diff --git a/.gitignore b/.gitignore
index e660240..6d5d972 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,4 +39,5 @@ CMakeError.log
 *.swp
 *.swo
 *~
-.DS_Store
\ No newline at end of file
+.DS_Store
+assets/config.toml
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 61c7d42..21d6b8d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -87,6 +87,7 @@ add_executable(${PROJECT_NAME}
     src/app.cpp
     src/debug_collector.cpp
     src/camera.cpp
+    src/config.cpp
     src/gameplay/biome.cpp
     src/gameplay/chunk.cpp
     src/gameplay/player.cpp
diff --git a/include/Cubed/camera.hpp b/include/Cubed/camera.hpp
index cdfa523..5676ea4 100644
--- a/include/Cubed/camera.hpp
+++ b/include/Cubed/camera.hpp
@@ -27,6 +27,7 @@ public:
     void update_move_camera();
 
     void camera_init(Player* player);
+    void hot_reload();
     void reset_camera();
     void update_cursor_position_camera(double xpos, double ypos);
 
diff --git a/include/Cubed/config.hpp b/include/Cubed/config.hpp
index a20a2da..a80f9ea 100644
--- a/include/Cubed/config.hpp
+++ b/include/Cubed/config.hpp
@@ -1,5 +1,8 @@
 #pragma once
 #include <array>
+#include <toml++/toml.hpp>
+
+#include <Cubed/tools/cubed_assert.hpp>
 
 namespace Cubed {
 
@@ -8,149 +11,118 @@ constexpr int MAX_BLOCK_NUM = 7;
 constexpr int MAX_UI_NUM = 1;
 
 constexpr int CHUCK_SIZE = 16;
-constexpr int DISTANCE = 24;
+constexpr int PRE_LOAD_DISTANCE = 24;
+constexpr int MAX_DISTANCE = 128;
 constexpr int MAX_BLOCK_STATUS = 1;
 constexpr int MAX_CHARACTER = 128;
 constexpr float NORMAL_FOV = 70.0f;
 
