Date   : Tue, 07 Jul 1998 20:43:48 +0100
From   : Richard Harker <rich@...>
Subject: Re: Circle routines in Basic

In message <158B22932A7BD111925B00805F8552E53A29FE@...>
          HANSELL Mike <hanselm@...> wrote:

> Hi,
> 
> As a Beeb years years ago I recall that BBC Basic doesn't have a circle
> function. I also recall that there were several techniques developed to
> produce them. I'd be very appreciative if anybody could supply the basic
> source code to any of them? 
> 
> Best regards,
> 
> Mike Hansell
> 
> hanselm@...

Hi,

Here's a routine to draw a few circles that I copied from one of my programs.
Hope it helps.

 10 a=1
 20 Y=1000
 30 MODE2
 40 Z=820
 50 REPEAT
 60  GCOL0,a
 70  MOVE 640,512
 80  FOR I=0 TO 2.1*PI STEP .1
 90   MOVE 640,512
100   X=640+Z*SIN(I)
110   Y=512+Z*COS(I)
120   PLOT 85,X,Y
130  NEXT
140  a=a MOD7+1
150  Z=Z-10
160 UNTILZ=0

Cheers, Rich
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