POLYLINEPOINT Extract a point from a polyline.

   POINT = polylinePoint(POLYLINE, POS)
   POLYLINE is a N*2 array containing coordinate of polyline vertices
   POS is comprised between 0 (first point of polyline) and Nv-1 (last
   point of the polyline).
   

   Example
   poly = [10 10;20 10;20 20;30 30];
   polylinePoint(poly, 0)
       [10 10]
   polylinePoint(poly, 3)
       [30 30]
   polylinePoint(poly, 1.4)
       [20 14]


   See also
   polygons2d

 ------
 Author: David Legland
 e-mail: david.legland@grignon.inra.fr
 Created: 2009-04-30,    using Matlab 7.7.0.471 (R2008b)
 Copyright 2009 INRA - Cepia Software Platform.

Package: matgeom