目录

• 前言
• 实现流程
• 1、创建项目
• 2、界面绘制
• 3、我方飞机
• 4、敌方飞机
• 5、子弹及碰撞检测
•  总结

前言

此文主要基于C#制作一个飞机大战游戏，重温经典的同时亦可学习。

实现流程

1、创建项目

打开Visual Studio，右侧选择创建新项目。

搜索框输入winform，选择windows窗体应用，填写对应的保存路径点击下一步，创建成功后如下图，会有一个默认打开的Form窗体。

2、界面绘制

准备对应的素材(飞机、子弹、音效等)，通过Icon以及窗体Text属性修改窗体图标以及标题显示；同时配置StartPosition属性值为CenterScreen，让窗体默认居中显示。

双击窗体生成窗体加载事件并定义函数对背景进行初始化。

使用Random产生随机数，从资源中获取图片设置为窗体背景。

复制
        private const int PLANE_OFFSET = 2;       //设置每次定时器触发时图片发生偏移的速度
        
        private int pix_x = 0;
        private int pix_y = 0;         //背景图片移动起始的坐标int shot_y = 10;int blood_y = 50;private Image[] bgrounds;        //设置多张背景图片，每次运行程序随机产生背景图片int index = 0;                           //背景图片索引
        Image avatar = Resource.imgHeadSheep;     //角色头像图片
        Image boomImg = Resource.bomb4;          //爆炸效果图片
        Image shotImg = Resource.shotgun;
        Image bloodImg = Resource.bloodbox;
 
        bool isDropGun = false;      //是否产生shotgun的标志bool isDropBox = false;       //是否产生bloodbox的标志
 
        private void Form1_Load(object sender, EventArgs e)//窗体加载事件
        {
            InitBackground();              //初始化背景
        }
 
        public GameForm()
        {
            InitializeComponent();
            this.Size = new Size(420, 630);//让窗体与图片一样大//this.DoubleBuffered = true; //双缓冲区
        }
         ///<summary>/// 初始化背景，随机生成背景图片/// </summary>public void InitBackground()
        {
            bgrounds = new Image[4];
            Random rd = new Random();
            index = rd.Next(0, 4);//产生0-3的随机数，表示不同背景
            bgrounds[0] = Resource.background1;//从资源获取图片
            bgrounds[1] = Resource.background2;
            bgrounds[2] = Resource.background3;
            bgrounds[3] = Resource.background4;
        }

新建一个背景移动函数，通过定时位置让图片发生偏移，防止有空白。

复制
/// <summary>
/// 背景移动函数
/// </summary>
/// <param name="e">图形对象</param>
public void BackMove(Graphics e)//通过定时位置让图片发生偏移，防止有空白
{
    e = this.CreateGraphics();
    pix_y += PLANE_OFFSET;
    if (pix_y > 630)
    {
        pix_y = 0;
    }
}

通过工具箱拖拽两个定时器到窗体上并设置定时器事件，用于定时生成血包以及强化弹药。

复制
/// <summary>
/// 设置定时器1事件
/// </summary>
private void timer1_Tick(object sender, EventArgs e)
{
    this.Invalidate();  //使当前窗口无效，系统自动调用OnPaint()函数重绘
}
 
/// <summary>
/// 设置定时器2事件
/// </summary>
private void timer2_Tick(object sender, EventArgs e)
{
    Graphics g = this.CreateGraphics();
    for (int j = 0; j < Fighter.fighters.Count; j++)
    {
        if (Fighter.fighters[j].flag)
        {
            g.DrawImage(boomImg, Fighter.fighters[j].GetLoc());
            SoundPlayer music = new SoundPlayer(Resource.BOMB21);
            music.Play(); 
            Fighter.fighters.Remove(Fighter.fighters[j]);
        }
    }
}

通过Graphics类绘制游戏界面，Graphics类作用为封装一个GDI+绘图图画，效果如下。

复制
/// <summary>
/// 绘制游戏界面
/// </summary>
/// <param name="g"></param>
private void DrawGame(Graphics g)                    
{
    this.BackMove(g);               
    g.DrawImage(bgrounds[index], pix_x, pix_y, 420, 630);           
    g.DrawImage(bgrounds[index], pix_x, pix_y - 630, 420, 630);       //绘制背景
 
    g.DrawImage(avatar, 10, 10);                                            //绘制角色头像
    g.DrawRectangle(new Pen(Color.Black), new Rectangle(10, 100, 100, 10));     //绘制血条矩形
    g.FillRectangle(Brushes.Red, 10, 101, MyPlane.health, 9);                   //填充血条矩形
 
    g.DrawRectangle(new Pen(Color.Blue), new Rectangle(10, 120, 100, 10));
    g.FillRectangle(Brushes.Green, 11, 121, MyPlane.score, 9);
    g.DrawString("Player：摔跤猫子", new Font("宋体", 9, FontStyle.Bold), Brushes.Yellow, new Point(10, 140));      //显示玩家
    g.DrawString("Score：" + MyPlane.score, new Font("宋体", 9, FontStyle.Bold), Brushes.Yellow, new Point(10, 160));      //显示分数
}