 constexpr int MAX_BIOME_SUM = 4;
 using HeightMapArray = std::array<std::array<float, CHUCK_SIZE>, CHUCK_SIZE>;
-constexpr float VERTICES_POS[6][6][3] = {
-        // ===== front (z = +1) =====
-        0.0f, 0.0f, 1.0f,  // bottom left
-        0.0f, 1.0f, 1.0f,  // top left
-        1.0f, 1.0f, 1.0f,  // top right
-        1.0f, 1.0f, 1.0f,  // top right
-        1.0f, 0.0f, 1.0f,  // bottom right
-        0.0f, 0.0f, 1.0f,  // bottom left
-        // ===== right (x = +1) =====
-        1.0f, 0.0f, 1.0f,  // bottom front
-        1.0f, 0.0f, 0.0f,  // bottom back
-        1.0f, 1.0f, 0.0f,  // top back
-        1.0f, 1.0f, 0.0f,  // top back
-        1.0f, 1.0f, 1.0f,  // top front
-        1.0f, 0.0f, 1.0f,  // bottom front
-        // ===== back (z = -1) =====
-        0.0f, 0.0f, 0.0f,  // bottom left
-        1.0f, 0.0f, 0.0f,  // bottom right
-        1.0f, 1.0f, 0.0f,  // top right
-        1.0f, 1.0f, 0.0f,  // top right
-        0.0f, 1.0f, 0.0f,  // top left
-        0.0f, 0.0f, 0.0f,  // bottom left
-        // ===== left (x = -1) =====
-        0.0f, 0.0f, 0.0f,  // bottom back
-        0.0f, 0.0f, 1.0f,  // bottom front
-        0.0f, 1.0f, 1.0f,  // top front
-        0.0f, 1.0f, 1.0f,  // top front
-        0.0f, 1.0f, 0.0f,  // top back
-        0.0f, 0.0f, 0.0f,  // bottom back
-        // ===== top (y = +1) =====
-        0.0f, 1.0f, 0.0f,  // back left
-        1.0f, 1.0f, 0.0f,  // back right
-        1.0f, 1.0f, 1.0f,  // front right
-        1.0f, 1.0f, 1.0f,  // front right
-        0.0f, 1.0f, 1.0f,  // front left
-        0.0f, 1.0f, 0.0f,  // back left
-        // ===== bottom (y = -1) =====
-        0.0f, 0.0f, 1.0f,  // front left
-        1.0f, 0.0f, 1.0f,  // front right
-        1.0f, 0.0f, 0.0f,  // back right
-        1.0f, 0.0f, 0.0f,  // back right
-        0.0f, 0.0f, 0.0f,  // back left
-        0.0f, 0.0f, 1.0f   // front left
-    };
-
-constexpr float TEX_COORDS[6][6][2] = {
-    // ===== front (z = +1) =====
-    0.0f, 1.0f,  // bottom left
-    0.0f, 0.0f,  // top left
-    1.0f, 0.0f,  // top right
-    1.0f, 0.0f,  // top right
-    1.0f, 1.0f,  // bottom right
-    0.0f, 1.0f,  // bottom left
-    // ===== right (x = +1) =====
-    0.0f, 1.0f,  // bottom front
-    1.0f, 1.0f,  // bottom back
-    1.0f, 0.0f,  // top back
-    1.0f, 0.0f,  // top back
-    0.0f, 0.0f,  // top front
-    0.0f, 1.0f,  // bottom front
-    // ===== back (z = -1) =====
-    1.0f, 1.0f,  // bottom left
-    0.0f, 1.0f,  // bottom right
-    0.0f, 0.0f,  // top right
-    0.0f, 0.0f,  // top right
-    1.0f, 0.0f,  // top left
-    1.0f, 1.0f,  // bottom left
-    // ===== left (x = -1) =====
-    1.0f, 1.0f,  // bottom back
-    0.0f, 1.0f,  // bottom front
-    0.0f, 0.0f,  // top front
-    0.0f, 0.0f,  // top front
-    1.0f, 0.0f,  // top back
-    1.0f, 1.0f,  // bottom back
-    // ===== top (y = +1) =====
-    0.0f, 0.0f,  // back left
-    1.0f, 0.0f,  // back right
-    1.0f, 1.0f,  // front right
-    1.0f, 1.0f,  // front right
-    0.0f, 1.0f,  // front left
-    0.0f, 0.0f,  // back left
-    // ===== bottom (y = -1) =====
-    0.0f, 0.0f,  // front left
-    1.0f, 0.0f,  // front right
-    1.0f, 1.0f,  // back right
-    1.0f, 1.0f,  // back right
-    0.0f, 1.0f,  // back left
-    0.0f, 0.0f,  // front left
-};
-
-constexpr float CUBE_VER[24] = {
-        0.0, 0.0, 0.0,
-        1.0, 0.0, 0.0,
-        1.0, 1.0, 0.0,
-        0.0, 1.0, 0.0,
-        0.0, 0.0, 1.0,
-        1.0, 0.0, 1.0,
-        1.0, 1.0, 1.0,
-        0.0, 1.0, 1.0
-    };
 
 
-constexpr int OUTLINE_CUBE_INDICES[24] = {
-        0,1, 1,2, 2,3, 3,0,
-        4,5, 5,6, 6,7, 7,4,
-        0,4, 1,5, 2,6, 3,7
-    };
+template <typename T>
+concept TomlValueType = 
+    std::same_as<T, int> ||
+    std::same_as<T, bool> ||
+    std::same_as<T, double> ||
+    std::same_as<T, const char*> ||
+    std::same_as<T, toml::date> ||
+    std::same_as<T, toml::time> ||
+    std::same_as<T, toml::date_time> ||
+    std::same_as<T, std::string> 
+    ;
 
