Your proplem is that lsFn.listAllRenderLayers doesn't actually return
a value - instead, it stores it's result in objArr.
You have to do this.
import maya.OpenMaya as om
import maya.OpenMayaRender as omRender
objArr = om.MObjectArray()
lsFn = omRender.MFnRenderLayer()
lsFn.listAllRenderLayers (objArr )
for i in xrange(objArr.length()):
print omRender.MFnRenderLayer(objArr[i]).name()
Unfortunately, the API was designed with C++ in mind, so it doesn't
behave very 'pythonically'. If you want a way to interact with the
api that behaves more like you expect, try pymel.
The same task in pymel:
from pymel import *
print RenderLayer.listAllRenderLayers()
Done. =)
-Paul
On Wed, Mar 25, 2009 at 10:06 AM, kzax <[email protected]> wrote:
>
> Hello, I'm trying to learn how to use the API to solve a problem with
> render layers with pre render script.
> To begin to learn I'm trying to make a list of render layers wich are
> in my scene :
>
> import maya.OpenMaya as om
> import maya.OpenMayaRender as omRender
>
> objArr = om.MObjectArray()
> lsFn = omRender.MFnRenderLayer()
> l = lsFn.listAllRenderLayers (objArr )
> print l
>
> and the answer is always 'None', but there are render layers in the
> scene!
> What's wrong?
> Thanks,
> Philippe.
> >
>
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