private void elementMove(object obj)
{
TetrisElement telement = obj as TetrisElement;
while (isRunning && telement != null)
{
if (!isMove)
{
telement = TetrisFactory.move(tcontainer, telement, TetrisDirection.DEFAULT);
}
Thread.Sleep(500);
}
element = telement;
}
/// <summary>
/// 后台线程执行
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void BgWorker_DoWork(object sender, DoWorkEventArgs e)
{
while (isRunning)
{
if (element == null)
{
//如果元素为空，则创建元素，并启动新线程
element = TetrisFactory.generate();
Thread t = new Thread(new ParameterizedThreadStart(elementMove));
t.Start(element);
}
else
{
//暂停1秒钟
Thread.Sleep(1000);
}
}
}
/// <summary>
/// 更新tetris
/// </summary>
/// <param name="element"></param>
private void updateTetris(TetrisElement element)
{
Point location = element.location;
Point[] content = element.content;
int minX = element.getMinX(element.style);
int maxX = element.getMaxX(element.style);
int minY = element.getMinY(element.style);
int maxY = element.getMaxY(element.style);
foreach (Point p in content)
{
if (location.Y + p.Y < 20 && location.Y + p.Y >= 0 && location.X + p.X >= 0 && location.X + p.X < 10)
{
this.tetris[location.X + p.X, location.Y + p.Y] = 1;
}
}
}
/// <summary>
/// 静态函数，生成Tetris元素对象
/// </summary>
/// <returns></returns>
public static TetrisElement generate()
{
Random r = new Random(0);
//随机生成形状
int tstyle = getRandom();
tstyle = tstyle % 7;
TetrisStyle style = TetrisStyle.I;
style = (TetrisStyle)Enum.Parse(typeof(TetrisStyle), tstyle.ToString());
//随机生成起始坐标
int x = getRandom();
x = x % 10;
int y = 0;
//根据形状生成位置信息
TetrisElement element = new TetrisElement(style);
//内容由四个点组成，顺序：先上后下，先左后右
Point[] content = element.getContent(style);
//获取最小坐标和最大坐标，防止越界
int minX = element.getMinX(style);
int minY = element.getMinY(style);
int maxX = element.getMaxX(style);
int maxY = element.getMaxY(style);
//修正起始坐标
x = (x <= minX) ? minX : x;
x = (x >= maxX) ? maxX : x;
y = minY;
Point location = new Point(x, y);
element.location = location;
element.content = content;
return(element);
}
/// <summary>
/// 移动元素
/// </summary>
/// <param name="container"></param>
/// <param name="element"></param>
/// <param name="direction"></param>
/// <returns></returns>
public static TetrisElement move(TetrisContainer container, TetrisElement element, TetrisDirection direction)
{
return(container.change(element, direction));
}
/// <summary>
/// 判断是否可以向右移动
/// </summary>
/// <param name="element"></param>
/// <returns></returns>
private bool checkRight(TetrisElement element)
{
Point location = element.location;
Point[] content = element.content;
int maxY = element.getMaxY(element.style);
int maxX = element.getMaxX(element.style);
int minX = element.getMinX(element.style);
int minY = element.getMinY(element.style);
bool flag = false;
if (location.Y >= 0)
{
switch (element.style)
{
case TetrisStyle.I:
if (location.X <= maxX)
{
//I形状，如果没有到最左边，且左边一排元素为空，则返回true
if (location.X + content[0].X + 1 < 10 && this.tetris[location.X + content[0].X + 1, location.Y + content[0].Y] == 0 && this.tetris[location.X + content[1].X + 1, location.Y + content[1].Y] == 0 && this.tetris[location.X + content[2].X + 1, location.Y + content[2].Y] == 0 && this.tetris[location.X + content[3].X + 1, location.Y + content[3].Y] == 0)
{
flag = true;
}
}
break;
case TetrisStyle.J:
if (location.X <= maxX)
{
//J形状,如果没有到底，且第1,2，3个元素的左面都为空，则返回true
if (location.X + content[0].X + 1 < 10 && this.tetris[location.X + content[0].X + 1, location.Y + content[0].Y] == 0 && this.tetris[location.X + content[1].X + 1, location.Y + content[1].Y] == 0 && this.tetris[location.X + content[2].X + 1, location.Y + content[2].Y] == 0)
{
flag = true;
}
}
break;
case TetrisStyle.L:
//L形状,如果没有到底，且第1,2,4个元素的左面都为空，则返回true
if (location.X <= maxX)
{
if (location.X + content[0].X + 1 < 10 && this.tetris[location.X + content[0].X + 1, location.Y + content[0].Y] == 0 && this.tetris[location.X + content[1].X + 1, location.Y + content[1].Y] == 0 && this.tetris[location.X + content[3].X + 1, location.Y + content[3].Y] == 0)
{
flag = true;
}
}
break;
case TetrisStyle.O:
case TetrisStyle.Z:
//O形状,如果没有到底，且第2,4个元素的左面都为空，则返回true
if (location.X <= maxX)
{
if (location.X + content[1].X + 1 < 10 && this.tetris[location.X + content[1].X + 1, location.Y + content[1].Y] == 0 && this.tetris[location.X + content[3].X + 1, location.Y + content[3].Y] == 0)
