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snake.py

@@ -12,26 +12,56 @@ FPS = pygame.time.Clock()
 # 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')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.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
 x = 240
 y = 120
 y = 120
+snake = [(180, 90),(180, 120),(210, 120),(x,y)]
+heading = "right"
+snake_head = right
 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:
+            if event.key == locals.K_RIGHT and heading != "left":
+                heading = "right"
+                snake_head = right
+            if event.key == locals.K_LEFT and heading != "right":
+                heading = "left"
+                snake_head = left
+            if event.key == locals.K_UP and heading != "down":
+                heading = "up"
+                snake_head = up
+            if event.key == locals.K_DOWN and heading != "up":
+                heading = "down"
+                snake_head = down    
+
+
     # 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, (x, y))
-    x += 30
+    screen.blit(snake_head, (x, y))
+    if heading == "right":
+        x += 30
+    elif heading == "left":
+        x -= 30
+    elif heading == "up":
+        y -= 30
+    else:
+        y +=30
     # 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(snake)-1):
+        screen.blit(body, snake[i])
     # 将果实画上去
     # 将果实画上去
     screen.blit(food, (360, 300))
     screen.blit(food, (360, 300))
+
+    snake.append((x,y))
+    snake.pop(0)
     # 刷新画面
     # 刷新画面
     pygame.display.update()
     pygame.display.update()
     FPS.tick(3)
     FPS.tick(3)
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