save project

show5-整条蛇移动.py

+#整条蛇移动，列表的用法
+#整条蛇移动，列表的用法
+import pygame
+from pygame import locals
+pygame.init()
+FPSCLOCK = pygame.time.Clock()
+screen= pygame.display.set_mode((660,480))
+
+background = pygame.image.load('bg.png')   
+right = pygame.image.load('right.png')
+body = pygame.image.load('body.png')
+down = pygame.image.load('down.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png') #加载蛇身素材     
+
+x, y = 240, 120
+
+snake = [(180, 90), (180, 120), (210, 120), (x, y)] #为蛇身做一个列表,
+#print(snake) #显示一下snake坐标,用于区分列表在不同环节的变化情况
+
+# x, y = 240, 320 #实验改变变量值是否改变列表
+# print(snake)
+# x，y如同两个装货卡车，我现在用x车和y车上的物品填充列表，将列表赋值给snake，在随后xy车上的货物改变后
+# 列表里对应位置的货物不会改变的，只有再次赋值的时候才会从xy车上取更新的货物。
+
+setheading = "right"
+snake_head = right
+
+while True:
+    for event in pygame.event.get():
+        if event.type == locals.QUIT:  
+            exit()
+    
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_w and setheading !="down":
+                setheading = 'up'
+                snake_head = up
+            if event.key == locals.K_a and setheading !="right":
+                setheading = 'left'
+                snake_head = left
+            if event.key == locals.K_s and setheading !="up":
+                setheading = 'down'
+                snake_head =  down
+            if event.key == locals.K_d and setheading !="left":
+                setheading = 'right'
+                snake_head = right
+
+    if setheading == 'up':
+        y -= 30
+    elif setheading == 'left':
+        x -= 30
+    elif setheading == 'right':
+        x += 30
+    else:
+        y += 30
+    # print(x)
+    # print(snake)#显示一下snake坐标,用于区分列表在不同环节的变化情况
+    # 随着x增加，在列表加尾去头，实现整体移动
+    snake.append((x, y))
+    snake.pop(0)
+    # print(snake)#显示一下snake坐标,用于区分列表在不同环节的变化情况
+    
+    
+    
+    screen.blit(background, (0, 0))
+    screen.blit(snake_head, snake[-1]) 
+# 如何渲染蛇身
+    # screen.blit(body, (210, 120))
+    # screen.blit(body, (180, 120))
+    # screen.blit(body, (180, 90))
+    # screen.blit(body,snake[-2])
+    # screen.blit(body,snake[-3])
+    # screen.blit(body,snake[-4])
+    #蛇身增加了怎么办，试着用遍历渲染蛇身
+    # screen.blit(body,snake[2])
+    # screen.blit(body,snake[1])
+    # screen.blit(body,snake[0])
+    # 可写成如下：
+    for i in range(len(snake)-1):
+        screen.blit(body, snake[i])
+
+    pygame.display.update()
+    FPSCLOCK.tick(3) 
+
+
+#通过print显示snake坐标,可以得到结论，只改变x值并不给相关列表元素赋值？？append可以增加列表元素赋值
+#蛇能动了之后，如何用按键控制蛇移动方向
+

snake.py

+import pygame
+from pygame import locals
+
+# 初始化pygame，为使用硬件做准备
+pygame.init()
+
+# 创建一个窗口
+screen = pygame.display.set_mode((660, 480))
+
+# 背景
+background = pygame.image.load('bg.png')
+right = pygame.image.load('right.png')
+food = pygame.image.load('apple.png')
+body = pygame.image.load('body.png')
+down = pygame.image.load('down.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+
+
+
+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()
+    # 将背景图画上去
+    screen.blit(background, (0, 0))
+    # 将贪吃蛇画上去
+    screen.blit(right, (240, 120))
+    # 将贪吃蛇的身体画上去
+    screen.blit(body, (210, 120))
+    screen.blit(body, (180, 120))
+    screen.blit(body, (180, 90))
+    # 将果实画上去
+    screen.blit(food, (360, 300))
+    # 刷新画面
+    pygame.display.update()
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