[英]Pygame event bug
我最近開始在 pygame 中制作 Snake。 首先,我在沒有面向對象編程的情況下編寫代碼。 當我注意到類會更好看時,我編輯了代碼。 現在前 3 次,蛇正常移動,但是當我按下向左箭頭或向右箭頭或向下箭頭時,蛇向下移動。 當我沒有課時,該程序按其應有的方式運行。 現在沒有了。 你能幫助我嗎?
這是我的代碼:
import pygame, math, random
pygame.init()
screen = pygame.display.set_mode((640,640))
pygame.display.set_caption('Snake')
class Snake(object):
def __init__(self):
self.x, self.y = 320,320
self.dirUp, self.dirDown = False, False
self.dirLeft, self.dirRight = False, False
self.body = [(self.x, self.y)]
self.snakeImg = [pygame.image.load('snakeblock.png') for i in range(len(self.body))]
snake = Snake()
squares = []
for i in range(640):
if i % 32 == 0:
squares.append(i)
food = pygame.image.load('fruit.png')
foodx,foody = random.choice(squares), random.choice(squares)
def isCollision(obsX, obsY, x, y):
# D I S T A N C E
return math.sqrt(math.pow(obsX - x, 2) + math.pow(obsY - y, 2)) <= 0
over_font = pygame.font.Font('freesansbold.ttf',64)
score_font = pygame.font.Font('freesansbold.ttf',32)
score = 0
def show_text():
score_text = score_font.render('Score: {}'.format(score), True, (255,255,255))
over_text = over_font.render('GAME OVER', True, (255,255,255))
screen.blit(score_text, (0,0))
running = True
while running:
pygame.time.delay(160)
screen.fill((0,128,0))
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_UP:
snake.dirUp = True
snake.dirLeft, dirDown, dirRight = False, False, False
if event.key == pygame.K_DOWN:
snake.dirDown = True
snake.dirUp, dirLeft, dirRight = False, False, False
if event.key == pygame.K_RIGHT:
snake.dirRight = True
snake.dirUp, dirDown, dirLeft = False, False, False
if event.key == pygame.K_LEFT:
snake.dirLeft = True
snake.dirUp, dirDown, dirRight = False, False, False
if snake.dirUp:
snake.y -= 32
elif snake.dirDown:
snake.y += 32
elif snake.dirRight:
snake.x += 32
elif snake.dirLeft:
snake.x -= 32
for i in range(len(snake.body)):
if isCollision(foodx,foody,snake.body[i][0],snake.body[i][1]):
foodx, foody = random.choice(squares), random.choice(squares)
score += 1
screen.blit(food, (foodx, foody))
screen.blit(snake.snakeImg[i], (snake.x, snake.y))
show_text()
pygame.display.update()
問題就在這里
snake.dirLeft, dirDown, dirRight = False, False, False
應該是
snake.dirLeft, snake.dirDown, snake.dirRight = False, False, False
在 python 中,除非您從元組/列表中解壓值,否則不建議使用多個賦值。 如您所見,這將更具可讀性:)
snake.dirLeft = False
snake.dirDown = False
snake.dirRight = False
還有另一個問題,因為蛇在創建 Snake 實例的那一刻使他的身體坐標靜止,這是可能的解決方案
class Snake(object):
def __init__(self):
self.x, self.y = 320, 320
self.dirUp, self.dirDown = False, False
self.dirLeft, self.dirRight = False, False
self.snakeImg = [pygame.image.load('snakeblock.png')
for i in range(len(self.body))]
@property
def body(self):
return [(self.x, self.y)]
但是你還是得想辦法增加它的體型
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