internal static int markAlmostWinPiecesYellow()
{
Form form1 = Application.OpenForms[0];
Piece p = null; int i = 0;
foreach (Piece piecesMarkItem in piecesMarkYellowNode)
{
if (piecesMarkItem != null)
{
p = new YellowPiece(piecesMarkItem.Location.X, piecesMarkItem.Location.Y);
//p.BringToFront();//不能先執行此行，因為加入表單控制項Controls.Add是以複製的方式傳入Controls集合
form1.Controls.Add(p);
form1.Controls[form1.Controls.Count - 1].BringToFront();
i++;
}
}
return(i);
}
private static void checkAlmostWinner(Point lastPlaceNode)
{
//count記下從現在下的這子開始看到幾顆相同的棋子，「=1」表示在下的這子
int count = 1, countReverse = 0; //反方向檢查是不包括自己，故初始值為0
int targetX = 0, targetY = 0; //檢查目標的節點
int pieceNoneCtr = 0; //記錄空子有幾個，因為快要贏，空位只能留一個
Point pointYellowPos = new Point(-1, -1);
for (int xDir = -1; xDir <= 1; xDir++)
{
for (int yDir = -1; yDir <= 1; yDir++)
{
//略過中心點（自己位置）不檢查，要輻射出去八方
if (xDir == 0 && yDir == 0)
{
continue;//若是現在下的這一子則略過後面的程式碼，換下個方向檢查
}
while (count < 5)
{
//int centerX = lastPlaceNode.X;
//int centerY= lastPlaceNode.Y;
targetX = lastPlaceNode.X + xDir * count;
targetY = lastPlaceNode.Y + yDir * count;
//只會被邊界外與對手棋子給卡死，否則一直延伸5個位置，沒有被障礙到，都有機會贏
if (targetX < 0 || targetY < 0 || targetX >= Board.NODE_COUNT_ONESIDE ||
targetY >= Board.NODE_COUNT_ONESIDE ||
(Board.GetPieceType(targetX, targetY) != PieceType.NONE &
Board.GetPieceType(targetX, targetY) != currentPlayer))
//如果此方向已沒有棋子或換色時，就調頭去看還有沒有同色棋子
{
countReverse = 0;
while (countReverse + count < 5)
{
countReverse++;
targetX = lastPlaceNode.X + xDir * countReverse * -1;//調頭即*-1，即可反方向
targetY = lastPlaceNode.Y + yDir * countReverse * -1;
if (targetX < 0 || targetY < 0 || targetX >= Board.NODE_COUNT_ONESIDE ||
targetY >= Board.NODE_COUNT_ONESIDE ||
(Board.GetPieceType(targetX, targetY) != PieceType.NONE &
Board.GetPieceType(targetX, targetY) != currentPlayer))
{
//如果反方向已被堵死，就結束此方向的檢查
goto nextdir;//跳出最接近這個break的封閉式迴圈while
}
else if (Board.GetPieceType(targetX, targetY) == PieceType.NONE)
{
pieceNoneCtr++;
}
else
{
pointYellowPos = Board.convertToFormPosition(new Point(targetX, targetY));
}
piecesMarkYellowNode[targetX, targetY] =
new YellowPiece(new Point(
pointYellowPos.X + Piece.IMAGE_WIDTH / 2,
pointYellowPos.Y + Piece.IMAGE_WIDTH / 2));
if (countReverse + count == 5)
{
if (pieceNoneCtr == 1)
{
almostWinner = currentPlayer;
return;//快要贏的確定了，就不用再找了
}
Array.Clear(piecesMarkYellowNode, 0, piecesMarkYellowNode.Length);
break;
}
}
}
else if (Board.GetPieceType(targetX, targetY) == PieceType.NONE)
{
pieceNoneCtr++;
}
//要五子連棋,找到同色子就加1
count++;
pointYellowPos = Board.convertToFormPosition(new Point(targetX, targetY));
piecesMarkYellowNode[targetX, targetY] =
new YellowPiece(new Point(
pointYellowPos.X + Piece.IMAGE_WIDTH / 2,
pointYellowPos.Y + Piece.IMAGE_WIDTH / 2));
}
nextdir:
if (count == 5)
{
if (pieceNoneCtr == 1)
{
almostWinner = currentPlayer;
return;//快要贏的確定了，就不用再找了
}
}
count = 1;
pieceNoneCtr = 0;
Array.Clear(piecesMarkYellowNode, 0, piecesMarkYellowNode.Length);
}
}
if (count == 5)
{
if (pieceNoneCtr == 1)
{
almostWinner = currentPlayer;
return;//快要贏的確定了，就不用再找了
}
//return;
}
//找到就會中途離開函式，故到此應是沒有
//if (almostWinner != PieceType.NONE)
// almostWinner = PieceType.NONE;
}