[vtkusers] Problem: vtkcontourfilter and vtkcelllocator

[Luke Hua]

I tried to set the output of vtkContourFilter to vtkCellLocator, but got error  "No cells to subdivide". I checked the source it seams the output dataset vtkContourFilter has 0 number of cells. What's wrong?
 
this->cont=vtkContourFilter::New();
  cont->SetInput(vol);
  cont->SetValue(0,30);
  cont->SetNumberOfContours(1);
 
  vtkCellLocator *cellLocator = vtkCellLocator::New();
  cellLocator->SetDataSet(cont->GetOutput());
  cellLocator->BuildLocator();

 
 


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