Reduced render distance, added back fog

Chunk.cs

@@ -40,7 +40,7 @@ namespace Voxel
             Y = y;
 
             _blockData = new Dictionary<ushort, BlockData>();
-            _blocks = new Blocks[Size * Size * Height];
+            _blocks = new Blocks[TotalBlocks];
             _chunkMesh = new ChunkMesh(X, Y);
 
             Initialize();
@@ -219,14 +219,16 @@ namespace Voxel
 
         private void AddFace(int x, int y, int z, int face, Textures texture, List<FaceData> faces)
         {
-            faces.Add(new FaceData
-            {
-                Facing = (Orientation)face,
-                Texture = texture,
-                X = (byte)x,
-                Y = (byte)y,
-                Z = (byte)z
-            });
+            byte lightLevel = 15;
+
+            faces.Add(new FaceData(
+                (byte)x,
+                (byte)y,
+                (byte)z,
+                (Orientation)face,
+                texture,
+                lightLevel
+            ));
         }
 
         public ChunkMesh GetChunkMesh()

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;
     }
 }

FaceData.cs

@@ -2,25 +2,42 @@
 
 namespace Voxel
 {
+    [StructLayout(LayoutKind.Sequential, Pack = 1)]
     public struct FaceData
     {
-        public Orientation Facing;
-        public byte X, Y, Z;
-        public Textures Texture;
-        public byte LightLevel;
+        public uint _data;
+
+        // Bit layout:
+        // [31-24]: Y (8 bits) 0-255
+        // [23-20]: Z (4 bits) 0-15
+        // [19-16]: X (4 bits) 0-15
+        // [15-10]: Texture (6 bits) 0-63
+        // [9-7]:   Facing (3 bits) 0-7
+        // [6-3]:   Light (4 bits) 0-15
+        // [2-0]:   unused (3 bits)
+
+        public FaceData(byte x, byte y, byte z, Orientation facing, Textures texture, byte lightLevel)
+        {
+            _data = (uint)(
+                ((y & 0xFF) << 24) |      // 8 bits
+                ((z & 0x0F) << 20) |      // 4 bits
+                ((x & 0x0F) << 16) |      // 4 bits
+                (((byte)texture & 0x3F) << 10) | // 6 bits (0-63)
+                (((byte)facing & 0x07) << 7) |   // 3 bits
+                ((lightLevel & 0x0F) << 3)       // 4 bits
+            );
+        }
+
+        public byte X => (byte)((_data >> 16) & 0x0F);
+        public byte Y => (byte)((_data >> 24) & 0xFF);
+        public byte Z => (byte)((_data >> 20) & 0x0F);
+        public Orientation Facing => (Orientation)((_data >> 7) & 0x07);
+        public Textures Texture => (Textures)((_data >> 10) & 0x3F);
+        public byte LightLevel => (byte)((_data >> 3) & 0x0F);
 
         public byte[] Pack()
         {
-            return new byte[]
-            {
-                X,
-                Y,
-                Z,
-                (byte)Facing,
-                (byte)Texture,
-                LightLevel,
-                0,0 // two bits empty
-            };
+            return BitConverter.GetBytes(_data);
         }
     }
 }

Player.cs

@@ -1,12 +1,6 @@
 using OpenTK.Mathematics;
 using OpenTK.Windowing.Common;
 using OpenTK.Windowing.GraphicsLibraryFramework;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Runtime.CompilerServices;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace Voxel
 {
@@ -48,6 +42,8 @@ namespace Voxel
 
         public new void Tick()
         {
+            _world.UpdateChunkLoading(Position);
+
             previousPosition = Position;
 
             float forwards = 0;
@@ -64,7 +60,6 @@ namespace Voxel
 
             if (Input.GetKey(Keys.Space) && OnGround)
             {
-                Console.WriteLine("Jump");
                 Velocity = new Vector3(Velocity.X, 0.42f, Velocity.Z);
                 OnGround = false;
             }

