Rotate any 3D curve

Grasshopper
1

Hi All,

How to rotate any 3D curve flat/parallel to XY plane.

For example, consider any line that is rotated on all planes so I would like to make it flat.

One method was pulling curve to flat surface and remove it and re scale it but what if its circle or rectangle curve rotated?

2

You could it with this steps: 1) use isplanar to get a plane on your curve 2)orient the curve with that plane