我的游戏背景很奇怪。它不起作用并且精灵出现了，然后它起作用了，但是在精灵之上！
import pygame
import random
# Define some colors
black = ( 0, 0, 0)
white = ( 255, 255, 255)
lives = 10
# Call this function so the Pygame library can initialize itself
pygame.init()
screen = pygame.display.set_mode([700, 600])
clock = pygame.time.Clock()
# Set positions of graphics
background_position = [0,0]
# Make mouse invisible
pygame.mouse.set_visible(False)
pygame.font.init()
font= pygame.font.Font(None, 50)
# This class represents the ball
# It derives from the "Sprite" class in Pygame
class Background(pygame.sprite.Sprite):
# Constructor. Pass in the color of the block,
# and its x and y position
def __init__(self, width, height):
# Call the parent class (Sprite) constructor
pygame.sprite.Sprite.__init__(self)
# Create an image of the block.
# This could also be an image loaded from the disk.
self.image = pygame.image.load("Grass2.fw.png").convert()
# Fetch the rectangle object that has the dimensions of the image
# image.
# Update the position of this object by setting the values
# of rect.x and rect.y
self.rect = self.image.get_rect()
# Reset position to the right of the screen, at an x location.
# Called by update() or the main program loop if there is a collision.
def reset_pos(self):
self.rect.y =(0)
self.rect.x =(0)
# Called each frame
def update(self):
# Move block left some pixels
self.rect.x -= 1
# If block is too far left, reset to right of screen.
if self.rect.x < -700:
self.reset_pos()
class Block(pygame.sprite.Sprite):
# Constructor. Pass in the color of the block,
# and its x and y position
def __init__(self, color, width, height):
# Call the parent class (Sprite) constructor
pygame.sprite.Sprite.__init__(self)
# Create an image of the block, and fill it with a color.
# This could also be an image loaded from the disk.
self.image = pygame.image.load("Enemy small.fw.png").convert()
self.image.set_colorkey(white)
# Fetch the rectangle object that has the dimensions of the image
# image.
# Update the position of this object by setting the values
# of rect.x and rect.y
self.rect = self.image.get_rect()
# Reset position to the top of the screen, at a random x location.
# Called by update() or the main program loop if there is a collision.
def reset_pos(self):
self.rect.y = random.randrange(0, 600)
self.rect.x = random.randrange(700, 800)
# Called each frame
def update(self):
# Move block right one pixel
self.rect.x -= 1
# If block is too far left, reset to top of screen.
if self.rect.x < -100:
self.reset_pos()
class Player(Block):
def __init__(self, width, height):
# Call the parent class (Sprite) constructor
pygame.sprite.Sprite.__init__(self)
# Create an image of the block.
# This could also be an image loaded from the disk.
self.image = pygame.image.load("ship.fw.png").convert()
self.image.set_colorkey(white)
# Fetch the rectangle object that has the dimensions of the image
# image.
# Update the position of this object by setting the values
# of rect.x and rect.y
self.rect = self.image.get_rect()
def update(self):
# Get the current mouse position. This returns the position
# as a list of two numbers.
pos = pygame.mouse.get_pos()
# Fetch the x and y out of the list,
# just like we'd fetch letters out of a string.
# Set the player object to the mouse location
self.rect.x=pos[0]
self.rect.y=pos[1]
# Initialize Pygame
pygame.init()
# Set the height and width of the screen
screen_width=700
screen_height=600
screen=pygame.display.set_mode([screen_width,screen_height])
pygame.display.set_caption('Razazone')
clock.tick(70)
#This is a list of 'sprites.' Each block in the program is
# added to this list. The list is managed by a class called 'Group.'
block_list = pygame.sprite.Group()
# This is a list of every sprite. All blocks and the player block as well.
all_sprites_list = pygame.sprite.Group()
background_list = pygame.sprite.Group()
# This represents a background
background = Background(20,15)
# Set a location for the block
background.rect.x = (screen_width)
background.rect.y = (screen_height)
background_list.add(background)
# Add the block to the list of objects
all_sprites_list.add(background)
for i in range(1):
# This represents a block
block = Block(black, 20, 15)
# Set a random location for the block
block.rect.x = random.randrange(screen_width)
block.rect.y = random.randrange(screen_height)
# Add the block to the list of objects
block_list.add(block)
all_sprites_list.add(block)
# Create a red player block
player = Player(350, 300)
all_sprites_list.add(player)
done=False
我知道我的更新顺序有问题，但我不知道我需要做什么来解决这个问题。
# -------- Main Program Loop -----------
while done==False:
for event in pygame.event.get(): # User did something
if event.type == pygame.QUIT: # If user clicked close
done=True # Flag that we are done so we exit this loop#
# Calls update() method on every sprite in the list
all_sprites_list.update()
# See if the player block has collided with anything.
blocks_hit_list = pygame.sprite.spritecollide(player, block_list, False)
# Check the list of collisions.
for block in blocks_hit_list:
lives -=1
print (lives)
# Reset block to the top of the screen to fall again.
block.reset_pos()
# Reset block to the right of the screen to fall again.
#background.reset_pos()
if lives<=1:
lives=1
screen.fill(black)
background.update()
background_list.draw(screen)
# Draw all the spites
all_sprites_list.draw(screen)
lives_text=font.render("%d lives" % lives, True, white)
screen.blit(lives_text, [100,100])
#background.update()
# Go ahead and update the screen with what we've drawn.
pygame.display.flip()
pygame.quit()