save project

snake.py

@@ -3,8 +3,6 @@ from pygame import locals
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
-x=240
-y=120
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
 FPS=pygame.time.Clock()
@@ -13,21 +11,48 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
-
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
+x=240
+y=120
+position=[(180,90),(180,120),(210,120),(x,y)]
+setheading='right'
+snake_head=right
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-    x=x+30
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_RIGHT and setheading !='left':
+                setheading='right'
+                snake_head=right
+            if event.key==locals.K_LEFT and setheading !='right':
+                setheading='left'
+                snake_head=left
+                setheading='up'
+                snake_head=up
+            if event.key==locals.K_DOWN and setheading !='up':
+                setheading='down'
+                snake_head=down
+    if setheading == 'right':
+        x=x+30
+    if setheading == 'left':
+        x=x-30
+    if setheading == 'down':
+        y=y+30
+    if setheading == 'up':
+        y=y-30
+    position.append((x,y))
+    position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (x,y))
+    screen.blit(snake_head, position[-1])
     # 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]))
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面