Function fit_projected_pcurve_within 

pub fn fit_projected_pcurve_within(
    curve: &Curve,
    range: (f64, f64),
    surface: &SurfaceGeometry,
    cap: f64,
    tol: Tolerances,
) -> OgeomResult<CappedFit>

fit_projected_pcurve_capped, with a refusal at the cap returned as the offset measured rather than as an error.

Errors

OgeomError::Construction if the projection cannot converge at all.