README.md

@@ -4,22 +4,26 @@
   <img src="./logo-cropped.svg" alt="FastVoxel logo" width="180" />
 </p>
 
-FastVoxel is a voxel terrain engine for Godot written as a Rust GDExtension. The goal is basically: generate chunks quickly, keep voxel storage lightweight, and build meshes at runtime for blocky worlds with textured materials.
+**FastVoxel** is a **Voxel Engine** for Godot written as a Rust GDExtension. The goal is basically: generate chunks quickly, keep voxel storage lightweight, and build meshes at runtime for blocky worlds with textured materials.
 
-This repo contains the engine/plugin side of the project.
+This repo contains the engine/GDExtension side of the project.
 
-It's currently being refactored a bit, so some internal structure may change, but the main ideas and APIs are stable enough to explain here.
+It's currently being refactored constantly, so some internal structure may change, but the main ideas and APIs are stable enough to explain here. (or Are They?)
 
 ## Highlights
 
 - Rust-based Godot 4 GDExtension
-- chunked voxel terrain pipeline
+- chunked voxel mesh pipeline
 - bit-packed voxel storage (solid / air)
 - procedural terrain using `fastnoise-lite`
 - chunk streaming around the player
 - runtime cube meshing with texture atlas support
 - Godot editor resources for config + voxel registry
 
+## Soon:
+
+- Multi-Threaded chunk meshing and world generation using a `Work Stealing` Thread pool with divide‑and‑conquer parallelism.
+
 ## Screenshots
 
 <p align="center">
@@ -63,6 +67,12 @@ Rough pipeline looks like this:
 
 The idea is to keep generation, storage, and meshing fairly modular so different strategies can be swapped in later.
 
+## What FastVoxel "Doesn't" do
+
+1. The engine doesn't use compute shaders or any kind of GPU accelerated meshing algorithem.
+2. The engine doesn't bake per-vertex AO on greedy mesher (because it complicates things and I'm running on two brain cells at the moment)
+3. The engine doesn't cull the neighboring faces because it has no access to the data of adjacent chunks. (I'm working on it).
+
 ## Core Concepts
 
 ### Chunked world layout
@@ -73,7 +83,7 @@ Current defaults:
 
 - `CHUNK_SIZE = 32`
 - each chunk = `32 × 32 × 32` voxels
-- columns stack multiple chunks vertically
+- columns stack multiple chunks vertically like a hamburger
 - chunk loading/unloading happens around the player based on render distance
 
 Relevant files:
@@ -84,14 +94,18 @@ Relevant files:
 
 ### Bit-packed voxel storage
 
-Instead of storing a struct per voxel, chunks store occupancy using packed `u32` blocks.
+Instead of storing a struct per voxel, chunks store occupancy using packed `u32` blocks. since a voxel is represented by a single **bit**, a single `u32` can store the state of `32 voxels`.
 
-So right now a voxel is basically:
+right now a voxel is basically:
 
 - `0` -> air
 - `1` -> solid
 
-This keeps memory usage low and makes lookups very cheap. It works well for early terrain prototypes and simple block worlds.
+This keeps memory usage low and makes lookups very cheap.
+
+For a 32 × 32 × 32 chunk, each horizontal row of 32 voxels fits into a single u32. Which means a layer of the chunk requires 32 u32s, and the entire chunk can be stored as a 32 × 32 array of u32s. Each u32 corresponds to one row of voxels along the X axis.
+
+This compact memory layout works well for terrain meshing stage, where the main concern is to quickly check whether voxels are empty or solid. because we use a single bit to represent a voxel instead of a full struct or enum or whatever, the implementation is 32× more memory efficient (no sh- sherlock).
 
 Material differences are currently handled at the meshing/registry layer instead of inside the voxel storage itself.
 

src/chunk/chunk.rs

@@ -2,11 +2,12 @@ use godot::prelude::*;
 
 pub const CHUNK_SIZE: i32 = 32;
 pub const ARR_SIZE: usize = CHUNK_SIZE.pow(3) as usize;
+
 // 32x32x32 = 32768 bits, stored in u32s (32 bits each) = 1024 u32s
 pub const BITPACKED_SIZE: usize = ARR_SIZE / 32;
 
 #[derive(Debug)]
-pub struct Chunk {
+pub struct SubChunk {
     // Bitpacked voxel data: 0 = air, 1 = solid
     pub voxels: Vec<u32>,
     // WORLD COORDINATES
@@ -14,10 +15,10 @@ pub struct Chunk {
     modified: bool,
 }
 
-impl Chunk {
+impl SubChunk {
     /// pos_z and pos_x are `world` coordinates of the chunk, inside the world
     pub fn new(world_pos_x: f64, world_pos_y: f64, world_pos_z: f64) -> Self {
-        Chunk {
+        SubChunk {
             voxels: vec![0u32; BITPACKED_SIZE],
             world_position: (world_pos_x, world_pos_y, world_pos_z),
             modified: false,
@@ -30,7 +31,7 @@ impl Chunk {
     //         as usize
     // }
     #[inline(always)]
-    fn get_voxel_index(local: Vector3i, chunk_size: Vector3i) -> usize {
+    fn get_voxel_index(local: Vector3i) -> usize {
         ((local.x << 10) | (local.y << 5) | local.z) as usize
     }
 
@@ -52,7 +53,7 @@ impl Chunk {
             local_pos
         );
 
