public void setBVH(ssBVH <int> bvh) { _bvh = bvh; }
public void setBVH(ssBVH <UInt16> bvh) { _bvh = bvh; }
public BVH(List <IHitable> world) { theBVH = new ssBVH <IHitable>(new IHitableBVHNodeAdaptor(), world); }