[vtkusers] vtkPLYWriter : vertices are not generated in a the PLY file
MOUSSAUD David 244079
David.MOUSSAUD at cea.fr
Tue Jan 12 11:50:41 EST 2016
Here are the files !
Just change the path to the VTK libs.
Best regards,
David
-----Message d'origine-----
De : Cory Quammen [mailto:cory.quammen at kitware.com]
Envoyé : lundi 11 janvier 2016 17:17
À : MOUSSAUD David 244079 <David.MOUSSAUD at cea.fr>
Cc : vtkusers at vtk.org
Objet : Re: [vtkusers] vtkPLYWriter : vertices are not generated in a the PLY file
An example with Qt would be fine.
Thanks,
Cory
On Mon, Jan 11, 2016 at 11:13 AM, MOUSSAUD David 244079 <David.MOUSSAUD at cea.fr> wrote:
> Hello,
>
> No, due to project time constraint, i had to implement my method to
> generate the PLY file.
> By the way, the stlWriter works very well. It uses the same
> vtkPolyData that my plyWriter.
>
> stlWriter->SetFileName(filename.c_str());
> stlWriter->SetInputData(polydata);
> stlWriter->SetFileTypeToBinary();
> stlWriter->Write();
>
> I have a small example that figure out that problem but it is based on
> Qt widgets and qmake. Are you interested in ?
> Otherwise, maybe you could enhance the examples for C++ that shows how
> a plyWriter can be used with a vtkPolyData ?
>
> Best regards,
> David.
>
>
> ________________________________________
> De : Cory Quammen [cory.quammen at kitware.com] Envoyé : lundi 11 janvier
> 2016 15:17
>
>
> À : MOUSSAUD David 244079
> Cc : vtkusers at vtk.org
> Objet : Re: [vtkusers] vtkPLYWriter : vertices are not generated in a
> the PLY file
>
> David,
>
> Have you made any progress on this issue?
>
> I can generate a Point Source in ParaView and save it to a PLY file.
> It saved the point locations just fine. By the way, ParaView uses the
> vtkPLYWriter to write points.
>
> I don't see anything odd in the reader that would cause me to think
> your points wouldn't get written.
>
> If you are still having trouble, could you post a self-contained .cxx
> file and CMakeLists.txt file? That will make it easier for us to
> diagnose what is going on.
>
> Thanks,
> Cory
>
> On Thu, Jan 7, 2016 at 11:44 AM, MOUSSAUD David 244079
> <David.MOUSSAUD at cea.fr> wrote:
>> Yes it works, I have already success to generate one (without using
>> vtk library).
>> After the line "end_header', you have to write line by line the 3
>> coordinates of the vertices and theirs RGB colors (3 more numbers)
>> You don't need to generate the faces if it is set to the 0 value in
>> the header.
>> Best Regards,
>>
>> David MOUSSAUD
>>
>> ________________________________________
>> De : Cory Quammen [cory.quammen at kitware.com] Envoyé : jeudi 7 janvier
>> 2016 16:58 À : MOUSSAUD David 244079 Cc : vtkusers at vtk.org Objet :
>> Re: [vtkusers] vtkPLYWriter : vertices are not generated in a the PLY
>> file
>>
>> Hi David,
>>
>> Can you confirm that the PLY file format supports single-vertex cells
>> like this? My perusal of the PLY documentation didn't reveal anything.
>>
>> Thanks,
>> Cory
>>
>> On Thu, Jan 7, 2016 at 9:55 AM, MOUSSAUD David 244079
>> <David.MOUSSAUD at cea.fr> wrote:
>>> Hi all,
>>>
>>>
>>>
>>> I've got a problem to generate a simple ply file with 4 vertices.