{
flag = true;
}
}
break;
case TetrisStyle.S:
//S形状,如果没有到底，且第1,3个元素的左面都为空，则返回true
if (location.X <= maxX)
{
if (location.X + content[0].X + 1 < 10 && this.tetris[location.X + content[0].X + 1, location.Y + content[0].Y] == 0 && this.tetris[location.X + content[2].X + 1, location.Y + content[2].Y] == 0)
{
flag = true;
}
}
break;
case TetrisStyle.T:
//T形状,如果没有到底，且第3,4个元素的左面都为空，则返回true
if (location.X <= maxX)
{
if (location.X + content[3].X + 1 < 10 && this.tetris[location.X + content[2].X + 1, location.Y + content[2].Y] == 0 && this.tetris[location.X + content[3].X + 1, location.Y + content[3].Y] == 0)
{
flag = true;
}
}
break;
default:
if (location.X <= maxX)
{
//I形状，如果没有到最左边，且左边一排元素为空，则返回true
if (location.X + content[0].X + 1 < 10 && this.tetris[location.X + content[0].X + 1, location.Y + content[0].Y] == 0 && this.tetris[location.X + content[1].X + 1, location.Y + content[1].Y] == 0 && this.tetris[location.X + content[2].X + 1, location.Y + content[2].Y] == 0 && this.tetris[location.X + content[3].X + 1, location.Y + content[3].Y] == 0)
{
flag = true;
}
}
break;
}
}
return(flag);
}
/// <summary>
/// 状态发生改变
/// </summary>
/// <param name="element"></param>
/// <param name="direction"></param>
/// <returns></returns>
public TetrisElement change(TetrisElement element, TetrisDirection direction)
{
TetrisElement tmp = null;
//判断不同的方向
switch (direction)
{
case TetrisDirection.DEFAULT:
//如果可以向下移动
if (checkDefault(element))
{
//向下移动一个元素
element.move(element.location.X, element.location.Y + 1);
tmp = element;
}
else
{
//如果不可以向下移动，则更新容器
updateTetris(element);
tmp = null;
}
break;
case TetrisDirection.DOWN:
break;
case TetrisDirection.UP:
break;
case TetrisDirection.LEFT:
if (checkLeft(element))
{
//判断是否可以向左移动
//向下移动一个元素
element.move(element.location.X - 1, element.location.Y);
tmp = element;
}
break;
case TetrisDirection.RIGHT:
if (checkRight(element))
{
//判断是否可以右左移动
//向下移动一个元素
element.move(element.location.X + 1, element.location.Y);
tmp = element;
}
break;
}
//局部变更
if (onPartialChanged != null)
{
Point location = element.location;
Point[] content = new Point[4];
element.content.CopyTo(content, 0);
for (int i = 0; i < content.Length; i++)
{
content[i].X = location.X + content[i].X;
content[i].Y = location.Y + content[i].Y;
}
onPartialChanged(location, content, direction);
}
//判断游戏是否结束
if (onCompleted != null)
{
if (checkComplete())
{
onCompleted();
}
}
//全部变更
if (onFullChanged != null)
{
//判断是是否有权为1的行，如果有则消掉
int[] rows = checkAllTetris();
if (rows.Length > 0)
{
updateAllTetris(rows);//消掉行
onFullChanged(tetris);
}
}
return(tmp);
}
/// <summary>
/// 判断默认情况：下方是否有元素
/// </summary>
/// <returns></returns>
private bool checkDefault(TetrisElement element)
{
Point location = element.location;
Point[] content = element.content;
int maxY = element.getMaxY(element.style);
int maxX = element.getMaxX(element.style);
int minX = element.getMinX(element.style);
int minY = element.getMinY(element.style);
bool flag = false;
switch (element.style)
{
case TetrisStyle.I:
if (location.Y > minY)
{
//I形状，如果没有到底，且最下面一个元素为空，则返回true
if (location.Y + content[3].Y + 1 < 20 && this.tetris[location.X, location.Y + content[3].Y + 1] == 0)
{
flag = true;
}
}
else
{
flag = true;
}
break;
case TetrisStyle.J:
case TetrisStyle.L:
case TetrisStyle.O:
if (location.Y > minY)
{
//J,L,O形状,如果没有到底，且第3，4个元素的下面都为空，则返回true
if (location.Y + content[3].Y + 1 < 20 && this.tetris[location.X + content[2].X, location.Y + content[2].Y + 1] == 0 && this.tetris[location.X + content[3].X, location.Y + content[3].Y + 1] == 0)
{
flag = true;
}
}
else
{
flag = true;
}
break;
case TetrisStyle.S:
case TetrisStyle.T:
case TetrisStyle.Z:
if (location.Y > minY)
{
//S,T,Z形状如果没有到底，且第1,3，4个元素的下面都为空，则返回true
if (location.Y + content[3].Y + 1 < 20 && this.tetris[location.X + content[0].X, location.Y + content[0].Y + 1] == 0 && this.tetris[location.X + content[2].X, location.Y + content[2].Y + 1] == 0 && this.tetris[location.X + content[3].X, location.Y + content[3].Y + 1] == 0)
{
flag = true;
}
}
else
{
flag = true;
}
break;
default:
if (location.Y > minY)
{
//默认I形状，如果没有到底，且最下面一个元素为空，则返回true
if (location.Y + content[3].Y + 1 < 20 && this.tetris[location.X, location.Y + content[3].Y + 1] == 0)
{
flag = true;
}
}
else
{
flag = true;
}
break;
}
return(flag);
}
