ehi Paul,
yes that's not intuitive at all,
after a little reasearch and talking with colleagues we ended up with the
idea that that code is not efficient for 2 reasons:
1 - it creates a selection list with ALL the nodes in the scene, which is
kind of slow and unneeded considered that I only need surface nodes.
Furthermore the glob matching seems not to be so quick.
... AND AFTER that it filters out only the geometries.
It's much better to grab only the geometries since the beginning, and then
filter them using the name filter (regex).
2 - there is no need to pass thu a selection list. All i needed is an
iterator, so I could simply use MItDag class which automatically creates an
iterator which works on the whole dag network and can filter in the geometry
only:
...
iterate=OM.MItDag (OM.MItDag.kDepthFirst,OM.MFn.kSurface)
objMObject=OM.MObject()
iterate.reset()
while (not iterate.isDone()):
iterate.getPath(objDagPath)
objMObject=iterate.currentItem()
printVerbose (ve,objDagPath.fullPathName()+"
("+objMObject.apiTypeStr()+")")
iterate.next()
...
Alessandro
On Mon, Jul 6, 2009 at 9:02 PM, Paul Molodowitch <[email protected]> wrote:
>
> It would seem your intuition about getting the transform nodes was
> right: try running this:
>
> http://pastebin.com/f2d0d95a5
>
> import maya.OpenMaya as OM
> import maya.cmds as cmds
>
> def printGeo():
> # creates the selection
> geoMSelectionList = OM.MSelectionList()
> OM.MGlobal.getSelectionListByName("*", geoMSelectionList)
> iterate=OM.MItSelectionList(geoMSelectionList,OM.MFn.kSurface) #
> in my selection iteration I want to filter on the kMesh or
> kNurbsSurface
>
>
> # this is the code to print out the selection list and the api
> type of each filtered object in the selection
> fnDagNode=OM.MFnDagNode()
> objMObject=OM.MObject()
> selStrings =[]
> iterate.reset()
> while (not iterate.isDone()):
> iterate.getDependNode(objMObject)
> fnDagNode.setObject(objMObject)
> iterate.getStrings(selStrings)
> print "sel strings:", selStrings
> print(fnDagNode.fullPathName()+" ("+objMObject.apiTypeStr()+")")
> iterate.next()
>
> cmds.file(new=1, f=1)
> cmds.polySphere()
> cmds.sphere()
>
> printGeo()
>
> Even though it returns the same MObject, the selection strings
> indicate one is grabbed from the transform.
>
> According to the docs, it's intended behavior to search below the
> transform when there's a filter:
>
> "If a filter is specified then the children of DAG selection items
> will be searched if the selection item does not match the filter. For
> example, if filter = MFn::kNurbsCurve and a transform is selected then
> the underlying shape for the transform will be in the iteration if it
> is a nurbs curve."
>
> Seems non-intuitive to me too...
>
> - Paul
>
> >
>
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http://groups.google.com/group/python_inside_maya
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