[API] Is there a way to return a list of nodes from a imported scene using open maya?

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I73

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Sep 20, 2017, 2:38:40 PM9/20/17
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This is not really a python it's a C++ question but Open maya can work here, since there is no 'C++ programming for Autodesk Maya' google group. 

Python 'cmds.file(file, i = True) returns a list of nodes, but looking through the API there is no such function to return that list.

The tool opens a original file (Gets the mesh from the file 'Mesh1') then imports a scene (and I take the mesh from that scene 'Mesh2'), because I have no reference to the 2 mesh nodes (I can't get by name since all them will be different) I can't select the imported mesh node unless I can access the imported node array and return it from that array.

Looking for a way to get these mesh nodes, I can achieve this by namespace but, when I go to save the scene will the namespace still be appended to the exported scene?

Thanks guys, just let me know if this is not following group rules. 

Justin Israel

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Sep 20, 2017, 3:41:44 PM9/20/17
to Python Programming for Autodesk Maya

C++ topics are fine, regardless of the title of the group. We tend to chat about anything related to VFX development, but commonly it is Maya development.

I think your two options through the C++ api are to either

1) save the current list of node, do the import, and then get the difference between the current previous nodes

2) do the import through MGlobal::executeCommand and get the nodes from the command apis high level import

Justin


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Nicolas Combecave

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Sep 20, 2017, 3:45:46 PM9/20/17
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Did not test, but there is this flag you can pass to the command:
file -import -returnNewNodes

The doc says it will return the nodes added to the scene...


- Nicolas


2017-09-20 21:41 GMT+02:00 Justin Israel <justin...@gmail.com>:

C++ topics are fine, regardless of the title of the group. We tend to chat about anything related to VFX development, but commonly it is Maya development.

I think your two options through the C++ api are to either

1) save the current list of node, do the import, and then get the difference between the current previous nodes

2) do the import through MGlobal::executeCommand and get the nodes from the command apis high level import

Justin

On Thu, Sep 21, 2017, 6:38 AM I73 <wesley....@iugome.com> wrote:
This is not really a python it's a C++ question but Open maya can work here, since there is no 'C++ programming for Autodesk Maya' google group. 

Python 'cmds.file(file, i = True) returns a list of nodes, but looking through the API there is no such function to return that list.

The tool opens a original file (Gets the mesh from the file 'Mesh1') then imports a scene (and I take the mesh from that scene 'Mesh2'), because I have no reference to the 2 mesh nodes (I can't get by name since all them will be different) I can't select the imported mesh node unless I can access the imported node array and return it from that array.

Looking for a way to get these mesh nodes, I can achieve this by namespace but, when I go to save the scene will the namespace still be appended to the exported scene?

Thanks guys, just let me know if this is not following group rules. 

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Wesley Keeling

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Sep 20, 2017, 3:50:16 PM9/20/17
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Currently my work around is importing with a name space. I was thinking of comparing but there is just too many nodes. 

2) do the import through MGlobal::executeCommand and get the nodes from the command apis high level import

Do you have a suggestion on how to do this? I did not know I could return anything other than a MStatus or a MString from executePythonCommandStringResult()

On Wed, Sep 20, 2017 at 12:41 PM, Justin Israel <justin...@gmail.com> wrote:

C++ topics are fine, regardless of the title of the group. We tend to chat about anything related to VFX development, but commonly it is Maya development.

I think your two options through the C++ api are to either

1) save the current list of node, do the import, and then get the difference between the current previous nodes

2) do the import through MGlobal::executeCommand and get the nodes from the command apis high level import

Justin


On Thu, Sep 21, 2017, 6:38 AM I73 <wesley....@iugome.com> wrote:
This is not really a python it's a C++ question but Open maya can work here, since there is no 'C++ programming for Autodesk Maya' google group. 

Python 'cmds.file(file, i = True) returns a list of nodes, but looking through the API there is no such function to return that list.

The tool opens a original file (Gets the mesh from the file 'Mesh1') then imports a scene (and I take the mesh from that scene 'Mesh2'), because I have no reference to the 2 mesh nodes (I can't get by name since all them will be different) I can't select the imported mesh node unless I can access the imported node array and return it from that array.

Looking for a way to get these mesh nodes, I can achieve this by namespace but, when I go to save the scene will the namespace still be appended to the exported scene?

Thanks guys, just let me know if this is not following group rules. 

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Justin Israel

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Sep 20, 2017, 4:00:04 PM9/20/17
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On Thu, Sep 21, 2017, 7:50 AM Wesley Keeling <wesley....@iugome.com> wrote:
Currently my work around is importing with a name space. I was thinking of comparing but there is just too many nodes. 

2) do the import through MGlobal::executeCommand and get the nodes from the command apis high level import

Do you have a suggestion on how to do this? I did not know I could return anything other than a MStatus or a MString from executePythonCommandStringResult()

executeCommand (and the python variant) have a ton of overloads for different return types. MStringArray is one of them




On Wed, Sep 20, 2017 at 12:41 PM, Justin Israel <justin...@gmail.com> wrote:

C++ topics are fine, regardless of the title of the group. We tend to chat about anything related to VFX development, but commonly it is Maya development.

