[JAVA3D] PositionPathInterpolator

[PK]

Hi,
   I'm trying to use PositionPathInterpolator to move an object through
fixed points in a scene. In the specification, it says to use it in
the form:

public PositionPathInterpolator(Alpha alpha, TransformGroup  target,
                               Transform3D axisOfTranslation, float knots[],
                               Point3f positions[])

I presume 'Point3f' defines the points you want to move through.
What is the float 'knots' for?
How are the above variables defined?
Is it:
     Point3f positions[3];
     positions[1] = (0.0f, 0.5f, 1.5f);
     positions[2] = .....
     etc.

     float knots[3];
     knots[1] = 1.0f;
     knots[2] = .......
     etc.

I don't really know how to implement PositionPathInterpolator,
could someone point me in the right direction.

Thanks,

PK

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