How to reset mouse rotation in Java3D?

Question

I am writing a Java Applet sing Java3D and would like to reset the rotation of mouse in MouseRotate behavior when a button is clicked. The relevant codes are as follows:

BoundingSphere bound =
            new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);    

        MouseRotate mouseRotate = new MouseRotate();
                    TransformGroup modelGroup = new TransformGroup();
                    mouseRotate.setTransformGroup(modelGroup);  
                    modelGroup.addChild(mouseRotate);
                    mouseRotate.setSchedulingBounds(bound);

Answer 1

Sorry, my mistake. It seems there is no way to reset MouseRotate without rewriting it.

Second try: Include another TransformGroup as parent of the modelGroup into the scene graph and set its transform to the invert transform of the modelGroup when resetting is denied.

TransformGroup modelGroupReset = new TransformGroup();
TransformGroup modelGroup = new TransformGroup();
modelGroupReset.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
modelGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
modelGroupReset.addChild(modelGroup);

JButton resetButton = new JButton();
resetButton.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        Transform3D t3d = new Transform3D();
        modelGroup.getTransform(t3d);
        t3d.invert();
        modelGroupReset.setTransform(t3d);
    }
});

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