Re: [Maya2osg-users] Add osg::Switch support to Maya2Osg

[Javier T. <jav...@gm...>]

  Hi David,

  Sorry for the delay. I have reviewed your code and changed a few things.
The check for the dynamic attribute "isSwitch" has been simplified, and an
additional check for the presence of the switch is added before adding it
as a child of the transform node.

  Also, I added a pair of buttons to the shelf, so you can easily select
any transform in your scene and convert it to a switch or undo it. No icons
for this buttons (default icon), if anybody wants to contribute with some
art to the project, is welcome :)

  These changes are commited to trunk (r266).

  It would be nice to add also the switch configuration to Maya node, but
it is not trivial to keep it up-to-date with Maya scene graph (maybe
connecting the switch values with the visibility attribute of the
children). We'll let it for a future release :)

  If you send me the code with the corrections to the cubeMap, I'll take a
look as soon as I have time.


  Regards,


On Wed, Feb 4, 2015 at 1:50 PM, BOYREL David <dav...@ok...> wrote:

>  Hi Javier,
>
>
>  Sorry for being so long to answer your mail.
>
>
>  You will find attached to this email a submission for the osg::Switch
> support to maya2osg.
>
>
>  The modification I made is the one we discussed : if a custom attribute
> named "isSwitch" is
>
> found on a maya transform node,  the maya node is exported with an
> osg::MatrixTransform
>
> with an osg::Switch as a child, to keep to transformation data. The name
> of the attribute is case
>
> insensitive.
>
>
>  The modification was made only on the group.cpp file. The revision I
> used is the head one (r265
>
> from trunk).
>
>
>  Tell me if this modification is good for you.
>
>
>  I also found a problem in the setting of texture filter type of cubeMap
> textures. It seems that the
>
> test of the "filterType" plug is done on the wrong node. It needs to be
> tested a bit more. I'll send
>
> you a submission when I cleaned my code.
>
>
>  Best Regards.
>
>
>   --
> David BOYREL
> OKTAL Paris
> 19 Bd des Nations Unies - 92190 Meudon (France)
> Tél. : +33 (0)1 46 94 93 52
> Fax : +33 (0)1 41 41 91 44
> http://www.oktal.fr
>
>   ------------------------------
> *De :* Javier Taibo <jav...@gm...>
> *Envoyé :* mardi 18 novembre 2014 22:01
>
> *À :* may...@li...
> *Objet :* Re: [Maya2osg-users] Add osg::Switch support to Maya2Osg
>
>    Hi David,
>
>    Create custom Maya nodes is a bit overkill for what you want, if I am
> understanding it correctly what you are trying to do.
>
>    I suppose all you need to do is check for the "script" attribute(s)
> and create a osg::Switch when present or an osg::Transform otherwise. It
> seems a light modification to the exporter, and should not break anything,
> so I would be happy to add it to the trunk. Send me the modified file(s)
> and I will review and commit them. Just follow the OSG submission rules
> (whole files, not patches). Thank you!
>
>
>    Regards,
>
>
>  On Tue, Nov 18, 2014 at 10:05 AM, BOYREL David <dav...@ok...>
> wrote:
>
>>  Hi Javier,
>>
>>
>>  Thank you very much for your quick answer.
>>
>>
>>  Your suggestion is wise. I'm not experienced enough with maya to be
>> sure the solution I choose is the right one. But I saw that introducing new
>> kind of nodes in Maya will indeed results in errors when loading the Maya
>> scene in absence of maya2osg.
>>
>>
>>  Using custom attributes seems good to me.
>>
>>
>>  Do you think that I could submit to maya2osg the support of osg::Switch
>> using custom attributes?
>>
>>
>>  Because I need anyway to perform some custom operations on the
>> generated OSG scene graph, so I could manage osg::Switch at that time,
>> based on the OSG nodes description, and leave the maya2osg exporter as it
>> is.
>>
>>
>>  Tell me if osg::Switch support may interest some other users of
>> maya2osg.
>>
>>
>>  Thank you again for your answer.
>>
>>
>>  Regards,
>>
>>
>>  --
>> David BOYREL
>> OKTAL Paris
>> 19 Bd des Nations Unies - 92190 Meudon (France)
>> Tél. : +33 (0)1 46 94 93 52
>> Fax : +33 (0)1 41 41 91 44
