public void InitObjet(Vector3 pos, Quaternion q, string kartName)
{
GameObject kart = GameObject.Instantiate(Resources.Load(kartName), pos, q) as GameObject;
//GameObject kart_angles = GameObject.Instantiate (Resources.Load("GameplayObject"), pos, q) as GameObject;
kart.name = kart.name.Split('(')[0];
kc = kart.GetComponent <KartController>();
kart_script = kart.GetComponent <KartScript>();
kart_script.SetKart(this);
kc.setCoefficients(speedCoeff, turnCoeff);
//kart_angles.GetComponent<Gameplay> ().SetKart (kart.transform);
}