def move(): """Update object positions.""" bird.y -= 5 for ball in balls: ball.x -= 3 if randrange(10) == 0: y = randrange(-199, 199) ball = vector(199, y) balls.append(ball) while len(balls) > 0 and not inside(balls[0]): balls.pop(0) if not inside(bird): draw(False) return

这是一个 Python 代码段，它定义了一个名为 `move()` 的函数。这个函数的作用是更新游戏中各个对象的位置。函数中有一个 `bird` 对象和一个 `balls` 列表，`bird` 对象的 `y` 坐标每次减少 5，`balls` 列表中的每个元素（即球）的 `x` 坐标每次减少 3。如果随机数生成器 `randrange(10)` 返回 0，则会在屏幕右侧随机生成一个新的球，并将其添加到 `balls` 列表中。接下来，函数会检查 `balls` 列表中的球是否已经超出屏幕外，如果是，则将其从列表中移除。最后，函数会检查 `bird` 对象是否已经碰到了屏幕的边缘，如果是，则会调用 `draw(False)` 函数来结束游戏。

相关问题

switch (Form) { case 1: p1 = CPoint(PositionS.x, PositionS.y); p2 = CPoint(PositionS.x + 48, PositionS.y); p3 = CPoint(PositionS.x + 61, PositionS.y); p4 = CPoint(PositionS.x + 100, PositionS.y); //p5 = CPoint(PositionS.x + 53, PositionS.y + 15); //p6 = CPoint(PositionS.x + 68, PositionS.y + 41); if (Status == 0) { p7 = CPoint(PositionS.x + 40, PositionS.y); p8 = CPoint(PositionS.x + 60, PositionS.y); } else if (Status == 1) { p7 = CPoint(PositionS.x + 49, PositionS.y + 5); p8 = CPoint(PositionS.x + 58, PositionS.y + 21); } break; case 2: p1 = CPoint(PositionS.x + 100, PositionS.y); p2 = CPoint(PositionS.x + 52, PositionS.y); p3 = CPoint(PositionS.x + 39, PositionS.y); p4 = CPoint(PositionS.x, PositionS.y); //p5 = CPoint(PositionS.x + 47, PositionS.y + 15); //p6 = CPoint(PositionS.x + 32, PositionS.y + 41); if (Status == 0) { p7 = CPoint(PositionS.x + 40, PositionS.y); p8 = CPoint(PositionS.x + 60, PositionS.y); } else if (Status == 1) { p7 = CPoint(PositionS.x + 51, PositionS.y + 5); p8 = CPoint(PositionS.x + 42, PositionS.y + 21); } break; case 3://11道岔 p1 = CPoint(PositionS.x, PositionS.y); p2 = CPoint(PositionS.x + 48, PositionS.y); p3 = CPoint(PositionS.x + 61, PositionS.y); p4 = CPoint(PositionS.x + 100, PositionS.y); p5 = CPoint(PositionS.x + 53, PositionS.y - 15); p6 = CPoint(PositionS.x + 68, PositionS.y - 41); if (Status == 0) { p7 = CPoint(PositionS.x + 40, PositionS.y); p8 = CPoint(PositionS.x + 60, PositionS.y); } else if (Status == 1) { p7 = CPoint(PositionS.x + 49, PositionS.y - 5); p8 = CPoint(PositionS.x + 58, PositionS.y - 21); } break; case 4://12道岔 p1 = CPoint(PositionS.x + 100, PositionS.y); p2 = CPoint(PositionS.x + 52, PositionS.y); p3 = CPoint(PositionS.x + 39, PositionS.y); p4 = CPoint(PositionS.x, PositionS.y); p5 = CPoint(PositionS.x + 47, PositionS.y - 15); p6 = CPoint(PositionS.x + 32, PositionS.y - 41); if (Status == 0) { p7 = CPoint(PositionS.x + 40, PositionS.y); p8 = CPoint(PositionS.x + 60, PositionS.y); } else if (Status == 1) { p7 = CPoint(PositionS.x + 51, PositionS.y - 5); p8 = CPoint(PositionS.x + 42, PositionS.y - 21); } break; }

这段代码是一个switch语句，根据变量Form的值来给p1、p2、p3、p4、p5、p6、p7和p8赋不同的坐标值。其中，如果Form的值为1，则p1的坐标为(PositionS.x, PositionS.y)，p2的坐标为(PositionS.x + 48, PositionS.y)，p3的坐标为(PositionS.x + 61, PositionS.y)，p4的坐标为(PositionS.x + 100, PositionS.y)；如果Form的值为2，则p1的坐标为(PositionS.x + 100, PositionS.y)，p2的坐标为(PositionS.x + 52, PositionS.y)，p3的坐标为(PositionS.x + 39, PositionS.y)，p4的坐标为(PositionS.x, PositionS.y)；如果Form的值为3，则p1的坐标为(PositionS.x, PositionS.y)，p2的坐标为(PositionS.x + 48, PositionS.y)，p3的坐标为(PositionS.x + 61, PositionS.y)，p4的坐标为(PositionS.x + 100, PositionS.y)，p5的坐标为(PositionS.x + 53, PositionS.y - 15)，p6的坐标为(PositionS.x + 68, PositionS.y - 41)；如果Form的值为4，则p1的坐标为(PositionS.x + 100, PositionS.y)，p2的坐标为(PositionS.x + 52, PositionS.y)，p3的坐标为(PositionS.x + 39, PositionS.y)，p4的坐标为(PositionS.x, PositionS.y)，p5的坐标为(PositionS.x + 47, PositionS.y - 15)，p6的坐标为(PositionS.x + 32, PositionS.y - 41)。根据Status的值不同，p7和p8也会有不同的坐标值。

p1 = CPoint(PositionS.x + 100, PositionS.y); p2 = CPoint(PositionS.x + 52, PositionS.y); p3 = CPoint(PositionS.x + 39, PositionS.y); p4 = CPoint(PositionS.x, PositionS.y); p5 = CPoint(PositionS.x + 47, PositionS.y - 15); p6 = CPoint(PositionS.x + 32, PositionS.y - 41); if (Status == 0) { p7 = CPoint(PositionS.x + 40, PositionS.y); p8 = CPoint(PositionS.x + 60, PositionS.y); } else if (Status == 1) { p7 = CPoint(PositionS.x + 51, PositionS.y - 5); p8 = CPoint(PositionS.x + 42, PositionS.y - 21); }

这段代码定义了七个点的坐标，它们分别是p1、p2、p3、p4、p5、p6、p7和p8，它们的具体坐标值是通过PositionS.x和PositionS.y计算得出的。其中，如果Status为0，则p7的坐标为(PositionS.x + 40, PositionS.y)，p8的坐标为(PositionS.x + 60, PositionS.y)；如果Status为1，则p7的坐标为(PositionS.x + 51, PositionS.y - 5)，p8的坐标为(PositionS.x + 42, PositionS.y - 21)。