[x3d-public] Procedural collectors, Chaotic collectors

[John Carlson]

 I am working on collectors and emitters for JSON.  How to import/collect
JSON into a model, and export/emit other encodings.

I am also working on fluid X3D encodings,  but that is very preliminary.

John

On Sat, Mar 12, 2022 at 4:20 PM John Carlson <yottzumm at gmail.com> wrote:

> Do we have a saltation emitter yet?  Very important!
>
> https://en.m.wikipedia.org/wiki/Saltation_(geology)
>
> Or is this natural from collidables and Wind particles?
>
> What’s the equivalent collector?
>
> On Sat, Mar 12, 2022 at 4:16 PM John Carlson <yottzumm at gmail.com> wrote:
>
>> I’m thinking I’m the guy who collects collectors, not collections.
>>
>> On Sat, Mar 12, 2022 at 4:12 PM John Carlson <yottzumm at gmail.com> wrote:
>>
>>> I would wiggle out of a straight lerp though, for realistic purposes.
>>>
>>> John
>>>
>>> On Sat, Mar 12, 2022 at 3:28 PM GPU Group <gpugroup at gmail.com> wrote:
>>>
>>>> One idea is to add collectors to the physics based emitter scenarios.
>>>> The physics changes the particle's position based on physics formulas,
>>>> on each iteration. A collector could have 'influence' on the position,
>>>> based on
>>>> a) time since emitting, with the greater time, the more influence
>>>> position = lerp(delta_time, physics_position, collector_position)
>>>> so that as time goes on, the collector position dominates until the
>>>> particle is at the collector
>>>> b) nearness to a collector - with multiple collectors in the scene, it
>>>> would be nice if a particle would go to the closest collector.
>>>> collector = closest(collector_list,particle_position)
>>>> position = lerp(delta_time, physics_position, collector_position)
>>>> Doug
>>>>
>>>> On Sat, Mar 12, 2022 at 2:12 PM John Carlson <yottzumm at gmail.com>
>>>> wrote:
>>>> >
>>>> > For a concrete example, one might consider a procedurally generated
>>>> tree (L-system) affected by either a liquid or gas emitter, then try to
>>>> figure out what stress will break a tree limb or root.
>>>> >
>>>> > On Sat, Mar 12, 2022 at 3:05 PM John Carlson <yottzumm at gmail.com>
>>>> wrote:
>>>> >>
>>>> >> To continue the discussion of collectors, I will introduce 2 newer
>>>> terms, “procedural collector” and “chaotic collector.”   These might be
>>>> considered the opposite of procedural generation and then the variety of
>>>> X3D particle system emitters matched with new collector nodes.
>>>> >>
>>>> >> So there are “garbage emitters/generators” and “garbage collectors,”
>>>> of course.   First we need better modeling of the problem space for
>>>> collectors.
>>>> >>
>>>> >> X3D Proto Design welcome!
>>>> >>
>>>> >> Fluid system X3D proto design welcome!   Fluid emitters and fluid
>>>> collectors welcome!
>>>> >
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