[Sidefx-houdini-list] pop previous velocity
luca at cinesite.co.uk
Tue Apr 17 05:43:55 EDT 2007
Ok, I found a decent solution by storing the v to n, use the trail (1
frame) and compute velocity, copy v to oldVel, copy n back to v. This
way I get correct oldVel except for the last frame before the particle
dies, but I can live with that.
Now I'm getting stuck with the particle Age (life): I would also like
to store the previous frame's particle Age. :)
I guess this would be an interested topic on how to store simulation
variables at a different time from current time.
Luca Zappala wrote:
> Hello there,
> I'm trying to cache the particle oldVel (velocity at the previous frame).
> I read the upvector node should create a previousVelocity local
> variable (PV) but this doesn't seem to be working properly, in fact PV
> is the same as V.
> Do you have any other idea on how to store the oldVel as well?
> thanks a lot
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