using UnityEngine;
using System.Collections;

public class Run : MonoBehaviour {
public int run_speed;
public GameObject player;

// Use this for initialization
void Start ()
{
player = (GameObject)this.gameObject;
}

// Update is called once per frame
void Update ()
{
if(Input.GetKey(KeyCode.W) & Input.GetKey(KeyCode.LeftShift))
{
player.transform.position += player.transform.forward * run_speed * Time.deltaTime;
}
}
}

var controller : CharacterController;  //Указываем игрока
      var oldHeight;      
      var newHeight: float;      
      var newPos;     
      var bf : boolean = false;      

      function Start () {      
      controller = GetComponent(CharacterController);    //Находим компонент CharacterController
      oldHeight = controller.height;      
      }      

     function Update() {         
     newPos = new Vector3(transform.position.x, transform.position.y + 0.7f, transform.position.z);     
                if (Input.GetKey(KeyCode.LeftControl)) {     
                    controller.height = newHeight;     
                    bf = true;     
                } else {     
                if (Input.GetKeyUp (KeyCode.LeftControl) && !Physics.Raycast (transform.position, Vector2.up)) {     
                    controller.height = oldHeight;     
                    transform.position = newPos;     
                    bf = false;     
                } else {     
                if (bf == true && !Physics.Raycast (transform.position, Vector2.up)) {     
                controller.height = oldHeight;     
                    transform.position = newPos;     
                    bf = false;     
                }     
                }     
                }     
     }