python - 在pygame上的记忆解谜游戏中，我可以在玩游戏时保持原来的显示速度慢，然后再加快吗？

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，但这是用于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)

标签： pythonpygame

Answer 1

所以我们想用两种不同的速度来做动画，所以让我们首先为它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revealBoxesAnimationandcoverBoxesAnimation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，所以让我们将我们想要使用的速度作为参数传递。将函数更改为：

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。

由于我们只想在游戏开始时减慢动画速度，因此我们只需更改开始时发生的方法调用。如果我们搜索使用的地方revealBoxesAnimation，我们会找到该startGameAnimation功能。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。