GameField.cs

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using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Media;
using System.IO;

namespace Tetris
{
    class GameField
    {
        public const int width = 20;           //场景的宽，以方块个数为单位
        public const int height = 30;
        public const int SquareSize = 15;      //每个四分之一小方块的边长
        public static Color BackColor;         //场景的背景色
        public static System.IntPtr winHandle; //场景的handle
        public static Color[] BlockForeColor = { Color.Blue, Color.Beige, Color.DarkKhaki, Color.DarkMagenta, Color.DarkOliveGreen, Color.DarkOrange, Color.DarkRed };
        public static Color[] BlockBackColor = { Color.LightCyan, Color.DarkSeaGreen, Color.Beige, Color.Beige, Color.Beige, Color.Beige, Color.Beige };
        public static bool isChanged = false; //设置是否被更改的标志位
        public static SoundPlayer sound = new SoundPlayer();

        public static Square[,] arriveBlock = new Square[width, height]; //保存已经不能再下落了的方块
        public static int[] arrBitBlock = new int[height];  //位数组：当某个位置有方块时，该行的该位为1
        private const int bitEmpty = 0x0;      //0000 0000 0000 0000 0000
        private const int bitFull = 0xFFFFF;   //1111 1111 1111 1111 1111

        /*检测是否为空*/
        public static bool isEmpty(int x, int y)
        {
            //先检测是否越界
            if (y < 0 || y >= height)
                return false;
            if (x < 0 || x >= width)
                return false;
            //然后检测是否为空
            if ((arrBitBlock[y] & (1 << x)) != 0)
                return false;
            else
                return true;
        }
        /*将方块停住*/
        public static void stopSquare(Square sq, int x, int y)
        {
            arriveBlock[x, y] = sq;
            arrBitBlock[y] = arrBitBlock[y] | (1 << x);
        }
        /*检测行是否满 
         * 返回：成功消除的行数和  （方便统计分数）
         */
        public static int CheckLines()
        {
            //从最下面一行往上检测，当某行为空或到顶时结束
            int lineFullCount = 0;
            int y = height - 1;
            while (y >= 0 && arrBitBlock[y] != bitEmpty)
            {
                if (arrBitBlock[y] == bitFull)
                {
                    lineFullCount++; //消除一行记分
                    arrBitBlock[y] = bitEmpty;//消除该行的block