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run-simulation -> animate

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svn: r15995
This commit is contained in:
Matthias Felleisen 2009-09-14 00:59:45 +00:00
parent 03134e9107
commit 73e9e77830
1 changed files with 9 additions and 3 deletions
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12
collects/teachpack/2htdp/scribblings/universe.scrbl
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@ -89,7 +89,7 @@ The simplest kind of animated @tech{world} program is a time-based
supply a function that creates a scene for each natural number. By handing supply a function that creates a scene for each natural number. By handing
this function to the teachpack displays the simulation. this function to the teachpack displays the simulation.
@defproc[(run-simulation [create-image (-> natural-number/c scene)]) @defproc[(animate [create-image (-> natural-number/c scene)])
true]{ true]{
opens a canvas and starts a clock that tick 28 times per second. Every opens a canvas and starts a clock that tick 28 times per second. Every
@ -97,7 +97,7 @@ The simplest kind of animated @tech{world} program is a time-based
number of ticks passed since this function call. The results of these number of ticks passed since this function call. The results of these
function calls are displayed in the canvas. The simulation runs until you function calls are displayed in the canvas. The simulation runs until you
click the @tt{Stop} button in DrScheme or close the window. At that click the @tt{Stop} button in DrScheme or close the window. At that
point, @scheme[run-simulation] returns the number of ticks that have point, @scheme[animate] returns the number of ticks that have
passed. passed.
} }
@ -110,9 +110,15 @@ Example:
(overlay (circle 10 'solid 'green) (overlay (circle 10 'solid 'green)
(rectangle 40 4 'solid 'green))) (rectangle 40 4 'solid 'green)))
(run-simulation create-UFO-scene) (animate create-UFO-scene)
] ]
@defproc[(run-simulation [create-image (-> natural-number/c scene)])
true]{
@scheme[animate] was originally called @scheme[run-simulation], and this
binding is retained for backwards compatibility}
@;----------------------------------------------------------------------------- @;-----------------------------------------------------------------------------
@section[#:tag "interactive"]{Interactions} @section[#:tag "interactive"]{Interactions}