Unity3D写雷电游戏（五）

己方的飞机控制已经初步完成了，现在要加入敌机了。

理论上应该有两种方式：

1.预先设定，就是在编辑器里在你想要的位置上加上敌方的攻击单位

2.动态生成，根据游戏进行的时间来控制敌方攻击单位的产生。

这边采用第2个方式来产生，有一些地面单位倒是可以用第一种方式来产生。

我们首先要设置一个敌机的产生位置，用空的object可以随意的定一个坐标。

using UnityEngine;
using System.Collections;

public class EnemyManager : MonoBehaviour {
    
    public GameObject m_EnemyPre;
    public Transform m_CreatePoint;
    
    //一波飞机的数量
    public const int MAX_GROUP_ENEMYS = 4;
    //两波飞机之间的时间间隔
    public float GROUP_INTERVAL = 2.0f;
    //同一波中两架飞机之间产生的间隔
    public float CREATE_INTERVAL = 0.25f;
    
    private float m_fTimeAfterOneGroup = 0.0f;
    private float m_fTimeAfterCreate = 0.0f;
    private int m_nEnemyNum = 0;
    

    // Use this for initialization
    void Start () 
    {
    
    }
    
    // Update is called once per frame
    void Update () 
    {
        m_fTimeAfterOneGroup +=Time.deltaTime;
        m_fTimeAfterCreate += Time.deltaTime;
        
        if (m_fTimeAfterOneGroup > 2.0f)
        {
            if (m_fTimeAfterCreate > 0.25f)
            {
                GameObject clone = (GameObject)Instantiate(m_EnemyPre,
                                    m_CreatePoint.position, m_CreatePoint.rotation);
                
                clone.AddComponent("MoveScript_Shake");
                m_nEnemyNum +=1;
                m_fTimeAfterCreate = 0;
            }
            
            if (m_nEnemyNum == MAX_GROUP_ENEMYS)
            {
                m_fTimeAfterOneGroup = 0.0f;
                m_nEnemyNum = 0;
            }
        }
    }
}

敌机的移动脚本，可自己再定义新的移动脚本，在创建新敌机时挂上去就好：

using UnityEngine;
using System.Collections;

public class MoveScript_Shake : MonoBehaviour {
    
    //标志左右移动方向
    private int m_nDir = 1;
    //原始位置
    private Vector3 m_OriginalPos;
    //水平移动速度
    public float m_HoriSpeed = 0.1f;
    //翻转速度
    public float m_RotSpeed = 1.0f;
    //向前移动速度
    public float m_MoveSpeed = 0.0005f;
    
    public Vector3 curScreenPos;
    
    public Vector3 LDPoint;

    // Use this for initialization
    void Start () 
    {
        m_OriginalPos = transform.position;
        LDPoint = GameObject.Find("LDPoint").transform.position;
        print (LDPoint);
    }
    
    // Update is called once per frame
    void Update () 
    {
        float relativeOffset = transform.position.x - m_OriginalPos.x;
        
        if (Mathf.Abs(relativeOffset) > 5)
        {
            m_nDir = -m_nDir;
        }
        
        transform.Translate(new Vector3(m_nDir * m_HoriSpeed, 0, m_MoveSpeed));
        
        Transform planeTrans = transform.GetChild(0).transform;
        planeTrans.Rotate(0.0f, 0.0f, -m_nDir * m_RotSpeed);
        
        
        //出屏则消除
//        curScreenPos = Camera.mainCamera.WorldToScreenPoint(transform.position);
        //print("Cur:"+curScreenPos);
        if (transform.position.z < Camera.mainCamera.transform.position.z - 10)
        {
            Destroy(this.gameObject);
        }
//        print("Cur:"+transform.position);
//        if (transform.position.z < LDPoint.z)
//        {
//            Destroy(this.gameObject);
//        }
    }
}

实现效果：