CatmullRomSpline:

Path: OpticalNavigation/Terrain

% Calculate Catmull–Rom for a chain of points with x 1:4
 The curve C will a single y point.
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   Form:
   C = CatmullRomSpline( P )
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   ------
   Inputs
   ------
   P   (1,4) Control y points            
    
   -------
   Outputs
   -------
   C   (1,1) Y point              

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   Reference
   https://en.wikipedia.org/wiki/Centripetal_Catmull%E2%80%93Rom_spline
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