-constexpr float SQUARE_VERTICES[6][2] = {
-        -0.5f, -0.5f,  // bottom left
-        -0.5f,  0.5f,  // top left
-        0.5f,  0.5f,  // top right
-        0.5f,  0.5f,  // top right
-        0.5f, -0.5f,  // bottom right
-        -0.5f, -0.5f   // bottom left
-    };
+class Config {
+public:
+    Config();
+    ~Config();
 
-constexpr float SQUARE_TEXTURE_POS[6][2] = {
-        0.0f, 0.0f,
-        0.0f, 1.0f,
-        1.0f, 1.0f,
-        1.0f, 1.0f,
-        1.0f, 0.0f,
-        0.0f, 0.0f,
-    };
+    static Config& get();
 
-struct Vertex {
-    float x = 0.0f, y = 0.0f, z = 0.0f;
-    float s = 0.0f, t = 0.0f;
-    float layer = 0.0f;
-};
+    toml::table& table();
+
+    void load_or_create_config();
+    void save_to_file();
+
+    template <TomlValueType T>
+    T get(std::string_view key) const{
+        size_t cur = 0;
+        auto pos = key.find('.');
+        const toml::table* table = &m_tbl;
+        while (pos != std::string_view::npos) {
+            std::string_view s = key.substr(cur, pos - cur);
+            if (s.empty()) {
+                Logger::error("Empty key/table name in path '{}'", key);
+                ASSERT(false);
+                std::abort();
+            }
+            cur = pos + 1;
+            pos = key.find('.', cur);
+            if (auto* next = (*table)[s].as_table()) {
+                table = next;
+            } else {
+                Logger::error("Can't find table {}", s);
+                ASSERT(false);
+                std::abort();
+            }
+        }
+        std::string_view n_key = key.substr(cur);
+        if (n_key.empty()) {
+            Logger::error("Trailing dot in path '{}'", key);
+            ASSERT(false);
+            std::abort();
+        }
+        auto opt = (*table)[n_key].value<T>();
+        if (opt){
+            return *opt;
+        } else {
+            Logger::error("Can't find key {}", n_key);
+            ASSERT(false);
+            std::abort();
+        }
+    }
+    template <typename T>
+    void set(std::string_view key, T&& val) {
+        if constexpr (!TomlValueType<std::decay_t<T>>) {
+            static_assert(false, "Type Not Support");
+        } 
+        size_t cur = 0;
+        auto pos = key.find('.');
+        toml::table* table = &m_tbl;
+        while (pos != std::string_view::npos) {
+            std::string_view s = key.substr(cur, pos - cur);
+            if (s.empty()) {
+                Logger::error("Empty key/table name in path '{}'", key);
+                ASSERT(false);
+                std::abort();
+            }
+            cur = pos + 1;
+            pos = key.find('.', cur);
+            if (auto* next = (*table)[s].as_table()) {
+                table = next;
+            } else {
+                auto [it, inserted] = table->insert_or_assign(s, toml::table{});
+                table = it->second.as_table();
+            }
+            
+        }
+        std::string_view n_key = key.substr(cur);
+        if (n_key.empty()) {
+            Logger::error("Trailing dot in path '{}'", key);
+            ASSERT(false);
+            std::abort();
+        }
+        table->insert_or_assign(n_key, std::forward<T>(val));
+        save_to_file();
+    }
+
+private:
+    
+    toml::table m_tbl;
+    constexpr static inline std::string_view CONGIF_PATH = ASSETS_PATH"config.toml";
+    void create_config();
 
-struct Vertex2D {
-    float x = 0.0f, y = 0.0f;
-    float s = 0.0f, t = 0.0f;
-    float layer = 0.0f;
 };
 
 }
diff --git a/include/Cubed/debug_collector.hpp b/include/Cubed/debug_collector.hpp
index b16930f..6072896 100644
--- a/include/Cubed/debug_collector.hpp
+++ b/include/Cubed/debug_collector.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <Cubed/primitive_data.hpp>
 #include <Cubed/ui/text.hpp>
 
