Polygonal lines in the plane

See Section 27.8.4 for polygonal lines in space.

The open_polygon command draws a polygonal path.

open_polygon takes an arbitrary number of points:
points, a sequence or list of points.
open_polygon(points) returns and draws the polygon line with the vertices given by the points.

open_polygon(-1,-1+i/2,i,1+i,-i)

open_polygon(makelist(x->exp(i*pi*x/3),0,5,1))