[Sidefx-houdini-list] Cd in VOP SOP

Andrew D Lyons tstexture at gmail.com
Mon Mar 31 11:47:31 EDT 2008


Have you tried putting the add attr in an if VOP? I think that will do
what you want...

Cheers



On 31/03/2008, Sean Lewkiw <seanl at rainmaker.com> wrote:
> Hm, still don't get it.  Let's say you have no Cd attributes.  A
>  dangling create att VOP will add the Cd attributes no matter what.
>
>  Basically, I want to view a map as point colours, or not view it at
>  all.  If I choose to not view it at all, I don't want my VOP to add Cd
>  point attributes.
>
>  The only ugly hacky way I can see around it is to pipe a string "Cd" and
>  a string "blank" into a switch and then into the "add attribute" VOP.
>  But you will end up with a "" attribute if you don't have Cd.
>
>
>  Sean
>
>
>
>
>
>
>  Ben Schrijvers wrote:
>  > Ah right... and not connecting anything to the Cd output.
>  > Hmmm sounds like that would work.
>  >
>  > nice,
>  > benS
>  >
>  > Louis Dunlevy wrote:
>  >
>  >> the import attribute vop has a success flag. you could pipe that to an
>  >> if subnet containing an add attribute vop
>  >>
>  >> Ben Schrijvers wrote:
>  >>
>  >>
>  >>> Hi Sean,
>  >>>
>  >>> I geuss as soon as you connect something to the Cd output inside the VOP
>  >>> Sop it will output Cd.
>  >>> Don't think you can do the switch inside the VOP Sop..
>  >>> So maybe you need to use an Attribute Sop to delete the Cd attribute and
>  >>> a Switch Sop with expression to do the switch afterward.
>  >>> You could use the hasattribute() expression to test if there was a Cd
>  >>> attribute on the input of the VOP Sop.
>  >>>
>  >>> cheers,
>  >>> benS
>  >>>
>  >>>
>  >>> Sean Lewkiw wrote:
>  >>>
>  >>>
>  >>>
>  >>>> Hi,
>  >>>>
>  >>>> Let's say I want to be able to switch between affecting point colours
>  >>>> using a VOP SOP and not affecting point colours.
>  >>>>
>  >>>> Right now I'm using a switch VOP.  If the geo has no point colours to
>  >>>> begin with, it gets assigned point colours when switched to what I want
>  >>>> to be a null effect.  I can't figure out how you can make a switchable
>  >>>> effect that has no effect if that's what you want.
>  >>>>
>  >>>> Sean
>  >>>>
>  >>>>
>  >>>>
>  >>>>
>  >>>>
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Andrew D Lyons | Digital Artist | http://www.tstex.com
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