Re: random points near central point

From	Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups	comp.lang.c, comp.programming
Subject	Re: random points near central point
Followup-To	comp.programming
Date	2023-07-23 14:53 +0100
Organization	A noiseless patient Spider
Message-ID	<87fs5en385.fsf@bsb.me.uk> (permalink)
References	(4 earlier) <2c181aeb-49e4-45b8-8be1-fc1189878e3en@googlegroups.com> <u9db6n$359g5$1@dont-email.me> <0c4b6149-511e-432c-a5b7-c7c88a865006n@googlegroups.com> <70c10615-2473-4f66-ab1c-c632aa33fa5cn@googlegroups.com> <f95fe6e8-b77b-42ba-a3d9-78057e1101c0n@googlegroups.com>

Cross-posted to 2 groups.

Followups directed to: comp.programming

Show all headers | View raw

fir <profesor.fir@gmail.com> 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.

Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

random points near central point fir <profesor.fir@gmail.com> - 2023-07-18 23:38 -0700
  Re: random points near central point Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-07-19 01:49 -0700
    Re: random points near central point fir <profesor.fir@gmail.com> - 2023-07-19 04:20 -0700
  Re: random points near central point Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-07-19 01:59 -0700
  Re: random points near central point Kaz Kylheku <864-117-4973@kylheku.com> - 2023-07-19 16:50 +0000
  Re: random points near central point Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-07-19 20:23 +0100
    Re: random points near central point fir <profesor.fir@gmail.com> - 2023-07-20 09:31 -0700
      Re: random points near central point Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-07-20 20:42 +0100
        Re: random points near central point fir <profesor.fir@gmail.com> - 2023-07-20 12:56 -0700
          Re: random points near central point Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-07-20 20:59 +0100
          Re: random points near central point David Brown <david.brown@hesbynett.no> - 2023-07-21 09:13 +0200
            Re: random points near central point fir <profesor.fir@gmail.com> - 2023-07-21 05:55 -0700
              Re: random points near central point Ed Prochak <edprochak@gmail.com> - 2023-07-22 12:24 -0700
                Re: random points near central point fir <profesor.fir@gmail.com> - 2023-07-23 04:04 -0700
                Re: random points near central point Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-07-23 14:53 +0100
                Re: random points near central point fir <profesor.fir@gmail.com> - 2023-07-23 07:03 -0700
                Re: random points near central point "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-07-23 12:30 -0700
                Re: random points near central point Ed Prochak <edprochak@gmail.com> - 2023-07-30 21:48 -0700
                Re: random points near central point fir <profesor.fir@gmail.com> - 2023-08-03 10:00 -0700
        Re: random points near central point fir <profesor.fir@gmail.com> - 2023-07-20 13:20 -0700
      Re: random points near central point "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-07-20 12:57 -0700
        Re: random points near central point fir <profesor.fir@gmail.com> - 2023-07-20 13:18 -0700
          Re: random points near central point "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-07-23 12:28 -0700
  Re: random points near central point "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-07-20 12:56 -0700
  Re: random points near central point Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-03 19:17 +0200
    Re: random points near central point fir <profesor.fir@gmail.com> - 2023-08-03 10:55 -0700
      Re: random points near central point fir <profesor.fir@gmail.com> - 2023-08-03 11:04 -0700
      Re: random points near central point Bonita Montero <Bonita.Montero@gmail.com> - 2023-08-04 17:22 +0200
        Re: random points near central point fir <profesor.fir@gmail.com> - 2023-08-04 10:06 -0700

csiph-web