Examples of ae.java.awt.geom.AffineTransform.invert()

ae.java.awt.geom.AffineTransform.invert()

Sets this transform to the inverse of itself. The inverse transform Tx' of this transform Tx maps coordinates transformed by Tx back to their original coordinates. In other words, Tx'(Tx(p)) = p = Tx(Tx'(p)).

If this transform maps all coordinates onto a point or a line then it will not have an inverse, since coordinates that do not lie on the destination point or line will not have an inverse mapping. The getDeterminant method can be used to determine if this transform has no inverse, in which case an exception will be thrown if the invert method is called. @see #getDeterminant @exception NoninvertibleTransformException if the matrix cannot be inverted. @since 1.6

        at.translate(anchor.getX(), anchor.getY());
        at.scale(anchor.getWidth(), anchor.getHeight());


        double xp0, xp1, xp3, yp0, yp1, yp3;
        try {
            at.invert();
            xp0 = at.getScaleX();
            xp1 = at.getShearX();
            xp3 = at.getTranslateX();
            yp0 = at.getShearY();
            yp1 = at.getScaleY();

        at.scale(len, 1);
        // now gradient point 1 is at (0.0, 0), point 2 is at (1.0, 0)


        float p0, p1, p3;
        try {
            at.invert();
            p0 = (float)at.getScaleX();
            p1 = (float)at.getShearX();
            p3 = (float)at.getTranslateX();
        } catch (ae.java.awt.geom.NoninvertibleTransformException e) {
            p0 = p1 = p3 = 0.0f;

        at.rotate(fx - cx, fy - cy);
        at.scale(radius, radius);


        // invert to get mapping from device coords to unit circle
        try {
            at.invert();
        } catch (Exception e) {
            at.setToScale(0.0, 0.0);
        }
        focus = at.transform(focus, focus);

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