[vtkusers] vtkPolyData to Qt

[Anja Ende]

Hi again,

My application is using Qt to render splines and curves on top of the vtk
window. I am using vtkParametricSpline and vtkParametricFunctionSource
classes to generate splines. When rendering with vtk the vtkPolyDataMapper
does all the rendering, I guess. Now, my question is how I can convert the
output (vtkPolyData) to polygon or line values that I can use with
QPainterPath in Qt.

The code to generate the output is simple. It is:

vtkParametricSpline * spline =vtkParametricSpline::New();
spline->SetPoints(inputPoints);
spline->ClosedOff();

vtkParametricFunctionSource * splineSource =
vtkParametricFunctionSource::New();
splineSource->SetParametricFunction(spline);
splineSource->Update();

// How to convert data as to use with Qt
vtkPolyData * data = splineSource->GetOutput();

Now, how can I convert this data array to Qt compatible array or points...

Would really appreciate some help here.

Anja
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