[Sidefx-houdini-list] Cd in VOP SOP

Sean Lewkiw seanl at rainmaker.com
Mon Mar 31 12:21:22 EDT 2008


Beautiful, that's it!  Thanks!

Sean

Andrew D Lyons wrote:
> 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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>>  >>>
>>  >>>
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>>  >
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>>
>> --
>>  Sean Lewkiw
>>  --
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>
>
>   

-- 
Sean Lewkiw
--
CIS London
130 Shaftesbury Avenue
London W1D 5EU
--
+44 (0) 207.031.1138 (P) (Direct)
+44 (0) 207.031.1136 (F)
+44 (0) 795.606.7245 (M)
--
Composite Image Systems London Ltd
Registered Office: Denham Media Park, North Orbital Road, Denham, Uxbridge, Middlesex UB9 5HQ
Company Registration No. 5577229 England





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