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	public static final boolean checkWalkStep(int plane, int x, int y, int dir, int size) {
		return checkWalkStep(plane, x, y, Utils.DIRECTION_DELTA_X[dir], Utils.DIRECTION_DELTA_Y[dir], size);
	}

	public static final boolean checkWalkStep(int plane, int x, int y, int xOffset, int yOffset, int size) {
		if (size == 1) {
			int mask = getMask(plane, x + xOffset, y + yOffset);
			if (xOffset == -1 && yOffset == 0)
				return (mask
						& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_EAST)) == 0;
			if (xOffset == 1 && yOffset == 0)
				return (mask
						& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_WEST)) == 0;
			if (xOffset == 0 && yOffset == -1)
				return (mask
						& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_NORTH)) == 0;
			if (xOffset == 0 && yOffset == 1)
				return (mask
						& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_SOUTH)) == 0;
			if (xOffset == -1 && yOffset == -1)
				return (mask & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_NORTH
						| Flags.WALLOBJ_EAST | Flags.CORNEROBJ_NORTHEAST)) == 0
						&& (getMask(plane, x - 1, y) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
								| Flags.WALLOBJ_EAST)) == 0
						&& (getMask(plane, x, y - 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
								| Flags.WALLOBJ_NORTH)) == 0;
			if (xOffset == 1 && yOffset == -1)
				return (mask & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_NORTH
						| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_NORTHWEST)) == 0
						&& (getMask(plane, x + 1, y) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
								| Flags.WALLOBJ_WEST)) == 0
						&& (getMask(plane, x, y - 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
								| Flags.WALLOBJ_NORTH)) == 0;
			if (xOffset == -1 && yOffset == 1)
				return (mask & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_EAST
						| Flags.WALLOBJ_SOUTH | Flags.CORNEROBJ_SOUTHEAST)) == 0
						&& (getMask(plane, x - 1, y) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
								| Flags.WALLOBJ_EAST)) == 0
						&& (getMask(plane, x, y + 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
								| Flags.WALLOBJ_SOUTH)) == 0;
			if (xOffset == 1 && yOffset == 1)
				return (mask & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_SOUTH
						| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_SOUTHWEST)) == 0
						&& (getMask(plane, x + 1, y) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
								| Flags.WALLOBJ_WEST)) == 0
						&& (getMask(plane, x, y + 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
								| Flags.WALLOBJ_SOUTH)) == 0;
		} else if (size == 2) {
			if (xOffset == -1 && yOffset == 0)
				return (getMask(plane, x - 1, y) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST | Flags.CORNEROBJ_NORTHEAST)) == 0
						&& (getMask(plane, x - 1, y + 1)
								& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_EAST
										| Flags.WALLOBJ_SOUTH | Flags.CORNEROBJ_SOUTHEAST)) == 0;
			if (xOffset == 1 && yOffset == 0)
				return (getMask(plane, x + 2, y) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_WEST | Flags.CORNEROBJ_NORTHWEST)) == 0
						&& (getMask(plane, x + 2, y + 1)
								& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_SOUTH
										| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_SOUTHWEST)) == 0;
			if (xOffset == 0 && yOffset == -1)
				return (getMask(plane, x, y - 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST | Flags.CORNEROBJ_NORTHEAST)) == 0
						&& (getMask(plane, x + 1, y - 1)
								& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_NORTH
										| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_NORTHWEST)) == 0;
			if (xOffset == 0 && yOffset == 1)
				return (getMask(plane, x, y + 2) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_EAST | Flags.WALLOBJ_SOUTH | Flags.CORNEROBJ_SOUTHEAST)) == 0
						&& (getMask(plane, x + 1, y + 2)
								& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_SOUTH
										| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_SOUTHWEST)) == 0;
			if (xOffset == -1 && yOffset == -1)
				return (getMask(plane, x - 1, y) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST | Flags.WALLOBJ_SOUTH | Flags.CORNEROBJ_NORTHEAST
						| Flags.CORNEROBJ_SOUTHEAST)) == 0
