[vtkusers] vtkPointLocator seg faults at BuildLocator

[Chris Turner]

Hi David,

Thanks for you reply. I'm using VTK 5.4.2.

And adding the lines:
  pointLocator.AutomaticOn();
  pointLocator.SetNumberOfPointsPerBucket(2);

didn't help.

I think it's probably my surface model. Do I have to specially prepare
the model before I can use the PointLocator?

Thanks
Chris


On Thu, Aug 26, 2010 at 12:03 PM, David Doria <daviddoria+vtk at gmail.com> wrote:
> On Thu, Aug 26, 2010 at 11:51 AM, Chris Turner
> <cturnercomplex at googlemail.com> wrote:
>> Hi Everyone,
>>
>> when I try to use the vtkPointLocator on a vtkPolyData my program seg
>> faults when ever I call BuildLocator:
>>
>> Here is the code:
>>
>>    pd=vtk.vtkPolyData()
>>    pd.DeepCopy(polyData_org)
>>    pointLocator=vtk.vtkPointLocator()
>>    pointLocator.SetDataSet(pd)
>>    print "before BuildLocator"
>>    sys.stdout.flush()
>>    pointLocator.BuildLocator()
>>    print "after BuildLocator"
>>    sys.stdout.flush()
>>    id = pointLocator.FindClosestPoint(pt[0],pt[1],pt[2])
>>
>> Here is the backtrace:
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x00007f21ab328c40 in vtkIdList::InsertNextId (this=0x40011,
>> vtkid=33286) at /VTK/Common/vtkIdList.h:122
>> 122       if ( this->NumberOfIds >= this->Size )
>> (gdb) bt
>> #0  0x00007f21ab328c40 in vtkIdList::InsertNextId (this=0x40011,
>> vtkid=33286) at /VTK/Common/vtkIdList.h:122
>> #1  0x00007f21a5b47cf6 in vtkPointLocator::BuildLocator
>> (this=0xc1ac470) at /VTK/Filtering/vtkPointLocator.cxx:1013
>> #2  0x00007f21a67ca7c8 in vtkPointLocatorCppCommand (op=0xc1ac470,
>> interp=0x15eb9b0, argc=2, argv=0x7fff2a29f410)
>>
>>
>> Anybody an idea?
>>
>>
>> Thanks,
>> Chris
>
> Does this work?
>
> http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/PointLocator_Radius
>
> Which version of VTK are you using?
>
> David
>