python - 在pygame上的内存益智游戏中，我可以保持原来的显示速度很慢，然后在玩游戏时让它变快吗？

Question

这是游戏代码

https://inventwithpython.com/pygame/chapter3.html

我目前将显示速度设置为 1，但这是针对初始显示和玩游戏时的显示。无论如何，我是否能够将初始显示速度保持在 1，然后在播放时将显示速度更改为更快的速度？

为了做到这一点，我觉得我需要在第 12 行的 revealspeed 下添加一行代码，我只是不知道新行应该说什么。

FPS = 30 # frames per second, the general speed of the program
WINDOWWIDTH = 640 # size of window's width in pixels
WINDOWHEIGHT = 480 # size of windows' height in pixels
REVEALSPEED = 2 # speed boxes' sliding reveals and covers
BOXSIZE = 60 # size of box height & width in pixels
GAPSIZE = 10 # size of gap between boxes in pixels
BOARDWIDTH = 8 # number of columns of icons
BOARDHEIGHT = 7 # number of rows of icons
assert (BOARDWIDTH * BOARDHEIGHT) % 2 == 0, 'Board needs to have an even number of boxes for pairs of matches.'
XMARGIN = int((WINDOWWIDTH - (BOARDWIDTH * (BOXSIZE + GAPSIZE))) / 2)
YMARGIN = int((WINDOWHEIGHT - (BOARDHEIGHT * (BOXSIZE + GAPSIZE))) / 2)

Answer 1

所以我们想以两种不同的速度制作动画，所以让我们首先为此创建一个新的全局变量:

...
WINDOWHEIGHT = 480 # size of windows' height in pixels
# ADD THIS
INITIALREVEALSPEED = 1 # speed boxes' sliding reveals and covers AT THE START OF THE GAME
REVEALSPEED = 8 # speed boxes' sliding reveals and covers
BOXSIZE = 40 # size of box height & width in pixels
...

通过搜索 REVEALSPEED，我们看到动画是在 revealBoxesAnimation 和 coverBoxesAnimation 函数中处理的。他们使用 REVEALSPEED 常量(不是真正的常量，但是嘿)，但我们希望速度是动态的，所以让我们只传递我们想要用作参数的速度。将功能更改为:

def revealBoxesAnimation(board, boxesToReveal, speed=REVEALSPEED):
    # Do the "box reveal" animation.
    for coverage in range(BOXSIZE, (-speed) - 1, -speed):
        drawBoxCovers(board, boxesToReveal, coverage)


def coverBoxesAnimation(board, boxesToCover, speed=REVEALSPEED):
    # Do the "box cover" animation.
    for coverage in range(0, BOXSIZE + speed, speed):
        drawBoxCovers(board, boxesToCover, coverage)

我们仍然使用 REVEALSPEED 作为默认值，因此我们不必更改每个方法调用。

因为我们只想在游戏开始时放慢动画速度，所以我们只需更改开始时发生的方法调用。如果我们搜索使用 revealBoxesAnimation 的地方，我们会找到 startGameAnimation 函数。让我们将其更改为:

def startGameAnimation(board):
    # Randomly reveal the boxes 8 at a time.
    coveredBoxes = generateRevealedBoxesData(False)
    boxes = []
    for x in range(BOARDWIDTH):
        for y in range(BOARDHEIGHT):
            boxes.append( (x, y) )
    random.shuffle(boxes)
    boxGroups = splitIntoGroupsOf(8, boxes)

    drawBoard(board, coveredBoxes)
    for boxGroup in boxGroups:
        revealBoxesAnimation(board, boxGroup, INITIALREVEALSPEED)
        coverBoxesAnimation(board, boxGroup, INITIALREVEALSPEED)

就是这样。