 #include <unordered_map>
diff --git a/include/Cubed/gameplay/chunk.hpp b/include/Cubed/gameplay/chunk.hpp
index 9e5aef4..b39a087 100644
--- a/include/Cubed/gameplay/chunk.hpp
+++ b/include/Cubed/gameplay/chunk.hpp
@@ -4,6 +4,7 @@
 #include <cstdint>
 
 #include <Cubed/config.hpp>
+#include <Cubed/primitive_data.hpp>
 #include <Cubed/gameplay/biome.hpp>
 #include <Cubed/gameplay/chunk_pos.hpp>
 #include <Cubed/gameplay/block.hpp>
diff --git a/include/Cubed/gameplay/player.hpp b/include/Cubed/gameplay/player.hpp
index be45090..1171f75 100644
--- a/include/Cubed/gameplay/player.hpp
+++ b/include/Cubed/gameplay/player.hpp
@@ -49,7 +49,7 @@ private:
     glm::vec3 move_distance {0.0f, 0.0f, 0.0f};
     // player is tow block tall, the pos is the lower pos
     
-    glm::vec3 m_player_pos {0.0f, 120.0f, 0.0f};
+    glm::vec3 m_player_pos {0.0f, 255.0f, 0.0f};
     ChunkPos m_player_chunk_pos {0, 0};
 
     glm::vec3 m_front {0, 0, -1};
@@ -84,12 +84,15 @@ public:
     const MoveState& get_move_state() const;
     
     void change_mode(GameMode mode);
+    void hot_reload();
     void set_player_pos(const glm::vec3& pos);
     void update(float delta_time);
     void update_front_vec(float offset_x, float offset_y);
     void update_player_move_state(int key, int action);
     void update_scroll(double yoffset);
 
+    
+
 };
 
 
diff --git a/include/Cubed/gameplay/world.hpp b/include/Cubed/gameplay/world.hpp
index 4abbf34..005d362 100644
--- a/include/Cubed/gameplay/world.hpp
+++ b/include/Cubed/gameplay/world.hpp
@@ -7,6 +7,7 @@
 #include <unordered_map>
 #include <unordered_set>
 #include <Cubed/AABB.hpp>
+#include <Cubed/primitive_data.hpp>
 #include <Cubed/gameplay/chunk.hpp>
 
 namespace Cubed {
@@ -45,7 +46,7 @@ private:
     std::condition_variable m_gen_cv;
     std::atomic<bool> m_gen_running{false};
     std::atomic<bool> m_need_gen_chunk{false};
-
+    std::atomic<int> m_rendering_distance{24};
     std::vector<ChunkPos> m_dirty_queue;
     std::vector<ChunkRenderSnapshot> m_render_snapshots;
     std::vector<std::pair<ChunkPos, Chunk>> m_new_chunk;
@@ -90,6 +91,8 @@ public:
     
     void push_delete_vbo(GLuint vbo);
 
+    void hot_reload();
+
 };
 