-        let index = Self::get_voxel_index(local_pos, chunk_size);
+        let index = Self::get_voxel_index(local_pos);
         debug_assert!(
             index < BITPACKED_SIZE,
             "Voxel index {:?} out of chunk bounds",
@@ -71,7 +72,7 @@ impl Chunk {
             "Voxel position {:?} out of chunk bounds",
             voxel_pos
         );
-        let index = Self::get_voxel_index(voxel_pos, chunk_size);
+        let index = Self::get_voxel_index(voxel_pos);
 
         let word_index = index >> 5;
         let bit_index = index & 31;

src/chunk/chunk_manager.rs

@@ -3,17 +3,16 @@ use godot::classes::class_macros::private::virtuals::Os::{Vector3, Vector3i};
 use godot::global::godot_print;
 use godot::obj::Gd;
 
-use crate::chunk::{Chunk, ChunkColumn, ChunkMesh};
+use crate::chunk::{Chunk, ChunkMesh, SubChunk};
 use crate::editor::voxel_registry::VoxelRegistry;
-use crate::generation::SimpleSurfaceGenerator;
+use crate::generation::generator::TerrainGenerator;
-use crate::generation::generator::SurfaceGenerator;
 use crate::meshing::Mesher;
 use crate::rendering::Renderer;
 use std::collections::HashMap;
 use std::time::Instant;
 
 pub struct ChunkManager {
-    pub chunk_columns: HashMap<(i32, i32), ChunkColumn>,
+    pub chunk_columns: HashMap<(i32, i32), Chunk>,
     pub renderer: Renderer,
     pub last_player_chunk: (i32, i32),
 
@@ -43,7 +42,7 @@ impl ChunkManager {
         player_world_pos: Vector3,
         render_distance: i32,
         registry: &VoxelRegistry,
-        surface_generator: &dyn SurfaceGenerator,
+        surface_generator: &dyn TerrainGenerator,
         mesher: &dyn Mesher,
     ) -> bool {
         let player_chunk_index_x = (player_world_pos.x as i32).div_euclid(self.chunk_size.x);
@@ -91,7 +90,7 @@ impl ChunkManager {
         center_z: i32,
         distance: i32,
         registry: &VoxelRegistry,
-        generator: &dyn SurfaceGenerator,
+        generator: &dyn TerrainGenerator,
         mesher: &dyn Mesher,
     ) {
         use std::collections::HashSet;
@@ -129,21 +128,21 @@ impl ChunkManager {
         index_x: i32,
         index_z: i32,
         registry: &VoxelRegistry,
-        generator: &dyn SurfaceGenerator,
+        generator: &dyn TerrainGenerator,
         mesher: &dyn Mesher,
     ) {
-        let mut column = ChunkColumn::new(index_x, index_z, self.chunk_size);
+        let mut column = Chunk::new(index_x, index_z, self.chunk_size);
 
         let start = Instant::now();
 
-        generator.generate(&mut column);
+        generator.sample_chunk(&mut column);
 
         let generate_elapsed = start.elapsed().as_micros();
         godot_print!("Generation took: {}μs", generate_elapsed);
 
         // Mesh and render each chunk
         for i in 0..self.terrain_height {
-            if let Some(chunk) = column.get_chunk(i as usize) {
+            if let Some(chunk) = column.get_sub_chunk(i as usize) {
                 self.mesh_and_render_chunk(chunk, mesher, registry);
             }
         }
@@ -154,7 +153,7 @@ impl ChunkManager {
 
     fn mesh_and_render_chunk(
         &mut self,
-        chunk: &Chunk,
+        chunk: &SubChunk,
         mesher: &dyn Mesher,
         registry: &VoxelRegistry,
     ) {

src/chunk/column.rs

@@ -1,26 +1,31 @@
 use godot::classes::class_macros::private::virtuals::Os::Vector3i;
 
-use super::chunk::{CHUNK_SIZE, Chunk};
+use super::chunk::{CHUNK_SIZE, SubChunk};
 
 pub const CHUNKS_PER_COLUMN: usize = 8;
 
-pub struct ChunkColumn {
+pub struct ChunkPos {
-    pub chunks: [Option<Chunk>; CHUNKS_PER_COLUMN],
+    pub x: i64,
+    pub y: i64,
+}
+
+pub struct Chunk {
+    pub sub_chunks: [Option<SubChunk>; CHUNKS_PER_COLUMN],
     pub world_position: (i32, i32), // XZ
     pub chunk_size: Vector3i,
 }
 
-impl ChunkColumn {
+impl Chunk {
     pub fn new(x: i32, z: i32, chunk_size: Vector3i) -> Self {
-        ChunkColumn {
+        Chunk {
-            chunks: [None, None, None, None, None, None, None, None],
+            sub_chunks: [None, None, None, None, None, None, None, None],
             world_position: (x, z),
             chunk_size,
         }
     }
 
     #[inline]
-    pub fn get_chunk_index(chunk_size_y: i32, world_y: i32) -> usize {
+    pub fn get_sub_chunk_index(chunk_size_y: i32, world_y: i32) -> usize {
         (world_y / chunk_size_y) as usize
     }
 
@@ -34,31 +39,31 @@ impl ChunkColumn {
         (chunk_index * chunk_size_y) + local_y
     }
 
