Re: pre-alpha vector field DLA, with point-and-click attractors...

From	"Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid>
Newsgroups	comp.lang.javascript
Subject	Re: pre-alpha vector field DLA, with point-and-click attractors...
Date	2017-10-04 20:48 -0700
Organization	n/a
Message-ID	<or4a2m$kn$1@dont-email.me> (permalink)
References	<oqa2aa$le4$1@dont-email.me> <oqcipr$avm$1@shakotay.alphanet.ch> <oqh155$so9$1@dont-email.me> <1d1370dc-ca4c-4d96-839a-9c306b740c05@googlegroups.com>

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On 9/30/2017 8:41 AM, Michael Haufe (TNO) wrote:
> Chris M. Thomasson wrote:
>>
>> Thank you for giving it a go Une! I can make it better wrt a different
>> way of programming. This tends to overwhelm the cpu with computation and
>> the use of the garbage collector. Wrt GC, the JavaScript engines tend to
>> create new object for every array passed to a function. For instance, I
>> can pass two 3d points and a radius like this wrt the style of my
>> current code:
>>
>> foo([-1, 0, 0], [1, 0, 0], 1);
>>
>> Each array index is mapped to (a[0] = x), (a[1] = y) and (a[2] = z).
>>
>> This will create two damn arrays for each call! And those go into the
>> GC. Read here for some further information:
>>
>> https://groups.google.com/d/topic/comp.lang.javascript/dgakiMzhgv0/discussion
>>
>> Also, it can burn CPU because DLA points never die off! I need to allow
>> them to die off and leave the per-field-line segment vector field
>> summation. The more points, the slower it goes. I wonder if changing the
>> color of the field lines to grey, or some color that designates turning
>> "brown/yellow", or the interpolation of the death cycle wrt specific
>> colors. The act of death would take pressure off the core field logic
>> wrt reducing iterations.
> 
> 
> I threw a quick codepen together of your code and did a very high level translation to ES6+ with minimal impact:
> 
> <https://codepen.io/mlhaufe/project/editor/XNGeEv#0>
> 
> I'm hoping this could aid in the discussion and evolution.
> 
> I didn't see why you needed the requestAnimation polyfill. I think there is sufficient support for it now:
> 
> <http://caniuse.com/#feat=requestanimationframe>
> 

Your codepen works like a charm Michael! Thank you so much for your time 
and energy wrt helping my code be more modern. Seriously, I am a little 
stuck in the past wrt JavaScript, the polyfill for anime loop. Ack.

Well, I did go a step further and implemented my experimental vector 
field in a GLSL shader:

https://www.shadertoy.com/view/XljcRR

Does this work for you?

Thanks again man. :^)

Thread

pre-alpha vector field DLA, with point-and-click attractors... "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2017-09-24 21:56 -0700
  Re: pre-alpha vector field DLA, with point-and-click attractors... Julio Di Egidio <julio@diegidio.name> - 2017-09-24 22:36 -0700
    Re: pre-alpha vector field DLA, with point-and-click attractors... "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2017-09-24 22:44 -0700
      Re: pre-alpha vector field DLA, with point-and-click attractors... Julio Di Egidio <julio@diegidio.name> - 2017-09-24 22:54 -0700
        Re: pre-alpha vector field DLA, with point-and-click attractors... "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2017-09-25 12:31 -0700
          Re: pre-alpha vector field DLA, with point-and-click attractors... Julio Di Egidio <julio@diegidio.name> - 2017-09-26 09:05 -0700
            Re: pre-alpha vector field DLA, with point-and-click attractors... "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2017-09-28 21:24 -0700
              Re: pre-alpha vector field DLA, with point-and-click attractors... Julio Di Egidio <julio@diegidio.name> - 2017-09-29 06:47 -0700
        Re: pre-alpha vector field DLA, with point-and-click attractors... "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2017-09-25 12:39 -0700
  Re: pre-alpha vector field DLA, with point-and-click attractors... "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-09-25 22:00 +0200
    Re: pre-alpha vector field DLA, with point-and-click attractors... "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2017-09-25 13:25 -0700
      Re: pre-alpha vector field DLA, with point-and-click attractors... "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-09-25 22:36 +0200
        Re: pre-alpha vector field DLA, with point-and-click attractors... "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2017-09-27 13:38 -0700
  Re: pre-alpha vector field DLA, with point-and-click attractors... Une Bévue <unbewusst.sein@fai.invalid> - 2017-09-26 05:50 +0200
    Re: pre-alpha vector field DLA, with point-and-click attractors... "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2017-09-27 13:19 -0700
      Re: pre-alpha vector field DLA, with point-and-click attractors... "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2017-09-30 08:41 -0700
        Re: pre-alpha vector field DLA, with point-and-click attractors... "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2017-10-04 20:48 -0700
          Re: pre-alpha vector field DLA, with point-and-click attractors... "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2017-10-05 08:25 -0700

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