[Sidefx-houdini-list] Trail pop particles

Olivier Jeannel facialdeluxe at gmail.com
Wed Aug 3 12:05:25 EDT 2016


Trying to build a "clean" trail, I'm doing an
Attribute Create name "x" value @id
TrailSop in "preserve original" mode
AddSop "by attribute" attribute name "x"

But still, as soon a particle is delete, the remaining trailed particles
are doing a "mess" connecting .

On Wed, Aug 3, 2016 at 5:47 PM, Olivier Jeannel <facialdeluxe at gmail.com>
wrote:

> you're right the particles that are killed have their id disapeared (from
> the Geometry Spreadsheet), and are not replaced with a particle with the
> same id number.
> My bad ;)
>
>
>
> On Wed, Aug 3, 2016 at 5:42 PM, François Duchesneau <sidefx at trinix.ca>
> wrote:
>
>> Hi Olivier,
>>
>> Are you sure the id is changing? It's not supposed to. The point number
>> will change on the other hand but that's normal.
>>
>> Francois
>>
>>
>> On 08/03/2016 11:39 AM, Olivier Jeannel wrote:
>>
>>> Hi guys,
>>> I'm emitting a massive amount of particles with a Dopnet / Pop vop.
>>> The particles are birthing, have a life of 3seconds (with some variance)
>>> and then are killed by the pop.
>>>
>>> All went well until I wanted to trail them.
>>>
>>> As the particles are diying, their id is changing creating a "decay" in
>>> the
>>> trail and everything looks like a mess.
>>>
>>> A part from having forever living particles that would be deleted after
>>> the
>>> simulation Dopnet and after the Trailsop (which would be a bit heavy)
>>>
>>> I can't think of a method that would stick an attribute to a particle at
>>> birth and wouldn't change.
>>>
>>> Any idea to properly trail ?
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>>>
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>
>



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