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

Pablo Giménez pablogipi at gmail.com
Tue Apr 7 12:33:41 EDT 2009


Thanks again for the info Jeff, quite useful.

2009/4/7 <jlait at sidefx.com>

> On Tue, Apr 07, 2009 at 10:40:53AM +0100, Pablo Giménez wrote:
> > 2009/4/6 <jlait at sidefx.com>s
> >
> > > On Mon, Apr 06, 2009 at 06:00:52PM +0200, Ben Schrijvers wrote:
> > > > 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.
> > >
> > >     Close.  The Null SOP is "instanced" by default, and toggling cache
> > > input forces it to make a hard copy rather than just instancing.
> > >    The reason for this is precisely for unloading - if you have a
> > > whole series of switch SOPs (which all instance) you may grow
> > > concerned you've set all your data to unload.  So by making a null SOP
> > > with Unload Off and Cache Input on, you can ensure that becomes a
> > > manual checkpoint.
> >
> > So by "instanced " here it means the node pass through all the data and
> not
> > cache it as a regular operator.
> > If this is the case, I am curious, appart from Null and Switch, are there
> > other SOPs which a re instanced by default?
> > Also, a instanced node is the same as a node with the unload flag set?
> > The unload flag is then a way to "instance" any node ina SOP network?
>
>     Unloaded nodes delete their cache when they are done.  Instanced
> nodes never have a cache, they just borrow their inputs geometry.
>
> Nodes that may, or may not, instance, are:
> AttribComposite
> BlendShapes
> File
> ForEach
> Null
> Script
> SubNet
> Switch
> TimeShift
> --
>         - Jeff Lait
>
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-- 
Un saludo
Best Regards
Pablo Giménez



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