how to represent a 2d spline instead of a 3d one

Dear all,

I need to represent a spline widget in 2d. Because when i show the axial
slices with the vtkResliceImageViewer in MPR (with slices) i can get painted
in each slice the spline, and i do not have to create an observer to check
if the slice has changed to re-render the spline and update z. Is there any
way to keep the widget in each slice?

Any idea?

Thank you



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