<div dir="ltr">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.</div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jan 31, 2018 at 6:17 AM, Tanja Gerasimenko <span dir="ltr"><<a href="mailto:staubchen03@gmail.com" target="_blank">staubchen03@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  

    
  
  <div text="#000000" bgcolor="#FFFFFF">
    <p><font size="+1">Hello!</font> </p>
    <p><font size="+1">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.</font></p>
    <p><font size="+1">Could you please tell me, what am I doing wrong?</font></p>
    <p><font size="+1">Thank you.<br>
      </font></p>
    <p><font size="+1"><br>
      </font></p>
    <p><font size="+1"> The code is:<br>
      </font></p>
    <p><font size="+1"> </font>vtkSmartPointer<vtkPoints> points
      = vtkSmartPointer<vtkPoints>::<wbr>New();<br>
      <br>
          points->SetNumberOfPoints(<wbr>surf_mesh.pt.size());<br>
          for (uint i=0; i<surf_mesh.pt.size(); ++i)<br>
          {<br>
              points->SetPoint(i, <a href="http://surf_mesh.pt" target="_blank">surf_mesh.pt</a>[i].x,
      <a href="http://surf_mesh.pt" target="_blank">surf_mesh.pt</a>[i].y, <a href="http://surf_mesh.pt" target="_blank">surf_mesh.pt</a>[i].z);<br>
          };<br>
      <br>
          vtkSmartPointer<vtkCellArray> polys =
      vtkSmartPointer<vtkCellArray>:<wbr>:New();<br>
      <br>
          for (uint i=0; i<surf_mesh.tr.size(); ++i)<br>
          {<br>
              polys->InsertNextCell(3);<br>
              polys->InsertCellPoint(<a href="http://surf_mesh.tr" target="_blank">surf_<wbr>mesh.tr</a>[i].p1);<br>
              polys->InsertCellPoint(<a href="http://surf_mesh.tr" target="_blank">surf_<wbr>mesh.tr</a>[i].p2);<br>
              polys->InsertCellPoint(<a href="http://surf_mesh.tr" target="_blank">surf_<wbr>mesh.tr</a>[i].p3);<br>
          };<br>
      <br>
          vtkPolyData * polydata = vtkPolyData::New();<br>
          polydata->SetPoints(points);<br>
          polydata->SetPolys(polys);<br>
      <br>
      <br>
          vtkSmartPointer<<wbr>vtkPolyDataMapper> mapper =
      vtkSmartPointer<<wbr>vtkPolyDataMapper>::New();<br>
          mapper->SetInputData(polydata)<wbr>;<br>
      <br>
          vtkSmartPointer<vtkActor> actor =
      vtkSmartPointer<vtkActor>::<wbr>New();<br>
          actor->SetMapper(mapper);<br>
          actor->GetProperty()-><wbr>SetRepresentationToSurface();<br>
          actor->GetProperty()-><wbr>SetFrontfaceCulling(0);<br>
          actor->GetProperty()-><wbr>SetBackfaceCulling(0);<br>
      <br>
      <br>
          renderer->AddActor(actor);<br>
      <br>
          renderer->ResetCamera();</p>
  </div>

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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Ken Martin PhD<div>Distinguished Engineer<br><span style="font-size:12.8px">Kitware Inc.</span><br></div><div>28 Corporate Drive<br>Clifton Park NY 12065<br><div><br></div><div><span style="font-size:10pt;font-family:Tahoma,sans-serif">This communication,
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