Path: csiph.com!1.us.feeder.erje.net!3.eu.feeder.erje.net!feeder.erje.net!eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Ben Bacarisse Newsgroups: comp.lang.c,comp.programming Subject: Re: random points near central point Followup-To: comp.programming Date: Sun, 23 Jul 2023 14:53:46 +0100 Organization: A noiseless patient Spider Lines: 46 Message-ID: <87fs5en385.fsf@bsb.me.uk> References: <87tttzr9h0.fsf@bsb.me.uk> <874jlyqsi1.fsf@bsb.me.uk> <2c181aeb-49e4-45b8-8be1-fc1189878e3en@googlegroups.com> <0c4b6149-511e-432c-a5b7-c7c88a865006n@googlegroups.com> <70c10615-2473-4f66-ab1c-c632aa33fa5cn@googlegroups.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: dont-email.me; posting-host="46eee68be2a45be2a6fdd3ba499a7b10"; logging-data="295049"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19XvSd1tGP7oHY4K1V8Vo2ovYDsDOMYEjk=" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) Cancel-Lock: sha1:OWg5nFpO7W6wL/6qkKZORI/9pPk= sha1:iHGJaM25uf4CnNcIB/1Ecsf/eG8= X-BSB-Auth: 1.2e4158c84944d26a49aa.20230723145346BST.87fs5en385.fsf@bsb.me.uk Xref: csiph.com comp.lang.c:171159 comp.programming:16562 fir writes: > sobota, 22 lipca 2023 o 21:24:23 UTC+2 Ed Prochak napisał(a): >> On Friday, July 21, 2023 at 8:55:36 AM UTC-4, fir wrote: >> [] >> > no i dont want to put an asteroid in 'cylinder' from radius r1 to r2 >> > i want to set most of them in circle r1 and rest in cylinder from r1 to r2 >> > such way it would look naturally such as a n group of astronomical things >> > or pieces of things when you shatter them on the floor - most density in >> > the centre till r1 less near r2 and none outside r2 >> > >> I suggest you define your expected distribution first. >> You might begin by defining the distribution you really want. >> case 1: Is it constant density from 0 to r1 and then linear decline of density from r` to r2? >> case 2: is is a natural distribution of "astronomical things"? >> (clearly not like case 1, consider the solar system, including the asteroid belt) >> case 3: is it a random scattering as "when you shatter them on the floor" >> (clearly not like case 1 or 2. This is a gaussian distribution.) >> case 4: SOMETHING ELSE??? >> >> State your desire clearly and we may be able to help you. Without a clear goal, >> you'll be debugging potential solutions forever. >> >> Ed > > i dont care to much exactly i need to set a pack of 200 asteroids > around some point to look good (but this should be not to much density > in centre, ilke 10 asteroid cover the same piece of screen, thety may > cover partially, but not like stack in 10 in one place)...also i want > to use this function to set other things like in random group (but not > like brush in pain, its more like more density in centre (where centre > is not point but circle) and gradually less from r1 to r2 A bit like these: http://bsb.me.uk/tmp/r1.png http://bsb.me.uk/tmp/r2.png > i think its not hard to understand what i want It's hard to understand what you write. I am sure what you want is quite simple. This is not about C so I'm going to crosspost to comp.programming and set followups. I won't post about it here again. -- Ben.