suzanne.soy/racket
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

world finalized for now

Browse Source 
svn: r6134
This commit is contained in:
Matthias Felleisen 2007-05-04 02:23:02 +00:00
parent c8f158f5d5
commit 4f40c72d65
2 changed files with 19 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
collects/htdp/Test/world.ss
View File

@ -1,3 +1,6 @@
;; The first three lines of this file were inserted by DrScheme. They record metadata
;; about the language level of this file in a form that our tools can easily process.
#reader(lib "htdp-intermediate-lambda-reader.ss" "lang")((modname world) (read-case-sensitive #t) (htdp-settings #7(#t constructor repeating-decimal #f #t none #f)))
;; testing world
;; World = Nat

40
collects/htdp/world.ss
View File

@ -1,8 +1,3 @@
#| TODO
- image manipulation functions should accept plain numbers, not insist on nat
- make scene distinct from image?
|#
#|
At Thu, 21 Dec 2006 14:10:35 -0500, Matthias Felleisen wrote:
2. The history mechanism collects a record in a list for every event.
@ -10,10 +5,8 @@ At Thu, 21 Dec 2006 14:10:35 -0500, Matthias Felleisen wrote:
callbacks.
Say we get 50 events at the upper limit per second.
After playing for one minute, the event list contains 3,000 records.
After playing for ten minutes, the event list contains 30,000
records.
Each record consists of, on the average, 3 numbers, so it's like
gathering
After playing for ten minutes, the event list contains 30,000 records.
Each record consists of, on the average, 3 numbers, so it's like gathering
a list of 100,000 numbers.
Is this going to become a bottleneck?
@ -30,6 +23,7 @@ ones.)
Matthew
|#
;; Thu May 3 22:06:16 EDT 2007: scene # image; pasteboard% for text%
;; Sat Apr 28 13:31:02 EDT 2007: fixed the image and animated-gif thing, using Matthew's lib
;; Fri Dec 22 11:51:53 EST 2006: cleaned up the callback code with macro
;; Thu Dec 21 13:59:23 EST 2006: fixed add-line and place-image to accept numbers
@ -268,17 +262,7 @@ Matthew
(define (on-redraw f)
(check-proc 'on-redraw f 1 "on-redraw" "one argument")
(check-world 'on-redraw)
(set-redraw-callback
(lambda (x)
(define result (f x))
(define fname (object-name f))
(define tname (if fname fname 'your-redraw-function))
(if (image? result)
(check-result tname scene? "scene" result
(format "image with pinhole at (~s,~s)"
(pinhole-x result) (pinhole-y result)))
(check-result tname (lambda (x) (image? x)) "scene"))
result))
(set-redraw-callback f)
(redraw-callback)
#t)
@ -346,12 +330,12 @@ Matthew
;; Symbol Any String -> Void
(define (check-scene tag i rank)
(if (image? i)
(unless (and (= 0 (pinhole-x i)) (= 0 (pinhole-y i)))
(unless (scene? i)
(error tag "scene expected, given image whose pinhole is at (~s,~s) instead of (0,0)"
(pinhole-x i) (pinhole-y i)))
(check-arg tag #f "image" rank i)))
(define (scene? i) (and (image? i) (= 0 (pinhole-x i)) (= 0 (pinhole-y i))))
(define (scene? i) (and (= 0 (pinhole-x i)) (= 0 (pinhole-y i))))
;; Symbol Any String -> Void
(define (check-color tag width rank)
@ -785,9 +769,15 @@ Matthew
;; f : [World -> Image]
(define-callback redraw "redraw function" (f) ()
(with-handlers ([exn:break? break-handler][exn? exn-handler])
(define img (f the-world))
(check-result 'on-redraw (lambda (x) (image? x)) "image" img)
(update-frame img)))
(define result (f the-world))
(define fname (object-name f))
(define tname (if fname fname 'your-redraw-function))
(if (image? result)
(check-result tname scene? "scene" result
(format "image with pinhole at (~s,~s)"
(pinhole-x result) (pinhole-y result)))
(check-result tname (lambda (x) (image? x)) "scene" result))
(update-frame result)))
;; f : [World KeyEvent -> World]
;; esp : EventSpace