[vtkusers] Smooth shading

[Simon ESNEAULT]

Hi,

I think you need to generate the normals in order to have a proper shading.
If you add a vtkPolyDataNormals filter to your pipeline right after the
reader, it should look better (If i understand the problem properly !)
This example should help :
http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/PolyDataExtractNormals
Good luck
Simon


2014-05-15 11:10 GMT+02:00 Yoshinori KONISHI <ykoni at ari.ncl.omron.co.jp>:

> Hello all,
>
> Though I am trying to get a smooth shaded CAD object (.stl),
> the rendered image looks like that of flat shading (not smooth).
> Could anyone tell me how to correct my code ?
>
> --------------------------- (VTK 6.1.0 on Win7 64bit)
>   vtkSmartPointer<vtkSTLReader> reader =
> vtkSmartPointer<vtkSTLReader>::New();
>   reader->SetFileName(inputFilename.c_str());
>   reader->Update();
>
>   vtkSmartPointer<vtkPolyDataMapper>    cadMapper =
> vtkSmartPointer<vtkPolyDataMapper>::New();
>   cadMapper->SetInputConnection(reader->GetOutputPort());
>
>   vtkSmartPointer<vtkActor>     cadActor =
> vtkSmartPointer<vtkActor>::New();
>   cadActor->SetMapper(cadMapper);
>   cadActor->GetProperty()->SetInterpolation(VTK_GOURAUD);
>
>   vtkSmartPointer<vtkRenderer>  ren1 = vtkSmartPointer<vtkRenderer>::New();
>   ren1->AddActor(cadActor);
>   ren1->SetBackground(0.1, 0.2, 0.4);
>
>   vtkSmartPointer<vtkRenderWindow>      renWin =
> vtkSmartPointer<vtkRenderWindow>::New();
>   renWin->AddRenderer(ren1);
>   renWin->SetSize(640, 480);
> --------------------------------------
>
> Thank you.
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Simon Esneault
13 rue Vasselot
35000 Rennes, France
Tel : 06 64 61 30 94
Mail : simon.esneault at gmail.com
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