Function intersect_analytic_analytic_bounded 

pub fn intersect_analytic_analytic_bounded(
    a: AnalyticSurface<'_>,
    b: AnalyticSurface<'_>,
    grid_res: usize,
    v_range_hint_a: Option<(f64, f64)>,
    v_range_hint_b: Option<(f64, f64)>,
) -> Result<Vec<IntersectionCurve>, MathError>

Intersect two analytic surfaces with optional v-range overrides.

When v_range_hint_a or v_range_hint_b is Some((min, max)), the marching algorithm searches that v-range instead of the hardcoded default. This is essential for cylinders and cones whose default v-range is small (-1..1 or 0.01..2) but whose actual face may extend much further.

Errors

Returns MathError if algebraic intersection fails or marching diverges.