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render-o fixup for htdp/image

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svn: r17505
This commit is contained in:
Robby Findler 2010-01-06 20:43:37 +00:00
parent 68efb4008a
commit cabdfc25f2
1 changed files with 8 additions and 6 deletions
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14
collects/teachpack/htdp/scribblings/image.scrbl
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@ -139,13 +139,15 @@ find out where the pinhole is and place it where convenient.
Images can be composed, and images can be found within compositions. Images can be composed, and images can be found within compositions.
@defproc[(add-line [i image?] @defproc[(add-line [i image?]
[x number?] [x1 number?]
[y number?] [y1 number?]
[z number?] [x2 number?]
[u number?] [y2 number?]
[c (unsyntax @tech{Color})]) image?]{ [c (unsyntax @tech{Color})]) image?]{
Creates an image by adding a line (colored @scheme[c]) from @scheme[(x,y)] Creates an image by adding a line (colored @scheme[c]) from
to @scheme[(z,u)] to image @scheme[i].} (@scheme[x1],@scheme[y1]) to
(@scheme[x2],@scheme[y2])
to image @scheme[i].}
@defproc[(overlay [img image?] [img2 image?] [img* image?] ...) image?]{ @defproc[(overlay [img image?] [img2 image?] [img* image?] ...) image?]{
Creates an image by overlaying all images on their pinholes. Creates an image by overlaying all images on their pinholes.