Determining if object is a DAG node

[Jeremy YeoKhoo]

(Sorry I posted this up before but tried to edit it.)

Hi guys,

This is a bit silly. But... 

I am trying to determine if a queried object is a dag node or a shape node because my current example code has the following.... 

import maya.cmds as cmds

obj= cmds.polySphere(r= 1, sx= 20, sy= 20, ax=[0, 1, 0], cuv= 2, ch= 0) 
cmds.select(obj, r=1)

sels= cmds.ls(sl=1)

result= cmds.listRelatives(sels[0],c=1, s=0)

within result, I still get a shape object in the list....

So the way I check if it is a DAG node, I would then

for r in result:
    if cmds.objExists(r+"tx"):
       print "This is daggy"

Is there a better way of coding this? 

-Jeremy

[Marcus Ottosson]

Hi Jeremy,

Almost all nodes in Maya is inherited from some other node; e.g. shape inherits dagNode.

You can query this inheritance using the cmds.nodeType command:

from maya import cmds

if 'dagNode' in cmds.nodeType('pCubeShape1', inherited=True):
    print "This is a dag node"

​

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[Jeremy YeoKhoo]

Gah! Of course thanks again Marcus :)

[Arjun Thekkummadathil]

if you say

ls -dag

it will list only dag objects

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[Marcus Ottosson]

Gah! Of course thanks again Marcus :)

You’re welcome. :)

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[Paul Molodowitch]

Also, a more direct way of querying if an object is a specific type of node is:

cmds.objectType(myNode, isAType='transform')

...which will return True for all transforms and joints (which inherit from transforms), for instance.

Using cmds.nodeType(myNode, inherited=True) has the added bonus of helping you learn the inheritance hiearchy, though...

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[Jeremy YeoKhoo]

Thanks for that elrond79

On Friday, 23 May 2014 14:38:39 UTC+10, Jeremy YeoKhoo wrote: