pt, pt);
                    strikethroughThickness = pt.y;
                    pt.setLocation(0, underlineOffset);

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                    Point2D.Float pt = new Point2D.Float();
                    pt.setLocation(0, strikethroughOffset);
                    ctx.deltaTransform(pt, pt);
                    strikethroughOffset = pt.y;
                    pt.setLocation(0, strikethroughThickness);
                    ctx.deltaTransform(pt, pt);
                    strikethroughThickness = pt.y;
                    pt.setLocation(0, underlineOffset);
                    ctx.deltaTransform(pt, pt);
                    underlineOffset = pt.y;
                    pt.setLocation(0, underlineThickness);

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                    strikethroughOffset = pt.y;
                    pt.setLocation(0, strikethroughThickness);
                    ctx.deltaTransform(pt, pt);
                    strikethroughThickness = pt.y;
                    pt.setLocation(0, underlineOffset);
                    ctx.deltaTransform(pt, pt);
                    underlineOffset = pt.y;
                    pt.setLocation(0, underlineThickness);
                    ctx.deltaTransform(pt, pt);
                    underlineThickness = pt.y;
                }

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                    strikethroughThickness = pt.y;
                    pt.setLocation(0, underlineOffset);
                    ctx.deltaTransform(pt, pt);
                    underlineOffset = pt.y;
                    pt.setLocation(0, underlineThickness);
                    ctx.deltaTransform(pt, pt);
                    underlineThickness = pt.y;
                }
            }
            strikethroughOffset += ssOffset;
            underlineOffset += ssOffset;

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                float x2 = element[j][6];
                float y2 = element[j][7];


                assertEquals(
                        new Point2D.Double(x2, y2),
                        at.deltaTransform(new Point2D.Double(x1, y1), null));
                assertEquals(
                        new Point2D.Float(x2, y2),
                        at.deltaTransform(new Point2D.Float(x1, y1), null));


                Point2D dst = new Point2D.Double();

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                assertEquals(
                        new Point2D.Double(x2, y2),
                        at.deltaTransform(new Point2D.Double(x1, y1), null));
                assertEquals(
                        new Point2D.Float(x2, y2),
                        at.deltaTransform(new Point2D.Float(x1, y1), null));


                Point2D dst = new Point2D.Double();
                assertEquals(
                        new Point2D.Double(x2, y2),
                        at.deltaTransform(new Point2D.Double(x1, y1), dst));

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