using OpenTK.Graphics.OpenGL4;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Voxel
{
    public class ChunkMesh
    {
        public int X;
        public int Y;
        private byte[] _packedData;
        public bool NeedsUpdate = false;
        public int Size = 0;
        private List<FaceData> _faces;

        public ChunkMesh(int x, int y)
        {
            _packedData = new byte[0];
            X = x;
            Y = y;
        }

        public void SetFaces(List<FaceData> faces)
        {
            Size = faces.Count;
            _faces = faces;
            NeedsUpdate = true;
        }

        public byte[] GetPackedData()
        {
            if (NeedsUpdate)
            {
                _packedData = _faces.SelectMany(f => f.Pack()).ToArray();
            }

            return _packedData;
        }
    }
}