def update(self, d_time, players: pygame.sprite.Group, missile_wrapper: MissileWrapper):
for e in self.sprites():
if e.life > 0:
missile_wrapper.enemy_hit(e)
for e in self.sprites():
if e.life > 0:
missile_wrapper.enemy_aoe_hit(e)
missile_wrapper.add_from_enemy(e.shoot())
if e.state is Enemy.State.DEAD:
self.remove(e)
if len(players.sprites()) > 1:
for e in self.sprites():
dps = [Vector(p.rect.center[0] - e.rect.center[0], p.rect.center[1] - e.rect.center[1]).magnitude()
for p in players.sprites()]
min_dp = min(dps)
for i in range(len(dps)):
if min_dp == dps[i]:
e.update(d_time, players.sprites()[i].rect.center)
elif len(players.sprites()) == 1:
super().update(d_time, players.sprites()[0].rect.center)
if len(self.sprites()) < self.max_enemies:
self.timer += d_time
if self.timer > self.new_enemy_spawn_interval:
self.add([self.enemy_prefab((random.randrange(0, self.screen.get_width(), 1), -30))
for i in range(self.new_enemies_number)])
self.timer = 0
def collision_pairs(grpSprites1: pygame.sprite.Group,
grpSprites2: pygame.sprite.Group,
fncCollided=pygame.sprite.collide_rect) -> List[Tuple[Sprite, Sprite]]:
lstPairs = []
lstSpr1 = grpSprites1.sprites()
lstSpr2 = grpSprites2.sprites()
for i in range(len(lstSpr1)):
for j in range(len(lstSpr2)):
if fncCollided(lstSpr1[i], lstSpr2[j]):
lstPairs.append((lstSpr1[i], lstSpr2[j]))
return lstPairs
def check_fleet_edges(ai_settings: Settings,
aliens: pygame.sprite.Group) -> NoReturn:
"""有外星人到达边缘是采取相应的措施"""
for alien in aliens.sprites():
if alien.check_edges():
change_fleet_direction(ai_settings, aliens)
break
def collision_pairs_self(grpSprites: pygame.sprite.Group,
fncCollided=pygame.sprite.collide_rect) -> List[Tuple[Sprite, Sprite]]:
lstPairs = []
lstSpr = grpSprites.sprites()
for i in range(len(lstSpr)):
for j in range(i + 1, len(lstSpr)):
if fncCollided(lstSpr[i], lstSpr[j]):
lstPairs.append((lstSpr[i], lstSpr[j]))
return lstPairs
def check_aliens_bottom(ai_settings: Settings, stats: GameStats,
screen: pygame.Surface, ship: Ship,
aliens: pygame.sprite.Group,
bullets: pygame.sprite.Group,
sb: ScoreBoard) -> NoReturn:
"""检查是否有外星人到达了屏幕底端"""
screen_rect = screen.get_rect()
for alien in aliens.sprites():
if alien.rect.bottom >= screen_rect.bottom:
# 像飞船被撞到一样进行处理
ship_hit(ai_settings, stats, screen, sb, ship, aliens, bullets)
def move_player_with_ai(pawnsSprintTable: pygame.sprite.Group,
chessTilesSprintTable: pygame.sprite.Group, action):
pawnX = chessTilesSprintTable.sprites()[
action[0]].get_tile_center_x_for_drawing_pawn(
pawnsSprintTable.sprites()[0])
pawnY = chessTilesSprintTable.sprites()[
action[0]].get_tile_center_y_for_drawing_pawn(
pawnsSprintTable.sprites()[0])
pawn_X_to_move = chessTilesSprintTable.sprites()[
action[1]].get_tile_center_x_for_drawing_pawn(
pawnsSprintTable.sprites()[0])
pawn_Y_to_move = chessTilesSprintTable.sprites()[
action[1]].get_tile_center_y_for_drawing_pawn(
pawnsSprintTable.sprites()[0])
pawn_to_move = [
pawn for pawn in pawnsSprintTable
if (pawn.rect.x == pawnX) and (pawn.rect.y == pawnY)
]
if len(pawn_to_move) != 0:
pawn_to_move[0].set_pawn_position(pawn_X_to_move, pawn_Y_to_move)
def update_screen(ai_settings: Settings, screen: pygame.Surface,
stats: GameStats, sb: ScoreBoard, ship: Ship,
aliens: pygame.sprite.Group, bullets: pygame.sprite.Group,
play_button: Button) -> NoReturn:
"""更新屏幕上的图像，并切换到新屏幕"""
# 每次循环时都重绘屏幕
screen.fill(ai_settings.bg_color)
# 在飞船和外星人后面重绘所有子弹
for bullet in bullets.sprites():
bullet.draw_bullet()
ship.blitme()
aliens.draw(screen)
# 显示得分
sb.show_score()
# 如果游戏处于非活动状态，就绘制Play按钮
if not stats.game_active:
play_button.draw_button()
# 让最近绘制的屏幕可见
pygame.display.flip()
def change_fleet_direction(ai_settings: Settings,
aliens: pygame.sprite.Group) -> NoReturn:
"""将整群外星人下移， 并改变他们的方向"""
for alien in aliens.sprites():
alien.rect.y += ai_settings.fleet_drop_speed
ai_settings.fleet_direction *= -1
def collisions_of_enemies(enemies: pygame.sprite.Group):
for i in range(len(enemies.sprites())):
for j in range(i + 1, len(enemies.sprites())):
if is_collision(enemies.sprites()[i], enemies.sprites()[j]):
yield enemies.sprites()[i], enemies.sprites()[j]
