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   源码介绍

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Drawing;
using System.Text;

namespace Tank
{
    //游戏状态
    public enum GameState
    {
        close = 1, open = 2
    }
    //方向
    public enum Direction
    {
        left = 1, up = 2, right = 3, down = 4
    }
    //坦克类
    public class tank
    {
        //坦克坐标位置
        public Point _position = new Point(300, 300);
        //运动方向
        public Direction _direction = Direction.up;
        //运动步长
        public int _step = 4;
        //坦克运动状态图片
        public Boolean _imgstate = true;


        //坦克位图数组
        Bitmap[] _tankBmp = new Bitmap[8];

        //当前坦克位图
        public Bitmap _nowTankBmp = new Bitmap(30, 30);

        //(方法)构造方法
        public tank()
        {
            //装载所有的坦克位图图片
            _tankBmp[0] = new Bitmap("MyTankUp1.gif");
            _tankBmp[1] = new Bitmap("MyTankUp2.gif");
            _tankBmp[2] = new Bitmap("MyTankDown1.gif");
            _tankBmp[3] = new Bitmap("MyTankDown2.gif");
            _tankBmp[4] = new Bitmap("MyTankLeft1.gif");
            _tankBmp[5] = new Bitmap("MyTankLeft2.gif");
            _tankBmp[6] = new Bitmap("MyTankRight1.gif");
            _tankBmp[7] = new Bitmap("MyTankRight2.gif");

            //设置坦克位图的透明色
            for (int i = 0; i <= 7; i  )
                _tankBmp[i].MakeTransparent(Color.Black);

            //当前坦克位图为向上运动的位图
            _nowTankBmp = _tankBmp[0];
        }
        //坦克运动
        public void Go(Direction direction)
        {
            _direction = direction;
            if (_direction == Direction.up)
            {
                _position.Y = _position.Y - _step;
                if (_imgstate == true)
                    _nowTankBmp = _tankBmp[0];
                else
                    _nowTankBmp = _tankBmp[1];
            }
            else if (_direction == Direction.down)
            {
                _position.Y = _position.Y   _step;
                if (_imgstate == true)
                    _nowTankBmp = _tankBmp[2];
                else
                    _nowTankBmp = _tankBmp[3];
            }
            else if (_direction == Direction.left)
            {
                _position.X = _position.X - _step;
                if (_imgstate == true)
                    _nowTankBmp = _tankBmp[4];
                else
                    _nowTankBmp = _tankBmp[5];
            }
            else if (_direction == Direction.right)
            {
                _position.X = _position.X   _step;
                if (_imgstate == true)
                    _nowTankBmp = _tankBmp[6];
                else
                    _nowTankBmp = _tankBmp[7];
            }
            _imgstate = !_imgstate;
        }
        //(方法)坦克图像绘制
        public void DrawMe(Graphics g)
        {
            g.DrawImage(_nowTankBmp, _position);
        }
    }
    //子弹类
    public class Bullet
    {
        //子弹坐标位置
        public Point _position;
        //子弹运动方向
        public Direction _direction = Direction.up;
        //子弹运动步长
        public int _step = 15;
        //子弹位图数组
        Bitmap[] _BulletBmp = new Bitmap[4];

        //当前子弹位图
        public Bitmap _nowBulletBmp = new Bitmap(16, 16);

        //方法
        public Bullet(Direction direction, Point point)
        {
            _direction = direction;
            _position = point;

            //装载所有的坦克位图图片
            _BulletBmp[0] = new Bitmap("BulletLeft.gif");
            _BulletBmp[1] = new Bitmap("BulletUp.gif");
            _BulletBmp[2] = new Bitmap("BulletRight.gif");
            _BulletBmp[3] = new Bitmap("BulletDown.gif");


            //设置子弹位图的透明色
            for (int i = 0; i <= 3; i  )
                _BulletBmp[i].MakeTransparent(Color.Black);

            if (_direction == Direction.left)
                _nowBulletBmp = _BulletBmp[0];
            else if (_direction == Direction.up)
                _nowBulletBmp = _BulletBmp[1];
            else if (_direction == Direction.right)
                _nowBulletBmp = _BulletBmp[2];
            else if (_direction == Direction.down)
                _nowBulletBmp = _BulletBmp[3];

        }
        //(方法)子弹图像绘制
        public void DrawBullet(Graphics g)
        {
            g.DrawImage(_nowBulletBmp, _position);
        }
        //(方法)子弹运动
        public void Go()
        {
            //设置子弹所在位置
            if (_direction == Direction.up)
                _position.Y = _position.Y - _step;
            else if (_direction == Direction.down)
                _position.Y = _position.Y   _step;
            else if (_direction == Direction.left)
                _position.X = _position.X - _step;
            else if (_direction == Direction.right)
                _position.X = _position.X   _step;
        }
    }
   
}