blockfactory.cs

陈广老师讲课的源代码

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Collections;
using System.Windows.Forms;

namespace MyTetris
{
    /// <summary>   class BlockFactory
    /// 生产方块的类
    /// </summary>
    class BlockFactory
    {
        /// <summary>
        ///  存放所有方块样式信息！
        /// </summary>
        private BlockInfoArr info;     
        /// <summary>
        /// 方块颜色(背景色)
        /// </summary>
        protected Color disapperColor;  
        /// <summary>
        /// 每个方块的像素
        /// </summary>
        protected int rectPix;

        /// <summary>   public BlockFactory()
        /// 构造函数
        /// </summary>
        public BlockFactory()
        {
            Config config = new Config();
            config.LoadFromXml();
            info=new BlockInfoArr();
            info=config.Info;
            disapperColor=config.BackColor;
            rectPix=config.RectPix;
        }

        /// <summary>   public Block GetBlock()
        /// 从方块组中随机获取一个方块信息
        /// </summary>
        /// <returns></returns>
        public Block GetBlock()
        {
            Random rd = new Random();
            int blockNum =Convert.ToInt32(rd.Next(0,info.Length));           
            BitArray ba = info[blockNum].Id;    //随机取出一个方块样式赋给ba
            int strNum = 0;     //确定方块样式中被填充的小方块个数，（确定数组的长度）
            foreach(bool b in ba)
            {
                if(b)
                {
                    strNum++;   
                }
            }           
            Point[] structArr = new Point[strNum];  //新建一个Point数组,并确定其长度，以创建新的Block
            int k = 0;
            for (int i = 0; i < ba.Length;i++ )
            {
                if(ba[i])       //将为1的位转换成（五乘五）矩阵的下标
                {   
                    structArr[k].X = i / 5 - 2;
                    structArr[k].Y = 2 - i % 5;
                    k++;
                }
            }
            return new Block(structArr, info[blockNum].Bcolor,disapperColor,rectPix);   //创建block并返回
        }

    }
}