suzanne.soy/racket
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fixed reverse bug

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svn: r9427
This commit is contained in:
Matthias Felleisen 2008-04-23 15:43:20 +00:00
parent b62fef320b
commit c8db94bce7
1 changed files with 12 additions and 6 deletions
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16
collects/htdp/world.ss
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@ -23,6 +23,7 @@ ones.)
Matthew
|#
;; Wed Apr 23 11:42:25 EDT 2008: fixed reverse bug in animation
;; Thu Mar 20 17:15:54 EDT 2008: fixed place-image0, which used shrink off-by-1
;; Mon Sep 17 09:40:39 EDT 2007: run-simulation now allows recordings, too
;; Mon Aug 6 19:50:30 EDT 2007: exporting both add-line from image.ss and scene+line
@ -547,7 +548,7 @@ Matthew
;; Nat World -> Void
;; effects: init event-history, the-delta, the-world, the-world0
(define (install-world delta w)
(set! event-history '())
(reset-event-history)
(set! the-delta delta)
(set! the-world w)
(set! the-world0 w)
@ -678,7 +679,10 @@ Matthew
;; | (list MOUSE MouseEventType)
;; [Listof Evt]
(define event-history '())
;; reset to '() by big-bang
;; -> Void
(define (reset-event-history)
(set! event-history '()))
;; Symbol Any *-> Void
(define (add-event type . stuff)
@ -708,7 +712,7 @@ Matthew
(send img draw dc 0 0 0 0 w h 0 0 #f)
bm)
(define bm (make-bitmap))
(set! bitmap-list (cons make-bitmap bitmap-list))
(set! bitmap-list (cons bm bitmap-list))
(set! image-count (+ image-count 1))
(send bm save-file (format "i~a.png" image-count) 'png))
;; --- choose place
@ -717,7 +721,7 @@ Matthew
[dd (get-directory "Select directory for images" #f cd)])
(if dd dd cd)))
(parameterize ([current-directory target:dir])
(let replay ([ev event-history][world the-world0])
(let replay ([ev (reverse event-history)][world the-world0])
(define img (redraw-callback0 world))
(update-frame (text (format "~a/~a created" image-count total) 18 'red))
(save-image img)
@ -725,7 +729,9 @@ Matthew
[(null? ev) (update-frame (text "creating i-animated.gif" 18 'red))
(create-animated-gif (reverse bitmap-list))
(update-frame img)]
[else (replay (cdr ev) (world-transition world (car ev)))]))))
[else
(let ([world1 (world-transition world (car ev))])
(replay (cdr ev) world1))]))))
;; [Listof (-> bitmap)] -> Void
;; turn the list of thunks into animated gifs