如何在Python/Pygame中复制对象？

Question

我正在玩一个用Pygame制作的平台游戏。目前我有一个玩家角色、一个挡板和背景。玩家可以在关卡的地面或挡板上跑动，当角色跑到边缘时，屏幕会跟着移动。

不过，我想要一种方法，可以创建多个挡板，而不需要一个个单独去做。这里有一些相关的代码。

这段代码是在游戏的主循环之前创建挡板的...

bumper = pygame.image.load("bumper.png") #load bumper pic
bumperbounds = bumper.get_clip() #create boundaries for bumper
bumperbounds = bumperbounds.move (200, 250) #move the bumper to starting location

这段代码是让挡板阻止玩家掉下去的。它只是把“着陆”这个值设为1...

    if playerbounds.left <= bumperbounds.right and playerbounds.right >= bumperbounds.left and playerbounds.bottom <= bumperbounds.top + 30 and playerbounds.bottom >= bumperbounds.top and gravity >=0: #if player lands on top of the bumper
        landed = 1 #set player to landed

这段代码是为了让玩家正确地落在平台上。基本上，它在最后一次循环时减慢玩家的下落速度，这样玩家正好以自己的下落速度落在挡板的顶部。

    if playerbounds.left <= bumperbounds.right and playerbounds.right >= bumperbounds.left and playerbounds.bottom <= bumperbounds.top and gravity > bumperbounds.top-playerbounds.bottom: #to land exactly on the top of the bumper
        gravity = bumperbounds.top-playerbounds.bottom

这段代码是为了在屏幕滚动时移动挡板。这只是向右移动，向左的方式基本上是一样的。

    if xacc > 0:#if player is moving right
        if playerx >= width * .8 and screenx < levelwidth - playerbounds.width:#if the screen is scrolling
            screenx = screenx + xacc
            bumperbounds = bumperbounds.move(-xacc, 0) #bumper moves on the screen
            skybounds = skybounds.move(-xacc / 10, 0)
            groundbounds = groundbounds.move(-xacc * 2, 0)
        else:
            playerbounds = playerbounds.move(xacc, 0)
            playerx += xacc
        xacc -= 1

这段代码只是显示挡板在循环结束时出现在屏幕上的样子。

    screen.blit(bumper,bumperbounds) #displays the bumper on the screen

任何帮助都很有用？！

Answer 1

你需要为你正在创建的对象建立一个类。

比如说：

class Leaf:
    def __init__(self):
        self.leafimage = pygame.image.load('fallingleaf.jpg').convert()
        self.leafrect = self.leafimage.get_rect()
        xpos = random.randint(0, 640)
        self.leafrect.midtop = (xpos, 0)
    def move(self):
        self.leafrect = self.leafrect.move([0, 1])

如果你想同时创建多个对象，

leaves = []
for i in range(5):
    leaves.append(Leaf())

可以通过改变xpos的值来实现：

class Leaf:
    def __init__(self,xpos):
        self.leafimage = pygame.image.load('fallingleaf.jpg').convert()
        self.leafrect = self.leafimage.get_rect()
        self.leafrect.midtop = (xpos, 0)
    def move(self):
        self.leafrect = self.leafrect.move([0, 1])
    To create objects at the same time,

leaves = []
xpos= [20 30 40 50 60]
for i in range(5):
    leaves.append(Leaf(xpos[i]))