刚才写了好多好多，特别有感觉的时候，结果没有保存，全没了，哇，难受的要命。
好了言归正传，今天是第三天了，今天来来实现，方块类：GameBlock，说以下这个类的功能吧：
1.这个类描述了俄罗斯方块中的下落方块的属性，首先对于下落的方块有X坐标，Y坐标，方块的宽度Width，方块的高度Height，下落的速度speed，形状BlockDeformation，颜色Color，最最重要的还需要一个数组用来存储已经下落完成的方块，至于为什么属性的修饰符这么定：
2.首先，对于方块的大小和数组是确定的，不能改变的，在整个游戏中都要访问，有什么办法可以快速访问呢，一个是可以声明为静态的，这样可以通过类名调用它比如：GameBlock.Width这种形式，还有一个是声明为接口，这样可以通过实现接口来调用它，非常方便，其次对于这个数组，首先他的大小是通过你设计的游戏窗口除以方块大小得到的。
3.对于颜色和形状为啥用枚举，由于颜色和形状是早就确定的，使用枚举可以避免掉无意义的编号，提高了程序的可读性，见名知意，推荐大家使用这个。
4.其次要将此方块对象绘制在游戏控件上，如何绘制呢，我们知道在窗口加载时需要调用Paint方法绘制窗体，那么，可以知道，在控件加载时也会有一个方法来绘制控件，那么我们可以重写控件的Paint方法，private void pictureBoxGame_Paint(object sender, PaintEventArgs e)将我们的方块绘制上去，由于，要绘图，必须得到Graphiceh画布，如何得到呢，可以查文档得到，PaintEventArgs e中的e可以获得，aphics g = e.Graphics;//获取绘图对象，这样我们可以在GameBlock中创建一个方法接受这个对象，在这个画布上绘制，代码如下，
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace 俄罗斯方块
{
enum BlockColor
{
Red = 1,//红
Blue,//蓝
Yellow,//黑
Green,//绿
}
enum BlockDeformation
{
AVerticalBar,//竖线
HorizontalLine,//横线
UpTriangle,//开口向上0的三角形
DownTriangle,//开口向下的三角形
LeftTriangle,//开口向左的三角形
RightTriangle,//开口向右的三角形
FourRectangular//四个小正方形组成的大正方形
}
/// <summary>
/// 游戏方块
/// </summary>
class GameBlock
{
public static readonly int width = 20;//游戏方块宽度
public static readonly int height = 20;//游戏方块高度
public static BlockColor[,] array = new BlockColor[13,23];//存贮游戏方块的数组
private int X;
private int Y;
private int speed = 1;
private BlockColor color = BlockColor.Yellow ;//方块的颜色，枚举
private BlockDeformation defor = BlockDeformation.UpTriangle;//方块的形状，枚举
//空参构造
public GameBlock() { }
//有参构造
public GameBlock(int x, int y)
{
X1 = x;
Y1 = y;
}
//封装字段
public int X1 { get => X; set => X = value; }
public int Y1 { get => Y; set => Y = value; }
public int Speed { get => speed; set => speed = value; }
internal BlockColor Color { get => color; set => color = value; }
internal BlockDeformation Defor { get => defor; set => defor = value; }
//将方块绘制在窗口
public RectangleF[] DrawBlockToWindow(Graphics g)
{
//制定画布样式
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
//需要绘制的矩形数组
RectangleF[] rectangleFs = null;
//绘制方块,十以内的随机数确定变化的外形，四以内的随机数确定变化的颜色，
switch (this.Defor)
{
case BlockDeformation.AVerticalBar:
rectangleFs = new RectangleF[] {
new RectangleF(this.X1, this.Y1, width, height),
new RectangleF(this.X1, this.Y1+1*height, width, height),
new RectangleF(this.X1, this.Y1+2*height,width, height),
new RectangleF(this.X1, this.Y1+3*height, width, height)};
g.FillRectangles(GetRandomColor(this.Color), rectangleFs);
return rectangleFs;
case BlockDeformation.HorizontalLine:
rectangleFs = new RectangleF[] {
new RectangleF(this.X1, this.Y1, width, height),
new RectangleF(this.X1+height, this.Y1, width, height),
new RectangleF(this.X1+2*height, this.Y1,width, height),
new RectangleF(this.X1+3*height, this.Y1, width, height)};
g.FillRectangles(GetRandomColor(this.Color), rectangleFs);
return rectangleFs;
case BlockDeformation.UpTriangle:
rectangleFs = new RectangleF[] {
