Function discretize_planar 

pub fn discretize_planar(
    curve: &PlanarCurve,
    range: (f64, f64),
    deflection: Deflection,
    tol: Tolerances,
) -> OgeomResult<(Vec<Point2>, Vec<f64>)>

Approximate a planar curve in a surface’s parameter space.

The deflection is measured in parameter units here, not in space, so a caller wanting a spatial tolerance has to convert through the surface’s own scale: the two differ by orders of magnitude near a pole; discretize_on_surface is the version that measures through the surface. This exists for boundary work in parameter space; for a face’s actual boundary, discretize the edge’s 3D curve and evaluate the pcurve at those parameters instead, which is what keeps adjacent faces watertight.

Errors

As discretize.