optimized faces

ChunkMesh.cs

@@ -1,25 +1,15 @@
-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
+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];
+            _packedData = Array.Empty<byte>();
             X = x;
             Y = y;
         }
@@ -27,18 +17,31 @@ namespace Voxel
         public void SetFaces(List<FaceData> faces)
         {
             Size = faces.Count;
-            _faces = faces;
-            NeedsUpdate = true;
+            _packedData = PackFaces(faces);
         }
 
-        public byte[] GetPackedData()
+        private static byte[] PackFaces(List<FaceData> faces)
         {
-            if (NeedsUpdate)
+            const int BYTES_PER_FACE = 4;
+            int totalFaces = faces.Count;
+            var result = new byte[faces.Count * BYTES_PER_FACE];
+
+            for (int i = 0; i < totalFaces; i++)
             {
-                _packedData = _faces.SelectMany(f => f.Pack()).ToArray();
+                var face = faces[i];
+                uint packed = face._data;
+                int offset = i * 4;
+
+                // Write little-endian (important!)
+                result[offset] = (byte)(packed);
+                result[offset + 1] = (byte)(packed >> 8);
+                result[offset + 2] = (byte)(packed >> 16);
+                result[offset + 3] = (byte)(packed >> 24);
             }
 
-            return _packedData;
+            return result;
         }
+
+        public byte[] GetPackedData() => _packedData;
     }
 }