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Find points along NURBS curves (contours) at specific Y values

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Hi, I want to find points along a series of NURBS curves (created using the contour node) at particular y-values. I figured I could intersect the curves with lines but this only seems to work with 2D curves. The curves are essentially 2D as they are contours and so is there a way to convert NURBS into 2D? Or is there a way to find specific points on NURBS curves that I am missing?

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