						&& (getMask(plane, x - 1, y - 1)
								& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_NORTH
										| Flags.WALLOBJ_EAST | Flags.CORNEROBJ_NORTHEAST)) == 0
						&& (getMask(plane, x, y - 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
								| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST | Flags.WALLOBJ_WEST
								| Flags.CORNEROBJ_NORTHWEST | Flags.CORNEROBJ_NORTHEAST)) == 0;
			if (xOffset == 1 && yOffset == -1)
				return (getMask(plane, x + 1, y - 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST | Flags.WALLOBJ_WEST | Flags.CORNEROBJ_NORTHWEST
						| Flags.CORNEROBJ_NORTHEAST)) == 0
						&& (getMask(plane, x + 2, y - 1)
								& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_NORTH
										| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_NORTHWEST)) == 0
						&& (getMask(plane, x + 2, y) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
								| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_SOUTH | Flags.WALLOBJ_WEST
								| Flags.CORNEROBJ_NORTHWEST | Flags.CORNEROBJ_SOUTHWEST)) == 0;
			if (xOffset == -1 && yOffset == 1)
				return (getMask(plane, x - 1, y + 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST | Flags.WALLOBJ_SOUTH | Flags.CORNEROBJ_NORTHEAST
						| Flags.CORNEROBJ_SOUTHEAST)) == 0
						&& (getMask(plane, x - 1, y + 1)
								& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_EAST
										| Flags.WALLOBJ_SOUTH | Flags.CORNEROBJ_SOUTHEAST)) == 0
						&& (getMask(plane, x, y + 2) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
								| Flags.WALLOBJ_EAST | Flags.WALLOBJ_SOUTH | Flags.WALLOBJ_WEST
								| Flags.CORNEROBJ_SOUTHEAST | Flags.CORNEROBJ_SOUTHWEST)) == 0;
			if (xOffset == 1 && yOffset == 1)
				return (getMask(plane, x + 1, y + 2) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_EAST | Flags.WALLOBJ_SOUTH | Flags.WALLOBJ_WEST | Flags.CORNEROBJ_SOUTHEAST
						| Flags.CORNEROBJ_SOUTHWEST)) == 0
						&& (getMask(plane, x + 2, y + 2)
								& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_SOUTH
										| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_SOUTHWEST)) == 0
						&& (getMask(plane, x + 1, y + 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK
								| Flags.OBJ | Flags.WALLOBJ_NORTH | Flags.WALLOBJ_SOUTH | Flags.WALLOBJ_WEST
								| Flags.CORNEROBJ_NORTHWEST | Flags.CORNEROBJ_SOUTHWEST)) == 0;
		} else {
			if (xOffset == -1 && yOffset == 0) {
				if ((getMask(plane, x - 1, y) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST | Flags.CORNEROBJ_NORTHEAST)) != 0
						|| (getMask(plane, x - 1, -1 + (y + size))
								& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_EAST
										| Flags.WALLOBJ_SOUTH | Flags.CORNEROBJ_SOUTHEAST)) != 0)
					return false;
				for (int sizeOffset = 1; sizeOffset < size - 1; sizeOffset++)
					if ((getMask(plane, x - 1, y + sizeOffset) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK
							| Flags.OBJ | Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST | Flags.WALLOBJ_SOUTH
							| Flags.CORNEROBJ_NORTHEAST | Flags.CORNEROBJ_SOUTHEAST)) != 0)
						return false;
			} else if (xOffset == 1 && yOffset == 0) {
				if ((getMask(plane, x + size, y) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_WEST | Flags.CORNEROBJ_NORTHWEST)) != 0
						|| (getMask(plane, x + size, y - (-size + 1))
								& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_SOUTH
										| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_SOUTHWEST)) != 0)
					return false;
				for (int sizeOffset = 1; sizeOffset < size - 1; sizeOffset++)
					if ((getMask(plane, x + size, y + sizeOffset) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK
							| Flags.OBJ | Flags.WALLOBJ_NORTH | Flags.WALLOBJ_SOUTH | Flags.WALLOBJ_WEST
							| Flags.CORNEROBJ_NORTHWEST | Flags.CORNEROBJ_SOUTHWEST)) != 0)
						return false;
			} else if (xOffset == 0 && yOffset == -1) {
				if ((getMask(plane, x, y - 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST | Flags.CORNEROBJ_NORTHEAST)) != 0
						|| (getMask(plane, x + size - 1, y - 1)
								& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_NORTH
										| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_NORTHWEST)) != 0)
					return false;
				for (int sizeOffset = 1; sizeOffset < size - 1; sizeOffset++)
					if ((getMask(plane, x + sizeOffset, y - 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK
