Mathieu,
Is there a possibility that the instanced group has a name extremely
close (if not the same) as the PType? This is how I could sort
something like that, as in XSI 4.2 I could not find a way to query the
instanced group from the PType (sorry if I missed it...)
I don't "manually" set the group of particle instances. Instead, I use
a script that allows me to pick the object(s) I want to particle
instantiate, then it will create the group and the PType with a near
same name, and then perform the actual group instantiation.
You could possibly write a tool that when a group is used as instance
group in a PType, either the PType or the group is renamed to make
sure the two conform to a traceable label.
When you want to transfer information, retrieve the group by their
name, based on the PType name, and then visit the group members.
Note I have not tried to do what you're after, these are just suggestions.
Cheers
Bernard
On 4/14/06, Mathieu Leclaire <mleclair(at)hybride.com> wrote:
>
>
>
> First let me give you the context of what I'm doing: I'm creating a special
> kind of collision system for particles. I'm creating a particle cloud to
> which I attached a scripted event evaluated on every frame that calls a
> custom command to verify which particles collide. If a certain particle(s)
> does collide, the custom command writes information to a second clouds'
> userDataBlob, and puts an ageLimit value to it's current age value to make
> that particle disappear. Then the second cloud has a custom operator that
> reads it's userDataBlob and if theirs information in it, it adds the new
> particle(s) and the clears the userDataBlob to await new information. So
> that's basically copying particles from one cloud to another depending on
> collision calculations.
>
>
>
> But here's my problem: I can copy the ptype from one cloud to the other
> while creating this second cloud before I do the simulation. But I use
> particle instancing and in my instance group there might be more then one
> object so how do I know for each particle, which object it's instantiating
> so I can copy that information through the userDataBlob and make sure that
> the new particle on the second cloud instantiates the right object?
>
>
>
>
>
> Mathieu Leclaire
>
> R&D Programmer
>
> Hybride Technologies
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