[vtkusers] ->Update()....what does that do?

[Giancarlo Amati]

Hello VTK users,
this might be already posted but I can't find it in the repository. So, I apologies for any duplicate.

I have these statements:

QByteArray temp = fn->toAscii(); 
char *data = temp.data();
        vtkSmartPointer<vtkPolyDataReader> drs =  vtkSmartPointer<vtkPolyDataReader>::New();
        drs->SetFileName(data);
         drs->Update();
        vtkPolyData *pd = drs->GetOutput();

where QByteArray is a QT array of byte then converted into a string and passed as input to PolyDataReader. so basically it's the path of the file .vtk (which is a polydata) I would like to load.

but the problem is that when i get to 

drs->Update();

it all crashes saying that an Unhandled expection has been generated.

I checked out around and apparently it's the standard way to read a vtk file (the one I have is ASCII format).

Any suggestion would be helpful..

Kind Regards.
Giancarlo Amati
 		 	   		  
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