>>>
>>> Here how i proceed :
>>>
>>>
>>>
>>> // Setup points
>>>
>>> points = vtkSmartPointer<vtkPoints>::New();
>>>
>>>
>>> // Setup the colors array
>>>
>>> colors = vtkSmartPointer<vtkUnsignedCharArray>::New();
>>>
>>> colors->SetNumberOfComponents(3);
>>>
>>> colors->SetName("Colors");
>>>
>>>
>>> // create a vertex
>>>
>>> vertex = vtkSmartPointer<vtkVertex>::New();
>>>
>>>
>>> // list of all the vertices
>>>
>>> vertices= vtkSmartPointer<vtkCellArray>::New();
>>>
>>>
>>> /* Create a PLY Writer */
>>>
>>> plyWriter = vtkSmartPointer<vtkPLYWriter>::New();
>>>
>>>
>>> // Create a polydata object and add everything to it
>>>
>>> polydata = vtkSmartPointer<vtkPolyData>::New();
>>>
>>> polydata->SetPoints(points);
>>>
>>> polydata->SetVerts(vertices);
>>>
>>> polydata->GetPointData()->SetScalars(colors);
>>>
>>>
>>>
>>> Then here how i create my vertices and how i set them :
>>>
>>>
>>>
>>> points->Resize(4);
>>>
>>> points->SetPoint(0, 0.0, 0.0, 0.0);
>>>
>>> points->SetPoint(1, 1.0, 0.0, 0.0);
>>>
>>> points->SetPoint(2, 0.0, 1.0, 0.0);
>>>
>>> points->SetPoint(3, 0.0, 0.0, 1.0);
>>>
>>>
>>> vertices->Initialize();
>>>
>>>
>>> vertex->GetPointIds()->SetId(0,0);
>>>
>>> vertices->InsertNextCell(vertex);
>>>
>>>
>>> vertex->GetPointIds()->SetId(0,1);
>>>
>>> vertices->InsertNextCell(vertex);
>>>
>>>
>>> vertex->GetPointIds()->SetId(0,2);
>>>
>>> vertices->InsertNextCell(vertex);
>>>
>>>
>>> vertex->GetPointIds()->SetId(0,3);
>>>
>>> vertices->InsertNextCell(vertex);
>>>
>>>
>>> colors->Initialize();
>>>
>>> colors->InsertNextTuple3(255,0,0);
>>>
>>> colors->InsertNextTuple3(0,255,0);
>>>
>>> colors->InsertNextTuple3(0,0,255);
>>>
>>> colors->InsertNextTuple3(255,255,255);
>>>
>>>
>>>
>>> QString plyFilePath = "output.ply";
>>>
>>>
>>> std::string filename = plyFilePath.toStdString();
>>>
>>> plyWriter->SetFileName(filename.c_str());
>>>
>>>
>>> plyWriter->SetInputData(polydata);
>>>
>>>
>>>
>>> plyWriter->SetColorModeToUniformPointColor();
>>>
>>> plyWriter->SetArrayName("Colors");
>>>
>>> plyWriter->SetFileTypeToASCII();
>>>
>>> plyWriter->Write();
>>>
>>>
>>>
>>> I've checked that the 4 vertex are well displayed (cf screenshot).
>>>
>>>
>>>
>>> Unfortunately, my ply file shows 0 vertex.
>>>
>>>
>>>
>>> ply
>>> format ascii 1.0
>>> comment VTK generated PLY File
>>> obj_info vtkPolyData points and polygons: vtk4.0 element vertex 0
>>> property float x property float y property float z property uchar
>>> red property uchar green property uchar blue element face 0 property
>>> list uchar int vertex_indices end_header
>>>
>>>
>>>
>>> I'm using vtk 6.3.
>>>
>>>
>>>
>>> If someone has already meet this problem or know the solution ...
>>>
>>>
>>>
>>> Thanks for your time,
>>>
>>> Best regards,
>>>
>>>
>>>
>>> David MOUSSAUD.
>>>
>>>
>>> _______________________________________________
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>>>
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>>
>>
>>
>> --
>> Cory Quammen
>> R&D Engineer
>> Kitware, Inc.
>
>
>
> --
> Cory Quammen
> R&D Engineer
> Kitware, Inc.
--
Cory Quammen
R&D Engineer
Kitware, Inc.
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