P.S.
I should have said that "startTurtle" (or simply "st") is the command that
initiates the turtle.
Jim
> Message: 8
> Date: Sat, 09 May 2015 19:59:15 +0300
> From: Richmond <richmondmathew...@gmail.com>
> To: How to use LiveCode <use-livecode@lists.runrev.com>
> Subject: Re: Automated Drawing
> Message-ID: <554e3ce3.2030...@gmail.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> On 09/05/15 16:52, Richmond wrote:
>> On 21/03/15 18:17, Jim Hurley wrote:
>>> Richmond,
>>>
>>> I wrote this Turtle Graphics library in the dark ages of RR, before
>>> ?sum? became a reserved word.
>>>
>>> So, comment out the ?sum? handler in the stack script.
>>>
>>> Jim
>>>
>>
>> Having copied your stack script across into my stack I am stuck with 2
>> problems:
>>
>> 1. How to make the line to show as 'pd' [penDown] doesn't seem to work.
>>
>> 2. How to exchange your graphic "turtleGraphic" for an img.
>>
>> In all other respects the thing is super!
>>
>> Richmond.
>
> Actually my "big" problem at the moment is, with this script:
>
> on right dangl
> rt dangl
> end right
>
> on rt dangl
> subtract dangl from angl
> drawTurtle
> end rt
>
> on drawTurtle
> myWait waitTime
> if noDraw then exit drawturtle
> put 5 into distance
> put round(x0 +x)&comma& round(-y+y0) & return into gPoints
> put distance * cos(radPerDeg * angl) into dx
> put dx into fld "dx"
> put distance * sin(radPerDeg * angl) into dy
> put dy into fld "dy"
> put round(x+x0+dx)&comma&round(-y+y0-dy) after gPoints
> set points of graphic "turtleGraphic" to gPoints
> set the angle of img "turt" to ((the angle of img "turt") - angl)
> end drawTurtle
>
> with the graphic "turtleGraphic" and the img "turt" initially pointing
> in the same direction,
> why they don't go on pointing in the same direction everytime I send
> "right 45" via the message box?
>
> Richmond.
> *********************************************
Hi Richmond,
I suspect the problem your are having is that the turtle has to initiated
before he will respond.
Try this script in a button as see if it draw a line, shows the arrow pointing
in the direction of the next move and then repeats.
The result should be a square 100 units on a side.
on mouseUp
startTurtle
showturtle
repeat 4 times
fd 100
lt 90
wait 50 ticks
end repeat
choose the browse tool
end mouseUp
Jim
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