ANGLEPOINTS3D Compute angle between three 3D points.

   ALPHA = anglePoints3d(P1, P2)
   Computes angle (P1, O, P2), in radians, between 0 and PI.

   ALPHA = anglePoints3d(P1, P2, P3)
   Computes angle (P1, P2, P3), in radians, between 0 and PI.

   ALPHA = anglePoints3d(PTS)
   PTS is a 3x3 or 2x3 array containing coordinate of points.

   See also
   points3d, angles3d

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

Package: matgeom