settings.py

class Settings():
    """存储《外星人》的所有设置的类"""
    
    def __init__(self):
        """初始化游戏的静态设置"""
        # 屏幕设置
        self.screen_width = 500
        self.screen_height = 795
        self.bg_color = (195, 200 , 201)

        # 飞船的设置
        self.ship_limit = 3# 飞船生命

        # 子弹设置
        
        self.bullet_width = 5
        self.bullet_height = 15
        self.bullet_color = 239, 143, 40
        self.bullets_allowed = 8
        
        # 当撞到边缘时向下移动的速度
        self.fleet_drop_speed = 8
        

        # 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 = 0.5
        self.bullet_speed_factor = 0.5
        self.alien_speed_factor = 0.5
        self.background_speed_factor = 0.1

        # fleet_dirction为1表示向右，为-1表示向左
        self.fleet_direction = 1

        # 记分
        self.alien_points = 50

    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.background_speed_factor *= self.speedup_scale

        self.alien_points = int(self.alien_points * self.score_scale)