virtual unsigned get_max_ray_intersections() const = 0;
virtual unsigned get_intersections(const Ray<T, D> &, SurfacePoint<T, D> *, unsigned) const = 0;
std::vector<SurfacePoint<T, D> > get_intersections(const Ray<T, D> &) const;
virtual unsigned get_max_ray_intersections() const = 0;
virtual unsigned get_intersections(const Ray<T, D> &, SurfacePoint<T, D> *, unsigned) const = 0;
std::vector<SurfacePoint<T, D> > get_intersections(const Ray<T, D> &) const;