[vtkusers] extract real curvature data from vertices of an edge

[Billy Okal]

Hi All, 

I am trying to get the curvature information at the vertices of an edge. I have the following setup

// extract edges from the resulting curvature data 
edge_extractor_->SetInput(curvatures_);
edge_extractor_->Update();

// traverse all the edges to look for zero crossings 
for(vtkIdType i = 0; i < edge_extractor_->GetOutput()->GetNumberOfCells(); i++)
{
vtkSmartPointer<vtkLine> edge_line = vtkLine::SafeDownCast(edge_extractor_->GetOutput()->GetCell(i));

//todo, get the curvature and the vertices of this edge 
}


Where curvatures_ is PolyData that is the result of running gaussian curvature computation and edge_extractor is the simple ExtractEdge filter 

How can I get the vertices of the edge I just got as a line? and how can I then lookup the curvature values at these vertices as I need to compare these.

Thanks

Bill
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20130428/deaddb3d/attachment.htm>