AW: [vtkusers] vtkCurvatures

[Hendrik Belitz]

Hi Ismail,

I would suggest to swap the pipeline positions of vtkTriangleFilter und vtkDelaunay3D. Without a tesselation as produced by the latter one, I would assume that the output of your vtkTriangleFilter will be empty.

Regards
 Hendrik


>I am trying to calculate curvatures for point cloud I generated surface 
>and used
>
>I have got this error message: how can I convert cloud point data  to 
>structured data !!!
>Thanks
>
>
>vtkPolyData* polyData1 = vtkPolyData::New();
>    polyData1->SetPoints(cloud1);
>    polyData1->GetPolys();  
> 
>   
>    vtkTriangleFilter *vtf = vtkTriangleFilter::New ();
>    vtf->SetInput(polyData1);
>   
>    //Delaunay3D
>    vtkDelaunay3D *del=vtkDelaunay3D::New();
>    del->SetInput(vtf->GetOutput());
>    del->BoundingTriangulationOff();
>    del->SetTolerance(0.001);
>    del->SetAlpha(0.02);
>
>vtkCleanPolyData *cleanr = vtkCleanPolyData::New();
>    cleanr->SetInput(del->GetOutput());
>    cleanr->SetTolerance(0.005);
>   
>    //Curvatures
>    vtkCurvatures *curve1 = vtkCurvatures::New();
>    curve1->SetInput(cleanr->GetOutput());
>    curve1->SetCurvatureTypeToGaussian();
>
>ERROR: In c:\Program Files\VTK 
>5.0\VTK\Filtering\vtkDemandDrivenPipeline.cxx, line 795
>vtkStreamingDemandDrivenPipeline (0x02249080): Input for connection 
>index 0 on input port index 0 for algorithm vtkCleanPolyData(0x02248980) 
>is of type vtkUnstructuredGrid, but a vtkPolyData is required.
>
>-- 
>M.Sc. Ismail Elkhrachy
>PhD student
>
>Institut für Geodäsie und Photogrammetrie
>Technische Universität Braunschweig
>Gaußstr. 22   
>38106 Braunschweig 
>Germany
>
>Mob.           : 0049 0163 3623486
>Tel.           : 0049 0531 3917497
>Fax            : 0049 0531 3917499
>E-mail         : I.Elkhrachy at tu-bs.de, I.Elkhrachy at yahoo.com
>
>
>_______________________________________________
>This is the private VTK discussion list. 
>Please keep messages on-topic. Check the FAQ at: 
>http://www.vtk.org/Wiki/VTK_FAQ
>Follow this link to subscribe/unsubscribe:
>http://www.vtk.org/mailman/listinfo/vtkusers