[学习内容]外星人入侵项目实践

MingMingWu · MingMingWu · commit 78a738498b54 · 2017-05-17T02:20:30.000+08:00
1.飞船移动
 2.飞船设置移动速度
 3.飞船设置移动边界
diff --git a/alien_invasion.py b/alien_invasion.py
@@ -5,12 +5,13 @@
 import pygame
 from settings import Settings
 from ship import Ship
-
+import game_functions as gf
 
 def run_game():
     """初始化游戏并创建一个屏幕对象"""
     pygame.init()
     ai_settings = Settings()
+
     scrren = pygame.display.set_mode((ai_settings.scrren_width, ai_settings.scrren_height))
     pygame.display.set_caption("Alien Invasion")
 
@@ -19,22 +20,16 @@ def run_game():
 
 #   创建一艘飞船
     ship = Ship(scrren)
+    ship.set_move_speed(5)
 
 #   开始游戏的主循环
     while True:
+        # 监视键盘和鼠标事件
+        gf.check_event(ship)
 
-#         监视键盘和鼠标事件
-        for event in pygame.event.get():
-            if event.type == pygame.QUIT:
-                sys.exit()
-
-#       每次循环时都重绘屏幕
-        scrren.fill(ai_settings.bg_color)
-        ship.blitme()
-
-#       让最近绘图的屏幕可见
-        pygame.display.flip()
-
+        # 每次循环时都重绘屏幕
+        gf.update_scrren(ai_settings, scrren, ship)
+        ship.update()
 
 print run_game.__doc__
 run_game()
diff --git a/game_functions.py b/game_functions.py
@@ -0,0 +1,31 @@
+#coding: utf-8
+
+import sys
+import pygame
+
+
+def check_event(ship):
+    #监视键盘和鼠标事件
+    for event in pygame.event.get():
+        if pygame.QUIT == event.type:
+            sys.exit()
+        elif pygame.KEYDOWN == event.type:
+            if pygame.K_RIGHT == event.key:
+                #向右移动飞船
+                ship.moving('right')
+                ship.update()
+            if pygame.K_LEFT == event.key:
+                #向左移动飞船
+                ship.moving('left')
+                ship.update()
+        elif pygame.KEYUP == event.type:
+            ship.stop()
+
+def update_scrren(ai_settings, scrren, ship):
+    """更新屏幕上的图像"""
+    # 每次循环时都重绘屏幕
+    scrren.fill(ai_settings.bg_color)
+    ship.blitme()
+
+    #让最近绘图的屏幕可见
+    pygame.display.flip()
diff --git a/settings.py b/settings.py
@@ -12,4 +12,9 @@ def __init__(self):
         self.scrren_height = 800
         self.bg_color = (100, 100, 100)
 
+    def set_ship(self, ship, speed):
+        ship.set_move_speed(speed)
+
+class Setting_Ship():
+    """飞船通用设置集合"""
 
diff --git a/ship.py b/ship.py
@@ -11,12 +11,43 @@ def __init__(self, scrren):
         self.image = pygame.image.load('ship.png')
         self.rect = self.image.get_rect()
         self.scrren_rect = scrren.get_rect()
+        # 持续移动标志
+        self.__moving_riht = False
+        self.__moving_left = False
+        self.speed_factor = 1
 
-#       将每艘飞船防止在屏幕底部中央
-        self.rect.centerx = self.scrren_rect.centerx
+        # 将每艘飞船防止在屏幕底部中央
+        self.rect.centerx = (self.scrren_rect.right + self.scrren_rect.left) / 2
         self.rect.bottom = self.scrren_rect.bottom
+        self.self_center = self.rect.centerx
+
 
     def blitme(self):
         """在指定位置放置飞船"""
         self.scrren.blit(self.image, self.rect)
 
+    def update(self):
+        """根据移动标志调整飞船的位置"""
+
+        if True == self.__moving_riht and self.rect.right < self.scrren_rect.right:
+            self.self_center += self.speed_factor
+
+        if True == self.__moving_left and self.rect.left > self.scrren_rect.left:
+            self.self_center -= self.speed_factor
+
+        self.rect.centerx = self.self_center
+
+    def moving(self, direction):
+        if 'left' == direction:
+            self.__moving_left = True
+        elif 'right' == direction:
+            self.__moving_riht = True
+
+    def stop(self):
+        """停止移动,将移动标志位都设置为FALSE"""
+        self.__moving_left = False
+        self.__moving_riht = False
+
+    def set_move_speed(self, speed):
+        """设置飞船移动速度"""
+        self.speed_factor = float(speed)
