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snake.py

@@ -6,27 +6,71 @@ pygame.init()
 
 
 # 创建一个窗口
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
 screen = pygame.display.set_mode((660, 480))
-
+FPSCLOCK = pygame.time.Clock() #计时器
 # 背景
 # 背景
 background = pygame.image.load('bg.png')
 background = pygame.image.load('bg.png')
+
 right = pygame.image.load('right.png')
 right = pygame.image.load('right.png')
+up = pygame.image.load('up.png')
+left = pygame.image.load('left.png')
+down = pygame.image.load('down.png')
+
 food = pygame.image.load('apple.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 body = pygame.image.load('body.png')
 
 
+
+x = 240 #蛇头初始坐标
+y = 120 #蛇头初始坐标
+
+setheading = 'right' #蛇头朝向
+snake_head = right  #蛇头造型
+
+position = [(210, 120),(180, 120),(180, 90),(x, y)] #蛇的位置坐标
+
 while True:
 while True:
     for event in pygame.event.get():
     for event in pygame.event.get():
         if event.type == locals.QUIT:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             # 接收到退出事件后退出程序
             exit()
             exit()
+        if event.type == locals.KEYDOWN:  #获取事件类型
+            if event.key == locals.K_RIGHT and setheading != 'left': #判断是否按下右键且此时朝向不为左
+                setheading = 'right'
+                snake_head = right
+            if event.key == locals.K_LEFT and setheading != 'right':
+                setheading = 'left'
+                snake_head = left
+            if event.key == locals.K_UP and setheading != 'down':
+                setheading = 'up'
+                snake_head = up
+            if event.key == locals.K_DOWN and setheading != 'up':
+                setheading = 'down'
+                snake_head = down
+
+    if setheading == 'right':
+        x += 30
+    elif setheading == 'left':
+        x -= 30
+    elif setheading == 'up':
+        y -= 30
+    else:
+        y += 30
+
+    position.append((x,y)) #添加蛇头的新坐标
+    position.pop(0)#删除身体末尾的旧坐标
     # 将背景图画上去
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))
+
     # 将贪吃蛇画上去
     # 将贪吃蛇画上去
-    screen.blit(right, (240, 120))
+    screen.blit(snake_head, (x, y))
+
     # 将贪吃蛇的身体画上去
     # 将贪吃蛇的身体画上去
-    screen.blit(body, (210, 120))
-    screen.blit(body, (180, 120))
-    screen.blit(body, (180, 90))
+    for i in range(len(position)-1):
+        screen.blit(body,position[i])
+    # screen.blit(body, (210, 120))
+    # screen.blit(body, (180, 120))
+    # screen.blit(body, (180, 90))
     # 将果实画上去
     # 将果实画上去
     screen.blit(food, (360, 300))
     screen.blit(food, (360, 300))
     # 刷新画面
     # 刷新画面
     pygame.display.update()
     pygame.display.update()
+    FPSCLOCK.tick(3) #控制帧数，不超过3
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