pygame Space Invader類無法正確移動

Question

我正在嘗試為大學制作《太空侵略者》游戲，我擁有大部分代碼來獲得通行證，並且讓外星人/侵略者向左，向下，向右等方向移動，但是現在我做了一個班級並導入了它嘗試使其工作正常，然后再下降。 我以為我正確地遵循了大學的幻燈片，但是我找不到問題所在。 我認為這可能與xPos數字有關。

這是我的代碼：

import sys, pygame, os, Invader
from pygame.locals import *

class SpaceInvaders:

    # Constructor of the basic game class.
    # This constructor calls initialize and main_loop method.
    def __init__(self):
        self.initialize()
        self.main_loop()

    # Initialization method. Allows the game to initialize different
    # parameters and load assets before the game runs
    def initialize(self):
        pygame.init()
        pygame.key.set_repeat(1, 1) # This means when I hold A or D it repeats it for you so it doesn't move only a little
        os.environ['SDL_VIDEO_CENTERED'] = '1' # centres the game in the window on launch
        self.width = 1260
        self.height = 700
        self.screen = pygame.display.set_mode((self.width, self.height))

        self.caption = "Space Invaders!"    # This makes the top window say "Brick Breaker"
        pygame.display.set_caption(self.caption)

        self.framerate = 60

        self.clock = pygame.time.Clock()

        # Sprites
        self.background = pygame.image.load("background.jpg")
        self.defender = pygame.image.load("defender.png")
        self.alien = pygame.image.load("alien1.png")
        self.rocket = pygame.image.load("rocket.png")

        # Locations
        self.defenderPosX = 570
        self.defenderPosY = 610

        self.rocketPosX = -1
        self.rocketPosY = -1

        self.rocketFired = False

        self.alienDirection = -1
        self.alienSpeed = -1

        self.ticks = 0

        self.invaders = []
        xPos = 300
        for i in range(11):
            invader = Invader.Invader()
            invader.setPosX(xPos)
            invader.setPosY(100)
            self.invaders.append(invader)
            xPos += 65


    # main loop method keeps the game running. This method continuously
    # calls the update and draw methods to keep the game alive.
    def main_loop(self):        
        while True:
            gametime = self.clock.get_time()
            self.update(gametime)
            self.draw(gametime)
            self.clock.tick(self.framerate)

    # Update method contains game update logic, such as updating the game
    # variables, checking for collisions, gathering input, and
    # playing audio.
    def update(self, gametime):
        events = pygame.event.get()

        for event in events:
            if event.type == pygame.QUIT:
                pygame.quit()
                sys.exit()

            if event.type ==pygame.KEYDOWN:
                if event.key == pygame.K_ESCAPE:    # Makes the game exit when you press escape
                    pygame.quit()
                    sys.exit()

            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_a or event.key == pygame.K_LEFT:       # Makes the Defender move left
                    self.defenderPosX = self.defenderPosX - 15
                elif event.key == pygame.K_d or event.key == pygame.K_RIGHT:    # Makes the Defender move right
                    self.defenderPosX = self.defenderPosX + 15
                elif event.key == pygame.K_SPACE and self.rocketFired == False: # Makes the defender shoot a rocket
                    self.rocketPosX = self.defenderPosX + 47                    # Position of the rocekt on launch
                    self.rocketPosY = 620 - self.rocket.get_height()            # Position of the rocket on launch
                    self.rocketFired = True

        if self.rocketFired == True:
                self.rocketPosY = self.rocketPosY - 10  # If True, the rocket will move up 10px

        if self.rocketPosY < 10:
                self.rocketFired = False                # When it reaches 10px it'll reset the variable to False to start again

        # Stopping the aliens and rocket from going off screen

        if self.defenderPosX < 0:
            self.defenderPosX = 0

        if self.defenderPosX > 1156:
            self.defenderPosX = 1156

        if self.rocketPosX < 48:
            self.rocketPosX = 48

        if self.rocketPosX > 1204:
            self.rocketPosX = 1204

        self.ticks = self.ticks + gametime
        if self.ticks > 500:
            for i in range(11):
                self.invaders[i].moveHorizontal(self.alienSpeed * self.alienDirection)

            if self.invaders[0].getPosX() < 100:
                self.alienDirection = +1

                xPos = 96
                for i in range(11):
                    self.invaders[i].moveVertical(8)
                    self.invaders[i].setPosX(xPos)
                    #xPos = xPos + self.alien.get_width()

            if self.invaders[10].getPosX() > 1160:
                self.invaderDirection = -1

                xPos = 1260 - self.alien.get_width() * 11
                for i in range(11):
                    self.invaders[i].moveVertical(8)
                    self.invaders[i].setPosX(xPos)
                    #xPos = xPos + self.alien.get_width()

            self.ticks = 0          
    # Draw method, draws the current state of the game on the screen
    def draw(self, gametime):
        self.screen.blit(self.background, (0, 0))
        self.screen.blit(self.defender, (self.defenderPosX, self.defenderPosY))
        for i in range(11):
            self.screen.blit(self.alien, self.invaders[i].getPosition())
        if self.rocketFired == True:
            self.screen.blit(self.rocket, (self.rocketPosX, self.rocketPosY))



        #self.sprites.update()
        pygame.display.flip()


if __name__ == "__main__":
    game = SpaceInvaders()

這是我的入侵者職業：

class Invader:
    def __init__(self):
        self.__alienPosX = 0
        self.__alienPosY = 50

    def setPosX(self, x):
        self.__alienPosX = x

    def setPosY(self, y):
        self._alienPosY = y

    def getPosX(self):
        return self.__alienPosX

    def getPosY(self):
        return self.__alienPosY

    def getPosition(self):
        return (self.__alienPosX, self.__alienPosY)

    def moveHorizontal(self, amount):
        self.__alienPosX = self.__alienPosX + amount

    def moveVertical(self, amount):
        self.__alienPosY = self.__alienPosY + amount

Answer 1

if self.invaders[0].getPosX() < 100:
                self.alienDirection = +1

if self.invaders[10].getPosX() > 1160:
                self.invaderDirection = -1

這些事情之一與另一件事不一樣。

編輯：

另外，您不是在這里將它們全部移到另一個頂部嗎？

for i in range(11):
                    self.invaders[i].moveVertical(8)
                    self.invaders[i].setPosX(xPos)
                    #xPos = xPos + self.alien.get_width()

不應該基於i的偏移量嗎？ 為什么最后一行被注釋掉？

Answer 2

我不知道你有沒有在這個項目中的一些限制，以什么函數和類可以使用或沒有，但它是，如果你只是使用自定義事件檢查要簡單得多這里 ！