Не могу получить мой звездный листок для работы над игрой

Question

Может кто-нибудь мне помочь Я пытаюсь получить свой космический фон для работы над игрой, но я не могу это сделать, может кто-нибудь обнаружить что-то, что я не могу или увидеть, где я ошибаюсь. Я объединил два моих кода, поэтому я не уверен, где я поступил неправильно, но попытался исправить это, но просто размыть.

import pygame, random, time 
import os,sys,random 
import pygame 
from pygame.locals import * 
pygame.init() 

#set up the graphics window 
size = [800, 595] 
screen = pygame.display.set_mode(size, 0) 
screenrect = screen.get_rect() 
pygame.display.set_caption("Mathsvaders") 
clock = pygame.time.Clock() 


# set some variables 
done = False 
life = 3 

aliens = pygame.sprite.Group() 
allsprites = pygame.sprite.Group() 
bombs = pygame.sprite.Group() 
green = [0, 255, 0] 
white = [255, 255, 255] 

def disp(phrase, loc, screen, color): # func to display text 
    s = font.render(phrase, True, color) 
    screen.blit(s, loc) 

def draw_star(star): # drawing a star 
    # you only need to change a pixel, so use set_at, not draw.line 
    screen.set_at((star[0], star[1]), (255, 255, 255)) 
    star[0] -= 1 
    if star[0] < 0: 
     star[0] = screen.get_width() 
     star[1] = random.randint(0, screen.get_height()) 
# creating list of stars, used multi-line for loop for readability 
stars = [] 
for i in range(200): 
    x = random.randint(0, screen.get_width()) 
    y = random.randint(0, screen.get_height()) 
    stars.append([x,y]) 

    # drawing stars 
    for star in stars: 
     draw_star(star) 

    screen.fill((0,0,0)) 

    pygame.display.flip() 
    clock.tick(22) 

# create a timer to control how often the screen updates 
clock = pygame.time.Clock() 
fps = 100 

# loads images to use in the game which link in with my classes(further down) 
cannon = pygame.image.load("spaceship.png").convert() 
cannon.set_colorkey(white) 
blast = pygame.image.load("blast.png").convert_alpha() 
boom = pygame.image.load("expl.png").convert_alpha() 
bomb = pygame.image.load("missile_player.png").convert_alpha() 
back = pygame.image.load("rsz_space.png").convert() 
enemy = pygame.image.load("sii.png").convert_alpha() 
lives2 = pygame.image.load("alien2.png").convert() 
lives2.set_colorkey(white) 
lives3 = pygame.image.load("alien3.png").convert() 
lives3.set_colorkey(white) 
lives1 = pygame.image.load("alien1.png").convert() 
lives1.set_colorkey(white) 


# (Classes) 
# the explosion class 
class Explosion(pygame.sprite.Sprite): 
    def __init__(self, x, y): 
     pygame.sprite.Sprite.__init__(self) 
     self.image = boom 
     self.rect = self.image.get_rect() 
     self.rect.centerx = x 
     self.rect.centery = y 
     self.count = 6 

    def update(self): 
     self.count -= 1 
     if self.count < 1: 
     self.kill() 

class scoreClass: 
    def __init__(self): 
     self.value = 0 
     # set a font, default font size 28 
     self.font = pygame.font.Font(None, 28) 

    def update(self): 
     text = self.font.render("Score: %s" % self.value, True, (green)) 
     textRect = text.get_rect() 
     textRect.centerx = screenrect.centerx 
     screen.blit(text, textRect) 

class Msg: 
     def __init__(self, words): 
     # set a font, default font size 28 
     self.font = pygame.font.Font(None, 28) 
     self.text = self.font.render(words, True, (green)) 
     self.textRect = self.text.get_rect() 

     def update(self): 
      self.textRect.centerx = screenrect.centerx 
     self.textRect.centery = screenrect.centery 
     screen.blit(self.text, self.textRect) 

# the invader class 
class Pi(pygame.sprite.Sprite): 
    def __init__(self, x, y): 
     pygame.sprite.Sprite.__init__(self) 
     aliens.add(self) 
     self.image = enemy 
     self.rect = self.image.get_rect() 
     self.rect.left = x 
     self.rect.top = y 
     self.speed = 1 

    def update(self): 
      self.rect.right += self.speed 
      if self.rect.right >= (screenrect.right -5): 
       self.speed = -1 
      self.rect.top += self.rect.height 
     if self.rect.left <= (screenrect.left +5): 
      self.speed = 1 
      self.rect.top += self.rect.height 
     if self.rect.top > screenrect.bottom: 
      self.kill() 
     i = random.randrange(200) 
     j = self.rect.centerx 
     if i == 1: 
      laser_bomb = Bomb(j, self.rect.bottom) 
      allsprites.add(laser_bomb) 
      aliens.add(laser_bomb) 

class Gun(pygame.sprite.Sprite): 
    def __init__(self): 
     pygame.sprite.Sprite.__init__(self) 
     self.image = cannon 
     self.rect = self.image.get_rect() 
     self.rect.bottom = screenrect.bottom 
     self.rect.centerx = screenrect.centerx 
     self.speed=0 

    def update(self): 
     self.rect.centerx += self.speed 
     if self.rect.right >= screenrect.right: 
      self.rect.centerx = 0 
     if self.rect.right <= 0: 
      self.rect.right = screenrect.right 