Program.cs

@@ -12,34 +12,6 @@ internal class Program
         World world = new World();
         Window window = new Window(sizeX, sizeY, title);
 
-        Console.WriteLine("Generating map...");
-
-        int worldSizeX = 8;
-        int worldSizeY = 8;
-
-        float maxI = worldSizeX * worldSizeY;
-        int i = 0;
-        int lastPercentage = 0;
-
-        for (int x = 0; x < worldSizeX; x++)
-        {
-            for (int y = 0; y < worldSizeY; y++)
-            {
-                i++;
-                Chunk chunk = new Chunk(x, y);
-                world.AddChunk(chunk);
-
-                int percentage = (int)((i / maxI) * 100);
-                if (percentage > lastPercentage)
-                {
-                    lastPercentage = percentage;
-                    Console.WriteLine((percentage).ToString() + "%");
-                }
-            }
-        }
-
-        Console.WriteLine("Generated " + maxI.ToString() + " chunks");
-
         Renderer.SetWorld(world);
 
         Vector3 startPos = new Vector3(15, 64, 15);

Renderer.cs

@@ -60,46 +60,30 @@ namespace Voxel
         {
             if (_world == null) return;
 
-            int offset = 0;
+            _chunkBufferSizes.Clear();
+            int faceOffset = 0;
+
             foreach (Chunk chunk in _world.GetAllChunks())
             {
                 ChunkMesh chunkMesh = chunk.GetChunkMesh();
 
-                if (chunkMesh.NeedsUpdate)
-                {
-                    byte[] data = chunkMesh.GetPackedData();
-                    GL.BufferSubData(BufferTarget.ShaderStorageBuffer, (IntPtr)offset * 8, chunkMesh.Size * 8, data);
-                }
+                _chunkBufferSizes[(chunk.X, chunk.Y)] = faceOffset;
 
-                _chunkBufferSizes[(chunk.X, chunk.Y)] = offset;
-                offset += chunkMesh.Size * 8;
+                byte[] data = chunkMesh.GetPackedData();
+
+                GL.BufferSubData(BufferTarget.ShaderStorageBuffer,
+                    (IntPtr)(faceOffset * 4),  // faceOffset * 4 = byte offset
+                    chunkMesh.Size * 4,
+                    data
+                );
+
+                faceOffset += chunkMesh.Size;
             }
         }
 
         private static void RenderUi()
         {
-            GL.Disable(EnableCap.DepthTest);
-            GL.Enable(EnableCap.Blend);
-            GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
-
-            //_uiShader.Use();
-
-            //Matrix4 projection = Matrix4.CreateOrthographicOffCenter(
-            //    0, screenWidth, screenHeight, 0, -1, 1);
-            //_uiShader.SetMatrix4("projection", projection);
-
-            // Bind UI texture atlas
-            //_uiTexture.Bind();
-
-            // Draw all UI sprites (batch by texture for efficiency)
-            //foreach (var sprite in _uiSprites)
-            //{
-            //  sprite.Draw();
-            //}
-
-            // Restore 3D settings
-            GL.Disable(EnableCap.Blend);
-            GL.Enable(EnableCap.DepthTest);
+            
         }
 
         private static void RenderWorld()

Shaders/shader.frag

@@ -10,16 +10,23 @@ uniform vec3 cameraPosition;
 
