[vtkusers] problem with vtkDijkstraGraphGeodesicPath() and vtkXMLPolyDataReader output

[superzz]

Hello Karthik 
Can you tell me how to run TestDijkstraGraphGeodesicPath?
I run it with the command "WidgetsCxxTests.exe TestDijkstraGraphGeodesicPath
13". But it tells me dbgdel.cpp#line 52,
"_BLOCK_TYPE_IS_VALID)(pHead->nBlockUse)".

Thanks

superZZ


Karthik Krishnan-2 wrote:
> 
> You need to post the polydata that you have. You've mentioned yourself
> that it does work with the sphere source. So there must be an issue
> with your data that results in no path being found between the source
> and end vertex. Perhaps  you can try to run a connectivity filter on
> the dataset to see if one can indeed traverse on the edges between the
> two vertices.
> 
> This class is tested on terrain polydata and used to draw
> interactively on polygonal datsets. See
> TestDijkstraGraphGeodesicPath.cxx . There are no known issues with it.
> 
> 
> --
> karthik
> 
> On Tue, Oct 20, 2009 at 5:45 AM, RimAY <rim.ayari at gmail.com> wrote:
>>
>> Dear All ,
>>
>> I try to get the shortest path  between two cell in a vtk image, then
>> trace
>> it with vtkTubeFilter(). I read the vtk file and get the output of the
>> vtkXMLPolyDataReader(). then I choose two cell: start_point and end_point
>> to
>> find the shortest path  between them. My problem is that I got always the
>> error:
>>
>> vtkTubeFilter (0F432C08): Less than two points in line! or
>>
>> I use the same code with the vtkSphereSource output and it work.
>> this is a part of my code:
>>
>> readerVTK = vtkXMLPolyDataReader()
>> readerVTK.SetFileName("file")
>> readerVTK.Update()
>>
>> data = vtkPolyData()
>> data = readerVTK.GetOutput()
>> data.Update()
>>
>> geodesic = vtk.vtkDijkstraGraphGeodesicPath()
>> geodesic.SetInput(data)
>> geodesic.SetStartVertex( start_point )
>> geodesic.SetEndVertex( end_point )
>> geodesic.Update()
>>
>> points = vtkPolyData()
>> points = geodesic.GetOutput()
>>
>> tube = vtk.vtkTubeFilter()
>> tube.SetInput(points)
>> tube.SetRadius(1.5)
>> tube.Update()
>>
>> tubeMapper = vtkPolyDataMapper()
>> tubeMapper.SetInputConnection(tube.GetOutputPort())
>>
>>
>> Any help will be very appreciated
>> Best Regards
>>
>>
>>
>>
>>
>> --
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>> Sent from the VTK - Users mailing list archive at Nabble.com.
>>
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