# bomb class 
class Bomb(pygame.sprite.Sprite): 
    def __init__(self, x, y): 
     pygame.sprite.Sprite.__init__(self) 
     self.image = bomb 
     self.rect = self.image.get_rect() 
     self.rect.centerx = x 
     self.rect.centery = y 
     bombs.add(self) 

    def update(self): 
     self.rect.centery +=1 

# the laser blast class 
class Blast(pygame.sprite.Sprite): 
    def __init__(self): 
     pygame.sprite.Sprite.__init__(self) 
     self.image = blast 
     self.image.set_colorkey(white) 
     self.rect = self.image.get_rect() 
     self.rect.top = (player.rect.top + 5) 
     self.rect.centerx = player.rect.centerx 
     self.speed = 0 

    def update(self): 
     if self.speed == 0: 
      self.rect.centerx = player.rect.centerx 
     self.rect.top -= self.speed 

# function to make a sheet of invaders 
def invade(): 
    for j in range(10, 240, 120): 
     for i in range(5): 
      aliens.add(Pi((i*70)+10, j)) 


def gameover(): 
    message = Msg("Game Over") 
    message.update() 
    player.kill() 
    shot.kill() 

перед игрой окно

invade() 

message = Msg("Press a key to play.") 
allsprites.add(aliens) 
key = True 

while key: 
    for event in pygame.event.get(): 
     if event.type == pygame.QUIT: 
      pygame.quit() 
     if event.type == pygame.KEYDOWN: 
      for item in (aliens): 
       item.kill() 
      key = False 

    allsprites.update() 
    allsprites.draw(screen) 
    message.update() 

     # set the loop to 40 cycles per second 
    clock.tick(fps) 

     # update the display 
    pygame.display.flip() 


# Main Game Starts Here 

score = scoreClass() 
player = Gun() 
shot = Blast() 
invade() 
allsprites.add(player, aliens, shot) 


while done==False: 
    for event in pygame.event.get(): 
     if event.type == pygame.QUIT: 
      done=True 

    if life <= 0: 
     gameover() 


    else: 
     # shoots laser missile 
     if event.type == pygame.KEYDOWN: 
      if event.key == pygame.K_UP: 
       if shot.speed == 0: 
        shot.speed = 5 
        #laser.play() 

      if event.key == pygame.K_LEFT: 
       player.speed = -3 
      if event.key == pygame.K_RIGHT: 
       player.speed = 3 

     if event.type == pygame.KEYUP: 
      if event.key == pygame.K_LEFT: 
       player.speed = 0 
      if event.key == pygame.K_RIGHT: 
       player.speed = 0 

     hit = pygame.sprite.spritecollide(shot, aliens, 1) 
     if len(hit) > 0: 
      explosion1 = Explosion(shot.rect.centerx, shot.rect.top) 
      score.value += 100 
      shot.kill() 
      #explode.play() 
      shot = Blast() 
      allsprites.add(shot, explosion1) 


     hit2 = pygame.sprite.spritecollide(player, aliens, 1) 
     if len(hit2) > 0: 
      life -= 1 
      #explode.play() 
      explosion2 = Explosion(player.rect.centerx, player.rect.centery) 
      allsprites.add(explosion2) 
      player.kill() 
      shot.kill() 
      if life > 0: 
       ready = Msg("Push Harder !!.") 
       ready.update() 
       allsprites.update() 
       allsprites.draw(screen) 
       score.update() 
       pygame.display.flip() 
       for item in bombs: 
        item.kill() 
       while 1: 
        event = pygame.event.wait() 
        if event.type == pygame.KEYDOWN: 
         break 
       player = Gun() 
       shot = Blast() 
       allsprites.add(player, shot) 

     if shot.rect.top <= screenrect.top: 
      shot.kill() 
      shot = Blast() 
      allsprites.add(shot) 

    if life == 2: 
     men = lives2 
    if life == 1: 
     men = lives1 
    if life == 3: 
     men = lives3 

    if life > 0: 
     screen.blit(men, (0,0)) 

    allsprites.update() 
    allsprites.draw(screen) 
    score.update() 

    # set the loop to "fps" cycles per second 
    clock.tick(fps) 
    # update the display 
    pygame.display.flip() 



# close pygame 
pygame.quit() 

Answer 1

Вы стирая экран после рисования звезды. Изменение:

# drawing stars 
for star in stars: 
    draw_star(star) 

screen.fill((0,0,0)) 

pygame.display.flip() 

к:

screen.fill((0,0,0)) 

# drawing stars 
for star in stars: 
    draw_star(star) 



pygame.display.flip()