auto save

snake.py

 import pygame
+import random
 from pygame import locals
 
 # 初始化pygame，为使用硬件做准备
@@ -7,26 +8,93 @@ pygame.init()
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
 
+#pygame时钟，控制游戏速度（帧数）
+FPSCLOCK = pygame.time.Clock()
+#刷新速度n，默认为1
+n=1
+#改变速度特征s
+s=0
 # 背景
 background = pygame.image.load('bg.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')
 body = pygame.image.load('body.png')
+snakeHead = right
+my_font=pygame.font.Font('neuropol.ttf',18)   #创建字体对象
+score=0   #分数
+
+x = 240
+y = 120
+position = [(180,90),(180,120),(210,120),(x,y)]
+food_x = 360
+food_y = 300
+setheading = "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()
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_RIGHT and setheading != "left":
+                setheading = "right"
+                snakeHead = right
+            if event.key == locals.K_LEFT and setheading != "right":
+                setheading = "left"
+                snakeHead = left
+            if event.key == locals.K_UP and setheading != "down":
+                setheading = "up"
+                snakeHead = up
+            if event.key == locals.K_DOWN and setheading != "up":
+                setheading = "down"
+                snakeHead = down
+    #实现贪吃蛇移动，新增一个坐标，删除最先的坐标
+    if setheading=="right":
+        x=x+30
+    if setheading == "left":
+        x= x-30
+    if setheading == "up":
+        y=y-30
+    if setheading == "down":
+        y = y+30
+    if (x,y) in position:   #如果吃到自己，游戏结束
+        exit()
+    position.append((x,y))
+    
+    if x<0 or x>630 or y<0 or y>450:  #如果碰到墙，游戏结束
+        exit()
+
+    if food_x == x and food_y == y:
+        food_x = random.randint(5,15)*30
+        food_y = random.randint(5,10)*30
+        score = score + 10  #分数增加
+    else:
+        position.pop(0)
+    #根据蛇身体长度，改变刷新速度
+    # if n>4:
+    #     n=4
+    # else:
+    #     n = len(position)//5+1
+    
+
     # 将背景图画上去
     screen.blit(background, (0, 0))
-    # 将贪吃蛇画上去
-    screen.blit(right, (240, 120))
+    # 将贪吃蛇的头画上去
+    screen.blit(snakeHead, 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))
+    screen.blit(food, (food_x, food_y))
+    info='Score: '+str(score)   #分数信息
+    text=my_font.render(info,True,(0,0,0))  #展示分数信息
+    screen.blit(text,(500,30))   #刷新分数信息
     # 刷新画面
     pygame.display.update()
+    
+    FPSCLOCK.tick(n)
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