void FemPostDataAlongLineFilter::GetAxisData() {

    std::vector<double> coords;
    std::vector<double> values;

    vtkSmartPointer<vtkDataObject> data = m_probe->GetOutputDataObject(0);
    vtkDataSet* dset = vtkDataSet::SafeDownCast(data);
    vtkDataArray* pdata = dset->GetPointData()->GetArray(PlotData.getValue());
    vtkDataArray *tcoords = dset->GetPointData()->GetTCoords("Texture Coordinates");

    int component = 0;

    const Base::Vector3d& vec1 = Point1.getValue();
    const Base::Vector3d& vec2 = Point2.getValue();
    const Base::Vector3d diff = vec1 - vec2;
    double Len = diff.Length();

    for(int i=0; i<dset->GetNumberOfPoints(); ++i) {

        double value = 0;
        if(pdata->GetNumberOfComponents() == 1)
            value = pdata->GetComponent(i, component);
        else {
            for(int j=0; j<pdata->GetNumberOfComponents(); ++j)
                value += std::pow(pdata->GetComponent(i, j),2);

            value = std::sqrt(value);
        }
        values.push_back(value);
        double tcoord = tcoords->GetComponent(i, component);
        coords.push_back(tcoord*Len);
    }
    YAxisData.setValues(values);
    XAxisData.setValues(coords);
}