[vtkusers] Get vtkPolyData from vtkMapper in vtkActor using Java API

[kent myers]

Hi Bill,
I edited my post shortly after I wrote it because I was able to get the vtkPolyData object from my actor.
However I could not find the SetInput() method for the writer, so I tried SetInputData.  This crashes the Java virtual machine.
I will try to understand your C++ code sample, but Java is very different, and it seems that not all C++ methods are exposed to Java.
Thanks for the help.Kent 


     On Saturday, May 9, 2015 12:07 PM, Bill Lorensen [via VTK] <ml-node+s1045678n5731860h13 at n5.nabble.com> wrote:
   

  Here is what I do in C++:
vtkSmartPointer<vtkActorCollection> actors =
    vtkSmartPointer<vtkActorCollection>::New();
  actors = renderer->GetActors();
  actors->InitTraversal();
  for (vtkIdType a = 0; a < actors->GetNumberOfItems(); ++a)
    {
    vtkActor * actor = actors->GetNextActor();
    vtkPolyData *pd = vtkPolyData::SafeDownCast(actor->GetMapper()->GetInput());
    vtkSmartPointer<vtkCleanPolyData> clean =
      vtkSmartPointer<vtkCleanPolyData>::New();
    clean->SetInputData(pd);
    vtkSmartPointer<vtkPolyDataNormals> normals =
      vtkSmartPointer<vtkPolyDataNormals>::New();
    normals->SetInputConnection(clean->GetOutputPort());
    normals->Update();
    vtkPolyDataMapper *mapper =
vtkPolyDataMapper::SafeDownCast(actor->GetMapper());
    mapper->SetInputData(normals->GetOutput());
    }


On Sat, May 9, 2015 at 2:48 PM, kent myers via vtkusers
<[hidden email]> wrote:
> I am trying to export a vtkPolyData object to a vtp file using
> vtkXMLPolyDataWriter.  The online VTK documentation says to use the
> writer.SetInput() method that takes a vtkPolyData object.
>
> I am having some problems with this strategy:
> 1. I can get the vtkMapper object from my vtkActor, but the vtkMapper object
> has no GetInput() method to retrieve a vtkPolyData object (or any other
> method)
> 2. vtkXMLPolyDataWriter has no SetInput() method (or any other method) to
> pass the vtkPolyData object even if I could get the vtkPolyData object.
>
> Has anyone successfully exported vtkPolyData from a Java application? If so,
> how?
>
>
>
>
>
> --
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