3、我方飞机

创建一个MyPlane实体类，定义字段如下。

复制
		public static int x = 180;
        public static int y = 530;//坐标public static int health = 100; //血量
        
        private const int PLANE_OFFSET = 12;//移动速度
        
        public static Image myPlaneImg=Resource.plane;//我方飞机图片static List<Keys> keys = new List<Keys>();//键盘键列表，用于控制飞机移动static Image gameOver = Resource.gameover;
 
        public static bool isGetGun = false;//是否得到shotgun的标志public static bool isGetBlood = false;//是否得到bloodbox的标志public static bool isGameOver = false; //游戏是否结束的标志public static int score = 0;      //得分

调用Graphics类的DrawImage函数显示我方飞机。

复制
/// <summary>
/// 显示我方飞机
/// </summary>
/// <param name="g"></param>
public static void MyPlaneShow(Graphics g)
{
    if (health > 0)
    {
        g.DrawImage(myPlaneImg, x, y);
    }
    else if (health <= 0 || score <= 0)
    {
        isGameOver = true;
        g.DrawImage(myPlaneImg, 0, -300);
        g.DrawImage(gameOver, 10, 260);
    }
    else if (isGetBlood && health <= 90)
    {
        health += 10;
    }
}

通过Keys类定义键盘事件函数。

这里先用熟悉的WASD键来控制我方飞机移动。

复制
/// <summary>
/// 显示我方飞机
/// </summary>
/// <param name="g"></param>
public static void MyPlaneShow(Graphics g)
{
    if (health > 0)
    {
        g.DrawImage(myPlaneImg, x, y);
    }
    else if (health <= 0 || score <= 0)
    {
        isGameOver = true;
        g.DrawImage(myPlaneImg, 0, -300);
        g.DrawImage(gameOver, 10, 260);
    }
    else if (isGetBlood && health <= 90)
    {
        health += 10;
    }
}
 
/// <summary>
/// 松开键盘键
/// </summary>
/// <param name="key"></param>
public static void Keyup(Keys key)
{
    keys.Remove(key);
}
 
/// <summary>
/// 按下键盘键
/// </summary>
/// <param name="key"></param>
public static void Keydown(Keys key)
{
    if (!keys.Contains(key))
    {
        keys.Add(key);
    }
}
 
/// <summary>
/// 判断按键是否被按下
/// </summary>
/// <param name="key"></param>
/// <returns>是则返回true  不是则返回false</returns>
public static bool IsKeyDown(Keys key)
{
    return keys.Contains(key);
}
 
/// <summary>
/// 用键盘控制我方飞机移动
/// </summary>
public static void MyPlaneMove()
{
    if(isGameOver)
    {
        return;
    }
    if (IsKeyDown(Keys.A))
    {
        myPlaneImg = Resource.planeLeft;
        if (x < 5)
            x = 5;
        x -= PLANE_OFFSET;
    }
    if (IsKeyDown(Keys.D))
    {
        myPlaneImg = Resource.planeRight;
        if (x > 370)
            x = 370;
        x += PLANE_OFFSET;
    }
    if (IsKeyDown(Keys.W))
    {
        if (y < 5)
            y = 5;
        y -= PLANE_OFFSET;
    }
    if (IsKeyDown(Keys.S))
    {
        if (y > 530)
            y = 530;
        y += PLANE_OFFSET;
    }
}

4、敌方飞机

创建一个Fighter实体类，定义字段如下。

复制
Image redImg;
Image greenImg;
Image yellowImg;
public Image fighterImg;//敌机图片
private const int FIGHTER_OFFSET = 4;//敌机图片移动速度
public int _x = 0;
public int _y = 0;//敌机图片移动起始的坐标
public static List<Fighter> fighters = new List<Fighter>();//敌机对象列表
private int fi;//敌机图片索引
List<Image> imgList = new List<Image>();//敌机图片列表
public bool flag = false;//碰撞的标志

