public void moveUnit(UnitGroup ug, GridPosition pos)
    {
        LevelUnitPosition toMove;

        foreach (LevelUnitPosition lup in unitPositions)
        {
            if (ug.Equals(lup.unitGroup))
            {
                toMove = lup;
                break;
            }
        }
        toMove.position.x         = pos.x;
        toMove.position.y         = pos.y;
        toMove.position.elevation = pos.elevation;
    }