Forums Technical Discussion Enabling/Disabling bind export in point VOP

Enabling/Disabling bind export in point VOP

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mrCatfish
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I have a VOP network that has a bind export. Sometimes I want to export the attribute, and sometimes I don't, (using a toggle). I can't see any way to do this… I tried an elaborate if statement in the callback with opwire and unwires, but it doesn't work, (although it works in the textport).

I'm petty sure this is possible, I just don't remember how.
Sean Lewkiw
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Machine FX - Cinesite MTL
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bonsak
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Hi
On the outside of the vop node you can specify which attributes are exported. Default is all (*). You could probably make some kind of switch here. Here i have excluded an attribute called “debug”:



-b
Edited by bonsak - Dec. 13, 2018 16:14:31

Attachments:
export.png (5.0 KB)

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mrCatfish
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Yup that worked.

I'm putting the workflow here for posterity's sake.

  1. In the hscript callback of the button: 
    opdef:.?flip `ch("exportN")`
  2. In the node tab I added the node I will be modifying the the “editable nodes” parm
  3. In the “extra files” tab I added a new hscript section called “flip”
  4. The code for that is: 
    if ($arg1 == "1") then
    opparm ./rotate_normals vex_outputmask ("*")
else
    opparm ./rotate_normals vex_outputmask ("* ^up")
endif
Be careful with that if statement above. If you don't put the “1” in quotes, it will probably break, (treat it as an integer instead of a string).



Edited by mrCatfish - Dec. 14, 2018 10:41:00

Attachments:
Selection_001.png (25.5 KB)
Selection_002.png (11.3 KB)
Selection_003.png (25.2 KB)

Sean Lewkiw
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Machine FX - Cinesite MTL
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tamte
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rather than making editable nodes and callbacks which will make your HDA very unflexible especially during updating or if you want to animate your toggle

you can directly reference your toggle value in the Export Parameters parm like this"

`ifs(ch("exportN"),"N","")` `ifs(ch("exportup"),"up","")`
attached example

Attachments:
toggle_exports.hip (76.4 KB)

Tomas Slancik
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Method Studios, NY
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Sifis
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tamte
rather than making editable nodes and callbacks which will make your HDA very unflexible especially during updating or if you want to animate your toggle

you can directly reference your toggle value in the Export Parameters parm like this"

`ifs(ch("exportN"),"N","")` `ifs(ch("exportup"),"up","")`
attached example

Thank you Tomas, I always had a hard time to selectively export attributes from VOPs. Very useful trick.
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