/// 破棄
 protected override void DoTerm()
 {
     if( objCh != null ){
     objCh.Term();
     }
     objCh    = null;
 }
        /// 初期化
        protected override bool DoInit()
        {
            objCh = new ObjChEnemyWall(TexId ,pos1 ,pos2);
            objCh.Init();
            deadMark = false;

            return true;
        }