settings

settings.py

@@ -0,0 +1,54 @@
+class Settings():
+    """存储《外星人入侵》的所有的设置的类"""
+
+    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_limits = 3
+
+        # 子弹的设置
+        self.bullet_speed_factor = 3
+        self.bullet_width = 300
+        self.bullet_height = 15
+        self.bullet_color = 60, 60, 60
+        self.bullets_allowed = 20
+
+        # 外星人设置
+        self.alien_speed_factor = 1
+        self.fleet_drop_speed = 10
+        # fleet_direction为1表示向右移动，为-1表示向左移动
+        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
+
+        # fleet_direction 为1表示向左， -1表示向右
+        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.alien_speed_factor *= self.speedup_scale
+        self.bullet_speed_factor *= self.speedup_scale
+
+        self.alien_points = int(self.alien_points * self.score_scale)
+
+