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

                    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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                at.transform(pt, pt);
                positions[0] = pt.x;
                positions[1] = pt.y;


                if (trackPt != null) {
                    at.deltaTransform(trackPt, trackPt);
                }
            }
            for (int i = 0, n = 2; i < glyphs.length(); ++i, n += 2) {
                addDefaultGlyphAdvance(glyphs.charAt(i), pt);
                if (trackPt != null) {

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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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     */
    private static Line2D createSemiInfiniteLine(Point2D start, Point2D unitvector, Graphics2D g) {
        Rectangle bounds = g.getDeviceConfiguration().getBounds();
        try {
            AffineTransform invtrans = g.getTransform().createInverse();
            Point2D widthpoint = invtrans.deltaTransform(new Point2D.Double(bounds.width,0), null);
            Point2D heightpoint = invtrans.deltaTransform(new Point2D.Double(0,bounds.height), null);


            // Here we should end up with a gross overestimate of the maximum viewport diagonal in what
            // Graphics2D calls 'user space'. Essentially a manhattan distance of manhattan distances.
            // This can be used as a safe length of line to generate which will always go off-viewport.

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    private static Line2D createSemiInfiniteLine(Point2D start, Point2D unitvector, Graphics2D g) {
        Rectangle bounds = g.getDeviceConfiguration().getBounds();
        try {
            AffineTransform invtrans = g.getTransform().createInverse();
            Point2D widthpoint = invtrans.deltaTransform(new Point2D.Double(bounds.width,0), null);
            Point2D heightpoint = invtrans.deltaTransform(new Point2D.Double(0,bounds.height), null);


            // Here we should end up with a gross overestimate of the maximum viewport diagonal in what
            // Graphics2D calls 'user space'. Essentially a manhattan distance of manhattan distances.
            // This can be used as a safe length of line to generate which will always go off-viewport.
            double linelength = Math.abs(widthpoint.getX()) + Math.abs(widthpoint.getY()) + Math.abs(heightpoint.getX()) + Math.abs(heightpoint.getY());

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