[vtkusers] Exception throw with vtkPolygonalSurfaceContourLineInterpolator

[Karthik Krishnan]

Can you post the polygonal dataset, along with the StartVertex and EndVertex
Id's that were passed onto vtkDijkstraGraphGeodesicPath

thx
--
karthik

On Thu, Jan 13, 2011 at 11:36 PM, Nicolas Sarrasin <
nsarrasin at phenix-systems.com> wrote:

>  Hi all,
>
> I'm coding an application to select edges on a vtkPolyData.
>
> For my needs, I first have to build a wireframe vtkPolyData of the input
> (vtkPolyline->GetPointIds(...); vtkCellArray->InsertNextCell(vtkPolyLine); vtkPolyData->SetPoints(..);
> vtkPolyData->SetLines(vtkCellArray);...)
>
> This part is ok. Then I use vtkContourWidget with vtkPolygonalSurfacePointPlacer
> and vtkPolygonalSurfaceContourLineInterpolator :
>
>
>     vtkSmartPointer<vtkContourWidget> contourWidget =
> vtkSmartPointer<vtkContourWidget>::New();
>     contourWidget->SetInteractor(interactor);
>
>     vtkSmartPointer<vtkOrientedGlyphContourRepresentation> rep =
>
> vtkOrientedGlyphContourRepresentation::SafeDownCast(contourWidget->GetRepresentation());
>     rep->GetLinesProperty()->SetColor(1, 0.2, 0);
>     rep->GetLinesProperty()->SetLineWidth(3.0);
>
>     vtkSmartPointer<vtkPolygonalSurfacePointPlacer> pointPlacer =
>         vtkSmartPointer<vtkPolygonalSurfacePointPlacer>::New();
>     pointPlacer->AddProp(actor);
>     pointPlacer->GetPolys()->AddItem( my_polydata );
>
>     vtkSmartPointer<vtkPolygonalSurfaceContourLineInterpolator>
> interpolator =
>         vtkSmartPointer<vtkPolygonalSurfaceContourLineInterpolator>::New();
>     interpolator->GetPolys()->AddItem( my_polydata );
>
>     rep->SetPointPlacer(pointPlacer);
>     rep->SetLineInterpolator(interpolator);
>
>     contourWidget->EnabledOn();
>
> When I pick one point it's ok but after the second picking I get an
> exception  : "vector subscript out of range" thrown in the function
> vtkDijkstraGraphGeodesicPath::TraceShortestPath().
>
> It appears only if I the LineInterPolator is vtkPolygonalSurfaceContourLineInterpolator.
> It seems that Dijkstra can't find the path allong the lines.
>
> So I'm asking where does this comes from ?
>
> When I compute a vtkpolyDataConnectivityFilter, it says me I have only one
> region, so my data is right connected (i means I have no holes on my
> polylines).
>
> Is there a filter I can pass to my polydata to make it works ??
>
> Thanks by advance for helping me.
>
> Nicolas
>
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