-    pub fn get_or_create_chunk(&mut self, chunk_y_index: i32) -> &mut Chunk {
+    pub fn get_or_create_sub_chunk(&mut self, chunk_y_index: i32) -> &mut SubChunk {
-        if self.chunks[chunk_y_index as usize].is_none() {
+        if self.sub_chunks[chunk_y_index as usize].is_none() {
             let (world_x, world_z) = self.world_position;
-            self.chunks[chunk_y_index as usize] = Some(Chunk::new(
+            self.sub_chunks[chunk_y_index as usize] = Some(SubChunk::new(
                 world_x as f64,
                 (chunk_y_index) as f64,
                 world_z as f64,
             ));
         }
-        self.chunks[chunk_y_index as usize].as_mut().unwrap()
+        self.sub_chunks[chunk_y_index as usize].as_mut().unwrap()
     }
 
-    pub fn get_chunk(&self, chunk_y_index: usize) -> Option<&Chunk> {
+    pub fn get_sub_chunk(&self, chunk_y_index: usize) -> Option<&SubChunk> {
-        self.chunks[chunk_y_index].as_ref()
+        self.sub_chunks[chunk_y_index].as_ref()
     }
 
-    pub fn get_chunk_mut(&mut self, chunk_y_index: usize) -> Option<&mut Chunk> {
+    pub fn get_sub_chunk_mut(&mut self, chunk_y_index: usize) -> Option<&mut SubChunk> {
-        self.chunks[chunk_y_index].as_mut()
+        self.sub_chunks[chunk_y_index].as_mut()
     }
 
     pub fn set_voxel(&mut self, world_pos: Vector3i, is_solid: bool) -> bool {
-        let chunk_index = Self::get_chunk_index(self.chunk_size.y, world_pos.y);
+        let chunk_index = Self::get_sub_chunk_index(self.chunk_size.y, world_pos.y);
         if chunk_index < CHUNKS_PER_COLUMN {
             let size = self.chunk_size;
-            let chunk = self.get_or_create_chunk(chunk_index as i32);
+            let chunk = self.get_or_create_sub_chunk(chunk_index as i32);
 
             let local_x = world_pos.x.rem_euclid(size.x);
             let local_y = Self::get_local_y(size.y, world_pos.y);
@@ -72,8 +77,8 @@ impl ChunkColumn {
     }
 
     pub fn get_voxel(&self, world_pos: Vector3i) -> bool {
-        let chunk_index = Self::get_chunk_index(self.chunk_size.y, world_pos.y);
+        let chunk_index = Self::get_sub_chunk_index(self.chunk_size.y, world_pos.y);
-        if let Some(chunk) = self.get_chunk(chunk_index) {
+        if let Some(chunk) = self.get_sub_chunk(chunk_index) {
             let local_x = world_pos.x.rem_euclid(CHUNK_SIZE);
             let local_y = Self::get_local_y(self.chunk_size.y, world_pos.y);
             let local_z = world_pos.z.rem_euclid(CHUNK_SIZE);

src/chunk/mod.rs

@@ -3,7 +3,7 @@ pub mod chunk_manager;
 pub mod column;
 pub mod mesh;
 
-pub use chunk::Chunk;
+pub use chunk::SubChunk;
 pub use chunk_manager::ChunkManager;
-pub use column::ChunkColumn;
+pub use column::Chunk;
 pub use mesh::ChunkMesh;

src/editor/mod.rs

@@ -1,5 +1,6 @@
 pub mod voxel_registry;
 pub mod world_config;
+pub mod world_generator;
 pub mod world_node;
 pub mod world_plugin;
 

src/editor/world_config.rs

@@ -1,9 +1,11 @@
 use godot::{
-    classes::{IResource, Resource, class_macros::private::virtuals::Os::Vector3i},
+    classes::{IResource, Resource},
-    obj::Base,
+    obj::{Base, Gd},
     prelude::{GodotClass, godot_api},
 };
 
+use crate::editor::world_generator::WorldGeneratorResource;
+
 #[derive(GodotClass)]
 #[class(base=Resource)]
 pub struct WorldConfig {
@@ -11,9 +13,6 @@ pub struct WorldConfig {
 
     // ===== WORLD GROUP =====
     #[export_group(name = "World")]
-    #[export]
-    chunk_size: Vector3i,
-
     #[export(range = (2.0,64.0))]
     render_distance: u8,
 
@@ -23,13 +22,10 @@ pub struct WorldConfig {
     // ===== GENERATION GROUP =====
     #[export_group(name = "Generation")]
     #[export]
-    seed: i32,
+    generator: Option<Gd<WorldGeneratorResource>>,
-
-    #[export(range = (0.01, 4.0, 0.01))]
-    frequency: f32,
 
     #[export(range = (1.0, 10.0))]
-    terrain_height: u32,
+    surface_height: u8,
 }
 
 #[godot_api]
@@ -38,12 +34,11 @@ impl IResource for WorldConfig {
         // DEFAULT Values
         Self {
             base,
-            chunk_size: Vector3i::new(32, 32, 32),
             render_distance: 8,
-            worker_threads: 4,
+            worker_threads: 8,
-            seed: 1234,
+            generator: None,
-            frequency: 0.03,
+            // noise: None,
-            terrain_height: 6,
+            surface_height: 6,
         }
     }
 }

