using UnityEngine;
using System.Collections;
 
//Add this script to the platform you want to move.
//左右移動的平臺
public class MovingPlatform : MonoBehaviour {
 
 //Platform movement speed.平臺移動速度
 public float speed;
 
 //This is the position where the platform will move.平臺移動的位置
 public Transform MovePosition;//創(chuàng)建一個(gè)空物體作為移動的位置
 
 private Vector3 StartPosition;
 private Vector3 EndPosition;
 private bool OnTheMove;
 
 // Use this for initialization
 void Start () {
 //Store the start and the end position. Platform will move between these two points.儲存左右兩端點(diǎn)位置
 StartPosition = this.transform.position;
 EndPosition = MovePosition.position;
 }
 
 void FixedUpdate () {
 
 float step = speed * Time.deltaTime;
 
 if (OnTheMove == false) {
 this.transform.position = Vector3.MoveTowards (this.transform.position, EndPosition, step);
 }else{
 this.transform.position = Vector3.MoveTowards (this.transform.position, StartPosition, step);
 }
 
 //When the platform reaches end. Start to go into other direction.
 if (this.transform.position.x == EndPosition.x && this.transform.position.y == EndPosition.y && OnTheMove == false) {
 OnTheMove = true;
 }else if (this.transform.position.x == StartPosition.x && this.transform.position.y == StartPosition.y && OnTheMove == true) {
 OnTheMove = false;
 }
 } 
 
}