CIRCLE3DPOSITION Return the angular position of a point on a 3D circle.

   POS = circle3dPosition(POINT, CIRCLE)
   Returns angular position of point on the circle, in degrees, between 0
   and 360.
   with POINT: [xp yp zp]
   and CIRCLE: [X0 Y0 Z0 R THETA PHI] or [X0 Y0 Z0 R THETA PHI PSI]
   (THETA being the colatitude, and PHI the azimut)

   See also:
   circles3d, circle3dOrigin, circle3dPoint

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   author : David Legland 
   INRA - TPV URPOI - BIA IMASTE
   created the 21/02/2005

Package: matgeom