src/editor/world_generator.rs

@@ -0,0 +1,154 @@
+use godot::{
+    classes::{FastNoiseLite, Resource},
+    obj::{Base, Gd},
+    prelude::{Export, GodotClass, GodotConvert, Var},
+};
+
+use crate::runtime::types::IntoRuntime;
+use fastnoise_lite::FastNoiseLite as RustNoise;
+
+#[derive(GodotConvert, Var, Export, Debug, Clone, Copy, PartialEq)]
+#[godot(via = i64)]
+pub enum WorldGeneratorType {
+    Noise2D,
+    Noise3D,
+    Graph,
+    Flat,
+}
+
+impl Default for WorldGeneratorType {
+    fn default() -> Self {
+        WorldGeneratorType::Noise2D
+    }
+}
+
+#[derive(GodotClass, Debug)]
+#[class(init, base=Resource)]
+pub struct WorldGeneratorResource {
+    #[base]
+    base: Base<Resource>,
+
+    #[export]
+    pub noise2d: Option<Gd<FastNoiseLite>>,
+}
+impl WorldGeneratorResource {
+    fn convert_noise_type(
+        ty: godot::classes::fast_noise_lite::NoiseType,
+    ) -> fastnoise_lite::NoiseType {
+        use fastnoise_lite::NoiseType as R;
+        use godot::classes::fast_noise_lite::NoiseType as G;
+
+        match ty {
+            G::SIMPLEX => R::OpenSimplex2,
+            G::SIMPLEX_SMOOTH => R::OpenSimplex2S,
+            G::PERLIN => R::Perlin,
+            G::VALUE => R::Value,
+            G::VALUE_CUBIC => R::ValueCubic,
+            G::CELLULAR => R::Cellular,
+            _ => R::OpenSimplex2S, // reasonable default
+        }
+    }
+
+    fn convert_fractal_type(
+        ft: godot::classes::fast_noise_lite::FractalType,
+        dft: godot::classes::fast_noise_lite::DomainWarpFractalType,
+    ) -> fastnoise_lite::FractalType {
+        use fastnoise_lite::FractalType as R;
+        use godot::classes::fast_noise_lite::DomainWarpFractalType as D;
+        use godot::classes::fast_noise_lite::FractalType as G;
+
+        // Priority: domain-warp fractals first
+        let domain_fractal = match dft {
+            D::PROGRESSIVE => Some(R::DomainWarpProgressive),
+            D::INDEPENDENT => Some(R::DomainWarpIndependent),
+            D::NONE => None,
+            _ => None,
+        };
+
+        if let Some(df) = domain_fractal {
+            return df;
+        }
+
+        // Then normal fractals
+        match ft {
+            G::NONE => R::None,
+            G::FBM => R::FBm,
+            G::RIDGED => R::Ridged,
+            G::PING_PONG => R::PingPong,
+            _ => R::None,
+        }
+    }
+    fn convert_cellular_distance_function(
+        fnc: godot::classes::fast_noise_lite::CellularDistanceFunction,
+    ) -> fastnoise_lite::CellularDistanceFunction {
+        use fastnoise_lite::CellularDistanceFunction as R;
+        use godot::classes::fast_noise_lite::CellularDistanceFunction as G;
+
+        match fnc {
+            G::EUCLIDEAN => R::Euclidean,
+            G::EUCLIDEAN_SQUARED => R::EuclideanSq,
+            G::MANHATTAN => R::Manhattan,
+            G::HYBRID => R::Hybrid,
+            _ => R::Euclidean,
+        }
+    }
+    fn convert_cellular_return_type(
+        ret: godot::classes::fast_noise_lite::CellularReturnType,
+    ) -> fastnoise_lite::CellularReturnType {
+        use fastnoise_lite::CellularReturnType as R;
+        use godot::classes::fast_noise_lite::CellularReturnType as G;
+
+        match ret {
+            G::CELL_VALUE => R::CellValue,
+            G::DISTANCE => R::Distance,
+            G::DISTANCE2 => R::Distance2,
+            G::DISTANCE2_ADD => R::Distance2Add,
+            G::DISTANCE2_SUB => R::Distance2Sub,
+            G::DISTANCE2_MUL => R::Distance2Mul,
+            G::DISTANCE2_DIV => R::Distance2Div,
+            _ => R::CellValue,
+        }
+    }
+    fn convert_domain_warp_type(
+        warp: godot::classes::fast_noise_lite::DomainWarpType,
+    ) -> fastnoise_lite::DomainWarpType {
+        use fastnoise_lite::DomainWarpType as R;
+        use godot::classes::fast_noise_lite::DomainWarpType as G;
+
+        match warp {
+            G::SIMPLEX => R::OpenSimplex2,
+            G::SIMPLEX_REDUCED => R::OpenSimplex2Reduced,
+            G::BASIC_GRID => R::BasicGrid,
+            _ => R::OpenSimplex2,
+        }
+    }
+}
+
+impl IntoRuntime<RustNoise> for WorldGeneratorResource {
+    fn into_runtime(&self) -> RustNoise {
+        match &self.noise2d {
+            Some(noise) => {
+                let mut rn = RustNoise::new();
+                rn.set_seed(Some(noise.get_seed()));
+                rn.set_frequency(Some(noise.get_frequency()));
+                rn.set_noise_type(Some(Self::convert_noise_type(noise.get_noise_type())));
+                rn.set_fractal_type(Some(Self::convert_fractal_type(
+                    noise.get_fractal_type(),
+                    noise.get_domain_warp_fractal_type(),
+                )));
+                rn.set_cellular_distance_function(Some(Self::convert_cellular_distance_function(
+                    noise.get_cellular_distance_function(),
+                )));
+                rn.set_cellular_return_type(Some(Self::convert_cellular_return_type(
+                    noise.get_cellular_return_type(),
+                )));
+                rn.set_domain_warp_type(Some(Self::convert_domain_warp_type(
+                    noise.get_domain_warp_type(),
+                )));
+
+                return rn;
+            }
+            None => return RustNoise::new(),
+        }
+    }
+}

src/editor/world_node.rs

@@ -1,12 +1,9 @@
-use godot::classes::{INode3D, VoxelGi};
+use godot::classes::INode3D;
 use godot::prelude::*;
 
 use crate::editor::VoxelRegistry;
 use crate::editor::world_config::WorldConfig;
-use crate::generation::SimpleSurfaceGenerator;
+use crate::runtime::Runtime;
-use crate::generation::generator::SurfaceGenerator;
-use crate::meshing::{Mesher, TexturedMesher};
-use crate::terrain::TerrainManager;
 
