public void destroy(Location baseLoc, Direction front, PlaceSide side)
        {
            HalfDividedVoxel v = World.world[baseLoc] as HalfDividedVoxel;

            if (v != null)
            {
                v.owner.remove(side);
            }
        }
        public Structure create(Location baseLoc, Direction front, PlaceSide side)
        {
            ContributionReference reffer = new ContributionReference(this, currentColor, currentHighlight, front, side);
            HalfDividedVoxel      v      = World.world[baseLoc] as HalfDividedVoxel;

            if (v == null)
            {
                return(new HVStructure(reffer, baseLoc));
            }
            else
            {
                if (!v.owner.add(reffer))
                {
                    MainWindow.showError("Not enough space or no fit");
                }
                //! MainWindow.showError("設置スペースが無いか、一致しません");
                return(v.owner);
            }
        }
        public static bool canBeBuilt(Location baseLoc)
        {
            Voxel v = World.world[baseLoc];

            if (v != null)
            {
                HalfDividedVoxel hv = v as HalfDividedVoxel;
                if (hv != null)
                {
                    return(hv.hasSpace);
                }
                else
                {
                    return(false);
                }
            }
            else
            {
                return(true);
            }
        }