							| Flags.OBJ | Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST | Flags.WALLOBJ_WEST
							| Flags.CORNEROBJ_NORTHWEST | Flags.CORNEROBJ_NORTHEAST)) != 0)
						return false;
			} else if (xOffset == 0 && yOffset == 1) {
				if ((getMask(plane, x, y + size) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_EAST | Flags.WALLOBJ_SOUTH | Flags.CORNEROBJ_SOUTHEAST)) != 0
						|| (getMask(plane, x + (size - 1), y + size)
								& (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_SOUTH
										| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_SOUTHWEST)) != 0)
					return false;
				for (int sizeOffset = 1; sizeOffset < size - 1; sizeOffset++)
					if ((getMask(plane, x + sizeOffset, y + size) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK
							| Flags.OBJ | Flags.WALLOBJ_EAST | Flags.WALLOBJ_SOUTH | Flags.WALLOBJ_WEST
							| Flags.CORNEROBJ_SOUTHEAST | Flags.CORNEROBJ_SOUTHWEST)) != 0)
						return false;
			} else if (xOffset == -1 && yOffset == -1) {
				if ((getMask(plane, x - 1, y - 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST | Flags.CORNEROBJ_NORTHEAST)) != 0)
					return false;
				for (int sizeOffset = 1; sizeOffset < size; sizeOffset++)
					if ((getMask(plane, x - 1, y + (-1 + sizeOffset)) & (Flags.FLOOR_BLOCKSWALK
							| Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST
							| Flags.WALLOBJ_SOUTH | Flags.CORNEROBJ_NORTHEAST | Flags.CORNEROBJ_SOUTHEAST)) != 0
							|| (getMask(plane, sizeOffset - 1 + x, y - 1) & (Flags.FLOOR_BLOCKSWALK
									| Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST
									| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_NORTHWEST | Flags.CORNEROBJ_NORTHEAST)) != 0)
						return false;
			} else if (xOffset == 1 && yOffset == -1) {
				if ((getMask(plane, x + size, y - 1) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_NORTH | Flags.WALLOBJ_WEST | Flags.CORNEROBJ_NORTHWEST)) != 0)
					return false;
				for (int sizeOffset = 1; sizeOffset < size; sizeOffset++)
					if ((getMask(plane, x + size, sizeOffset + (-1 + y)) & (Flags.FLOOR_BLOCKSWALK
							| Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_NORTH | Flags.WALLOBJ_SOUTH
							| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_NORTHWEST | Flags.CORNEROBJ_SOUTHWEST)) != 0
							|| (getMask(plane, x + sizeOffset, y - 1) & (Flags.FLOOR_BLOCKSWALK
									| Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST
									| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_NORTHWEST | Flags.CORNEROBJ_NORTHEAST)) != 0)
						return false;
			} else if (xOffset == -1 && yOffset == 1) {
				if ((getMask(plane, x - 1, y + size) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ
						| Flags.WALLOBJ_EAST | Flags.WALLOBJ_SOUTH | Flags.CORNEROBJ_SOUTHEAST)) != 0)
					return false;
				for (int sizeOffset = 1; sizeOffset < size; sizeOffset++)
					if ((getMask(plane, x - 1, y + sizeOffset) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK
							| Flags.OBJ | Flags.WALLOBJ_NORTH | Flags.WALLOBJ_EAST | Flags.WALLOBJ_SOUTH
							| Flags.CORNEROBJ_NORTHEAST | Flags.CORNEROBJ_SOUTHEAST)) != 0
							|| (getMask(plane, -1 + (x + sizeOffset), y + size) & (Flags.FLOOR_BLOCKSWALK
									| Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_EAST | Flags.WALLOBJ_SOUTH
									| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_SOUTHEAST | Flags.CORNEROBJ_SOUTHWEST)) != 0)
						return false;
			} else if (xOffset == 1 && yOffset == 1) {
				if ((getMask(plane, x + size, y + size) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK
						| Flags.OBJ | Flags.WALLOBJ_SOUTH | Flags.WALLOBJ_WEST | Flags.CORNEROBJ_SOUTHWEST)) != 0)
					return false;
				for (int sizeOffset = 1; sizeOffset < size; sizeOffset++)
					if ((getMask(plane, x + sizeOffset, y + size) & (Flags.FLOOR_BLOCKSWALK | Flags.FLOORDECO_BLOCKSWALK
							| Flags.OBJ | Flags.WALLOBJ_EAST | Flags.WALLOBJ_SOUTH | Flags.WALLOBJ_WEST
							| Flags.CORNEROBJ_SOUTHEAST | Flags.CORNEROBJ_SOUTHWEST)) != 0
							|| (getMask(plane, x + size, y + sizeOffset) & (Flags.FLOOR_BLOCKSWALK
									| Flags.FLOORDECO_BLOCKSWALK | Flags.OBJ | Flags.WALLOBJ_NORTH | Flags.WALLOBJ_SOUTH
									| Flags.WALLOBJ_WEST | Flags.CORNEROBJ_NORTHWEST | Flags.CORNEROBJ_SOUTHWEST)) != 0)
						return false;
			}
		}
		return true;
	}