#lang racket
(require (planet wcy/mpost-wrapper))
(provide main)
(define (main)
  (let* ((p (path (point 0 0) (dir-spec 'up) '..
                  (point '2cm 0) (dir-spec 'down)))
         (A (point-of 0 p)))
    (draw p)
    (for ((i (in-list (list 0 0.5 1))))
         (let* ((A (point-of i p))
                (B (op+ A (polar '1cm (op-angle (direction-of i p))))))
           (drawarrow (op-- A B) #:withpen (scale '1bp 'pencircle))))))