Sorry, it seems a easy thing to do, but I just can't figure it out…, hope someone could help.

I try to make a RBD glue object to give birth exactly one (or a specific amount of) particle whenever any chunks inside the glue object collide with something. I have already extracted all the impact data I need to POP and give birth particles from it, what I can't do is control the no. of particles emit from each source (i.e. impact position). *if* there is only ONE source, I could keyframe the activation field, but since the chunks collide at different frame, how could I control all the potential particles sources so that they will only emit one particle?

Any help would be appreciated.

Thanks

You say you have the impact data, did you try an expression in the activation field. If collided 1 else 0, something along those lines…

Hi Michael, thanks for the suggestion, it works I am so dumb…

It would be handy if we can set the no. directly though.

Thanks again.