Behaviours make objects move in jumps when they are put far from origin.

Hi, i am trying to represent the solar system in java3d, but i have a problem that when you put an object at a point eg.(10000000,10000000,10000000) using a transform3d then attach a behaviour like keyboardbehavior to it, it moves in big jumps instead of smoothly. It will mroe smoothly the closer you are to the origin.
Can anybody give me some help as to why this might be.
Also, Am i using the right type of universe e.g SimpleUniverse, or do I need to use one with a HighresCoord or something.
Thanks

Search Spherical Linear Interpolation.
Gives you smooth transitions between vectors and rotations.
v(t) = (sin(1-t)Q) / sin Q * v1 + (sin(t)Q)/sinQ * v2
where Q is the angle between the two vectors.
Q = acos(v1.dot(v2))
check out http://www.gamedev.net/reference/articles/article1824.asp

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