public CharacterController player;
public GameObject _camera;
private float speed = 10.0f;
private float JSpeed = 10.0f;
private float RDist;
private float LDist;
public KeyCode right;
public KeyCode left;
public KeyCode jump;
public Transform _right;
public Transform _left;
private bool canGoRight = true;
private bool canGoLeft = true;
//    private bool canGo = true;
private Vector3 MoveDir = Vector3.zero;
private float Gravity = 20.0F;
void Update(){

if (player.isGrounded) {
MoveDir = new Vector3 (0, Input.GetAxis ("Vertical"), 0);
MoveDir = transform.TransformDirection (MoveDir);
MoveDir *= speed;
if (Input.GetKeyDown (jump))
MoveDir.y = JSpeed;
}
MoveDir.y -= Gravity * Time.deltaTime;
player.Move (MoveDir * Time.deltaTime);

_camera.transform.position += Vector3.right * speed * Time.deltaTime;
player.transform.position += player.transform.forward * speed * Time.deltaTime;

if (Input.GetKeyDown(right) & canGoRight == true) {
player.transform.position += player.transform.right * 4;
}

if (Input.GetKeyDown(left) & canGoLeft == true) {
player.transform.position -= player.transform.right * 4;
}
//left , right
RaycastHit hit;
//left
Vector3 direction = _left.TransformDirection (Vector3.forward);
if(Physics.Raycast (_left.position,direction,out hit,100000.0f)){
LDist = hit.distance;
}
Vector3 direction2 = _right.TransformDirection (-Vector3.forward);
if(Physics.Raycast (_right.position,direction2,out hit,100000.0f)){
RDist = hit.distance;
}
if (LDist < 0.6F) {
canGoLeft = false;
} else {
canGoLeft = true;
}
if (RDist < 0.6F) {
canGoRight = false;
}
else {
canGoRight = true;
}
}
}