(thickness (* flag-thickness factor))
(thickness-offset (cons 0 (* -1 thickness dir)))
(spacing (* -1 flag-spacing factor dir ))
(start (cons (- half-stem-thickness) (* half-stem-thickness dir)))
;; The points of a round-filled-polygon need to be given in clockwise
;; order, otherwise the polygon will be enlarged by blot-size*2!
(thickness (* flag-thickness factor))
(thickness-offset (cons 0 (* -1 thickness dir)))
(spacing (* -1 flag-spacing factor dir ))
(start (cons (- half-stem-thickness) (* half-stem-thickness dir)))
;; The points of a round-filled-polygon need to be given in clockwise
;; order, otherwise the polygon will be enlarged by blot-size*2!