[vtkusers] Rendering more than one actor problem

[Ken Martin]

Try yanking this line


 edges_mapper->SetResolveCoincidentTopologyPolygonOffsetParameters(1,
1);



On Thu, Mar 15, 2018 at 2:09 PM, ZACK <chihebz at hotmail.com> wrote:

> Hi Ken Martin,
>
> Thank you for your advice. I did look at new vtk example and I did not see
> that I am doing something wrong! My project is still working fine under
> vtk5.4 but not with the latest vtk version. Please take a look at the code
> below and let me know if you notice something wrong. Please note that that
> I
> have two actors, if I add only one actor to the viewprop it works fine but
> not both at the same time.!!
>
> Here's the code that is working on previous 5.0 vtk version
>
>       //rendering
>          m_prenderer = vtkopenglrenderer::New();
>         m_prenWin = vtkWin32OpenGLRenderWindow::New();
>
>          //I use append filter class to add all unstructured grids data
>          m_pUnstructuredGridModel = vtkAppendFiter::New();
>
>         //...addding data
>
>         vtkSmartPointer<vtkGeometryFilter> extract =
> vtkSmartPointer<vtkGeometryFilter>::New();
>
> extract->SetInputConnection(m_pUnstructuredGridModel->GetOutputPort());
>         extract->Modified();
>
> //creating mapper
>         InitializePolyDataMapper(m_pModelPolyDataMapper);
>
> m_pModelPolyDataMapper->SetInputConnection(extract->GetOutputPort());
>         PreparePolyDataMapper(m_pModelPolyDataMapper, pColours,
> m_CurrentMinValue,
> m_CurrentMaxValue);
>
> //creating actor
>      m_pCurrentFringeActor = vtkActor::New();
>         m_pCurrentFringeActor->SetMapper(m_pModelPolyDataMapper);
>         m_pCurrentFringeActor->SetDragable(true);
>        m_pCurrentFringeActor->VisibilityOn();
>         m_prenderer->AddViewProp(m_pCurrentFringeActor);// m_prenderer is
> vtkopenglrenderer
>
> *The piece of code above does render fine, but when I try to add the code
> below for wireframe the render windows becomes empty *
>
>         vtkSmartPointer<vtkFeatureEdges> edges_extractor =
> vtkSmartPointer<vtkFeatureEdges>::New();
>         edges_extractor->SetInputConnection(extract->GetOutputPort());
>         edges_extractor->ColoringOff();
>         edges_extractor->BoundaryEdgesOn();
>         edges_extractor->ManifoldEdgesOn();
>         edges_extractor->NonManifoldEdgesOn();
>         edges_extractor->FeatureEdgesOn();
>         edges_extractor->Modified();
>
>         vtkSmartPointer<vtkPolyDataMapper> edges_mapper =
>  vtkSmartPointer<vtkPolyDataMapper>::New();
>
>         edges_mapper->SetInputConnection(edges_
> extractor->GetOutputPort());
>         edges_mapper->SetResolveCoincidentTopologyPo
> lygonOffsetParameters(1,
> 1);
>         edges_mapper->SetResolveCoincidentTopologyToPolygonOffset();
>         edges_mapper->ScalarVisibilityOff(); // coloring edges
>
>         edges_mapper->Modified();
>
>         vtkActor*  edges_actor = vtkActor::New();
>         edges_actor->SetMapper(edges_mapper);
>         edges_actor->GetProperty()->SetDiffuseColor(0, 0, 0);
>         edges_actor->GetProperty()->SetLineWidth(m_iEdgeLineWidth);
>         edges_actor->Modified();
>        edges_actor->VisibilityOn();
>
>       //rendering
>         m_prenderer->AddViewProp(edges_actor);
>         m_prenWin->Render
>
> *Note: If I render the wireframe actor (edges_actor) by itself it does work
> fine *
>
> Thanks
>
>
>
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-- 
Ken Martin PhD
Distinguished Engineer
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065

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