[vtkusers] Segmentation Fault in vtkPointLocator::BuildLocator

[Jean-Marie Normand]

Hi,
I've just added in my code a new class that uses vtkPointLocator, the
compilation step is ok, but at runtime I get a segmentation fault:

#0  0x008ef798 in vtkPointLocator::BuildLocator () from
/usr/local/lib/vtk/libvtkCommon.so

This is the part of code where it crashes:
locator = vtkPointLocator::New();
this->locator->SetDataSet( this->input );
this->locator->AutomaticOff();
this->locator->SetMaxLevel( 5 );
this->locator->BuildLocator(); //! Here is the seg fault

where this->input is a vtkPolyData* obtained via a vtkAppendPolyData. It
seems that the crash may be linked with the input.

But one thing is when I try to check the number of vertices of my
vtkPolyData  (by calling appUnClipped->GetOutput()->GetNumberOfPoints() 
appUnClipped being a vtkAppendPolyData) I get 0 as an answer, whereas
when I declare a mapper, an actor and that I render the actor, I see the
right surface. Is this normal ?

Has anyone got a clue ?
 
Thanks in advance.


Jim