Function intersect_plane_cone 

pub fn intersect_plane_cone(
    cone: &ConicalSurface,
    normal: Vec3,
    d: f64,
) -> Result<Vec<IntersectionCurve>, MathError>

Intersect a plane with a conical surface.

Like a cylinder, the cone is linear along each generatrix, so the plane equation is linear in v for each fixed u.

Errors

Returns an error if curve fitting fails.