CGTalk - Initial State and emissin speed

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beatmanb

11-08-2005, 10:09 AM

Hi,

I try to make a particle field and influence that particles with a weak turbulence, so that I get something like for example some small bacteria that are moving very slowly but jittering a little bit accidentally...

So my first step was to create an emitter (Volume-cube) and emit some particles. When they are in the positions I want I did an Initial State for all Dynamics to force them starting from that position.Works good.
Now, I set the emission rate of the emitter to 0 because I don´t need any new particles.
And now my problem:
The particles are still moving in their directions they were emitted to when I press play,but I want them to stand on their places and only react to a turbulence field.

I don´t know what to do now, I tried to lower the conserve, but that also influences their reaction to the turbulence, how can I stop the particles movement, the best would be if they only move very,very slow and jitter around a bit...

thanks for help,beat

alexx

11-08-2005, 10:17 AM

best idea to do that is emit the particles with 0 speed.

if they have speed: select them all in component mode, go to the component editor, zero the 3 velocity values and set the initial state.

btw: the jittering will look a bit strange in the first frames.. so it would be better having a runup to frame 0 from negative frames.
set the "start frame" in the particles to e.g. -100
run from frame -100 with the particle system having the turbulence attached already.
when you are at frame 1 stop the simulation and set the initial state.
when you play from frame 1 now the movement is continous and does not jump when the field grabs the particles in the beginning.

cheers

alexx

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