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From: Richard Ashbery <basura@invalid.addr.uk>
Newsgroups: comp.sys.acorn.programmer
Subject: Re: Rotating a Colour-Filled Square
Date: Wed, 13 Nov 2019 12:54:00 +0000 (GMT)
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In article <qqfdpr$n4t$1@solani.org>, Sebastian Barthel
<naitsabes@freenet.de> wrote:

>  MODE 1280,960,8

>  CLS ORIGIN 1024,1024 S=0.05

>  FOR R=0 TO 2*PI STEP S

>  POINT SIN(R)*300, COS(R)*300 DRAW
>  SIN(R+1.571)*300,COS(R+1.571)*300 DRAW
>  SIN(R+3.141)*300,COS(R+3.141)*300 DRAW
>  SIN(R+4.712)*300,COS(R+4.712)*300 DRAW SIN(R)*300, COS(R)*300

>  FILL 0,0

>  WAIT : CLS


>  NEXT


> If You want to speed up things, You should use an array with the
> precalculated SIN/COS values.

> The only real difference to Your lines is the single FILL command.

> The effect can't be seen if the MODE command isn't given.

Excellent - many thanks Sebastian

Richard