public bool SideCaseIsNotWall(DIRECTION dir, AnimateObject obj)
 {
     switch(dir)
     {
         case DIRECTION.DOWN:
             if (obj.GetCaseYSup(map.Tile_size) != -1)
             {
                 if (map.Grid[obj.GetCaseYSup(map.Tile_size)][obj.GetAcutalCaseX(map.Tile_size)].Content == CELL_CONTENT.WALL)
                 {
                     return false;
                 }
             }
             break;
         case DIRECTION.UP:
             if (obj.GetCaseYInf(map.Tile_size) != -1)
             {
                 if (map.Grid[obj.GetCaseYInf(map.Tile_size) - 1][obj.GetAcutalCaseX(map.Tile_size)].Content == CELL_CONTENT.WALL)
                 {
                     return false;
                 }
             }
             break;
         case DIRECTION.LEFT:
             if (obj.GetCaseXInf(map.Tile_size) != -1)
             {
                 if (map.Grid[obj.GetAcutalCaseY(map.Tile_size)][obj.GetCaseXInf(map.Tile_size) - 1].Content == CELL_CONTENT.WALL)
                 {
                     return false;
                 }
             }
             break;
         case DIRECTION.RIGHT:
             if (obj.GetCaseXSup(map.Tile_size) != -1)
             {
                 if (map.Grid[obj.GetAcutalCaseY(map.Tile_size)][obj.GetCaseXSup(map.Tile_size)].Content == CELL_CONTENT.WALL)
                 {
                     return false;
                 }
             }
             break; 
     }
     return true;
 }
        public List<DIRECTION> GetPossibleDirection(AnimateObject obj)
        {
            List<DIRECTION> ret = new List<DIRECTION>();

            if (this.SideCaseIsNotWall(DIRECTION.DOWN, obj))
            {
                ret.Add(DIRECTION.DOWN);
            }
            if (this.SideCaseIsNotWall(DIRECTION.UP, obj))
            {
                ret.Add(DIRECTION.UP);
            }
            if (this.SideCaseIsNotWall(DIRECTION.RIGHT, obj))
            {
                ret.Add(DIRECTION.RIGHT);
            }
            if (this.SideCaseIsNotWall(DIRECTION.LEFT, obj))
            {
                ret.Add(DIRECTION.LEFT);
            }

            return ret;
        }