效果图如图所示。
下面是源代码：
主程序文件：
alien_invasion.py
import pygame
import game_functions as gf
from settings import Settings
from ship import Ship
from alien import Alien
from pygame.sprite import Group
from game_stats import GameStats
from button import Button
from scoreboard import Scoreboard
def run_game():
pygame.init()
ai_settings = Settings()
screen = pygame.display.set_mode(
(ai_settings.screen_width,ai_settings.screen_height))
pygame.display.set_caption("Alien Invasion")
ship = Ship(ai_settings,screen)
bullets = Group()
aliens = Group()
gf.create_fleet(ai_settings,screen,ship,aliens)
stats = GameStats(ai_settings)
play_button = Button(ai_settings,screen,"Play")
sb = Scoreboard(ai_settings,screen,stats)
while True:
gf.check_events(ai_settings,screen,stats,sb,play_button,ship,aliens,bullets)
if stats.game_active:
ship.update()
gf.update_bullets(ai_settings,screen,stats,sb,ship,aliens,bullets)
gf.update_aliens(ai_settings,screen,stats,sb,ship,aliens,bullets)
gf.update_screen(ai_settings,screen,stats,sb,ship,aliens,bullets,play_button)
run_game()
class Settings():
def __init__(self):
self.screen_width = 1200
self.screen_height = 800
self.bg_color = (230,230,230)
self.ships_limit = 3
self.bullet_width = 3
self.bullet_height = 15
self.bullet_color = 60,60,60
self.bullets_allowed = 10
self.fleet_drop_speed = 10
self.speedup_scale = 1.1
self.score_scale = 1.5
self.initialize_dynamic_settings()
def initialize_dynamic_settings(self):
self.ship_speed_factor = 1.5
self.bullet_speed_factor = 3
self.alien_speed_factor = 1
self.fleet_direction = 1
self.alien_points = 50
def increase_speed(self):
self.ship_speed_factor *= self.speedup_scale
self.bullet_speed_factor *= self.speedup_scale
self.alien_speed_factor *= self.speedup_scale
self.alien_points = (int)(self.alien_points*self.score_scale)
import pygame
from pygame.sprite import Sprite
class Ship(Sprite):
def __init__(self,ai_settings,screen):
super(Ship,self).__init__()
self.screen = screen
self.ai_settings = ai_settings
self.image = pygame.image.load('images/ship.bmp')
self.rect = self.image.get_rect()
self.screen_rect = screen.get_rect()
self.rect.centerx = self.screen_rect.centerx
self.rect.bottom = self.screen_rect.bottom
self.center = float(self.rect.centerx)
self.moving_right = False
self.moving_left = False
def update(self):
if self.moving_right and self.rect.right < self.screen_rect.right:
self.center += self.ai_settings.ship_speed_factor
if self.moving_left and self.rect.left > 0:
self.center -= self.ai_settings.ship_speed_factor
self.rect.centerx = self.center
def blitme(self):
self.screen.blit(self.image,self.rect)
def center_ship(self):
self.center = self.screen_rect.centerx
import pygame
from pygame.sprite import Sprite
class Alien(Sprite):
def __init__(self,ai_settings,screen):
super(Alien,self).__init__()
self.screen = screen
self.ai_settings = ai_settings
self.image = pygame.image.load('images/alien.bmp')
self.rect = self.image.get_rect()
self.rect.x = self.rect.width
self.rect.y = self.rect.height
self.x = float(self.rect.x)
def check_edges(self):
screen_rect = self.screen.get_rect()
if self.rect.right >= screen_rect.right:
return True
elif self.rect.left <= 0:
return True
else:
return False
def update(self):
self.x += self.ai_settings.alien_speed_factor*self.ai_settings.fleet_direction
self.rect.x = self.x
def blitme(self):
self.screen.blit(self.image,self.rect)
game_stats.py
class GameStats():
def __init__(self,ai_settings):
self.ai_settings = ai_settings
self.reset_stats()
self.game_active = False
self.high_score = 0
def reset_stats(self):
self.ships_left = self.ai_settings.ships_limit
self.score = 0
self.level = 1
import pygame.font
from pygame.sprite import Group
from ship import Ship
class Scoreboard():
def __init__(self,ai_settings,screen,stats):
self.screen = screen
self.screen_rect = screen.get_rect()
self.ai_settings = ai_settings