通过Random产生随机数，用于定义随机出现的敌机x以及y点坐标。

复制
/// <summary>
/// 随机产生敌机
/// </summary>
public static void ProduceFighter()
{
    Random rad = new Random();
    if (rad.Next(18) == 0)
    {
        Fighter f = new Fighter(rad.Next(0, 350), rad.Next(0, 3));
        fighters.Add(f);
    }
}
 
public Fighter(int x,int i)
{
	   _x = x;//横坐标
	   fi = i;
	   redImg = Resource.fighterRed;
	   greenImg = Resource.fighterGreen;
	   yellowImg = Resource.fighterYellow;
	   switch (fi)
	   {
	       case 0:
	           fighterImg = redImg;break;
	       case 1:
	           fighterImg = greenImg;break;
	       case 2:
	           fighterImg = yellowImg;break;
	       default:
	           break;
	   }
	   imgList.Add(redImg);
	   imgList.Add(greenImg);
	   imgList.Add(yellowImg);
}

通过Graphics绘制敌机图片。

复制
/// <summary>
/// 出现敌机
/// </summary>
public void FighterShow(Graphics g)
{
   g.DrawImage(fighterImg,_x,_y);
}
 
public void fMove()
{
    _y += FIGHTER_OFFSET;
}
 
/// <summary>
/// 敌机移动函数
/// </summary>
public static void FighterMove(Graphics g)//通过定时位置让图片发生偏移
{
    for (int i = 0; i < fighters.Count; i++)
    {
        fighters[i].FighterShow(g);
        fighters[i].fMove();
        if (fighters[i]._y > 650)
        {
            fighters.Remove(fighters[i]);
        }
    }
}

5、子弹及碰撞检测

创建一个MyBullet实体类，定义字段如下。

复制
private int x;//子弹横坐标
private int y;//子弹纵坐标
private const int BULLET_OFFSET = 18;//移动速度
public int Angle;//子弹角度
private Image bulImg;//定义子弹图片
private const double PI = Math.PI;
public static List<MyBullet> mybulList = new List<MyBullet>();//子弹对象集合
 
static Bitmap bm = new Bitmap(Resource.bomb4);//爆炸图片
public bool isHit = false;//碰撞的标志

通过按键盘J键来产生我方子弹

复制
  /// <summary>/// 通过按键盘J键来产生我方子弹/// </summary>public static void ProduceMybul()
  {
      if (!MyPlane.isGameOver && MyPlane.IsKeyDown(Keys.J))
      {
          mybulList.Add(new MyBullet(MyPlane.x + 13, MyPlane.y - 10, 0));
          if (MyPlane.isGetGun)
          {
              mybulList.Add(new MyBullet(MyPlane.x + 13, MyPlane.y - 8, 60));
              mybulList.Add(new MyBullet(MyPlane.x + 7, MyPlane.y - 8, 30));
              mybulList.Add(new MyBullet(MyPlane.x + 30, MyPlane.y - 12, 120));
              mybulList.Add(new MyBullet(MyPlane.x, MyPlane.y - 7, 150));
          }
      }
  }

定义敌机碰撞检测方法

复制
/// <summary>
/// 敌机碰撞检测方法
/// </summary>public static void IsHitEnemy(Graphics g)
{
    Rectangle myPlaneRect = new Rectangle(MyPlane.x, MyPlane.y, MyPlane.myPlaneImg.Width, MyPlane.myPlaneImg.Height);    //包住myplane的Rectangle
 
    //g.DrawRectangle(new Pen(Color.Red), myPlaneRect);for(int i = 0; i < mybulList.Count; i++)for (int j = 0; j < Fighter.fighters.Count; j++)
      { 
          Rectangle mybulRect = new Rectangle(mybulList[i].x, mybulList[i].y, 8, 10);
          Rectangle fighterRect = new Rectangle(Fighter.fighters[j]._x, Fighter.fighters[j]._y, 65, 45);
          //g.DrawRectangle(new Pen(Color.Black), fighterRect);if (mybulRect.IntersectsWith(fighterRect))   //我方子弹击中敌机，敌机爆炸
          {
             mybulList.Remove(mybulList[i]);
             Fighter.fighters[j].flag = true;
             if (MyPlane.score < 100)
             {
                 MyPlane.score += 1;
             }
          }
          else if (myPlaneRect.IntersectsWith(fighterRect))  //我方飞机撞上敌机，敌机爆炸
          {
              Fighter.fighters[j].flag = true;
              if (MyPlane.score < 100)
              {
                  MyPlane.score += 1;
              }
          }
     }
}