function Update () {
     var dir = transform.TransformDirection (Vector3.up);
    if (Physics.Raycast (transform.position, dir, 10)) {   }
}

var controller : CharacterController;
var Height_Stoia;
var Height_sidia: float = 0.5;
var newPos;
var SIDIT : boolean = false;
var potolok = false;
var n : float = 7;
var n2 : float = 4;

function Start () {
controller = GetComponent(CharacterController);
Height_Stoia = controller.height;
}

function Update() {

if (Input.GetKey(KeyCode.LeftControl) && !SIDIT) {
controller.height = Height_sidia;
SIDIT = true;
}

if (Input.GetKeyUp (KeyCode.LeftControl) && SIDIT &&
!Physics.Raycast (transform.position, transform.TransformDirection (Vector3.up), n2)) {
transform.position = new Vector3(transform.position.x, transform.position.y + n, transform.position.z);
controller.height = Height_Stoia;
SIDIT = false;
}
else {
if (Input.GetKeyUp (KeyCode.LeftControl) && SIDIT
&& Physics.Raycast (transform.position, transform.TransformDirection (Vector3.up), n2)) {
potolok = true;
return;
}
}
if(potolok && !Physics.Raycast (transform.position, transform.TransformDirection (Vector3.up), n2)){

transform.position = new Vector3(transform.position.x, transform.position.y + n, transform.position.z);
controller.height = Height_Stoia;
SIDIT = false;
potolok = false;
}
}

Height_Stoia = controller.height;
Height_sidia = controller.height/4;

function Update () {
     controller.height = Mathf.Lerp(controller.height, 1f, Time.deltaTime);
     Physics.Raycast (transform.position, -transform.up, hit, 2f);
     transform.position.y = hit.point.y + controller.height / 2; // если пивот в центре обьекта
}

var anim_1: AnimationClip;
var anim_2: AnimationClip;
var SIDIT : boolean = false;
var potolok = false;
var looch = 12;//длина луча

function Start () {
animation[anim_1.name].speed = 3;
animation[anim_1.name].wrapMode = WrapMode.Once;

animation[anim_2.name].speed = 3;
animation[anim_2.name].wrapMode = WrapMode.Once;
}

function Update() {

if (Input.GetKeyDown(KeyCode.LeftControl) && !SIDIT) {
animation.Play(anim_1.name);
SIDIT = true;
}

if (Input.GetKeyUp(KeyCode.LeftControl) && SIDIT &&
!Physics.Raycast (transform.position, transform.TransformDirection (Vector3.up), looch)) {
animation.Play(anim_2.name);
SIDIT = false;
}
else {
if (Input.GetKeyUp(KeyCode.LeftControl) && SIDIT
&& Physics.Raycast (transform.position, transform.TransformDirection (Vector3.up), looch)) {
potolok = true;
return;
}
}
if(potolok && !Physics.Raycast (transform.position, transform.TransformDirection (Vector3.up), looch)){

animation.Play(anim_2.name);
SIDIT = false;
potolok = false;
}
}