DRAWRAY Draw a ray on the current axis.

   drawRay(RAY)
   With RAY having the syntax: [x0 y0 dx dy], draws the ray starting from
   point (x0 y0) and going to direction (dx dy), clipped with the current
   window axis.

   drawRay(RAY, PARAMS, VALUE)
   Can specify param-pair values.

   H = drawRay(...)
   Returns handle on line object

   See also:
   rays2d, drawLine

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   author : David Legland 
   INRA - TPV URPOI - BIA IMASTE
   created the 31/10/2003.

Package: matgeom