EDGETOLINE Convert an edge to a straight line.

   LINE = edgeToLine(EDGE);
   Returns the straight line containing the edge EDGE.
   EDGE is represented as [X1 Y1  X2 Y2]
   LINE is represented as [X0 Y0  DX DY]

   Example
       edge = [2 3 4 5];
       line = edgeToLine(edge);
       figure(1); hold on; axis([0 10 0 10]);
       drawLine(line, 'color', 'g')
       drawEdge(edge, 'linewidth', 2)
   
   See also
   edges2d, lines2d, lineToEdge

Package: matgeom