我刚刚开始学习python并尝试了蛇游戏，但遇到了一个问题。当我运行程序并使蛇向左移动时，我可以向右移动它并使其崩溃。上下都一样。我要制造它，使蛇不能向后撞到自己。另外，当我让蛇走出边界时，它不会死，只会从另一面墙穿过。例如，如果我的蛇从右壁伸出，它将从另一侧的左边穿过。
import pygame
import math
import random
import tkinter as tk
from tkinter import messagebox
from pygame.locals import *
import time
pygame.display.set_caption('SNAKE GAME!!! HAVE FUN PLAYING')
class cube(object):
rows = 30
w = 750
def __init__(self,start,dirnx=1,dirny=0,color=(30,144,255)):
self.pos = start
self.dirnx = 1
self.dirny = 0
self.color = color
def move(self,dirnx,dirny):
self.dirnx = dirnx
self.dirny = dirny
self.pos = (self.pos[0] + self.dirnx, self.pos[1] + self.dirny)
def draw(self,surface,eyes=False):
dis = self.w //self.rows
i = self.pos[0]
j = self.pos[1]
pygame.draw.rect(surface,self.color, (i*dis+1, j*dis+1, dis-2, dis-2))
if eyes:
centre = dis//2
radius = 3
circleMiddle = (i*dis+centre-radius,j*dis+8)
circleMiddle2 = (i*dis+dis-radius*2, j*dis+8)
pygame.draw.circle(surface, (0,128,0), circleMiddle, radius)
pygame.draw.circle(surface, (0,128,0), circleMiddle2, radius)
class snake(object):
body= []
turns = {}
def __init__(self,color,pos):
self.color = color
self.head = cube(pos)
self.body.append(self.head)
self.dirnx = 0
self.dirny = 1
def move(self):
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
keys = pygame.key.get_pressed()
for key in keys:
if keys[pygame.K_LEFT]:
self.dirnx = -1
self.dirny = 0
self.turns[self.head.pos[:]] = [self.dirnx, self.dirny]
elif keys[pygame.K_RIGHT]:
self.dirnx = 1
self.dirny = 0
self.turns[self.head.pos[:]] = [self.dirnx, self.dirny]
elif keys[pygame.K_UP]:
self.dirnx = 0
self.dirny = -1
self.turns[self.head.pos[:]] = [self.dirnx, self.dirny]
elif keys[pygame.K_DOWN]:
self.dirnx = 0
self.dirny = 1
self.turns[self.head.pos[:]] = [self.dirnx, self.dirny]
for i, c in enumerate(self.body):
p = c.pos[:]
if p in self.turns:
turn = self.turns[p]
c.move(turn[0], turn[1])
if i == len(self.body) - 1:
self.turns.pop(p)
else:
if c.dirnx == -1 and c.pos[0] <= 0:
c.pos = (c.rows - 1, c.pos[1])
elif c.dirnx == 1 and c.pos[0] >= c.rows - 1:
c.pos = (0, c.pos[1])
elif c.dirny == 1 and c.pos[1] >= c.rows - 1:
c.pos = (c.pos[0], 0)
elif c.dirny == -1 and c.pos[1] <= 0:
c.pos = (c.pos[0], c.rows - 1)
else:
c.move(c.dirnx, c.dirny)
def reset(self,pos):
self.head = cube(pos)
self.body = []
self.body.append(self.head)
self.turns = {}
self.dirnx = 0
self.dirny = 1
def addCube(self):
tail = self.body[-1]
dx,dy = tail.dirnx, tail.dirny
if dx == 1 and dy == 0:
self.body.append(cube((tail.pos[0]-1,tail.pos[1])))
elif dx == -1 and dy == 0:
self.body.append(cube((tail.pos[0]+1, tail.pos[1])))
elif dx == 0 and dy == 1:
self.body.append(cube((tail.pos[0], tail.pos[1]-1)))
elif dx == 0 and dy == -1:
self.body.append(cube((tail.pos[0], tail.pos[1]+1)))
self.body[-1].dirnx = dx
self.body[-1].dirny = dy
def draw(self,surface):
for i,c in enumerate(self.body):
if i == 0:
c.draw(surface, True)
else:
c.draw(surface)
def drawGrid(w,rows,surface):
sizeBtwn = w // rows
x = 0
y = 0
for l in range(rows):
x = x + sizeBtwn
y = y + sizeBtwn
pygame.draw.line(surface,(255,255,255),(x,0),(x,w))
pygame.draw.line(surface,(255,255,255),(0,y),(w,y))
def redrawWindow(surface):
global rows,width,s,snack
surface.fill((154,205,50))
s.draw(surface)
snack.draw(surface)
drawGrid(width,rows,surface)
pygame.display.update()
def randomSnack(rows,item):
positions = item.body
while True:
x = random.randrange(rows)
y = random.randrange(rows)
if len(list(filter(lambda z:z.pos == (x,y), positions)))>0:
continue
else:
break
return (x,y)
def message_box(subject,content):
root = tk.Tk()
root.attributes("-topmost", True)
root.withdraw()
messagebox.showinfo(subject,content)
try:
root.destroy()
except:
pass
def main():
global width,rows,s,snack
width = 750
height = 500
rows = 30
win = pygame.display.set_mode((width,width))
s = snake((30,144,255),(10,10))
snack = cube(randomSnack(rows,s), color=(255,0,0))
flag = True
clock = pygame.time.Clock()
while flag:
pygame.time.delay(1)
clock.tick(10)
s.move()
if s.body[0].pos == snack.pos:
s.addCube()
snack = cube(randomSnack(rows,s), color=(255,0,0))
for x in range(len(s.body)):
if s.body[x].pos in list(map(lambda z: z.pos, s.body[x + 1:])):
print('Score: ', len(s.body))
score = str(len(s.body))
s.reset((10, 15))
pygame.display.set_caption("Score:", score)
redrawWindow(win)
pass
main()
请帮助！
答案 0 :(得分：3)
首先-当有Sprites而不是简单的对象类时，阅读pygame代码要容易得多。 其次-您的示例远远大于应有的示例-请保持简单，将其限制在实际问题上。
为了阻止蛇以相反的方式杀死自己，我看到了两种解决方案：
pygame.K_UP时，方向不会更改，并且省略了键）< / li>
为了杀死一条蛇，当它撞到边界时-在一条蛇move()方法中，您应该检查立方体是否撞到边界以及何时撞到该边界-杀死蛇而不是杀死蛇将立方体的位置移到板子的另一侧。