Function cast_local_ray 

pub fn cast_local_ray<G: ?Sized + SupportMap>(
    shape: &G,
    simplex: &mut VoronoiSimplex,
    ray: &Ray,
    max_time_of_impact: f64,
) -> Option<(f64, Vector<f64>)>

Casts a ray on a support map using the GJK algorithm.