pub fn exact_pcurve_of(
curve: &Curve,
surface: &SurfaceGeometry,
tol: Tolerances,
) -> Option<PlanarCurve>Expand description
The exact pcurve of a curve lying on a surface, where the projection has
a closed form; None where it does not.
Public because the boolean’s same-domain handling needs it: two faces on one geometric surface may still carry different charts, and the other face’s boundary edges have to be spoken in this face’s parameters before they can split it.