brickcraft/Assets/Scripts/World/NibbleArray.cs

#region C#raft License
// This file is part of C#raft. Copyright C#raft Team 
// 
// C#raft is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
// 
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#endregion

namespace Chraft.Utilities.Misc
{
	public class NibbleArray
	{
		public byte[] Data;

		public NibbleArray (int i)
		{
			Data = new byte[i];
		}

		public NibbleArray (byte[] data)
		{
			Data = data;
		}

		public int getNibble (int blockX, int blockY, int blockZ)
		{

			return getNibble (blockY << 8 | blockZ << 4 | blockX);
		}

		public int getNibble (int packed)
		{
			int i1 = packed >> 1;
			int j1 = packed & 1;
			if (j1 == 0) {
				return Data [i1] & 0xf;
			} else {
				return Data [i1] >> 4 & 0xf;
			}
		}

		public void setNibble (int blockX, int blockY, int blockZ, byte value)
		{
			setNibble (blockY << 8 | blockZ << 4 | blockX, value);
		}

		public void setNibble (int packed, byte value)
		{
			int j1 = packed >> 1;
			int k1 = packed & 1;
			if (k1 == 0) {
				Data [j1] = (byte)(Data [j1] & 0xf0 | value & 0xf);
			} else {
				Data [j1] = (byte)(Data [j1] & 0xf | (value & 0xf) << 4);
			}
		}

		public bool isValid ()
		{
			return Data != null;
		}

        
	}
}