实现
我们实现俄罗斯方块,主要用到的是 PyQt5 库,安装使用 pip install PyQt5
即可,游戏的组成比较简单,主要包括:主界面、各种方块和计分板,下面我们来看一下具体实现。
首先,我们来画一个主界面,主要实现代码如下:
class MainBoard(QFrame): msg = pyqtSignal(str) BoardWidth = 10 BoardHeight = 20 Speed = 300 def __init__(self, parent): super().__init__(parent) self.initBoard() def initBoard(self): self.timer = QBasicTimer() self.isWaitingAfterLine = False self.curX = 0 self.curY = 0 self.numLinesRemoved = 0 self.board = [] self.setFocusPolicy(Qt.StrongFocus) self.isStarted = False self.isPaused = False self.clearBoard()
看一下效果:
分数的显示就是利用上面 msg 的 emit() 方法实现的。
我们接着画各种方块,方块的形状主要包括:T、Z、L、I、O 等,主要实现代码如下:
class ShapeForm(object): NoShape = 0 ZShape = 1 SShape = 2 LineShape = 3 TShape = 4 SquareShape = 5 LShape = 6 MirroredLShape = 7 class Shape(object): coordsTable = ( ((0, 0), (0, 0), (0, 0), (0, 0)), ((0, -1), (0, 0), (-1, 0), (-1, 1)), ((0, -1), (0, 0), (1, 0), (1, 1)), ((0, -1), (0, 0), (0, 1), (0, 2)), ((-1, 0), (0, 0), (1, 0), (0, 1)), ((0, 0), (1, 0), (0, 1), (1, 1)), ((-1, -1), (0, -1), (0, 0), (0, 1)), ((1, -1), (0, -1), (0, 0), (0, 1)) ) def __init__(self): self.coords = [[0,0] for i in range(4)] self.pieceShape = ShapeForm.NoShape self.setShape(ShapeForm.NoShape) def shape(self): return self.pieceShape def setShape(self, shape): table = Shape.coordsTable[shape] for i in range(4): for j in range(2): self.coords[i][j] = table[i][j] self.pieceShape = shape
看一下效果:
我们知道方块是不断自动下落的,因此需要一个计时器来控制,主要实现代码如下:
def timerEvent(self, event): if event.timerId() == self.timer.timerId(): if self.isWaitingAfterLine: self.isWaitingAfterLine = False self.newPiece() else: self.oneLineDown() else: super(MainBoard, self).timerEvent(event)
在方块下落的过程中,我们需要通过键盘来控制方块的形状以及左右移动,因此,我们需要一个按键事件来控制它,主要实现代码如下:
def keyPressEvent(self, event): if not self.isStarted or self.curPiece.shape() == ShapeForm.NoShape: super(MainBoard, self).keyPressEvent(event) return key = event.key() if key == Qt.Key_P: self.pause() return if self.isPaused: return elif key == Qt.Key_Left: self.tryMove(self.curPiece, self.curX - 1, self.curY) elif key == Qt.Key_Right: self.tryMove(self.curPiece, self.curX + 1, self.curY) elif key == Qt.Key_Down: self.tryMove(self.curPiece.rotateRight(), self.curX, self.curY) elif key == Qt.Key_Up: self.tryMove(self.curPiece.rotateLeft(), self.curX, self.curY) elif key == Qt.Key_Space: self.dropDown() elif key == Qt.Key_D: self.oneLineDown() else: super(MainBoard, self).keyPressEvent(event)
当方块落到底部后,需要来检测是否有构成一条直线的,因此我们需要有一个方法来找到所有能消除的行并且消除它们,主要实现代码如下:
def removeFullLines(self): numFullLines = 0 rowsToRemove = [] for i in range(MainBoard.BoardHeight): n = 0 for j in range(MainBoard.BoardWidth): if not self.shapeAt(j, i) == ShapeForm.NoShape: n = n + 1 if n == 10: rowsToRemove.append(i) rowsToRemove.reverse() for m in rowsToRemove: for k in range(m, MainBoard.BoardHeight): for l in range(MainBoard.BoardWidth): self.setShapeAt(l, k, self.shapeAt(l, k + 1)) numFullLines = numFullLines + len(rowsToRemove) if numFullLines > 0: self.numLinesRemoved = self.numLinesRemoved + numFullLines self.msg.emit(str(self.numLinesRemoved)) self.isWaitingAfterLine = True self.curPiece.setShape(ShapeForm.NoShape) self.update()
我们来看一下最终实现效果:
是不是有内味了。