per particle dynamics

# 1 05-11-2003 , 09:55 PM

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Join Date: Feb 2003

Location: Los Angeles

Posts: 695

I'm trying to set up a partcile system for a puffy dandelion being blown in the wind. Mostly I've got it working except all of the particles fly off simultaneously. What I'd like to do is have them fly off one by one. I tried to write an expression to that effect, but I can't figure out the command to say "make this particle dynamic". Instead it makes all of them dynamic at once.

This is what I've got.

if (particleShape2.particleId <= (frame/2))
{
particleShape2.dynamicsWeight = 0;
}
else
{
particleShape2.dynamicsWeight = 1;
}

I also tried making a new expression ("dynPP"), but I couldn't figure out how to assign it to individual particles.

Any thoughts?

user added image

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# 2 06-11-2003 , 04:48 AM

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Join Date: Sep 2002

Location: Minnesota, USA

Posts: 3,709

Well, Danny might have a better mel-way of doing that, but:

Question, is yor system of "seeds" resting on a sphere or other type of solid geometry?

If so, you could try using per-particle GOAL weights by animating a goal-weight ramp on the sphere, thus the "seeds" would blow away only when a pre-determined goal-weight/ramp value reaches them.

Lemme know if that made no sense user added image

Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
izzylong.com

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# 3 06-11-2003 , 05:00 AM

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Location: Los Angeles

Posts: 695

Itr made some sense in theory, but I have no idea how to set something like that up. Never used goals. Wouldn't the particle then go to the goal? I don't want that. I want each particle to fly off in it's own direction. Could I do that with your idea?

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# 4 06-11-2003 , 03:37 PM

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Join Date: Sep 2002

Location: Minnesota, USA

Posts: 3,709

Sure!

You would just set the initial start of the weight-map total value to be the value at which the seeds are attracted (100% goal).

Then just animate that map to vary away from that value so the seeds fall off in a controllable wave or random depending on your map user added image

Understand?

If not, lemme know user added image

Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
izzylong.com

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