FFEccHexahedronGeometry:

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   Compute the geometric goals for a formation that achieves a hexahedron 
   shape at a given true anomaly in an eccentric reference orbit.
   The hexahedral configuration has 5 points and forms two stacked 
   tetrahedra -- one pointing up, the other pointing down.

   Since version 7.
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   Usage:
   g = FFEccHexahedronGeometry( nu, d, eul );
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   ------
   Inputs
   ------
   nu          (1)  True anomaly where hexahedron occurs
   d           (1)  Length of each side
   eul        (3,1) Euler angles defining the orientation
   -------
   Outputs
   -------
   g           (.)  Geometric goals data structure
   
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Children:

FormationFlying: EccDynamics/FFEccGoals
FormationFlying: EccDynamics/FFEccProp
FormationFlying: Transformation/FFEccGoals2Hills
FormationFlying: Utility/Hexahedron
Math: Linear/DupVect
Math: Linear/Mag
Plotting: GUI/AnimationGUI