 }
diff --git a/include/Cubed/primitive_data.hpp b/include/Cubed/primitive_data.hpp
new file mode 100644
index 0000000..84dd58c
--- /dev/null
+++ b/include/Cubed/primitive_data.hpp
@@ -0,0 +1,143 @@
+#pragma once
+
+namespace Cubed {
+
+constexpr float VERTICES_POS[6][6][3] = {
+    // ===== front (z = +1) =====
+    {{0.0f, 0.0f, 1.0f},  // bottom left
+     {0.0f, 1.0f, 1.0f},  // top left
+     {1.0f, 1.0f, 1.0f},  // top right
+     {1.0f, 1.0f, 1.0f},  // top right
+     {1.0f, 0.0f, 1.0f},  // bottom right
+     {0.0f, 0.0f, 1.0f}}, // bottom left
+    // ===== right (x = +1) =====
+    {{1.0f, 0.0f, 1.0f},  // bottom front
+     {1.0f, 0.0f, 0.0f},  // bottom back
+     {1.0f, 1.0f, 0.0f},  // top back
+     {1.0f, 1.0f, 0.0f},  // top back
+     {1.0f, 1.0f, 1.0f},  // top front
+     {1.0f, 0.0f, 1.0f}}, // bottom front
+    // ===== back (z = -1) =====
+    {{0.0f, 0.0f, 0.0f},  // bottom left
+     {1.0f, 0.0f, 0.0f},  // bottom right
+     {1.0f, 1.0f, 0.0f},  // top right
+     {1.0f, 1.0f, 0.0f},  // top right
+     {0.0f, 1.0f, 0.0f},  // top left
+     {0.0f, 0.0f, 0.0f}}, // bottom left
+    // ===== left (x = -1) =====
+    {{0.0f, 0.0f, 0.0f},  // bottom back
+     {0.0f, 0.0f, 1.0f},  // bottom front
+     {0.0f, 1.0f, 1.0f},  // top front
+     {0.0f, 1.0f, 1.0f},  // top front
+     {0.0f, 1.0f, 0.0f},  // top back
+     {0.0f, 0.0f, 0.0f}}, // bottom back
+    // ===== top (y = +1) =====
+    {{0.0f, 1.0f, 0.0f},  // back left
+     {1.0f, 1.0f, 0.0f},  // back right
+     {1.0f, 1.0f, 1.0f},  // front right
+     {1.0f, 1.0f, 1.0f},  // front right
+     {0.0f, 1.0f, 1.0f},  // front left
+     {0.0f, 1.0f, 0.0f}}, // back left
+    // ===== bottom (y = -1) =====
+    {{0.0f, 0.0f, 1.0f},  // front left
+     {1.0f, 0.0f, 1.0f},  // front right
+     {1.0f, 0.0f, 0.0f},  // back right
+     {1.0f, 0.0f, 0.0f},  // back right
+     {0.0f, 0.0f, 0.0f},  // back left
+     {0.0f, 0.0f, 1.0f}}  // front left
+};
+
+constexpr float TEX_COORDS[6][6][2] = {
+    // ===== front (z = +1) =====
+    {{0.0f, 1.0f},  // bottom left
+     {0.0f, 0.0f},  // top left
+     {1.0f, 0.0f},  // top right
+     {1.0f, 0.0f},  // top right
+     {1.0f, 1.0f},  // bottom right
+     {0.0f, 1.0f}}, // bottom left
+    // ===== right (x = +1) =====
+    {{0.0f, 1.0f},  // bottom front
+     {1.0f, 1.0f},  // bottom back
+     {1.0f, 0.0f},  // top back
+     {1.0f, 0.0f},  // top back
+     {0.0f, 0.0f},  // top front
