> I'm wondering about pymel, as it seem to be powerful and much more
> "pythonic", but I've a few questions:
> -is pymel easy to install and use?
installing it for use from within the maya GUI is very easy -- no
harder than any other python module. it takes a little more know-how
to get it working through an external interpreter.
> -is there a documentation to find all the functionalities as with the
> api?
docs are here, which also includes installation instructions:
http://pymel.googlecode.com/svn/docs/index.html
you'll find all the api-equivalent classes in nodetypes and datatypes.
> -can I do everything with pymel as I could (if I knew ;) ) with the
> API?
you can't do *everything* the API can, but you can do most everything,
plus a lot more. you cannot use pymel to make new plugins. there are
some api types and methods which are not wrapped. pymel is not trying
to be a replacement for the API, but rather something that exists on
the spectrum between the API and MEL.
-chad
>
> Thank you for your help.
> Philippe.
>
> On 25 mar, 20:32, Paul Molodowitch <[email protected]> wrote:
>> 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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