gistfile1.rs

    let b = ncollide::shape::Ball::new(0.5f32);
    let m1 = na::Iso3::new(na::zero(), na::zero());
    let m2 = na::Iso3::new(na::Vec3::new(0.0, 10.0, 0.0), na::zero());

 let cast = ncollide::geometry::time_of_impact_internal::shape_against_shape(&m1, &na::Vec3::new(0.0, 10.0, 0.0), &b,
                                                                                 &m2, &na::zero(), &b);