[Sidefx-houdini-list] Unload and the Null operator

Ben Schrijvers ben.schrijvers at guerrilla-games.com
Mon Apr 6 12:00:52 EDT 2009

I geuss the Null Sop in unloaded by default and toggle theat Cache Input 
to ON it will behave as normal sop's and cache.


Pablo Giménez wrote:
> Hi houdiniks.
> Recently I have found myself trying to optimze a tool to mesh particles
> systems from fluid simulations.
> Well my great problem is that with big sim with millions of particles memory
> is a real problem when you have to create the mesh.
> I have found the unload flag quite useful to optimize the memory consuption,
> and I have follow the next approach:
> - Into my HDA doing all the stuff I have set the unload flag for all the
> operators, not referecenced by others to avoid "doubles cooks", but the last
> Null at the end, this way I can reuse the memory of the other operator but
> keep a cache point fo the the rest of the network outside my HDA.
> - Here I have seen that the Null operator has a Cache Input parameter, this
> means I can d othe same as the unload flag in the Null operator but using
> this parameter?
> - Also of course I try to put as mush as possible into VOP SOPs to optimize
> the whole thing.
> Is anybody using the same or similar strategy?
> Am I correct with the Null operator cache stuff?
> thx

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