[vtkusers] problem with vtkDijkstraGraphGeodesicPath() and vtkXMLPolyDataReader output

[Karthik Krishnan]

SuperZZ:

The test runs just fine. The dashboards manage to run it every night :)

You need to run it with the extra set of arguments, given that it uses
data from VTKData etc, so one needs to supply the path where this data
is found...  This is how the test driver runs it.

Specifically, you can type on your shell:

  ctest -R TestDijkstraGraphGeodesicPath -V

The test should then run. You will also see the command line on the
terminal. If you wish to run it in "Interactive" mode, you can copy
the command line you get by invoking ctest with the verbose ("-V")
flag and add a "-I" at the end. For instance,

./bin/WidgetsCxxTests TestDijkstraGraphGeodesicPath -DistanceOffset
20.0 -T /home/karthik/Kitware/VTK/bin/VTK/Testing/Temporary -D
/home/karthik/Kitware/VTKData -V
Baseline/Widgets/TestDijkstraGraphGeodesicPath.png -I



On 12/27/09, superzz <jxdw_zlf at yahoo.com.cn> wrote:
>
> 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
>>>
>>>
>>>
>>>
>>>
>>> --
>>> View this message in context:
>>> http://www.nabble.com/problem-with-vtkDijkstraGraphGeodesicPath%28%29-and-vtkXMLPolyDataReader-output-tp25972428p25972428.html
>>> Sent from the VTK - Users mailing list archive at Nabble.com.
>>>
>>> _______________________________________________
>>> Powered by www.kitware.com
>>>
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>>
>>> Please keep messages on-topic and check the VTK FAQ at:
>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>
>>> Follow this link to subscribe/unsubscribe:
>>> http://www.vtk.org/mailman/listinfo/vtkusers
>>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.vtk.org/mailman/listinfo/vtkusers
>>
>>
>
> --
> View this message in context:
> http://old.nabble.com/problem-with-vtkDijkstraGraphGeodesicPath%28%29-and-vtkXMLPolyDataReader-output-tp25972428p26931483.html
> Sent from the VTK - Users mailing list archive at Nabble.com.
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>
_________________________________
Karthik Krishnan
Research Staff,
Kitware Inc.
Ph: +1 5188814919, +91 9538477060