Unity3D实现飞机大战游戏(2)

//发射子弹的速率
public float rate = 0.2f;
public GameObject bullet;//子弹的类型
//发射子弹的方法
public void fire()
 {
  //初始化一个子弹预制体
  GameObject.Instantiate(bullet, transform.position, Quaternion.identity);
 }

 public void openFire(){
  //每隔多长时间使用发射子弹的方法
  InvokeRepeating("fire", 0, rate);
 }
 //ctrl+shift+m添加生命周期函数
 private void Start()
 {
  openFire();
 }

//默认血量
public int hp = 1;
//默认速度
public float speed = 2;
 // Update is called once per frame
 void Update()
 {
  //飞机向下移动
  this.transform.Translate(Vector3.down*speed*Time.deltaTime); 
  if (this.transform.position.y <= -5.6f)
  {
   Destroy(this.gameObject);
  }
 }

public int type;//表示子弹的类型 
public float speed = 1.5f;//奖励物品下落速度
// Update is called once per frame
void Update()
 {//让其进行下降
  this.transform.Translate(Vector3.down * speed * Time.deltaTime);
  //如果出了游戏边界区域以后销毁
  if (this.transform.position.y <= -4.5f)
  {
   Destroy(this.gameObject);
  }
 }

//第0号敌机
public GameObject enemy0Prefab;
//第1号敌机
public GameObject enemy1Prefab;
//第二号敌机
public GameObject enemy2Prefab;
//奖励物品的预制体
public GameObject award0Prefab;
public GameObject award1Prefab;
//敌机生成的速率
public float enemy0Rate=0.5f;
public float enemy1Rate = 5f;
public float enemy2Rate = 8f;
//奖励物品生成的速率
public float award0Rate = 7f;
public float award1Rate = 10f;
 // Start is called before the first frame update
 void Start()
 {
  InvokeRepeating("creatEnemy0", 1, enemy0Rate);
  InvokeRepeating("creatEnemy1", 5, enemy1Rate);
  InvokeRepeating("creatEnemy2", 8, enemy2Rate);
  InvokeRepeating("creatAward0", 15, award0Rate);
  InvokeRepeating("creatAward1", 18, award1Rate);
 }
 //生成第0号敌机
 //位置信息的x信息应当要随机生成
 public void creatEnemy0()
 {
  float x = Random.Range(-2.15f, 2.15f);
  Instantiate(enemy0Prefab, new Vector3(x,transform.position.y,0), Quaternion.identity);
 }

 public void creatEnemy1()
 {
  float x = Random.Range(-2f, 2f);
  Instantiate(enemy1Prefab, new Vector3(x, transform.position.y, 0), Quaternion.identity);
 }
 public void creatEnemy2()
 {
  float x = Random.Range(-1.5f, 1.5f);
  Instantiate(enemy2Prefab, new Vector3(x, transform.position.y, 0), Quaternion.identity);
 }
 public void creatAward0()
 {
  float x = Random.Range(-2f, 2f);
  Instantiate(award0Prefab, new Vector3(x, transform.position.y, 0), Quaternion.identity);
 }
 public void creatAward1()
 {
  float x = Random.Range(-2f, 2f);
  Instantiate(award1Prefab, new Vector3(x, transform.position.y, 0), Quaternion.identity);
 }