racket/collects/htdp/Test/draw.ss
2005-05-27 18:56:37 +00:00

80 lines
2.4 KiB
Scheme

;; This tests a good portion but needs some more
;; This needs some tests for error behavior of functions ...
;; draw-next-part : symbol -> true
;; consumes one of the seven body-part symbols and draws that part.
(define (draw-next-part body-part)
(cond
[(eq? body-part 'body)
(draw-solid-line (make-posn 100 60)
(make-posn 100 130)
'black)]
[(eq? body-part 'right-leg)
(draw-solid-line (make-posn 100 130)
(make-posn 30 170)
'black)]
[(eq? body-part 'left-leg)
(draw-solid-line (make-posn 100 130)
(make-posn 170 170)
'black)]
[(eq? body-part 'right-arm)
(draw-solid-line (make-posn 100 75)
(make-posn 40 65)
'black)]
[(eq? body-part 'left-arm)
(draw-solid-line (make-posn 100 75)
(make-posn 160 65)
'black)]
[(eq? body-part 'head)
(draw-solid-disk (make-posn 100 50) 10 'black)]
[(eq? body-part 'noose)
(and
(draw-solid-disk (make-posn 120 50) 30 'red)
(draw-solid-line (make-posn 100 30)
(make-posn 100 10)
'black)
(draw-solid-line (make-posn 100 10)
(make-posn 0 10)
'black)
(draw-solid-line (make-posn 115 35)
(make-posn 123 43)
'black)
(draw-solid-line (make-posn 123 35)
(make-posn 115 43)
'black)
(draw-solid-line (make-posn 131 40)
(make-posn 139 48)
'black)
(draw-solid-line (make-posn 139 40)
(make-posn 131 48)
'black))]))
#| Tests ----------------------------------------------------------
|#
(start 200 400)
(sleep-for-a-while 1)
(draw-next-part 'noose)
(sleep-for-a-while 1)
(draw-next-part 'head)
(sleep-for-a-while 1)
(draw-next-part 'left-arm)
(sleep-for-a-while 1)
(draw-next-part 'right-arm)
(sleep-for-a-while 1)
(draw-next-part 'body)
(sleep-for-a-while 1)
(draw-next-part 'left-leg)
(sleep-for-a-while 1)
(draw-next-part 'right-leg)
"please click on the canvas"
(posn? (wait-for-mouse-click))
(stop)
#|
(load "tester.ss")
(start 200 400)
(test-error (draw-solid-line 'a 'b 'c))
|#