+     {0.0f, 1.0f}}, // bottom front
+    // ===== back (z = -1) =====
+    {{1.0f, 1.0f},  // bottom left
+     {0.0f, 1.0f},  // bottom right
+     {0.0f, 0.0f},  // top right
+     {0.0f, 0.0f},  // top right
+     {1.0f, 0.0f},  // top left
+     {1.0f, 1.0f}}, // bottom left
+    // ===== left (x = -1) =====
+    {{1.0f, 1.0f},  // bottom back
+     {0.0f, 1.0f},  // bottom front
+     {0.0f, 0.0f},  // top front
+     {0.0f, 0.0f},  // top front
+     {1.0f, 0.0f},  // top back
+     {1.0f, 1.0f}}, // bottom back
+    // ===== top (y = +1) =====
+    {{0.0f, 0.0f},  // back left
+     {1.0f, 0.0f},  // back right
+     {1.0f, 1.0f},  // front right
+     {1.0f, 1.0f},  // front right
+     {0.0f, 1.0f},  // front left
+     {0.0f, 0.0f}}, // back left
+    // ===== bottom (y = -1) =====
+    {{0.0f, 0.0f},  // front left
+     {1.0f, 0.0f},  // front right
+     {1.0f, 1.0f},  // back right
+     {1.0f, 1.0f},  // back right
+     {0.0f, 1.0f},  // back left
+     {0.0f, 0.0f}}  // front left
+};
+
+constexpr float CUBE_VER[24] = {
+        0.0, 0.0, 0.0,
+        1.0, 0.0, 0.0,
+        1.0, 1.0, 0.0,
+        0.0, 1.0, 0.0,
+        0.0, 0.0, 1.0,
+        1.0, 0.0, 1.0,
+        1.0, 1.0, 1.0,
+        0.0, 1.0, 1.0
+    };
+
+
+constexpr int OUTLINE_CUBE_INDICES[24] = {
+        0,1, 1,2, 2,3, 3,0,
+        4,5, 5,6, 6,7, 7,4,
+        0,4, 1,5, 2,6, 3,7
+    };
+
+constexpr float SQUARE_VERTICES[6][2] = {
+        {-0.5f, -0.5f},  // bottom left
+        {-0.5f,  0.5f},  // top left
+        { 0.5f,  0.5f},  // top right
+        { 0.5f,  0.5f},  // top right
+        { 0.5f, -0.5f},  // bottom right
+        {-0.5f, -0.5f}   // bottom left
+};
+
+constexpr float SQUARE_TEXTURE_POS[6][2] = {
+        {0.0f, 0.0f},
+        {0.0f, 1.0f},
+        {1.0f, 1.0f},
+        {1.0f, 1.0f},
+        {1.0f, 0.0f},
+        {0.0f, 0.0f},
+    };
+
+struct Vertex {
+    float x = 0.0f, y = 0.0f, z = 0.0f;
+    float s = 0.0f, t = 0.0f;
+    float layer = 0.0f;
+};
+
+struct Vertex2D {
+    float x = 0.0f, y = 0.0f;
+    float s = 0.0f, t = 0.0f;
+    float layer = 0.0f;
+};
+
+}
\ No newline at end of file
diff --git a/include/Cubed/renderer.hpp b/include/Cubed/renderer.hpp
index 82186c8..2d4ebb5 100644
--- a/include/Cubed/renderer.hpp
+++ b/include/Cubed/renderer.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <Cubed/config.hpp>
+#include <Cubed/primitive_data.hpp>
 #include <Cubed/shader.hpp>
 #include <Cubed/ui/text.hpp>
 
