[vtkusers] how to project curve to a planar or sample curve and get sampled points?

[just_rookie]

Hi all, 

I have used the vtkDijkstraGraphGeodesicPath class to find the shortest path between two points on a mesh, and my next step is to project the path(curve) to a planar. Is there a class or function in vtk to project curve to planar? And the other way is to sample the path(curve) and then project the sampled points to the planar, so how to sample the curve and get sampled points? Thank you in advance!‍
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