[Sidefx-houdini-list] Particles birthing from a deleted source

François Duchesneau sidefx at trinix.ca
Mon Dec 1 23:11:27 EST 2008


Is there a reason why particles number to be born are accumulating over 
time before a source geometry exists. For example, I create a grid in 
sop followed by a Delete Sop with an expression like $FF<100. If I use 
that as the source of a particles simulation, at frame 101, there will 
be a lot more particles born then the following frames.

What I do to avoid that is create an area attribute, promote that to 
detail and drive the constant birth rate with the "detail" expression to 
get the amount that I multiplier by an arbitrary number. Particles has 
been there for such a long time, I'm sure there's a reason why it's like 
that or maybe I'm doing something wrong.



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