using UnityEngine;

using System.Collections;

//Add this script to the platform you want to move.

//左右移动的平台

public class MovingPlatform : MonoBehaviour {

//Platform movement speed.平台移动速度

public float speed;

//This is the position where the platform will move.平台移动的位置

public Transform MovePosition;//创建一个空物体作为移动的位置

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.储存左右两端点位置

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;

}

}

}

---------------------