ComputeSailNormal:

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   Find all sail components and calculate their composite normal.
   If no outputs, run a demo and draw the normal in black.

   Since version 7.
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   Form:
   n = ComputeSailNormal( g )
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   ------
   Inputs
   ------
   g        (:)       CAD model data structure

   -------
   Outputs
   -------
   n       (3,1)      Normal vector

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Children:

AeroUtils: CAD/DrawSCPlanPlugIn
Common: Graphics/AddAxes
Math: Linear/Unit