function bullet_vs_wall($sender, $other) {
               
           /* создаем взрыв */
           $explode = @explode->create($sender->x,$sender->y);
                  
           if ( !isset $other->state ) $other->state = 4;
                  
          // увеличиваем урон стены и меняем кадр
           $other->state -= 1;
           $other->animStep += 1;
           if ($other->state < 1)
               $other->free();
                      
          // уничтожаем пулю
           $sender->free();
}

Game::event(OnInit, func($param) {
         // функция инициализации
           @bullet = obj('bullet');
           @wall   = obj('wall');
           @player = obj('player');
           @explode = obj('explode');
                
           @bullet->addEvent(OnCollision, &bullet_vs_wall, @wall);
           //@bullet->addEvent(OnCollision, &bullet_vs_wall, @bullet);
                
           @wall->addEvent(OnCreate, func($self){
               $self->x = rand(0,800);
               $self->y = rand(0,600);
               $self->reg();
           });
                  
           // регистрируем взрыв
           @explode->addEvent(OnCreate, func($self){
               $self->reg()
           });
                  
          // конец анимации - уничтожаем объект взрыва
           @explode->addEvent(OnAnimationEnd, func($self){
               $self->free();
           });
});