 void main()
 {
-    float fogEnd = 512;
-    float fogStart = 32;
-
-    float dist = length(cameraPosition - fragPos);
-    float fogFactor = (fogEnd - dist) / (fogEnd - fogStart);
-    fogFactor = clamp(fogFactor, 0, 1);
-
-    vec4 fogColor = vec4(0.8,0.8,0.8,1);
-    vec4 texColor = texture(uTexture, fragUV) * lighting;
-    vec4 color = mix(fogColor, texColor, fogFactor);
-
-    FragColor = vec4(color.rgb, texColor.a);
+    // Use squared distance
+    vec3 delta = cameraPosition - fragPos;
+    float distSq = dot(delta, delta);
+    
+    // Precomputed fog parameters
+    const float fogEndSq = 65536.0; // 128^2
+    const float fogStartSq = 1024.0; // 32^2
+    const float fogRangeInv = 1.0 / (fogEndSq - fogStartSq);
+    
+    float fogFactor = (fogEndSq - distSq) * fogRangeInv;
+    fogFactor = clamp(fogFactor, 0.0, 1.0);
+    
+    // Texture and lighting
+    vec4 texColor = texture(uTexture, fragUV);
+    texColor.rgb *= lighting;
+    
+    // Fog blend
+    const vec3 fogColor = vec3(0.8, 0.8, 0.8);
+    FragColor = vec4(mix(fogColor, texColor.rgb, fogFactor), texColor.a);
 }

Shaders/shader.vert

@@ -1,17 +1,12 @@
 #version 430 core
 
-    struct FaceData {
-        uint x;
-        uint y;
-        uint z;
-        uint facing; // 0=+X,1=-X,2=+Y,3=-Y,4=+Z,5=-Z
-        uint texture;
-        uint lightLevel;
-    };
+struct FaceData {
+    uint pack; // All data in 4 bytes
+};
 
-    layout(std430, binding = 0) buffer FaceBuffer {
-        uint faces[];
-    };
+layout(std430, binding = 0) buffer FaceBuffer {
+    uint faces[];
+};
 
 uniform mat4 view;
 uniform mat4 projection;
@@ -77,25 +72,38 @@ const vec3 offsets[6][6] = vec3[6][6](
 
 const vec2 uvs[6] = vec2[6](vec2(0,0), vec2(1,1), vec2(1,0), vec2(1,1), vec2(0,0), vec2(0,1));
 
+// Function to unpack the 4-byte face data
+// Bit layout from C# (little-endian, but we read as uint):
+// Bits 31-24: Y (8 bits) 0-255
+// Bits 23-20: Z (4 bits) 0-15  
+// Bits 19-16: X (4 bits) 0-15
+// Bits 15-10: Texture (6 bits) 0-63
+// Bits 9-7:   Facing (3 bits) 0-7
+// Bits 6-3:   Light (4 bits) 0-15
+// Bits 2-0:   unused (3 bits)
+void unpackFace(uint pack, out uint x, out uint y, out uint z, 
+                out uint facing, out uint texture, out uint lightLevel)
+{
+    y = (pack >> 24) & 0xFFu;        // Y: bits 24-31 (8 bits)
+    z = (pack >> 20) & 0x0Fu;        // Z: bits 20-23 (4 bits)
+    x = (pack >> 16) & 0x0Fu;        // X: bits 16-19 (4 bits)
+    texture = (pack >> 10) & 0x3Fu;  // Texture: bits 10-15 (6 bits)
+    facing = (pack >> 7) & 0x07u;    // Facing: bits 7-9 (3 bits)
+    lightLevel = (pack >> 3) & 0x0Fu;// Light: bits 3-6 (4 bits)
+}
+
 void main()
 {
     uint faceIndex = gl_VertexID / 6u;
     uint vertIndex = gl_VertexID % 6u;
 
-    uint start = faceIndex * 2u; // 2 byte per face
-     
-    uint u0 = faces[start]; // data in uint 0
-    uint u1 = faces[start + 1]; // data in uint 1
+    uint pack = faces[faceIndex];
 
-    // extract values from bits
-    uint x = u0 & 0xFFu;
-    uint y = (u0 >> 8) & 0xFFu;
-    uint z = (u0 >> 16) & 0xFFu;
-    uint facing = (u0 >> 24) & 0xFFu;
-    uint texture = u1 & 0xFFu;
-    uint lightLevel = (u1 >> 8) & 0xFFu;
+    uint x, y, z, facing, texture, lightLevel;
+    unpackFace(pack, x, y, z, facing, texture, lightLevel);
+
+    vec3 basePos = vec3(x, y, z) + vec3(chunkX, 0, chunkY) * 16.0;
 
