
class AlienSett():
    """存储所有设置的类"""

    def __init__(self):
        """初始化游戏的设置"""
        #屏幕设置
        self.screen_width = 450
        self.screen_height = 800
        self.bg_color = (0, 0, 0)

        #飞船的设置
        self.ship_limit = 3

        #子弹的设置
        self.bullet_width = 450
        self.bullet_height = 10
        self.bullet_color = 160, 160, 160
        self.bullets_allowd = 6

        #外星人设置
        self.fleet_drop_speed = 5

        #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_sett()

    def initialize_dynamic_sett(self):
        """初始化随游戏进行而变化的设置"""
        self.bullet_speed_factor = 3
        self.alien_speed_factor = 1
        self.ship_spped_factor = 1.5

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

        #计分
        self.alien_points = 50

    def increase_speed(self):
        """提高速度设置和外星人点数"""
        self.ship_spped_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)