python - 我试图用子弹击中永久 'kill' 目标，但在使用 '.kill()' (PYGAME) 后它们重新出现

Question

我最近上传了很多问题，我认为人们对我感到厌倦，但我不擅长编程，并且正在尝试为 A-level 类(class)编写游戏代码，所以我需要所有可以得到的帮助来学习语言。不管怎样，我将在下面展示一些相关的代码以供引用。我使用 all_targets 是因为我想使用 threshold 添加延迟，这样它们就不会同时生成。我认为这导致目标被重新添加到 Sprite 组，但我无法解决它。我希望目标在被子弹击中时从 target_sprites 中移除。我尝试使用 bool 值来实现 if destroyed == True:all_bullets.remove(item) 但它似乎不起作用。感谢您的帮助。

class Target(pygame.sprite.Sprite):
    def __init__(self, width, height, offset, threshold):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.Surface([width, height])
        self.image = target_img
        self.rect = self.image.get_rect()
        self.rect.center = (self.rect.x + 50, self.rect.y + offset)
        self.threshold = threshold



target_sprites = pygame.sprite.Group()

target_1 = Target(100, 100, 100, 0)
target_2 = Target(100, 100, 300, 150)
target_3 = Target(100, 100, 200, 300)
target_4 = Target(100, 100, 100, 450)
target_5 = Target(100, 100, 400, 600)
target_6 = Target(100, 100, 250, 750)

#Function to add delay between targets spawning.

def target_delay():
  global clock 
  clock += 1
  for item in all_targets:
    if clock >= item.threshold:
      target_sprites.add(item)

#Function to make targets move each time screen refreshes.
def movement():
  for item in target_sprites:
    item.rect.x += 1

  for item in all_bullets_keep:
    if item['y']-30 < (target_1.rect.y) + 100 and item['y']+30 > target_1.rect.y:
      if item['x']+10 > target_1.rect.x and item['x']-30 < (target_1.rect.x) + 100:
        target_1.kill()
    if item['y']-30 < (target_2.rect.y) + 100 and item['y']+30 > target_2.rect.y:
      if item['x']+10 > target_2.rect.x and item['x']-30 < (target_2.rect.x) + 100:
        target_2.kill()
    if item['y']-30 < (target_3.rect.y) + 100 and item['y']+30 > target_3.rect.y:
      if item['x']+10 > target_3.rect.x and item['x']-30 < (target_3.rect.x) + 100:
        target_3.kill()
    if item['y']-30 < (target_4.rect.y) + 100 and item['y']+30 > target_4.rect.y:
      if item['x']+10 > target_4.rect.x and item['x']-30 < (target_4.rect.x) + 100:
        target_4.kill()
    if item['y']-30 < (target_5.rect.y) + 100 and item['y']+30 > target_5.rect.y:
      if item['x']+10 > target_5.rect.x and item['x']-30 < (target_5.rect.x) + 100:
        target_5.kill()
    if item['y']-30 < (target_6.rect.y) + 100 and item['y']+30 > target_6.rect.y:
      if item['x']+10 > target_6.rect.x and item['x']-30 < (target_6.rect.x) + 100:
        target_6.kill()

Answer 1

您不需要阈值属性。删除它:

class Target(pygame.sprite.Sprite):
    def __init__(self, width, height, offset):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.Surface([width, height])
        self.image = target_img
        self.rect = self.image.get_rect()
        self.rect.center = (self.rect.x + 50, self.rect.y + offset)

创建一个空的 Sprite 组:

target_sprites = pygame.sprite.Group()

自 pygame.init() 以来的毫秒数可以通过 pygame.time.get_ticks() 检索.参见 pygame.time模块。在主应用程序循环中使用滴答按间隔生成 Sprite (target_delay 必须在应用程序循环中调用):

offsets = [100, 300, 200, 100, 400, 150]
next_target_time = 0
threshold = 1000 # 1000 milliseconds = 1 second

def target_delay():
    global next_target_time, offsets
    current_time = pygame.time.get_ticks()
    if current_time > next_target_time and len(offsets) > 0:
        target_sprites.add(Target(100, 100, offsets[0]))
        offsets.pop(0)
        next_target_time = current_time + threshold

评估一个目标是否必须在循环中被杀死(kill):

for item in all_bullets_keep:
    for target in target_sprites:
        if item['y']-30 < (target.rect.y) + 100 and item['y']+30 > target.rect.y:
            if item['x']+10 > target.rect.x and item['x']-30 < (target.rect.x) + 100:
                target.kill()