 #[derive(GodotClass)]
 #[class(base=Node3D,tool)]
@@ -23,10 +20,12 @@ pub struct World {
     #[export]
     registry: Option<Gd<VoxelRegistry>>,
 
-    // runtime systems
+    state: WorldState,
-    terrain_manager: TerrainManager,
+}
-    runtime_generator: Box<dyn SurfaceGenerator>,
+
-    runtime_mesher: Box<dyn Mesher>,
+pub enum WorldState {
+    Uninitialized,
+    Ready { runtime: Runtime },
 }
 
 #[godot_api]
@@ -37,36 +36,33 @@ impl INode3D for World {
             base,
             config: None,
             registry: None,
-            terrain_manager: TerrainManager::new(),
+            state: WorldState::Uninitialized,
-            runtime_generator: Box::new(SimpleSurfaceGenerator::defaults()),
-            runtime_mesher: Box::new(TexturedMesher::new()),
         }
     }
 
     fn process(&mut self, _delta: f64) {
-        self.add_pending_mesh_instances_to_scene();
+        // self.add_pending_mesh_instances_to_scene();
     }
 
     fn ready(&mut self) {
-        if self.registry.is_none() {
+        self.initialize_runtime();
-            godot_error!(
+    }
-                "VoxelRegistry not assigned! Please assign a VoxelRegistry resource in the editor."
-            );
-            return;
 }
 
-        let surface_generator = Box::new(SimpleSurfaceGenerator::new(
+impl World {
-            self.world_seed,
+    fn initialize_runtime(&mut self) {
-            self.noise_frequency,
+        match (&self.registry, &self.config) {
-            self.terrain_height,
+            (Some(reg), Some(cfg)) => {
-            self.chunk_size,
+                let cfg_ref = cfg.bind();
-        ));
+                let reg_ref = reg.bind();
-        self.surface_generator = surface_generator;
+                let runtime = Runtime::new(cfg_ref, reg_ref);
-        self.chunk_manager.chunk_size = self.chunk_size;
+                self.state = WorldState::Ready { runtime };
-        self.chunk_manager.terrain_height = self.terrain_height;
+            }
-
+            _ => {
-        self.regenerate_terrain();
+                godot_error!("World: missing resources (config or registry).");
-        godot_print!("World ready! building GI...");
+                self.state = WorldState::Uninitialized;
+            }
+        }
     }
 }
 
@@ -76,100 +72,82 @@ impl INode3D for World {
 ***/
 #[godot_api]
 impl World {
-    fn apply_config(&mut self) {
-        let Some(config) = &self.config else {
-            godot_error!("VoxelWorld: Missing WorldConfig resource");
-            return;
-        };
-
-        let cfg = config.bind();
-
-        self.chunk_manager.chunk_size = cfg.chunk_size;
-        self.chunk_manager.render_distance = cfg.render_distance;
-        self.chunk_manager.terrain_height = cfg.height;
-
-        self.generator = Box::new(SimpleSurfaceGenerator::new(
-            cfg.seed,
-            cfg.frequency,
-            cfg.height,
-            cfg.chunk_size,
-        ));
-    }
-
     #[func]
-    fn generate_terrain(&mut self) {
+    fn generate_world(&mut self, center_pos: Vector3i) {}
-        match &self.registry {
+    // #[func]
-            None => {
+    // fn generate_terrain(&mut self) {
-                godot_print!("No Voxel registry is provided to the world.")
+    //     match &self.registry {
-            }
+    //         None => {
-            Some(registry) => {
+    //             godot_print!("No Voxel registry is provided to the world.")
-                let distance = self.render_distance as i32;
+    //         }
-                let library_ref = registry.bind();
+    //         Some(registry) => {
+    //             let distance = self.render_distance as i32;
+    //             let library_ref = registry.bind();
 
-                for index_x in -distance..=distance {
+    //             for index_x in -distance..=distance {
-                    for index_z in -distance..=distance {
+    //                 for index_z in -distance..=distance {
-                        self.chunk_manager.generate_chunk_column(
+    //                     self.chunk_manager.generate_chunk_column(
-                            index_x,
+    //                         index_x,
-                            index_z,
+    //                         index_z,
-                            &library_ref,
+    //                         &library_ref,
-                            self.surface_generator.as_ref(),
+    //                         self.surface_generator.as_ref(),
-                            self.mesher.as_ref(),
+    //                         self.mesher.as_ref(),
-                        );
+    //                     );
-                    }
+    //                 }
-                }
+    //             }
-                godot_print!("Textured terrain regenerated!");
+    //             godot_print!("Textured terrain regenerated!");
-            }
+    //         }
-        }
+    //     }
-    }
+    // }
 
-    #[func]
+    // #[func]
-    fn regenerate_terrain(&mut self) {
+    // fn regenerate_terrain(&mut self) {
-        godot_print!("Regenerating terrain...");
+    //     godot_print!("Regenerating terrain...");
 
-        self.chunk_manager.clear();
+    //     self.chunk_manager.clear();
 
