Can you post the polygonal dataset, along with the StartVertex and EndVertex Id's that were passed onto vtkDijkstraGraphGeodesicPath<br><br>thx<br>--<br>karthik<br><br><div class="gmail_quote">On Thu, Jan 13, 2011 at 11:36 PM, Nicolas Sarrasin <span dir="ltr"><<a href="mailto:nsarrasin@phenix-systems.com">nsarrasin@phenix-systems.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff" text="#003333">
<font size="-1"><font face="Tahoma">Hi all,<br>
<br>
I'm coding an application to select edges on a vtkPolyData.<br>
<br>
For my needs, I first have to build a wireframe vtkPolyData of
the input (vtkPolyline->GetPointIds(...);
vtkCellArray->InsertNextCell(vtkPolyLine); </font></font><font size="-1"><font face="Tahoma">vtkPolyData->SetPoints(..); </font></font><font size="-1"><font face="Tahoma">vtkPolyData->SetLines(vtkCellArray);</font></font><font size="-1"><font face="Tahoma">...)<br>
<br>
This part is ok. Then I use vtkContourWidget with </font></font><font size="-1"><font face="Tahoma">vtkPolygonalSurfacePointPlacer and </font></font><font size="-1"><font face="Tahoma">vtkPolygonalSurfaceContourLineInterpolator
</font></font><font size="-1"><font face="Tahoma">:<br>
<br>
<br>
vtkSmartPointer<vtkContourWidget> contourWidget =
vtkSmartPointer<vtkContourWidget>::New();<br>
contourWidget->SetInteractor(interactor);<br>
<br>
vtkSmartPointer<vtkOrientedGlyphContourRepresentation>
rep = <br>
vtkOrientedGlyphContourRepresentation::SafeDownCast(contourWidget->GetRepresentation());<br>
rep->GetLinesProperty()->SetColor(1, 0.2, 0);<br>
rep->GetLinesProperty()->SetLineWidth(3.0);<br>
<br>
vtkSmartPointer<vtkPolygonalSurfacePointPlacer>
pointPlacer =<br>
vtkSmartPointer<vtkPolygonalSurfacePointPlacer>::New();<br>
pointPlacer->AddProp(actor);<br>
pointPlacer->GetPolys()->AddItem( my_polydata );<br>
<br>
vtkSmartPointer<vtkPolygonalSurfaceContourLineInterpolator>
interpolator =<br>
vtkSmartPointer<vtkPolygonalSurfaceContourLineInterpolator>::New();<br>
interpolator->GetPolys()->AddItem( </font></font><font size="-1"><font face="Tahoma">my_</font></font><font size="-1"><font face="Tahoma">polydata </font></font><font size="-1"><font face="Tahoma">);<br>
<br>
</font></font><font size="-1"><font face="Tahoma">rep->SetPointPlacer(pointPlacer);</font></font><br>
<font size="-1"><font face="Tahoma">
rep->SetLineInterpolator(interpolator);<br>
<br>
contourWidget->EnabledOn();<br>
<br>
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().<br>
<br>
It appears only if I the LineInterPolator is </font></font><font size="-1"><font face="Tahoma">vtkPolygonalSurfaceContourLineInterpolator.
It seems that Dijkstra can't find the path allong the lines.<br>
<br>
So I'm asking where does this comes from ?<br>
<br>
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).<br>
<br>
Is there a filter I can pass to my polydata to make it works ??<br>
<br>
Thanks by advance for helping me.<br>
<br>
Nicolas<br>
</font></font>
</div>
<br>_______________________________________________<br>
Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
<br>
Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
<br>
Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
<br>
Follow this link to subscribe/unsubscribe:<br>
<a href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><br>
<br></blockquote></div><br>