我正试图为大学制作一款太空入侵者游戏，我有大部分代码来获得通行证，我让外星人/入侵者向左、向下、向右等移动，但我制作了一个类并导入了它，现在当我试图使它发挥作用时，它会比应该的更向右移动，然后就向下移动。我以为我正确地看了大学的幻灯片，但我搞不清这个问题。我认为这可能与xPos数字有关。
这是我的代码：
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()
这是我的入侵者类：
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
if self.invaders[0].getPosX() < 100:
self.alienDirection = +1
if self.invaders[10].getPosX() > 1160:
self.invaderDirection = -1
其中一个与另一个不同。
编辑：
还有，你不把它们都叠在一起吗？
for i in range(11):
self.invaders[i].moveVertical(8)
self.invaders[i].setPosX(xPos)
#xPos = xPos + self.alien.get_width()
难道不应该有一个基于i的偏移吗？为什么最后一行被注释掉了？
我不知道你在这个项目中是否对你可以使用哪些函数和类有一些限制，但如果你只使用自定义事件，就会简单得多！