//el stat point para los enemigos
    public static function getEnemyLevelStatPoint($level, $id_enemy_difficulty, $b_is_boss){
        switch ($id_enemy_difficulty){
            case 1:
                $level = $level-1;
                break;
            case 2:
                break;
            case 3:
                $level = $level+1;
                break;
        }

        if($b_is_boss){
            $level = $level+3;
        }

        return 6.34*pow(10, -5)*pow($level, 2)+4.91*pow(10, -3)*$level+0.412;
    }

    //para obtener los stats del los enemigos
    public static function getEnemyChildStrength($factor_stat ,$level, $id_enemy_difficulty, $b_is_boss){
        $fniv = Utils::getEnemyLevelStatPoint($level, $id_enemy_difficulty, $b_is_boss);
        $base = 60;
        $start = 80;
        $exp = 1.061096214;
        $start_extra = 40;
        $exp_extra = 1.056767382;

        if($level<=20){
            return $fniv*$factor_stat*($start*pow($exp, $level))+$base;
        }else if($level <=58){
            return $fniv*$factor_stat*($start*pow($exp, $level)+($start_extra * pow($exp_extra, $level))/3)+$base;
        }else{
            return $fniv*$factor_stat*($start*pow($exp, $level)+($start_extra * pow($exp_extra, $level))/1.5)+$base;
        }
    }

    //para obtener los stats del los enemigos
    public static function getEnemyChildVitality($factor_stat ,$level, $id_enemy_difficulty, $b_is_boss){
        $fniv = Utils::getEnemyLevelStatPoint($level, $id_enemy_difficulty, $b_is_boss);
        $base = 60;
        $start = 650;
        $exp = 1.053568261;
        $start_extra = 650;
        $exp_extra = 1.053119962;

        if($level<=20){
            return $fniv*$factor_stat*($start*pow($exp, $level))+$base;
        }else if($level <=58){
            return $fniv*$factor_stat*($start*pow($exp, $level)+($start_extra * pow($exp_extra, $level))/3)+$base;
        }else{
            return $fniv*$factor_stat*($start*pow($exp, $level)+($start_extra * pow($exp_extra, $level))/1.5)+$base;
        }
    }

    //para obtener los stats del los enemigos
    public static function getEnemyChildDefense($factor_stat ,$level, $id_enemy_difficulty, $b_is_boss){
        $fniv = Utils::getEnemyLevelStatPoint($level, $id_enemy_difficulty, $b_is_boss);
        $base = 60;
        $start = 80;
        $exp = 1.059337879;
        $start_extra = 80;
        $exp_extra = 1.061060904;

        if($level<=20){
            return $fniv*$factor_stat*($start*pow($exp, $level))+$base;
        }else if($level <=58){
            return $fniv*$factor_stat*($start*pow($exp, $level)+($start_extra * pow($exp_extra, $level))/3)+$base;
        }else{
            return $fniv*$factor_stat*($start*pow($exp, $level)+($start_extra * pow($exp_extra, $level))/1.5)+$base;
        }
    }