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Re: random points near central point

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Ben Bacarisse <ben.usenet@bsb.me.uk> writes:

> 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.

You posted again in comp.lang.c and not here.   Oh well...

In case you choose to follow the proper etiquette, here's three other
images that maybe match waht you want.  It's really hary to tell.

http://bsb.me.uk/tmp/r3.png
http://bsb.me.uk/tmp/r4.png
http://bsb.me.uk/tmp/r5.png

-- 
Ben.

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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 Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-07-23 15:25 +0100
    Re: random points near central point Richard Harnden <richard.nospam@gmail.com> - 2023-07-23 17:46 +0100
      Re: random points near central point Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-07-23 21:04 +0100
  Re: random points near central point Y <yyyyyyyyyayayayyyyyaaaaaa@hotmail.com> - 2023-07-23 09:04 -0700

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