我正在制作一个蛇游戏，到目前为止，它基本上进展顺利，但它在左上角显示了一块我无法摆脱的蛇。我检查了一下，我没有在那里画曲面(0,0(。我被卡住了。请帮帮我，谢谢！！
顺便说一句，这是我第一次问问题，所以任何关于这个问题的建议也很感激。
Edit：我发现使用常规类而不是sprite解决了问题，但我需要sprite中的碰撞和其他函数。
import pygame
class snake(pygame.sprite.Sprite):
speed=5
init_length=10
direction=0
x=[]
y=[]
updateCountMax = 2
updateCount = 0
length=10
# image=pygame.Surface((11,11)).convert().fill((0,128,255))
def __init__(self,init_x,init_y,image,screen):
pygame.sprite.Sprite.__init__(self)
for i in range(0,self.init_length):
self.x.append(init_x)
self.y.append(init_y)
# for i in range(0,self.length):
# print(f"{self.x[i]},{self.y[i]}")
for x in self.x:
print(x)
for y in self.y:
print(y)
self.image=image
self.screen=screen
self.rect=self.image.get_rect()
# self.rect.center=(self.x,self.y)
def move_R(self):
# self.x+=self.speed
self.direction=0
def move_L(self):
# self.x-=self.speed
self.direction=1
def move_U(self):
# self.y-=self.speed
self.direction=2
def move_D(self):
# self.y+=self.speed
self.direction=3
def update(self):
# self.updateCount = self.updateCount + 1
# if self.updateCount < self.updateCountMax:
for i in range(self.length-1,0,-1):
# print("self.x[" + str(i) + "] = self.x[" + str(i-1) + "]")
self.x[i] = self.x[i-1]
self.y[i] = self.y[i-1]
if(self.direction==0):
self.x[0]+=self.speed
elif(self.direction==1):
self.x[0]-=self.speed
elif(self.direction==2):
self.y[0]-=self.speed
elif(self.direction==3):
self.y[0]+=self.speed
# self.rect.center=(self.x,self.y)
# self.updateCount = 0
# for i in range(0,self.length):
# print(f"{self.x[i]},{self.y[i]}")
self.draw()
def draw(self):
for i in range(0,self.length):
self.screen.blit(self.image,(self.x[i],self.y[i]))
# print(f"rendered at {self.x[i]},{self.y[i]}")
# self.rect.center=(self.x[i],self.y[i])
class app:
width=1200
height=900
title="Snake"
done=False
def __init__(self):
pygame.init()
self.image=pygame.Surface((11,11))
self.image.fill((0,128,255))
pygame.display.set_caption(self.title)
self.screen = pygame.display.set_mode((self.width, self.height))
self.screen.fill((0,0,0))
self.clock=pygame.time.Clock()
self.snakes=pygame.sprite.Group()
self.player1=snake(500,10,self.image,self.screen)
self.snakes.add(self.player1)
self.background = pygame.Surface(self.screen.get_size())
self.background = self.background.convert()
self.background.fill((255,255,255))
def loop(self):
while(not self.done):
for event in pygame.event.get():
if event.type == pygame.QUIT:
self.done = True
pygame.event.pump()
keys = pygame.key.get_pressed()
if (keys[pygame.K_RIGHT]):
self.player1.move_R()
if (keys[pygame.K_LEFT]):
self.player1.move_L()
if (keys[pygame.K_UP]):
self.player1.move_U()
if (keys[pygame.K_DOWN]):
self.player1.move_D()
if (keys[pygame.K_ESCAPE]):
self.done = True
self.screen.blit(self.background,(0,0))
self.screen.fill((0,0,0))
self.player1.update()
self.snakes.draw(self.screen)
pygame.display.update()
self.clock.tick(60)
pygame.quit()
if __name__ == "__main__" :
theApp = app()
theApp.loop()
将player1添加到snakes精灵组中，并使用self.snakes.draw(self.screen)绘制。但是，您也在self.player1.update()中的最后一行绘制玩家。
移除self.snakes.draw(self.screen)以移除幻影蛇。
BTW：你创建并设置了一个self.background，但你会立即用self.screen.fill((0,0,0))覆盖它，所以你根本不需要背景。
您在左上角看到的是player1精灵的self.image。子画面组的draw方法在子画面的rect.topleft坐标处对image进行闪电扫描，由于从未移动player1.rect，因此图像将在默认(0，0(坐标处进行闪电扫描。因此，只需删除线路self.snakes.draw(self.screen)即可解决此问题。
我还建议您使用pygame.Rect，而不是self.x和self.y列表。您可以创建以init_x和init_y坐标作为topleft属性的rect实例，并将它们放入self.rects列表中。这允许您简化更新和绘制方法，rects也可以用于碰撞检测。我已经重构了你的代码(它有点像是一个小型代码审查(：
import pygame
class Snake(pygame.sprite.Sprite): # Use upper camelcase names for classes (see PEP 8).
def __init__(self, init_x, init_y, image,screen):
pygame.sprite.Sprite.__init__(self)
# These are instance attributes now (use class attributes if
# the values should be shared between the instances).
self.speed = 5
self.init_length = 10
self.direction = 0
self.updateCountMax = 2
self.updateCount = 0
self.length = 10
# The body parts are rects now.
self.rects = []
for i in range(self.init_length):
# Append pygame.Rect instances.
self.rects.append(pygame.Rect(init_x, init_y, 11, 11))
self.image = image
self.screen = screen
self.rect = self.rects[0] # I use the first rect as the self.rect.
def update(self):
for i in range(self.length-1, 0, -1):
# Update the topleft (x, y) positions of the rects.
self.rects[i].topleft = self.rects[i-1].topleft
if self.direction == 0:
self.rects[0].x += self.speed
elif self.direction == 1:
self.rects[0].x -= self.speed
elif self.direction == 2:
self.rects[0].y -= self.speed
elif self.direction == 3:
self.rects[0].y += self.speed
def draw(self):
# Iterate over the rects to blit them (I draw the outlines as well).
for rect in self.rects:
self.screen.blit(self.image, rect)
pygame.draw.rect(self.screen, (0, 255, 0), rect, 1)
class App:
width = 1200
height = 900
title = "Snake"
done = False
def __init__(self):
pygame.init()
self.image = pygame.Surface((11, 11))
self.image.fill((0, 128, 255))
pygame.display.set_caption(self.title)
self.screen = pygame.display.set_mode((self.width, self.height))
self.clock = pygame.time.Clock()
self.snakes = pygame.sprite.Group()
self.player1 = Snake(500, 10, self.image, self.screen)
self.snakes.add(self.player1)
def loop(self):
while not self.done:
# Handle the events.
for event in pygame.event.get():
if event.type == pygame.QUIT:
self.done = True
keys = pygame.key.get_pressed()
# In Python we simply set the values of the
# attributes directly instead of using getter
# and setter methods.
if keys[pygame.K_RIGHT]:
self.player1.direction = 0
if keys[pygame.K_LEFT]:
self.player1.direction = 1
if keys[pygame.K_UP]:
self.player1.direction = 2
if keys[pygame.K_DOWN]:
self.player1.direction = 3
if keys[pygame.K_ESCAPE]:
self.done = True
# Update the game.
self.player1.update()
# Draw everything.
self.screen.fill((0, 0, 0))
self.player1.draw()
pygame.draw.rect(self.screen, (255, 0, 0), self.player1.rect, 1)
pygame.display.update()
self.clock.tick(60)
pygame.quit()
if __name__ == "__main__" :
the_app = App()
the_app.loop()