new RectangleF(this.X1, this.Y1, width, height),
new RectangleF(this.X1, this.Y1+height, width, height),
new RectangleF(this.X1-width, this.Y1+height,width, height),
new RectangleF(this.X1+width, this.Y1+height, width, height)};
g.FillRectangles(GetRandomColor(this.Color), rectangleFs);
return rectangleFs;
case BlockDeformation.DownTriangle:
rectangleFs = new RectangleF[] {
new RectangleF(this.X1, this.Y1, width, height),
new RectangleF(this.X1+width, this.Y1, width, height),
new RectangleF(this.X1+2*width,this.Y1,width, height),
new RectangleF(this.X1+width, this.Y1+height, width, height)};
g.FillRectangles(GetRandomColor(this.Color), rectangleFs);
return rectangleFs;
case BlockDeformation.LeftTriangle:
rectangleFs = new RectangleF[] {
new RectangleF(this.X1, this.Y1, width, height),
new RectangleF(this.X1, this.Y1+1*height, width, height),
new RectangleF(this.X1, this.Y1+2*height,width, height),
new RectangleF(this.X1-width, this.Y1+height, width, height)};
g.FillRectangles(GetRandomColor(this.Color), rectangleFs);
return rectangleFs;
case BlockDeformation.RightTriangle:
rectangleFs = new RectangleF[] {
new RectangleF(this.X1, this.Y1, width, height),
new RectangleF(this.X1, this.Y1+1*height, width, height),
new RectangleF(this.X1, this.Y1+2*height,width, height),
new RectangleF(this.X1+width, this.Y1+height, width, height)};
g.FillRectangles(GetRandomColor(this.Color), rectangleFs);
return rectangleFs;
case BlockDeformation.FourRectangular:
rectangleFs = new RectangleF[] {
new RectangleF(this.X1, this.Y1, width, height),
new RectangleF(this.X1, this.Y1+1*height, width, height),
new RectangleF(this.X1+width, this.Y1+2*height,width, height),
new RectangleF(this.X1+width, this.Y1+height, width, height)};
g.FillRectangles(GetRandomColor(this.Color), rectangleFs);
return rectangleFs;
default:
rectangleFs = new RectangleF[] {
new RectangleF(this.X1, this.Y1, width, height),
new RectangleF(this.X1, this.Y1+1*height, width, height),
new RectangleF(this.X1, this.Y1+2*height,width, height),
new RectangleF(this.X1, this.Y1+3*height, width, height)};
g.FillRectangles(GetRandomColor(this.Color), rectangleFs);
return rectangleFs;
}
}
private Brush GetRandomColor(BlockColor xcolor)
{
Brush brush;
//获取随机颜色值
switch (xcolor)
{
case BlockColor.Red:
brush = Brushes.Red;
break;
case BlockColor.Blue:
brush = Brushes.Blue;
break;
case BlockColor.Green:
brush = Brushes.Green;
break;
case BlockColor.Yellow:
brush = Brushes.Yellow;
break;
default:
brush = null;
break;
}
return brush;
}
}
}
/* */
Graphics g = e.Graphics;//获取绘图对象
Brush brush;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
RectangleF[] rectangles = gameBlock.DrawBlockToWindow(g);g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;这句的意思是说明在画布上做图的质量，
System.Drawing.Drawing2D.SmoothingMode.AntiAlias这是一个系统自定义常量，意思是抗锯齿的 ， g.FillRectangles(GetRandomColor(this.Color), rectangleFs);意思是画一个填充矩形，为什么不用drawRectangles，这个是画矩形框不填充，填充色可以通过 brush = Brushes.Blue;对象指定。