Automated Drawing

[Richmond]

On 10/05/15 01:22, Jim Hurley wrote:
>> Message: 8
>> Date: Sat, 09 May 2015 19:59:15 +0300
>> From: Richmond <richmondmathewson at gmail.com>
>> To: How to use LiveCode <use-livecode at lists.runrev.com>
>> Subject: Re: Automated Drawing
>> Message-ID: <554E3CE3.2030507 at 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
>
>
>

Yesd, it is, and it is my bl**dy silly fault that I fired off that 
e-mail before I did a bit more digging and sorted the whole thing out.

Richmond.