class NoticeBar(Sprite):
"""靶机启动提示条"""
def __init__(self, settings, screen, target):
super().__init__()
self.settings = settings
self.screen = screen
self.rect = pygame.Rect(target.rect.left, target.rect.bottom,
target.rect.width, 3)
self.y = float(self.rect.y)
self.color = (0, 0, 0)
self.speed = 3
self.timer = MyTimer()
def update(self):
"""向下移动提示条"""
if self.speed != 0:
if self.y >= self.screen.get_rect(
).bottom - self.settings.y_target_boundary: # 到达底端时停止移动
self.speed = 0
else:
self.y += self.speed
self.rect.y = self.y
def draw_bar(self):
"""绘制提示条"""
pygame.draw.rect(self.screen, self.color, self.rect)
def start_timer(self):
self.timer.begin()
def stop_timer(self):
self.timer.stop()
def reset_timer(self):
self.timer.reset()
class Target(TargetSample, Sprite):
"""靶机类"""
def __init__(self, settings, stats, screen, *args):
"""初始化靶机并设置其起始位置"""
TargetSample.__init__(self)
Sprite.__init__(self)
self.settings = settings
self.screen = screen
self.stats = stats
self.screen_rect = screen.get_rect()
self.args = args
self.target_shield_image = pygame.image.load(
dir_path + r'\images\target_shield.png')
# 靶机初始位置
self.rect.x = self.settings.x_target_position + args[
0] * self.rect.width * 2
self.rect.y = self.settings.y_target_boundary
# 存储靶机准确位置
self.x = float(self.rect.x)
self.y = float(self.rect.y)
self.timer = MyTimer()
self.shield_timer = MyTimer()
self.moving = False
self.delay = self.args[4] # 靶机延时启动时长
if self.args[3]: # 带盾
self.image = self.target_shield_image
self.life = 2
else: # 无盾
self.life = 1
def update_shield(self):
"""更新护盾状态"""
if self.args[3] and self.shield_timer.pass_time > 5: # 带盾靶机每5秒会重新生成护盾
self.shield_timer.reset()
if self.life < 2: # 重新生成护盾，靶机变为蓝色
self.image = self.target_shield_image
self.life = 2
def check_edges(self):
"""如果靶机位于活动范围边缘，就返回True"""
if self.rect.bottom > self.screen_rect.bottom - self.settings.y_target_boundary:
return True
elif self.rect.top < self.settings.y_target_boundary:
return True
return False
def blitme(self):
"""在指定位置绘制靶机"""
self.screen.blit(self.image, self.rect)
def kill(self):
"""重写kill()，响应靶机被击中"""
if self.timer.pass_time > 0.5: # 0.5秒内的碰撞视为击中同一个靶机
if self.life > 1: # 击破护盾，靶机变为灰色
if self.stats.sound_state:
shield_broken_sound.play() # 击破护盾音效
self.life -= 1
self.image = self.target_image
self.timer.reset()
else: # 击破靶机
if self.stats.sound_state:
target_broken_sound.play()
self.timer.stop()
self.shield_timer.stop()
super().kill()
def start_timer(self):
self.timer.begin()
def stop_timer(self):
self.timer.stop()
def reset_timer(self):
self.timer.reset()
def start_shield_timer(self):
self.shield_timer.begin()
def stop_shield_timer(self):
self.shield_timer.stop()
def reset_shield_timer(self):
self.shield_timer.reset()