class Bullet:
def __init__(self, screen, site, nature):
self.site = site
self.screen = screen
self.nature = nature
self.imagemanager = ImageManager()
def move(self):
if self.nature == 'plane':
self.site[1] = self.site[1] - 0.5 #元组不支持修改删除
elif self.nature == 'enemy':
self.site[1] += 0.5
def show(self):
if self.nature == 'plane':
self.screen.blit(self.imagemanager.get_plane_bullet(),
(USIZE * self.site[0], USIZE * self.site[1]))
elif self.nature == 'enemy':
self.screen.blit(self.imagemanager.get_enemy_bullet(),
(USIZE * self.site[0], USIZE * self.site[1]))