-        // Create textured mesher
+    //     // Create textured mesher
-        self.mesher = Box::new(TexturedMesher::new());
+    //     self.mesher = Box::new(TexturedMesher::new());
 
-        self.generate_terrain();
+    //     self.generate_terrain();
-    }
+    // }
 
-    #[func]
+    // #[func]
-    fn clear_terrain(&mut self) {
+    // fn clear_terrain(&mut self) {
-        godot_print!("Clearing Terrain...");
+    //     godot_print!("Clearing Terrain...");
 
-        self.chunk_manager.clear();
+    //     self.chunk_manager.clear();
 
-        self.chunk_manager.pending_mesh_instances.clear();
+    //     self.chunk_manager.pending_mesh_instances.clear();
-        self.chunk_manager.renderer.clear_and_destroy();
+    //     self.chunk_manager.renderer.clear_and_destroy();
-    }
+    // }
 
-    #[func]
+    // #[func]
-    fn update_from_gdscript(&mut self, player_world_pos: Vector3) {
+    // fn update_from_gdscript(&mut self, player_world_pos: Vector3) {
-        match &self.registry {
+    //     match &self.registry {
-            None => return,
+    //         None => return,
-            Some(registry) => {
+    //         Some(registry) => {
-                let registry_ref = registry.bind();
+    //             let registry_ref = registry.bind();
-                self.chunk_manager.update_around_player(
+    //             self.chunk_manager.update_around_player(
-                    player_world_pos,
+    //                 player_world_pos,
-                    self.render_distance as i32,
+    //                 self.render_distance as i32,
-                    &registry_ref,
+    //                 &registry_ref,
-                    self.surface_generator.as_ref(),
+    //                 self.surface_generator.as_ref(),
-                    self.mesher.as_ref(),
+    //                 self.mesher.as_ref(),
-                );
+    //             );
-            }
+    //         }
-        }
+    //     }
-    }
+    // }
 
-    fn add_pending_mesh_instances_to_scene(&mut self) {
+    // fn add_pending_mesh_instances_to_scene(&mut self) {
-        let mesh_instances = self.chunk_manager.take_pending_mesh_instances();
+    //     let mesh_instances = self.chunk_manager.take_pending_mesh_instances();
-        if mesh_instances.is_empty() {
+    //     if mesh_instances.is_empty() {
-            return;
+    //         return;
-        }
+    //     }
-        let mut base = self.base_mut();
+    //     let mut base = self.base_mut();
 
-        for mesh_instance in mesh_instances {
+    //     for mesh_instance in mesh_instances {
-            base.add_child(&mesh_instance.upcast::<Node3D>());
+    //         base.add_child(&mesh_instance.upcast::<Node3D>());
-        }
+    //     }
-    }
+    // }
 }

src/generation/generator.rs

@@ -1,15 +1,6 @@
-use godot::classes::class_macros::private::virtuals::Os::Vector3i;
+use crate::chunk::Chunk;
 
-use crate::chunk::{Chunk, ChunkColumn, column};
+pub trait TerrainGenerator: Send + Sync {
-
+    fn sample_chunk(&self, column: &mut Chunk);
-pub trait WorldGenerator: Send + Sync {
+    fn sample_height(&self, x: f32, z: f32) -> f32;
-    fn generate_chunk(&self, chunk: &mut Chunk);
-    fn get_base_height(&self, x: f32, z: f32) -> f32;
-    fn should_be_solid(&self, density: f32, relative_height: f32) -> bool;
-    fn get_name(&self) -> &str;
-}
-
-pub trait SurfaceGenerator: Send + Sync {
-    fn generate(&self, column: &mut ChunkColumn);
-    fn sample_voxel(&self, pos: Vector3i) -> bool;
 }

src/generation/mod.rs

@@ -1,5 +1,4 @@
 pub mod generator;
 pub mod simple_heightmap;
 
-pub use generator::WorldGenerator;
 pub use simple_heightmap::SimpleSurfaceGenerator;

src/generation/simple_heightmap.rs

@@ -1,16 +1,15 @@
 use fastnoise_lite::{FastNoiseLite, FractalType};
-use godot::{classes::class_macros::private::virtuals::Os::Vector3i, global::pow};
+use godot::classes::class_macros::private::virtuals::Os::Vector3i;
 
-use crate::{chunk::ChunkColumn, generation::generator::SurfaceGenerator};
+use crate::chunk::{Chunk, chunk::CHUNK_SIZE};
 
 pub struct SimpleSurfaceGenerator {
     noise: FastNoiseLite,
     surface_height: u32,
-    chunk_size: Vector3i,
 }
 
 impl SimpleSurfaceGenerator {
-    pub fn new(seed: i32, frequency: f32, surface_height: u32, chunk_size: Vector3i) -> Self {
+    pub fn new(seed: i32, frequency: f32, surface_height: u32) -> Self {
         let mut noise = FastNoiseLite::new();
         noise.frequency = frequency;
         noise.noise_type = fastnoise_lite::NoiseType::OpenSimplex2;
@@ -20,7 +19,6 @@ impl SimpleSurfaceGenerator {
         Self {
             noise,
             surface_height,
-            chunk_size,
         }
     }
 
@@ -30,20 +28,20 @@ impl SimpleSurfaceGenerator {
     }
 }
 
-impl SurfaceGenerator for SimpleSurfaceGenerator {
+impl SimpleSurfaceGenerator {
-    fn generate(&self, column: &mut ChunkColumn) {
+    fn generate(&self, column: &mut Chunk) {
-        let size_x = self.chunk_size.x;
+        let size_x = CHUNK_SIZE;
-        let size_z = self.chunk_size.z;
+        let size_z = CHUNK_SIZE;
 
         let base_x = column.world_position.0 * size_x;
         let base_z = column.world_position.1 * size_z;
 
         let freq = 1.0 / 32.0;
 
