博客

其实原理很简单，就是使用组件“Nav Mesh Agent”，当到达目的地的时候设置新的目的地，具体代码如下。

using UnityEngine;
using System.Collections;


public class EnemyMovement : MonoBehaviour
{
	NavMeshAgent nav;               
	Vector3 originalPosition;
	Vector3 newPosition = Vector3.zero;
	Vector3 currentDestination = Vector3.zero;

	float waitTime = 3f;
	bool canMoving = true;        			//控制物体是否能够移动

	void Start () {
		
		nav = GetComponent <NavMeshAgent> ();

		originalPosition = transform.position;   //拿到物体初始位置
		float x = Random.Range (-10, 10);
		float z = Random.Range (-10, 10);
		newPosition = new Vector3 (originalPosition.x + x, originalPosition.y, originalPosition.z + z); //拿到物体随机得到的另一个位置

		currentDestination = newPosition;
	}
		
	void Update ()
	{
		if (canMoving) {

			nav.SetDestination (currentDestination);

			if (nav.remainingDistance < 0.5f) {       //到达目的地后暂停3s，然后切换目的地，达到来回走动的效果

				canMoving = false;
				StartCoroutine(delayCoroutine());     //停留3s再返回
			}
		}
	}

	IEnumerator delayCoroutine() {

		if (Vector3.Equals (currentDestination, newPosition)) {
			
			currentDestination = originalPosition;
		} else {
			
			currentDestination = newPosition;
		}
			
		yield return new WaitForSeconds(waitTime);
		canMoving = true;

	}

}