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To: mwforum@xxxxxxxxxxxxxxxxxxxxxxxxxxxx, Andrea Duran <aduran@xxxxxxxxxxxxxxxxxxxxx>
Subject: Re: MIA, Ask an Expert: pacman
From: "Daniel Ajoy" <dajoy@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 29 Aug 2005 10:40:23 -0500

On 28 Aug 2005 at 23:03, Ask an Expert - Question wrote:

> This is an automatic message sent from the web form at:
> http://mia.openworldlearning.org/howdoi.htm
> from: Andrea Duran <aduran@xxxxxxxxxxxxxxxxxxxxx>
> date: Fri Aug 26 16:51:43 2005
> I'm attempting to make my own pacman game.  I figured the 
> only way I could program the turtle to eat the black lines 
> I drew was to use colorunder.  It works just fine but is 
> there a way I can program the game to know when there is no 
> more black on the screen and move on to the next level 
> (next page).

Hi Andrea,

This is the only way I managed to make it work.

You need to know were you put your cookies.

Once you press the place.cookies button you need to
use the Paint Can tool to "eat" them manually (filling
them with white) you can do that in any order. You can
also use your own packman procedures to eat them if
you want. But once their are all gone you will get 
the announcement.

The waituntil line will check continuously of all
the cookies have been eaten. The check.all.eaten
procedure outputs "some.still.there" if there is
at least one cookie left, otherwise it outputs 

The code is below.


to place.cookies
make "positions [[-60 -60] [-60 -20] [-60 20] [-60 60] [-20 -60] [-20 -20] 
[-20 20] [-20 
60] [20 -60] [20 -20] [20 20] [20 60] [60 -60] [60 -20] [60 20] [60 60]]

t1, setsh "cookie
dolist [cookie.pos :positions] [setpos :cookie.pos stamp]
setpos [-100 100] setsh "packman

tester.turtle, ht
waituntil ["none.left = check.all.eaten]

announce [next level]

to check.all.eaten
dolist [cookie.pos :positions] [
 setpos :cookie.pos
 if colorunder = 9 [op "some.still.there ]
op "none.left

OpenWorld Learning

Attachment: CheckCookies.mw2
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