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sirogi

custom handles

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Hi there!

I was just modelling using the Copy SOP, nothing fancy just a circular array, and found myself going back to the parameters tab, and moving the pivot in xyz, with the number ladder!...old houdini-style!! grr....

I remember seeing in a demo last siggraph (or was it last night in my dreams....) that you can bind a handle to any parameter in a SOP, I just wanted to slap a translate handle on the pivot if possible...any ideas?

cheers...

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---- begin script ----

ombind -t sop "Copy Pivot" copy:px xform:tx

ombind -t sop "Copy Pivot" copy:py xform:ty

ombind -t sop "Copy Pivot" copy:pz xform:tz

--- end script ---

have fun,

dante

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:o he he he he....thanks..... :)

I'm not gonna complain about not having a GUI way of doing this, since it seems like you'd have a lot of instances where it could be useful.....

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i think that was what they wanted to do (a GUI handle binder) but ran out of time. i wouldn't be surprised if we see this in 6.0

the grand tapir.

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Hey

You can add handles and link them to parameters using hscript. 
What I did was use Python and from there call hscript to create handles, Unfortunately at this point in time i don't have any example code or files.

Have a look at http://www.sidefx.com/docs/houdini/commands/pomadd

But i do remember having difficulties deleting the handles afterwards, and having memory leaks.

It's not much but hope it helps.

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Hallo Konstantin

I finally had time to go trough my old work and find an example file.
It takes a curve or line and creates transform handles for each point. The handles are then linked to parameters. From the parameters they could be linked back to attribute data.

I't might be possible to directly attach handles to attribute data but i'm not sure about that.

Hope this helps you on your way.

custom handles.hipnc

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Hi @Maurits,

Are you able to explain me a bit what the code does ? I have a decent background in programming, but with the lack of comments, I don't really know what variables like cpn, cpo, cn and co does. I would like to learn how to create custom handles like you did. So, I'm trying to understand what you did. It would be very appreciated.

Thank you !

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Hi  anthonyblanchettepotvin

Sorry for the really late response.
From what i can getter from the code and looking at the nodes. 

cpn == Parm name of the parm containg the base positions of the custom parms.
cpo == the Parm expresion for cpn
cn
== Parm name of the parm containing the offset position relative to the value contained in cpn
co
== The parm expresion for cn

These variables in the first python node mainly help setup the location and exprespion scripts used to control the location of each extra handle.
Hope it might still be of some use.

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