RE: Heading issue

["Boyd, Ronald" <Ronald.Boyd@xxxxxxxxxxxxxxx>]

OH soo close thank you!
 
Ronald Boyd
GT Coordinator/Technology Integration Specialist
Rosemount Elementary
651-423-7690
ronald.boyd@xxxxxxxxxxxxxxx

________________________________

From: mwforum-admin@xxxxxxxxxxxxxxxxxxxxxxxxxxxx on behalf of Daniel Ajoy
Sent: Sun 7/29/2007 9:44 PM
To: mwforum@xxxxxxxxxxxxxxxxxxxxxxxxxxxx
Subject: Re: Heading issue



On 29 Jul 2007 at 14:45, Boyd, Ronald wrote:

> This is a project from one of my students from this past
> week. His page polygon-or-non was a bit of a stretch for
> the intention of the project and so went unfinished at the
> end of the week show. Our problem was in trying to write a
> procedure that would sense the heading of the turtle
> respond correclty to the users choice of polygon or non
> polygon. Luckily he choose to draw the non-polygon shapes
> next to each other which should have made it easier. Our
> first attempt is in the turtles note section. We tried
> having two buttons that would elicit either a correct or a
> incorrect response based on sensing if the turtles heading
> fell within a parameter using the ifelse.

the code was:

to non-polygon 
jag,
ifelse {heading > 284 and heading < 85} [correct][wrong]
end

to polygonshape
jag,
ifelse {heading < 285 and heading > 85} [correct][wrong]
end

to correct
announce [correct]
end

to wrong
announce [Try again]
end


but "and" is like any other procedure in MicroWorlds
it receives two inputs, that should be truth values.

The right syntax is:

ifelse and (heading > 284) (heading < 85) [correct][wrong]

or simply

ifelse and heading > 284 heading < 85 [correct][wrong]



I've never seen curly brackets used in MicroWorlds:


Daniel
OpenWorld Learning

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