How can i duplicate DG node to use maya api?

[ktj428]

  Hello

  first my English is not good... ^^;; sorry about my english..

  My question is that.

  I want to copy any dependency node.

  It seems like to use duplication command in Mel or Python command.

  

  If it is DAG node, MFnDagNode class will provide duplication function.

  But I couldn't find duplication function for dependency node in api document.

  How can i duplicate dependency node?

[Janos Hunyadi]

Look into MFnMesh - copy to copy meshed

and

MDagModifier - createNode for the rest - attributes you have to copy them manually

J

[ktj428]

thank you for your reply!!

I would like to know something..

If I use MDagModifier or MDGModifier, Do i have to connect all of value or plugs by myself???

Such as, if animation curve node is duplicated, does the new animation curve node get all of keyframes from source node after got them?

Does it same progress as duplicate command in Mel?

[Janos Hunyadi]

You have to query, find and copy the values manually. You could run a mel command through MGlobal, and it will set up all the connections for you but that way you're getting out of the API, and you can only hope to trust maya that It's going to do what you would like to do :)

[ktj428]

Ah.. so I have to copy all of values manually... It is not easy way ^^

thank you for your answer!!!

[Marcus Ottosson]

Does it have to be using the API?

How about:

from maya import cmds
cmds.duplicate('MyNode')

It’s got flags to also copy connections, or to duplicate the nodes leading into it.

​

On 20 August 2014 12:25, ktj428 <ktj...@gmail.com> wrote:

Ah.. so I have to copy all of values manually... It is not easy way ^^

thank you for your answer!!!

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[ktj428]

Yes, also python command is used for my project..

In my opinion, it is easy way to find solution. cmds.duplicate() is posiible to copy all of nodes in maya.

But I took a problem to speed, when I duplicate too many objects. So just i want to make a code for duplicate to use api..

Thank you for your advice. people are too kind ^^

[Marcus Ottosson]

Ah, I see.

Well, for speed, it might help to export selected nodes or hierarchies and import them back in. That would essentially rely on Maya's serialisation/deserialisation mechanism for duplicating, which is pretty fast and solid.

You'd have a namespace to deal with if you do, but that shouldn't be much different from how you would otherwise have to take care of names by manually duplicating.

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[ktj428]

  Wow It is awesome!! 

  Thank you for give me good solution!!!

  Your advice is possible to apply some of my projects..

  appreciate your answer!!

[Marcus Ottosson]

No problem, glad to help!

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