ANN Nine Ball with Spin (English)

[Jim Hurley]

>
>Message: 8
>Date: Mon, 04 Apr 2005 14:18:58 -0700
>From: Quentin Long <cubist at aol.com>
>Subject: Re: ANN Nine Ball with Spin (English)
>To: use-revolution at lists.runrev.com
>Message-ID: <4251AF42.3000804 at aol.com>
>Content-Type: text/plain; charset=us-ascii; format=flowed
>
>sez jhurley at infostations.com
>>  But I am off to something else right now--using Run Rev to create a
>>  simulation contrasting global warming on Venus, Earth and Mars.
>>  (Right now I need a tool for making circular arcs--like the Run Rev
>>  pie shaped circular segments, but without the radial lines. May be a
>>  job for Turtle Graphics.)
>     Graphics can be filled or not-filled, and you can also adjust the
>thickness/color/etc of the line. THus, why not try a *non-filled* arc?
>     Hope this helps...


Quentin,

Are you referring to the Run Rev arc using the circle graphic with 
given arc length?

The problem I have with this is that I need an arc without radial 
lines. But fortunately it is easy to build one in Run Rev.

Put the following into a button script:

on mouseUp
   arc  the loc of me,100,0,180+90,"myArc"
end mouseUp

on arc startPt, r, tStartAngle,tEndAngle,tName
   put item 1 of startPt into x0
   put item 2 of startPt into y0
   repeat with a = tStartAngle to tEndAngle
     put x0 + r*cos(a/180*pi) into x
     put y0 + r* sin(a/180*pi) into y
     put round(x),round(y) & cr after results
   end repeat
   set the points of graphic tName to results
end arc

And you will get a three-quarters circle, with radius 100, drawn 
around the button. (You will need a line graphic with the name 
"myArc." )

Following up on the "Poll the sum(7,9)" thread, I'm one of those who 
can't add, so I always let Run Rev do it for me, hence the 180 +90.

Jim