[vtkusers] Get number of cells

[Isidro Moreno]

Hi! Here's the situation:

vtkLineSource *line->vtkLineSource::New();
vtkPolyData *polydata->vtkPolyData::New();
...
...
polydata=line->GetOutput();
int nofc;
nofc=polydata->GetNumberOfCells();

1st) Why "GetNumberOfCells()" returns 0 ? ("line" it's just a straight line).
2st) polydata=line->GetOutput(): Is it the correct way to copy vtkPolyData? I've tried ShallowCopy() and DeepCopy(), but nothing happened.

I'm using vtk 5.0, thanks everybody!!
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