using System.Runtime.CompilerServices;

namespace MTAssets.UltimateLODSystem.MeshSimplifier.Internal
{
	internal class UVChannels<TVec>
	{
		private static readonly int UVChannelCount = MeshUtils.UVChannelCount;

		private ResizableArray<TVec>[] channels;

		private TVec[][] channelsData;

		public TVec[][] Data
		{
			[MethodImpl(MethodImplOptions.AggressiveInlining)]
			get
			{
				for (int i = 0; i < UVChannelCount; i++)
				{
					if (channels[i] != null)
					{
						channelsData[i] = channels[i].Data;
					}
					else
					{
						channelsData[i] = null;
					}
				}
				return channelsData;
			}
		}

		public ResizableArray<TVec> this[int index]
		{
			[MethodImpl(MethodImplOptions.AggressiveInlining)]
			get
			{
				return channels[index];
			}
			[MethodImpl(MethodImplOptions.AggressiveInlining)]
			set
			{
				channels[index] = value;
			}
		}

		public UVChannels()
		{
			channels = new ResizableArray<TVec>[UVChannelCount];
			channelsData = new TVec[UVChannelCount][];
		}

		public void Resize(int capacity, bool trimExess = false)
		{
			for (int i = 0; i < UVChannelCount; i++)
			{
				if (channels[i] != null)
				{
					channels[i].Resize(capacity, trimExess);
				}
			}
		}
	}
}