VTK Problems vtkPolyData::GetScalarFieldCriticalIndex

Development
1

Help! What am I doing wrong?

Java code:

    vtkPolyData pd = new vtkPolyData();

    vtkPoints points = new vtkPoints();
    points.InsertNextPoint(0, 0, 0);
    points.InsertNextPoint(5, 0, 0);
    points.InsertNextPoint(5, 5, 0);
    points.InsertNextPoint(0, 5, 0);
    points.InsertNextPoint(2.5, 2.5, 0);

    vtkDoubleArray da = new vtkDoubleArray();
    da.InsertNextValue(0);
    da.InsertNextValue(0);
    da.InsertNextValue(0);
    da.InsertNextValue(0);
    da.InsertNextValue(1);

    pd.SetPoints(points);
    pd.GetPointData().addArray(da);

    for (int i = 0; i < points.GetNumberOfPoints(); i++) {
        System.out.println(pd.GetScalarFieldCriticalIndex(i, 0));
    }

out:
-3
-3
-3
-3
-3