I think your two options through the C++ api are to either

1) save the current list of node, do the import, and then get the difference between the current previous nodes

2) do the import through MGlobal::executeCommand and get the nodes from the command apis high level import

Justin


On Thu, Sep 21, 2017, 6:38 AM I73 <wesley....@iugome.com> wrote:
This is not really a python it's a C++ question but Open maya can work here, since there is no 'C++ programming for Autodesk Maya' google group. 

Python 'cmds.file(file, i = True) returns a list of nodes, but looking through the API there is no such function to return that list.

The tool opens a original file (Gets the mesh from the file 'Mesh1') then imports a scene (and I take the mesh from that scene 'Mesh2'), because I have no reference to the 2 mesh nodes (I can't get by name since all them will be different) I can't select the imported mesh node unless I can access the imported node array and return it from that array.

Looking for a way to get these mesh nodes, I can achieve this by namespace but, when I go to save the scene will the namespace still be appended to the exported scene?

Thanks guys, just let me know if this is not following group rules. 

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Nicolas Combecave

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Sep 20, 2017, 4:27:59 PM9/20/17
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Mmmm I just misread the very first mail, where you specify you need to do it with the api..

Sorry for the noise.

2017-09-20 21:59 GMT+02:00 Justin Israel <justin...@gmail.com>:


On Thu, Sep 21, 2017, 7:50 AM Wesley Keeling <wesley....@iugome.com> wrote:
Currently my work around is importing with a name space. I was thinking of comparing but there is just too many nodes. 

2) do the import through MGlobal::executeCommand and get the nodes from the command apis high level import

Do you have a suggestion on how to do this? I did not know I could return anything other than a MStatus or a MString from executePythonCommandStringResult()

executeCommand (and the python variant) have a ton of overloads for different return types. MStringArray is one of them


On Wed, Sep 20, 2017 at 12:41 PM, Justin Israel <justin...@gmail.com> wrote:

C++ topics are fine, regardless of the title of the group. We tend to chat about anything related to VFX development, but commonly it is Maya development.

I think your two options through the C++ api are to either

1) save the current list of node, do the import, and then get the difference between the current previous nodes

2) do the import through MGlobal::executeCommand and get the nodes from the command apis high level import

Justin


On Thu, Sep 21, 2017, 6:38 AM I73 <wesley....@iugome.com> wrote:
This is not really a python it's a C++ question but Open maya can work here, since there is no 'C++ programming for Autodesk Maya' google group. 

Python 'cmds.file(file, i = True) returns a list of nodes, but looking through the API there is no such function to return that list.

The tool opens a original file (Gets the mesh from the file 'Mesh1') then imports a scene (and I take the mesh from that scene 'Mesh2'), because I have no reference to the 2 mesh nodes (I can't get by name since all them will be different) I can't select the imported mesh node unless I can access the imported node array and return it from that array.

Looking for a way to get these mesh nodes, I can achieve this by namespace but, when I go to save the scene will the namespace still be appended to the exported scene?

Thanks guys, just let me know if this is not following group rules. 

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Wesley Keeling

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Sep 20, 2017, 4:47:19 PM9/20/17
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You are correct, for some reason I missed the ref params :/

On Wed, Sep 20, 2017 at 12:59 PM, Justin Israel <justin...@gmail.com> wrote:


On Thu, Sep 21, 2017, 7:50 AM Wesley Keeling <wesley....@iugome.com> wrote:
Currently my work around is importing with a name space. I was thinking of comparing but there is just too many nodes. 

2) do the import through MGlobal::executeCommand and get the nodes from the command apis high level import

Do you have a suggestion on how to do this? I did not know I could return anything other than a MStatus or a MString from executePythonCommandStringResult()

executeCommand (and the python variant) have a ton of overloads for different return types. MStringArray is one of them




On Wed, Sep 20, 2017 at 12:41 PM, Justin Israel <justin...@gmail.com> wrote:

C++ topics are fine, regardless of the title of the group. We tend to chat about anything related to VFX development, but commonly it is Maya development.

I think your two options through the C++ api are to either

1) save the current list of node, do the import, and then get the difference between the current previous nodes

2) do the import through MGlobal::executeCommand and get the nodes from the command apis high level import

Justin


On Thu, Sep 21, 2017, 6:38 AM I73 <wesley....@iugome.com> wrote:
This is not really a python it's a C++ question but Open maya can work here, since there is no 'C++ programming for Autodesk Maya' google group. 

Python 'cmds.file(file, i = True) returns a list of nodes, but looking through the API there is no such function to return that list.

The tool opens a original file (Gets the mesh from the file 'Mesh1') then imports a scene (and I take the mesh from that scene 'Mesh2'), because I have no reference to the 2 mesh nodes (I can't get by name since all them will be different) I can't select the imported mesh node unless I can access the imported node array and return it from that array.

Looking for a way to get these mesh nodes, I can achieve this by namespace but, when I go to save the scene will the namespace still be appended to the exported scene?

Thanks guys, just let me know if this is not following group rules. 

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