[vtkusers] vtkCurvatures

[Ismail Elkhrachy]

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