self.stats = stats
self.text_color = (30,30,30)
self.font = pygame.font.SysFont(None,48)
self.prep_score()
self.prep_high_score()
self.prep_level()
self.prep_ships()
def prep_score(self):
rounded_score = int(round(self.stats.score,-1))
score_str = "{:,}".format(rounded_score)
self.score_image = self.font.render(score_str,True,self.text_color,self.ai_settings.bg_color)
self.score_rect = self.score_image.get_rect()
self.score_rect.right = self.screen_rect.right - 20
self.score_rect.top = 20
def prep_high_score(self):
high_score = int(round(self.stats.high_score,-1))
high_score_str = "{:,}".format(high_score)
self.high_score_image = self.font.render(high_score_str,True,self.text_color,self.ai_settings.bg_color)
self.high_score_rect = self.high_score_image.get_rect()
self.high_score_rect.centerx = self.screen_rect.centerx
self.high_score_rect.top = self.score_rect.top
def prep_level(self):
self.level_image = self.font.render(str(self.stats.level),True,self.text_color,self.ai_settings.bg_color)
self.level_rect = self.level_image.get_rect()
self.level_rect.right = self.score_rect.right
self.level_rect.top = self.score_rect.bottom + 10
def prep_ships(self):
self.ships = Group()
for ship_number in range(self.stats.ships_left):
ship = Ship(self.ai_settings,self.screen)
ship.rect.x = 10+ship_number*ship.rect.width
ship.rect.y = 10
self.ships.add(ship)
def show_score(self):
self.screen.blit(self.score_image,self.score_rect)
self.screen.blit(self.high_score_image,self.high_score_rect)
self.screen.blit(self.level_image,self.level_rect)
self.ships.draw(self.screen)
game_functions.py
import pygame
import game_functions as gf
from settings import Settings
from ship import Ship
from alien import Alien
from pygame.sprite import Group
from game_stats import GameStats
from button import Button
from scoreboard import Scoreboard
def run_game():
pygame.init()
ai_settings = Settings()
screen = pygame.display.set_mode(
(ai_settings.screen_width,ai_settings.screen_height))
pygame.display.set_caption("Alien Invasion")
ship = Ship(ai_settings,screen)
bullets = Group()
aliens = Group()
gf.create_fleet(ai_settings,screen,ship,aliens)
stats = GameStats(ai_settings)
play_button = Button(ai_settings,screen,"Play")
sb = Scoreboard(ai_settings,screen,stats)
while True:
gf.check_events(ai_settings,screen,stats,sb,play_button,ship,aliens,bullets)
if stats.game_active:
ship.update()
gf.update_bullets(ai_settings,screen,stats,sb,ship,aliens,bullets)
gf.update_aliens(ai_settings,screen,stats,sb,ship,aliens,bullets)
gf.update_screen(ai_settings,screen,stats,sb,ship,aliens,bullets,play_button)
run_game()
import pygame
from pygame.sprite import Sprite
class Bullet(Sprite):
def __init__(self,ai_settings,screen,ship):
super(Bullet,self).__init__()
self.screen = screen
self.rect = pygame.Rect(0,0,ai_settings.bullet_width,ai_settings.bullet_height)
self.rect.centerx = ship.rect.centerx
self.rect.top = ship.rect.top
self.y = float(self.rect.y)
self.color = ai_settings.bullet_color
self.speed_factor = ai_settings.bullet_speed_factor
def update(self):
self.y -= self.speed_factor
self.rect.y = self.y
def draw_bullet(self):
pygame.draw.rect(self.screen,self.color,self.rect)
import pygame.font
class Button():
def __init__(self,ai_settings,screen,msg):
self.screen = screen
self.screen_rect = screen.get_rect()
self.width,self.height = 200,50
self.button_color = (0,255,0)
self.text_color = (255,255,255)
self.font = pygame.font.SysFont(None,48)
self.rect = pygame.Rect(0,0,self.width,self.height)
self.rect.center = self.screen_rect.center
self.prep_msg(msg)
def prep_msg(self,msg):
self.msg_image = self.font.render(msg,True,self.text_color,self.button_color)
self.msg_image_rect = self.msg_image.get_rect()
self.msg_image_rect.center = self.rect.center
def draw_button(self):
self.screen.fill(self.button_color,self.rect)
self.screen.blit(self.msg_image,self.msg_image_rect)