-        let column_height = self.chunk_size.y * self.surface_height as i32;
+        let column_height = CHUNK_SIZE * self.surface_height as i32;
 
-        for x in 0..self.chunk_size.x {
+        for x in 0..CHUNK_SIZE {
-            for z in 0..self.chunk_size.z {
+            for z in 0..CHUNK_SIZE {
                 // world coordinates of this column
                 let world_x = base_x + x;
                 let world_z = base_z + z;
@@ -71,7 +69,7 @@ impl SurfaceGenerator for SimpleSurfaceGenerator {
 
         let noise = Self::normalize_value(noise);
 
-        let column_height = self.chunk_size.y * self.surface_height as i32;
+        let column_height = CHUNK_SIZE * self.surface_height as i32;
         let height = (noise.powi(2) * column_height as f32) as i32;
 
         pos.y <= height

src/lib.rs

@@ -7,7 +7,7 @@ mod editor;
 mod generation;
 mod meshing;
 mod rendering;
-mod terrain;
+mod runtime;
 
 struct FastVoxel;
 

src/meshing/binary_greedy_mesher.rs

@@ -1,5 +1,5 @@
 use crate::chunk::chunk::CHUNK_SIZE;
-use crate::chunk::{Chunk, ChunkMesh};
+use crate::chunk::{SubChunk, ChunkMesh};
 use crate::editor::voxel_registry::VoxelRegistry;
 use crate::meshing::Mesher;
 use godot::prelude::*;
@@ -20,7 +20,7 @@ impl BinaryGreedyMesher {
         Self
     }
 
-    pub fn generate_mesh(&self, chunk: &Chunk, mesh: &mut ChunkMesh) {
+    pub fn generate_mesh(&self, chunk: &SubChunk, mesh: &mut ChunkMesh) {
         mesh.vertices.clear();
         mesh.normals.clear();
         mesh.indices.clear();
@@ -34,7 +34,7 @@ impl BinaryGreedyMesher {
         self.mesh_face(chunk, mesh, 5); // +Z (forward)
     }
 
-    fn mesh_face(&self, chunk: &Chunk, mesh: &mut ChunkMesh, face_dir: usize) {
+    fn mesh_face(&self, chunk: &SubChunk, mesh: &mut ChunkMesh, face_dir: usize) {
         let size = CHUNK_SIZE as usize;
 
         // For each slice perpendicular to the face direction
@@ -191,7 +191,7 @@ impl BinaryGreedyMesher {
         quad: GreedyQuad,
         face_dir: usize,
         axis: usize,
-        chunk: &Chunk,
+        chunk: &SubChunk,
     ) {
         let base_idx = mesh.vertices.len() as i32;
 
@@ -297,13 +297,13 @@ impl BinaryGreedyMesher {
 }
 
 impl Mesher for BinaryGreedyMesher {
-    fn generate_mesh(&self, chunk: &Chunk, mesh: &mut ChunkMesh) {
+    fn generate_mesh(&self, chunk: &SubChunk, mesh: &mut ChunkMesh) {
         self.generate_mesh(chunk, mesh);
     }
 
     fn generate_mesh_with_registry(
         &self,
-        chunk: &Chunk,
+        chunk: &SubChunk,
         _registry: &VoxelRegistry,
         mesh: &mut ChunkMesh,
     ) {

src/meshing/mesher.rs

@@ -1,12 +1,12 @@
-use crate::chunk::{Chunk, ChunkMesh};
+use crate::chunk::{ChunkMesh, SubChunk};
 use crate::editor::voxel_registry::VoxelRegistry;
 use godot::prelude::*;
 
 pub trait Mesher: Send + Sync {
-    fn generate_mesh(&self, chunk: &Chunk, mesh: &mut ChunkMesh);
+    fn generate_mesh(&self, chunk: &SubChunk, mesh: &mut ChunkMesh);
     fn generate_mesh_with_registry(
         &self,
-        chunk: &Chunk,
+        chunk: &SubChunk,
         registry: &VoxelRegistry,
         mesh: &mut ChunkMesh,
     );
@@ -24,7 +24,7 @@ impl CullingMesher {
 impl Mesher for CullingMesher {
     fn generate_mesh_with_registry(
         &self,
-        chunk: &Chunk,
+        chunk: &SubChunk,
         registry: &VoxelRegistry,
         mesh: &mut ChunkMesh,
     ) {
@@ -32,7 +32,7 @@ impl Mesher for CullingMesher {
         self.generate_mesh(chunk, mesh);
     }
 
-    fn generate_mesh(&self, chunk: &Chunk, mesh: &mut ChunkMesh) {
+    fn generate_mesh(&self, chunk: &SubChunk, mesh: &mut ChunkMesh) {
         mesh.clear();
 