-    vec3 basePos = vec3(x + chunkX * 16, y, z + chunkY * 16);
     vec4 worldPos = vec4(basePos + offsets[facing][vertIndex], 1.0);
     float light = float(lightLevel) / 255.0; // use later for caves and stuff
 

Textures.cs

@@ -1,6 +1,6 @@
 namespace Voxel
 {
-    public enum Textures : uint
+    public enum Textures : byte
     {
         GrassTop,
         Stone,

UIElement.cs

@@ -0,0 +1,7 @@
+using OpenTK.Mathematics;
+using System.Drawing;
+
+public class UIElement
+{
+
+}

UISprite.cs

@@ -1,17 +0,0 @@
-using OpenTK.Mathematics;
-using System.Drawing;
-
-public class UISprite
-{
-    public Vector2 Position;  // Screen pixels (not normalized)
-    public Vector2 Size;      // Size in pixels
-    public Rectangle TextureRegion;  // Which part of atlas to use
-    public Color Tint = Color.White;
-    public float Rotation = 0f;
-    public Vector2 Origin = Vector2.Zero;  // Rotation/scale origin
-
-    public void Draw()
-    {
-        // Draw textured quad using TextureRegion coordinates
-    }
-}

Window.cs

@@ -90,7 +90,7 @@ namespace Voxel
             GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)TextureWrapMode.Repeat);
 
             CursorState = CursorState.Grabbed;
-            //VSync = VSyncMode.On;
+            VSync = VSyncMode.On;
 
             Camera.UpdateSize(Width, Height);
         }

World.cs

@@ -8,6 +8,10 @@ namespace Voxel
     {
         private Dictionary<(int, int), Chunk> _chunks;
 
+        private (int x, int z) _lastCenter = (0, 0);
+        private int _loadDistance = 8;
+        bool chunkLoadingInitialized = false;
+
         private static readonly Dictionary<Orientation, (int x, int y)> _neighborOffsets = new()
         {
             { Orientation.West, (1, 0) },
@@ -33,6 +37,7 @@ namespace Voxel
 
             UpdateNeighboringChunks(chunk);
             chunk.UpdateChunkMesh();
+            Renderer.MarkBuffersDirty();
         }
 
         public void RemoveChunk(int chunkX, int chunkZ)
@@ -52,6 +57,65 @@ namespace Voxel
             }
         }
 
+        public new void UpdateChunkLoading(Vector3 playerPosition)
+        {
+            int centerX = (int)Math.Floor(playerPosition.X / Chunk.Size);
+            int centerZ = (int)Math.Floor(playerPosition.Z / Chunk.Size);
+
+            // Quick check - skip if still in same chunk
+            if ((centerX == _lastCenter.x && centerZ == _lastCenter.z) && chunkLoadingInitialized)
+                return;
+
+            _lastCenter = (centerX, centerZ);
+
+            // Calculate bounds
+            int minX = centerX - _loadDistance;
+            int maxX = centerX + _loadDistance;
+            int minZ = centerZ - _loadDistance;
+            int maxZ = centerZ + _loadDistance;
+
+            // Unload chunks outside range
+            UnloadDistantChunks(minX, maxX, minZ, maxZ);
+
+            // Load chunks inside range
+            LoadChunksInRange(minX, maxX, minZ, maxZ);
+
+            chunkLoadingInitialized = true;
+        }
+
+        private void UnloadDistantChunks(int minX, int maxX, int minZ, int maxZ)
+        {
+            var chunksToRemove = new List<(int, int)>();
+
+            foreach (var (chunkX, chunkZ) in _chunks.Keys)
+            {
+                if (chunkX < minX || chunkX > maxX || chunkZ < minZ || chunkZ > maxZ)
+                {
+                    chunksToRemove.Add((chunkX, chunkZ));
+                }
+            }
+
+            foreach (var chunkPos in chunksToRemove)
+            {
+                RemoveChunk(chunkPos.Item1, chunkPos.Item2);
+            }
+        }
+
+        private void LoadChunksInRange(int minX, int maxX, int minZ, int maxZ)
+        {
+            for (int x = minX; x <= maxX; x++)
+            {
+                for (int z = minZ; z <= maxZ; z++)
+                {
+                    if (!_chunks.ContainsKey((x, z)))
+                    {
+                        Chunk chunk = new Chunk(x, z);
+                        AddChunk(chunk);
+                    }
+                }
+            }
+        }
+
         public void UpdateNeighboringChunks(Chunk chunk)
         {
             chunk.Neighbors[Orientation.West] = null;
@@ -87,39 +151,21 @@ namespace Voxel
 
