Java SE (Java Platform, Standard Edition)

Hi,

I have a simple Java3D modelling app, which I am trying to hook up a basic Raytracer to.

Scene Graph looks something like the following:

                 VirtualUniverse, etc
                          |
                       Locale
                          |
                     /         \
    ContentBranchGroup         ViewsBranchGroup
            |                          |
           ...                 TransformGroup [*]
                                       |
                                 ViewPlatform  -  View

I have a simple mouse pan behaviour, a mouse zoom behaviour, and a mouse orbit behaviour that all modify the Transform Group marked with a [*] above, thereby changing the "camera" by which the user looks at the scene. The behaviours work very well.

I am trying to hook the raytracer up to "look" through this camera. (I have all the other raytracer stuff working)

The raytracer requires the following:
- The camera eye position
- The camera target (look at) position
- The camera up vector

I am trying to extract this information from the [*] marked TransformGroup's Transform3D object but it is very difficult. I can get the eye position using the transform3D.get(Vector3d) method.

I have tried so many ways to get the target and up vectors. I know the principles to get them but the Transform3D get() methods are to say the least, a nightmare, for me to work with. CAN ANYBODY HELP ME?

If it helps I have managed to get the Euler angles for the camera rotation (converting the rotation Quaternion)...

What next? Please...!

Thanks in advance