         // Simple CullingMesher - generate a quad for each solid voxel face
@@ -72,7 +72,7 @@ impl CullingMesher {
         z: i32,
         voxel: bool,
         mesh: &mut ChunkMesh,
-        chunk: &Chunk,
+        chunk: &SubChunk,
     ) {
         let color = Color {
             r: 255.0,

src/meshing/textured_mesher.rs

@@ -1,5 +1,5 @@
 use crate::chunk::chunk::CHUNK_SIZE;
-use crate::chunk::{Chunk, ChunkMesh};
+use crate::chunk::{SubChunk, ChunkMesh};
 use crate::editor::voxel_registry::{VoxelModel, VoxelRegistry};
 use crate::meshing::Mesher;
 use godot::prelude::*;
@@ -74,7 +74,7 @@ impl TexturedMesher {
         ]
     }
     #[inline(always)]
-    fn is_face_visible(chunk: &Chunk, x: usize, y: usize, z: usize, face: usize) -> bool {
+    fn is_face_visible(chunk: &SubChunk, x: usize, y: usize, z: usize, face: usize) -> bool {
         // Convert to i32 for neighbor calculation
         let (nx, ny, nz) = match face {
             0 => (x as i32 - 1, y as i32, z as i32), // LEFT
@@ -108,7 +108,7 @@ impl TexturedMesher {
         z: usize,
         model: &VoxelModel, // Already borrowed, no binding needed
         mesh: &mut ChunkMesh,
-        chunk: &Chunk,
+        chunk: &SubChunk,
     ) {
         let pos = Vector3::new(x as f32, y as f32, z as f32);
 
@@ -168,13 +168,13 @@ impl TexturedMesher {
 }
 
 impl Mesher for TexturedMesher {
-    fn generate_mesh(&self, chunk: &Chunk, mesh: &mut ChunkMesh) {
+    fn generate_mesh(&self, chunk: &SubChunk, mesh: &mut ChunkMesh) {
         panic!("TexturedMesher requires a VoxelRegistry. Use generate_mesh_with_registry instead.");
     }
 
     fn generate_mesh_with_registry(
         &self,
-        chunk: &Chunk,
+        chunk: &SubChunk,
         registry: &VoxelRegistry,
         mesh: &mut ChunkMesh,
     ) {

src/rendering/renderer.rs

@@ -1,6 +1,6 @@
 use std::collections::HashMap;
 
-use crate::chunk::{Chunk, ChunkMesh};
+use crate::chunk::{ChunkMesh, SubChunk};
 use godot::{
     classes::{
         ArrayMesh, Material, MeshInstance3D, ResourceLoader, StandardMaterial3D,
@@ -40,7 +40,7 @@ impl Renderer {
             .and_then(|resource| resource.try_cast::<Material>().ok())
     }
 
-    pub fn render_chunk(&mut self, chunk: &Chunk, mesh: &ChunkMesh) -> Gd<MeshInstance3D> {
+    pub fn render_chunk(&mut self, chunk: &SubChunk, mesh: &ChunkMesh) -> Gd<MeshInstance3D> {
         let chunk_key = chunk.world_position;
         let chunk_key_i32 = (chunk_key.0 as i32, chunk_key.1 as i32, chunk_key.2 as i32);
 
@@ -137,7 +137,11 @@ impl Renderer {
         mesh_instance
     }
 
-    pub fn render_chunk_with_uvs(&mut self, chunk: &Chunk, mesh: &ChunkMesh) -> Gd<MeshInstance3D> {
+    pub fn render_chunk_with_uvs(
+        &mut self,
+        chunk: &SubChunk,
+        mesh: &ChunkMesh,
+    ) -> Gd<MeshInstance3D> {
         let chunk_key = chunk.world_position;
         let chunk_key_i32 = (chunk_key.0 as i32, chunk_key.1 as i32, chunk_key.2 as i32);
 

src/runtime/mod.rs

@@ -0,0 +1,5 @@
+pub mod runtime;
+pub mod types;
+
+pub use runtime::Runtime;
+pub use runtime::*;

src/runtime/runtime.rs

@@ -1,17 +1,17 @@
 use std::collections::HashMap;
 
-use crate::{chunk::ChunkColumn, editor::world_config::WorldConfig, rendering::Renderer};
+use crate::{chunk::Chunk, runtime::types::WorldConfig};
 
-pub struct TerrainManager {
+pub struct Runtime {
-    chunks: HashMap<(i32, i32), ChunkColumn>,
+    chunks: HashMap<(i32, i32), Chunk>,
     // renderer: Renderer,
 }
 
-impl TerrainManager {
+impl Runtime {
-    pub fn new(config: WorldConfig) -> Self {
+    pub fn new(config: WorldConfig, registry: VoxelRegistry) -> Self {
         // Terrain Size calculation
-        let width = config.get_render_distance() * 2 + 1;
+        let width = config.render_distance * 2 + 1;
-        let height = config.get_terrain_height() as u8;
+        let height = config.surface_height as u8;
         let capacity = (width * width * height) as usize;
 
         Self {
@@ -28,7 +28,7 @@ impl TerrainManager {
              * We preallocate this capacity to minimize HashMap reallocations as the
              * visible terrain around the player is populated.
              ***/
-            chunks: HashMap::with_capacity(capacity),
+            chunks: HashMap::<(i32, i32), Chunk>::with_capacity(capacity),
         }
     }
 }

src/runtime/types.rs

@@ -0,0 +1,17 @@
+use crate::generation::generator::TerrainGenerator;
+
+pub trait IntoRuntime<T> {
+    fn into_runtime(&self) -> T;
+}
+
+pub struct WorldConfig {
+    // ===== WORLD GROUP =====
+    pub render_distance: u8,
+
+    pub worker_threads: u8,
+
+    pub surface_height: u8,
+
+    // ===== GENERATION GROUP =====
+    generator: Box<dyn TerrainGenerator>,
+}

src/terrain/mod.rs

@@ -1,3 +0,0 @@
-pub mod terrain_manager;
-
-pub use terrain_manager::TerrainManager;