[vtkusers] Can you help with this please?

[Bill Lorensen]

The resulting triangle do not have normals so changing the shading
interpolation won't help. What is the source and precision of the
original points?


On Wed, Jan 28, 2015 at 7:59 AM,  <soleimani1639 at gmail.com> wrote:
> Hi Bill,
>
> I am trying to make a model of human chest. I have some points of the chest that I send you the link (first link). I have used vtkDelaunay2D to put a surface on the points but the surface is not smooth. I used "SetInterpolationToPhong" property as well, but it did not worked for me. It seems that the results form Phong has no difference from Flat !!!!
> Also I have used "vtkSurfaceReconstructionFilter", but it modify the points position very much and I don't want this much of modification.
> I have copied my code at the end of the email.
>
> I appreciate if you can help me with this (to have a smooth surface).
>
> Cheers,
> Vahid
>
> points of the chest:
> https://drive.google.com/open?id=0BxUVE0cBp62XazgwWWJsMFFpa28&authuser=0
>
> vtkDelaunay2D model:
> https://drive.google.com/open?id=0BxUVE0cBp62Xc3pyeFQ0Zmh5MGM&authuser=0
>
>
>   int main(int, char *[])
> {
>
>   vtkSmartPointer<vtkPoints> points =
>     vtkSmartPointer<vtkPoints>::New();
>
>   int  widthOffset = 241 , heightOffset = 178;
>
>   readPoints(points, "extra_files/depth_chest19.png", heightOffset, widthOffset);
>
>   vtkSmartPointer<vtkPolyData> polydata =
>     vtkSmartPointer<vtkPolyData>::New();
>   polydata->SetPoints(points);
>
>   // Triangulate the grid points
>   vtkSmartPointer<vtkDelaunay2D> delaunay =
>    vtkSmartPointer<vtkDelaunay2D>::New();
>   delaunay->SetInputData(polydata);
>   delaunay->Update();
>
>   // Visualize
>   vtkSmartPointer<vtkPolyDataMapper> meshMapper =
>     vtkSmartPointer<vtkPolyDataMapper>::New();
>   meshMapper->SetInputConnection(delaunay->GetOutputPort());
>
>   vtkSmartPointer<vtkActor> meshActor =
>     vtkSmartPointer<vtkActor>::New();
>   meshActor->SetMapper(meshMapper);
>   //meshActor->GetProperty()->SetEdgeColor(0,0,1); // Why aren't the edges aren't visible unless we set the representation to wireframe?
>   //meshActor->GetProperty()->EdgeVisibilityOn();
>   //meshActor->GetProperty()->SetDiffuseColor(0.0, 0.4, 0.8);
>   //meshActor->GetProperty()->SetInterpolationToFlat();
>   //meshActor->GetProperty()->SetRepresentationToWireframe();
>   //meshActor->GetProperty()->SetInterpolationToGouraud();
>   meshActor->GetProperty()->SetInterpolationToPhong();
>
>   // Create a renderer, render window, and interactor
>   vtkSmartPointer<vtkRenderer> renderer =
>     vtkSmartPointer<vtkRenderer>::New();
>   vtkSmartPointer<vtkRenderWindow> renderWindow =
>     vtkSmartPointer<vtkRenderWindow>::New();
>   renderWindow->AddRenderer(renderer);
>   renderWindow->SetSize(600,600);
>   renderWindow->SetPosition(600,200);
>
>
>   vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
>     vtkSmartPointer<vtkRenderWindowInteractor>::New();
>   renderWindowInteractor->SetRenderWindow(renderWindow);
>
>   vtkSmartPointer<MyInteractorStyle> mystyle =
>     vtkSmartPointer<MyInteractorStyle>::New();
>   mystyle->SetActor(meshActor);
>
>   renderWindowInteractor->SetInteractorStyle( mystyle );
>
>
>   // Add the actor to the scene
>   renderer->AddActor(meshActor);
>   //renderer->AddActor(boundaryActor);
>   renderer->SetBackground(.0, .1, .0); // Background color green
>
>   // Render and interact
>   renderWindow->Render();
>   renderWindow->SetWindowName("Chest wall: wired-form (denoised with gaussian filter)");
>   renderWindowInteractor->Start();
>
>   return EXIT_SUCCESS;
> }
>
> _____________________________________
> Sent from http://vtk.1045678.n5.nabble.com
>



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