[vtkusers] Default view is half transparent

[Ken Martin]

If you are on OSX with Qt5 but using the old vtk QtWidget then there is a
known issue where the zbuffer doesn't work I believe. The new tk OPenGL
widget widget fixes the issue.  If you are not on OSX then it must be
something else but your code above looks fine.

On Wed, Jan 31, 2018 at 6:17 AM, Tanja Gerasimenko <staubchen03 at gmail.com>
wrote:

> Hello!
>
> I'm very new in vtk and I'm trying to visualize a triangular mesh
> describing a geometry (something like stl) with vtk and Qt. The result
> seems to be half transparent or something like that (see the picture). When
> I visualize it using Paraview it looks like as a solid. I've tried to auto
> orient normals and use ReverseSense but without success.
>
> Could you please tell me, what am I doing wrong?
>
> Thank you.
>
>
> The code is:
>
> vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
>
>     points->SetNumberOfPoints(surf_mesh.pt.size());
>     for (uint i=0; i<surf_mesh.pt.size(); ++i)
>     {
>         points->SetPoint(i, surf_mesh.pt[i].x, surf_mesh.pt[i].y,
> surf_mesh.pt[i].z);
>     };
>
>     vtkSmartPointer<vtkCellArray> polys = vtkSmartPointer<vtkCellArray>:
> :New();
>
>     for (uint i=0; i<surf_mesh.tr.size(); ++i)
>     {
>         polys->InsertNextCell(3);
>         polys->InsertCellPoint(surf_mesh.tr[i].p1);
>         polys->InsertCellPoint(surf_mesh.tr[i].p2);
>         polys->InsertCellPoint(surf_mesh.tr[i].p3);
>     };
>
>     vtkPolyData * polydata = vtkPolyData::New();
>     polydata->SetPoints(points);
>     polydata->SetPolys(polys);
>
>
>     vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<
> vtkPolyDataMapper>::New();
>     mapper->SetInputData(polydata);
>
>     vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
>     actor->SetMapper(mapper);
>     actor->GetProperty()->SetRepresentationToSurface();
>     actor->GetProperty()->SetFrontfaceCulling(0);
>     actor->GetProperty()->SetBackfaceCulling(0);
>
>
>     renderer->AddActor(actor);
>
>     renderer->ResetCamera();
>
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-- 
Ken Martin PhD
Distinguished Engineer
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065

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