>> http://www.oktal.fr
>>
>>   ------------------------------
>> *De :* Javier Taibo <jav...@gm...>
>> *Envoyé :* vendredi 14 novembre 2014 20:43
>> *À :* may...@li...
>> *Objet :* Re: [Maya2osg-users] Add osg::Switch support to Maya2Osg
>>
>>     Hi David,
>>
>>    IMHO the best way to do what you want is by far the third one. It is
>> quite easy to add an extra attribute to a Maya transform node and later
>> check in the exporter whether the transform is marked as a switch and
>> create a Switch or a Transform depending on the case.
>>
>>    From mel you can do it with something like that:
>>
>>    addAttr -ln "isSwitch"  -at bool  | pSphere1;
>>
>>
>>    Regards,
>>
>>
>> On Fri, Nov 14, 2014 at 4:53 PM, BOYREL David <dav...@ok...>
>> wrote:
>>
>>>  Hello people,
>>>
>>>
>>>  My name is David Boyrel from Oktal company. We develop a driving
>>> simulation software (SCANeR Studio),
>>>
>>> which visual application is based on OSG. You can find some (old) images
>>> on the OSG website :
>>>
>>>
>>>
>>> http://www.openscenegraph.org/index.php/gallery?AG_MK=0&AG_form_paginInitPages_1=1&AG_form_albumInitFolders_1=Screenshots/SCANeRII&AG_form_scrollTop=456&AG_form_scrollLeft=0&AG_MK=0
>>>
>>>
>>>  I am currently testing maya2osg  in order to provide to some of our
>>> customers a way to export their database and vehicle
>>>
>>> production from Maya to our simulation software. For now, they use the
>>> OpenFlight exporter. Maya2osg seems to be more
>>>
>>> flexible.
>>>
>>>
>>>  In order to add some logical informations into the scene graph, I'm
>>> currently searching a way to add osg::Switch support to maya2osg.
>>>
>>>
>>>  Since I'm not very familiar with both Maya modeler and Maya API, I
>>> thought about 3 ways to do this. But I'm not sure if these
>>>
>>> methods are correct. Here are my thoughts :
>>>
>>>
>>>  1. Adding to the plugin a new custom DAG node, and to the exporter
>>> shelf a command to create this kind of node, as a child
>>>
>>>  of the currently selected node.
>>>
>>>  I managed to do this by creating a custom node that inherits
>>> MPxTransform. This node will become an osg::Switch
>>>
>>>  when exported by maya2osg.
>>>
>>>  However, I understood DAG nodes are only Transforms or Shapes. So
>>> my new DAG node does not seem to fit the Maya approach.
>>>
>>>  And I would have to convert this node to an osg::Switch above an
>>> osg::MatrixTransform.
>>>
>>>
>>>  2. Adding to the plugin a new custom node (not a DAG node), and to the
>>> exporter shelf a command to create this kind of node.
>>>
>>>  This new type of node will have an output attribute (maybe a table, I
>>> don't know if its possible), that could be plugged to a
>>>
>>>  DAG node "visibility" attribute.
>>>
>>>  So this new node will not be a DAG node, and so will not have any
>>> parent or children.
>>>
>>>  I feel this is more the "Maya way" to give to maya users the ability to
>>> create switches.
>>>
>>>
>>>  3. Just adding a custom attribute to maya nodes.
>>>
>>>  I saw the maya2osg exporter writes custom attributes to the OSG nodes
>>> description.
>>>
>>>  I could then use a traverser to find the nodes having the switch
>>> attribute description, and then
>>>
>>>  modify the scene graph to insert a Switch above the node.
>>>
>>>
>>>
>>>  But adding a custom attribute in Maya does not seem to be very
>>> intuitive.
>>>
>>>
>>>  I do not know Maya and its API very well, so maybe I'm totally wrong.
>>>
>>> So if you could please tell me what you think about this, or how would
>>> you do this, I would be grateful.
>>>
>>>
>>>  My hope is to submit this development to maya2osg. That's why I tell
>>> you about this.
>>>
>>>
>>>  Regards,
>>>
>>>
>>>  --
>>> David BOYREL
>>> OKTAL Paris
>>> 19 Bd des Nations Unies - 92190 Meudon (France)
>>> Tél. : +33 (0)1 46 94 93 52
>>> Fax : +33 (0)1 41 41 91 44
>>> http://www.oktal.fr
>>>
>>>
>>>
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>>>
>>
>>
>>  --
>> Javier Taibo
>>
>>
>>
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>
>
>  --
> Javier Taibo
>
>
>
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-- 
Javier Taibo