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world exports line+scene and add-line now

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svn: r7039
This commit is contained in:
Matthias Felleisen 2007-08-06 23:59:54 +00:00
parent ef0f4689b2
commit 140b1eb1fd
1 changed files with 9 additions and 8 deletions
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17
collects/htdp/world.ss
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@ -23,6 +23,7 @@ ones.)
Matthew
|#
;; Mon Aug 6 19:50:30 EDT 2007: exporting both add-line from image.ss and scene+line
;; Fri May 4 18:05:33 EDT 2007: define-run-time-path
;; 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
@ -73,15 +74,14 @@ Matthew
;; image manipulation functions:
;; =============================
(provide (all-from-except (lib "image.ss" "htdp") add-line))
(provide (all-from (lib "image.ss" "htdp")))
(provide
;; Scene is Image with pinhole in origin
nw:rectangle ;; Number Number Mode Color -> Image
place-image ;; Image Number Number Scene -> Scene
empty-scene ;; Number Number -> Scene
(rename add-line-to-scene add-line)
;; Scene Number Number Number Number Color -> Scene
scene+line ;; Scene Number Number Number Number Color -> Scene
;; cut all pieces that are outside the given rectangle
)
@ -169,12 +169,13 @@ Matthew
(rectangle width height 'outline 'black))
0 0))
(define (add-line-to-scene img x0 y0 x1 y1 c)
(define (scene+line img x0 y0 x1 y1 c)
;; img and c are checked via calls to add-line from image.ss
(check-arg 'add-line (number? x0) "number" "second" x0)
(check-arg 'add-line (number? y0) "number" "third" y0)
(check-arg 'add-line (number? x1) "number" "fourth" x1)
(check-arg 'add-line (number? y1) "number" "fifth" y1)
(check-arg 'scene+line (scene? img) "scene" "first" "plain image")
(check-arg 'scene+line (number? x0) "number" "second" x0)
(check-arg 'scene+line (number? y0) "number" "third" y0)
(check-arg 'scene+line (number? x1) "number" "fourth" x1)
(check-arg 'scene+line (number? y1) "number" "fifth" y1)
(let ([x0 (number->integer x0)]
[x1 (number->integer x1)]
[y0 (number->integer y0)]