You aren't using Unity, are you?

You control the position of the objects rendered on a target. For each target you get a pose matrix that places the target at the origin of its own coordinate system, with (0, 0, 0) at the center of the target. If you render an object without any transforms it should sit on the center of the target. If you want to move the object on the target you apply a translation. Positive X is to the right of the center, positive Y is towards the top, and positive Z is coming up and out of the target (perpendicular to it).

- Kim

Yes you are right indeed. I am not using Unity, should I be using it ? I am using 3ds Max for creating my 3d objects. Does Unity has any other advantages?
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Thanks, but am really stuck at this point. I want to check if a target collides i.e, touches other target. How can I achieve it ?

Thanks!
tckb