Evaluate distance along a (curved) line

somebody recently asked for a snippet to compute the distance between two points along a curved line (a "wire body" Entity).
import XCoreModeling import XCoreMath Vec3 = XCoreModeling.Vec3 Body = XCoreModeling.Body def geodesic_distance_curve(wire_body: Body, p1: Vec3, p2: Vec3): wires = XCoreModeling.GetWires(wire_body) assert len(wires) == 1 curve = wires[0].GetGeometry(transform_to_model_space=True) u1 = curve.MinDistParameter(p1) u2 = curve.MinDistParameter(p2) return abs(curve.Length(u1, u2))
And here is an example how to use it:
if __name__ == "__main__": ent = XCoreModeling.CreateSpline([Vec3(0), Vec3(1, 1, 0), Vec3(2, 0, 0), Vec3(3, 1, 0), Vec3(4, 0, 0)]) d = geodesic_distance_curve(ent, Vec3(1, 1, 0), Vec3(3, 1, 0)) print(f"{d} != 2")