namespace BlockSpace.Voxels
{
	public static class PackedVoxel
	{
		public const byte Air = 0;

		public static byte Create(byte colorIndex, VoxelMaterial material)
		{
			colorIndex &= 0x3F;
			if (material == VoxelMaterial.Invisible && colorIndex == 63)
			{
				colorIndex = 62;
			}
			return (byte)((byte)(((uint)material << 6) | colorIndex) + 1);
		}

		public static bool IsAir(byte voxel)
		{
			return voxel == 0;
		}

		public static byte GetColorIndex(byte voxel)
		{
			if (voxel != 0)
			{
				return (byte)((voxel - 1) & 0x3F);
			}
			return 0;
		}

		public static VoxelMaterial GetMaterial(byte voxel)
		{
			if (voxel != 0)
			{
				return (VoxelMaterial)((voxel - 1 >> 6) & 3);
			}
			return VoxelMaterial.Lit;
		}
	}
}