LambdaToConeClock3D:

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   Generates the optimal cone and clock angles for 3D problems.

   Since version 7.
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   Form:
   [a, cone, clock] = LambdaToConeClock3D( x, type, d )
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   ------
   Inputs
   ------
   x          (12,:)  [x;lambda];
   type       (1,:)   'cartesian' 'equinoctial'
   d          (1,1)   Data structure

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   Outputs
   -------
   a          (3,:)   Acceleration vector 
   cone       (1,:)   Cone angle
   clock      (1,:)   Clock angle

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