UnitVectorAverage:

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   Average unit vector.
   Creates a unit vector that lies in the plane created by u1 and u2.
   The vector is midway between the vectors.
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   Form:
   uA = UnitVectorAverage( u1, u2 )
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   ------
   Inputs
   ------
   u1                 (3,1) Unit vector
   u2                 (3,1) Unit vector

   -------
   Outputs
   -------
   uA                 (3,1) Average unit vector

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Children:

Common: Graphics/XLabelS
Common: Graphics/YLabelS
Common: Graphics/ZLabelS
Common: Math/Cross
Common: Math/Unit