Major refactor and organization, optimizations to chunk, world and renderer

Graphics/ChunkMesh.cs

@@ -0,0 +1,47 @@
+namespace Voxel.Graphics
+{
+    public class ChunkMesh
+    {
+        public int X;
+        public int Y;
+        private byte[] _packedData;
+        public int Size = 0;
+
+        public ChunkMesh(int x, int y)
+        {
+            _packedData = Array.Empty<byte>();
+            X = x;
+            Y = y;
+        }
+
+        public void SetFaces(List<FaceData> faces)
+        {
+            Size = faces.Count;
+            _packedData = PackFaces(faces);
+        }
+
+        private static byte[] PackFaces(List<FaceData> faces)
+        {
+            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++)
+            {
+                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 result;
+        }
+
+        public byte[] GetPackedData() => _packedData;
+    }
+}