Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: Richard Ashbery <basura@invalid.addr.uk>
Newsgroups: comp.sys.acorn.programmer
Subject: Re: Specific numbers but in a random sequence
Date: Sat, 22 Jun 2019 12:03:18 +0100
Organization: None
Lines: 32
Message-ID: <57c815b263basura@invalid.addr.uk>
References: <57c7c5d6c0basura@invalid.addr.uk> <qeji40$7ca$1@dont-email.me> <qel12p$ibq$1@dont-email.me>
X-Trace: individual.net Dae0tiX242THdfNZUTKDOwf5YSMXWAlGx5ge7hXG4VVfBTDExo
X-Orig-Path: uwclub.net!richard.ashbery
Cancel-Lock: sha1:sa6/cwsdmHUKIu1nRfWcGdm/96o=
User-Agent: Pluto/3.16 (RISC OS/5.25) NewsHound/v1.52-32
Xref: csiph.com comp.sys.acorn.programmer:5773

In article <qel12p$ibq$1@dont-email.me>, druck <news@druck.org.uk>
wrote:
> On 21/06/2019 22:27, Gavin Crawford wrote:
> > Richard Ashbery <basura@invalid.addr.uk> Wrote in message:
> >> The following variables can be used to calculate precise
> >> anglesthrough which an object can be rotated. The first rotates
> >> objectthrough 360/3 = 120 degrees, the next one 360/4 = 90
> >> degrees and soon. Each calculation creates an integer with no
> >> decimal places.3,4,5,6,8,9,10,12,15,18,20,24,30,36,45,60,90,120I
> >> would like to be able to use these variables in a random
> >> sequence.Has anyone a BASIC routine that could do this please?

> Any reason 2 and 180 aren't used?

Good question: 2 objects looked a little odd in the animation so I
went for 3 as a minimum.

> > Why not put them into an array and use a random number to choose
> >   the array index.

> Yes, and make sure you seed the random number generator, or it may
> always go through the same pseudo random sequence each time its run.

> IIRC to seed do RND(-TIME) before any other call to RND.

Thanks guys for your help as always. The array method should work.
RND(-TIME) is a great idea to get non-repeating random numbers.

Many thanks

Richard