外星人入侵全代码版(二)
游戏介绍
在游戏《外星人入侵》中,玩家控制着一艘最初出现在屏幕底部中央的飞船。玩家 可以使用箭头键左右移动飞船,还可使用空格键进行射击。游戏开始时,一群外星人出 现在天空中,他们在屏幕中向下移动。玩家的任务是射杀这些外星人。玩家将所有外星 人都消灭干净后,将出现一群新的外星人,他们移动的速度更快。只要有外星人撞到了 玩家的飞船或到达了屏幕底部,玩家就损失一艘飞船。玩家损失三艘飞船后,游戏结束。
外星人的类
文件名:alien.py
import pygame as ga
from pygame.sprite import Sprite
class Alien(Sprite):
'''表示单个外星人的类'''
def __init__(self,ai_settings,screen):
'''初始化外星人并设置初始位置'''
super(Alien,self).__init__()
self.screen = screen
self.ai_settings = ai_settings
#加载外星人图像,并设置其rect属性
self.image = ga.image.load('images/alien.bmp')
self.rect = self.image.get_rect()
#每个外星人最初都在屏幕左上角附近
self.rect.x = self.rect.width
self.rect.y = self.rect.height
#存储外星人的准确位置
self.x = float(self.rect.x)
def blitme(self):
'''在指定位置绘制外星人'''
self.screen.blit(self.image, self.rect)
def check_edges(self):
'''如果外星人位于屏幕边缘,就返回True'''
screen_rect = self.screen.get_rect()
if self.rect.right >= screen_rect.right:
return True
elif self.rect.left <= 0 :
return True
def update(self):
'''向右或向左移动外星人'''
self.x += (self.ai_settings.alien_speed_factor * self.ai_settings.fleet_direction)
self.rect.x = self.x
子弹设置
文件名:bullet.py
#子弹设置
import pygame as ga
from pygame.sprite import Sprite
class Bullet(Sprite):
'''一个对飞船发射子弹进行管理的类'''
def __init__(self,ai_settings,screen,ship):
'''在飞船所处的位置创建一个子弹对象'''
super(Bullet, self).__init__()
self.screen = screen
#在(0,0)处创建一个表示子弹的矩形,再设置正确的位置
self.rect = ga.Rect(0,0,ai_settings.bullet_width,
ai_settings.bullet_height)
self.rect.centerx = ship.rect.centerx
self.rect.top = ship.rect.top
#存储用小数表示的子弹位置
self.y = float(self.rect.y)
self.color = ai_settings.bullet_color
self.speed_factor = ai_settings.bullet_speed_factor
def update(self):
'''向上移动子弹'''
#更新表示子弹位数的小数值
self.y -= self.speed_factor
#更新表示子弹的rect位置
self.rect.y = self.y
def draw_bullet(self):
'''在屏幕上绘制子弹'''
ga.draw.rect( self.screen, self.color, self.rect)
按钮
文件名:button.py
#创建按钮
import pygame as ga
class Button():
def __init__(self, ai_settings, screen, msg):
'''初始化按钮属性'''
self.screen = screen
self.screen_rect = screen.get_rect()
#设置按钮的属性和尺寸
self.width, self.height = 200,50
self.button_color = (0, 255, 0)
self.text_color = (255, 255, 255)
self.font = ga.font.SysFont(None, 48)
#创建按钮的rect对象,并使其居中
self.rect = ga.Rect(0, 0, self.width, self.height)
self.rect.center = self.screen_rect.center
#按钮标签只需创建一次
self.prep_msg(msg)
def prep_msg(self,msg):
'''将msg渲染为图像,并使其在按钮上居中'''
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):
#绘制一个用颜色填充的按钮,再绘制文本
self.screen.fill(self.button_color, self.rect)
self.screen.blit(self.msg_image, self.msg_image_rect)
计分(最高分,当前分)类
文件名:scoreboard.py
import pygame.font
from pygame.sprite import Group
from ship import Ship
class Scoreboard():
"""A class to report scoring information."""
def __init__(self, ai_settings, screen, stats):
"""Initialize scorekeeping attributes."""
self.screen = screen
self.screen_rect = screen.get_rect()
self.ai_settings = ai_settings
self.stats = stats
# Font settings for scoring information.
self.text_color = (30, 30, 30)
self.font = pygame.font.SysFont(None, 48)
# Prepare the initial score images.
self.prep_score()
self.prep_high_score()
self.prep_level()
self.prep_ships()
def prep_score(self):
"""Turn the score into a rendered image."""
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)
# Display the score at the top right of the screen.
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):
"""Turn the high score into a rendered image."""
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)
# Center the high score at the top of the screen.
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):
"""Turn the level into a rendered image."""
self.level_image = self.font.render(str(self.stats.level), True,
self.text_color, self.ai_settings.bg_color)
# Position the level below the score.
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):
"""Show how many ships are left."""
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):
"""Draw score to the screen."""
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)
# Draw ships.
self.ships.draw(self.screen)
类的设置
文件名:settings.py
#类的设置
class Settings():
'''存储所有设置的类'''
def __init__(self):
'''初始化游戏的静态设置'''
#屏幕设置
self.screen_width = 1200
self.screen_height = 800
self.bg_color = (230, 230, 230)
#飞船的设置
#self.ship_speed_factor = 1.5
self.ship_limit = 3
#子弹设置
#self.bullet_speed_factor = 3
self.bullet_width = 3
self.bullet_height = 15
self.bullet_color = 60,60,60
self.bullets_allowed = 3
#外星人设置
#self.alien_speed_factor = 1
self.fleet_drop_speed = 10
#fleet_direction为1向右移为-1向左移
#self.fleet_direction = 1
#以什么样的速度加快游戏节奏
self.speedup_scale = 1.1
#外星人点数的提高速度
self.score_scale = 1.5
self.initialize_dynamic_settings()
def initialize_dynamic_settings(self):
'''初始化随游戏进行而变化的设置'''
self.ship_speed_factor = 1.5
self.bullet_speed_factor = 3
self.alien_speed_factor = 1
#得分
self.alien_points = 50
#fleet_direction为1表示向右;为-1表示向左
self.fleet_direction = 1
def increase_speed(self):
'''提高速度设置和外星人点数'''
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)
#print(self.alien_points)
飞船类
文件名:ship.py
# ship类(飞船)
import pygame as ga
from pygame.sprite import Sprite
class Ship(Sprite):
def __init__(self,ai_settings,screen):
'''初始化飞船并设置其初始位置'''
super(Ship, self).__init__()
self.screen = screen
self.ai_settings = ai_settings
#加载飞船图像并获取其外部矩形
self.image = ga.image.load('images/ship.bmp')
self.rect = self.image.get_rect()
self.screen_rect = screen.get_rect()
#将每艘飞船放在屏幕底部中央
self.rect.centerx = self.screen_rect.centerx
self.rect.bottom = self.screen_rect.bottom
#在飞船的属性center中存储小数值
self.center = float(self.rect.centerx)
#移动标志
self.moving_right = False
self.moving_left = False
def update(self):
'''根据移动标志调整飞船的位置'''
#重新飞船的center值而不是rect
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
#根据self.conter更新rect对象
self.rect.centerx = self.center
def blitme(self):
'''在指定位置绘制飞船'''
self.screen.blit(self.image, self.rect)
def center_ship(self):
'''让飞船在屏幕中间'''
self.center = self.screen_rect.centerx
图片
图片放在文件夹images中
就这么多啦,有问题请留言或私聊!