         public Blocks GetBlock(int worldX, int worldY, int worldZ)
         {
-            int chunkX = worldX / Chunk.Size;
-            int chunkZ = worldZ / Chunk.Size;
+            var (chunkX, chunkZ, localX, localZ) = WorldToChunkCoords(worldX, worldZ);
+
             Chunk chunk = GetChunk(chunkX, chunkZ);
             if (chunk == null) return 0; // air if chunk not loaded
 
-            int localX = worldX % Chunk.Size;
-            int localZ = worldZ % Chunk.Size;
-
             return chunk.GetBlock(localX, worldY, localZ);
         }
 
-        List<Orientation> GetEdgeOrientations(int localX, int localZ, int size)
-        {
-            var orientations = new List<Orientation>();
-
-            if (localX == size - 1) orientations.Add(Orientation.West);
-            if (localX == 0) orientations.Add(Orientation.East);
-            if (localZ == size - 1) orientations.Add(Orientation.North);
-            if (localZ == 0) orientations.Add(Orientation.South);
-
-            return orientations;
-        }
-
         public void SetBlock(int worldX, int worldY, int worldZ, Blocks block)
         {
-            int chunkX = worldX / Chunk.Size;
-            int chunkZ = worldZ / Chunk.Size;
+            var (chunkX, chunkZ, localX, localZ) = WorldToChunkCoords(worldX, worldZ);
+
             Chunk chunk = GetChunk(chunkX, chunkZ);
             if (chunk == null) return;
 
-            int localX = worldX % Chunk.Size;
-            int localZ = worldZ % Chunk.Size;
-
             chunk.SetBlock(localX, worldY, localZ, block);
 
             if (block == Blocks.Air && ((localX == Chunk.Size - 1 || localX == 0) || (localZ == Chunk.Size - 1 || localZ == 0)))
@@ -134,6 +180,30 @@ namespace Voxel
             }
         }
 
+        public static (int chunkX, int chunkZ, int localX, int localZ) WorldToChunkCoords(int worldX, int worldZ)
+        {
+            int chunkX = worldX >= 0 ? worldX / Chunk.Size : (worldX + 1) / Chunk.Size - 1;
+            int chunkZ = worldZ >= 0 ? worldZ / Chunk.Size : (worldZ + 1) / Chunk.Size - 1;
+
+            int localX = ((worldX % Chunk.Size) + Chunk.Size) % Chunk.Size;
+            int localZ = ((worldZ % Chunk.Size) + Chunk.Size) % Chunk.Size;
+
+            return (chunkX, chunkZ, localX, localZ);
+        }
+
+
+        List<Orientation> GetEdgeOrientations(int localX, int localZ, int size)
+        {
+            var orientations = new List<Orientation>();
+
+            if (localX == size - 1) orientations.Add(Orientation.West);
+            if (localX == 0) orientations.Add(Orientation.East);
+            if (localZ == size - 1) orientations.Add(Orientation.North);
+            if (localZ == 0) orientations.Add(Orientation.South);
+
+            return orientations;
+        }
+
         public IEnumerable<(Orientation orientation, Chunk neighbor)> GetChunkNeighbors(Chunk chunk)
         {
             int chunkX = chunk.X;