% operand stack configuration in order to use psDrawLines:
%		psDrawLines
%		points[0].y
%		points[0].x
%		n
%		...
%		points[n].y
%		points[n].x
%		graphics-context dictionary
% this draws lines connecting all the points.

/psDrawLines
        {	gsave
                newpath
                yVal moveto
                1 sub {
                        yVal lineto
                } repeat
		begin installGC stroke end
		grestore }
        def