@@ -18,6 +19,7 @@ public:
 
     Renderer(const Camera& camera, World& world, const TextureManager& texture_manager);
     ~Renderer();
+    void hot_reload();
     void init();
     const Shader& get_shader(const std::string& name) const;
     void render();
diff --git a/include/Cubed/tools/font.hpp b/include/Cubed/tools/font.hpp
index 45f330b..6b4437c 100644
--- a/include/Cubed/tools/font.hpp
+++ b/include/Cubed/tools/font.hpp
@@ -9,6 +9,7 @@
 #include <unordered_map>
 
 #include <Cubed/config.hpp>
+#include <Cubed/primitive_data.hpp>
 
 namespace Cubed {
 
diff --git a/include/Cubed/ui/text.hpp b/include/Cubed/ui/text.hpp
index 65258a6..b7533d7 100644
--- a/include/Cubed/ui/text.hpp
+++ b/include/Cubed/ui/text.hpp
@@ -3,9 +3,9 @@
 #include <glad/glad.h>
 #include <glm/glm.hpp>
 #include <string>
-#include <vector>
 
 #include <Cubed/config.hpp>
+#include <Cubed/primitive_data.hpp>
 #include <Cubed/ui/color.hpp>
 namespace Cubed {
 
diff --git a/include/Cubed/window.hpp b/include/Cubed/window.hpp
index 6defe05..4ef58e9 100644
--- a/include/Cubed/window.hpp
+++ b/include/Cubed/window.hpp
@@ -13,6 +13,9 @@ public:
     GLFWwindow* get_glfw_window();
     void init();
     void update_viewport();
+    // end of frame to reload!
+    void hot_reload();
+
     void toggle_fullscreen();
     void toggle_mouse_able();
     
diff --git a/src/camera.cpp b/src/camera.cpp
index 5a67e3d..dbf776e 100644
--- a/src/camera.cpp
+++ b/src/camera.cpp
@@ -21,6 +21,11 @@ void Camera::camera_init(Player* player) {
     m_player = player;
     update_move_camera();
     reset_camera();
+    hot_reload();
+}
+
+void Camera::hot_reload() {
+
 }
 
 void Camera::reset_camera() {
diff --git a/src/config.cpp b/src/config.cpp
new file mode 100644
index 0000000..adfdd89
--- /dev/null
+++ b/src/config.cpp
@@ -0,0 +1,83 @@
+#include <Cubed/config.hpp>
+#include <Cubed/tools/cubed_assert.hpp>
+#include <Cubed/tools/log.hpp>
+
+#include <filesystem>
+#include <fstream>
+namespace fs = std::filesystem;
+
+using namespace std::string_view_literals;
+
+namespace Cubed {
+
+Config::Config() {
+    load_or_create_config();
+}
+
+Config::~Config() {
+    save_to_file();
+}
+
+Config& Config::get() {
+    static Config instance;
+    return instance;
+}
+
+toml::table& Config::table() {
+    return m_tbl;
+}
+
+void Config::create_config() {
+    static constexpr auto SOURCE = R"(
+        version = "0.0.1"
+
+        [window]
+        width = 800
+        height = 600
+        fullscreen = false
+        V-Sync = true
+
+        [player]
+        fov = 70.0 
+        mouse_sensitivity = 0.15
+
+        [world]
+        rendering_distance = 24
+        
+    )"sv;
+
+    try {
+        m_tbl = toml::parse(SOURCE);
+    } catch (const toml::parse_error& err) {
+        Logger::error("Load Config Error {}", err.what());
+        ASSERT(false);
+        std::abort();
+    }
+    Logger::info("Create New Config File Success");
+
+}
+
+void Config::load_or_create_config() {
+    fs::path config_path {CONGIF_PATH};
+    if (!fs::is_regular_file(config_path)) {
+        create_config();
+    } else try {
+        m_tbl = toml::parse_file(config_path.string());
+    } catch (const toml::parse_error& err) {
+        Logger::error("Load Config Error: \"{}\"", err.what());
+        create_config();
+    }
+    
+    Logger::info("Load Config File Success");
+
+}
+
+void Config::save_to_file() {
+    fs::path config_path {CONGIF_PATH};
+    std::ofstream file{config_path};
+    file << m_tbl;
+    Logger::info("Save File Success");
+}
+
+
+}
\ No newline at end of file
diff --git a/src/debug_collector.cpp b/src/debug_collector.cpp
index 0f1b009..dfa8005 100644
--- a/src/debug_collector.cpp
+++ b/src/debug_collector.cpp
@@ -1,5 +1,6 @@
 #include <Cubed/debug_collector.hpp>
 
+#include <Cubed/config.hpp>
 #include <Cubed/tools/system_info.hpp>
 #include <Cubed/tools/cubed_hash.hpp>
 
@@ -30,7 +31,7 @@ void DebugCollector::init_text() {
         .position(0.0f, 100.0f)
         .scale(0.8f)
         .color(Color::WHITE)
-        .text("Version: v0.0.1-Debug");
+        .text("Version: " + Config::get().get<std::string>("version"));
     fps_text
         .position(0.0f, 50.0f)
         .text("FPS: 0");
diff --git a/src/gameplay/player.cpp b/src/gameplay/player.cpp
index 9ab1ab1..a0178ba 100644
--- a/src/gameplay/player.cpp
+++ b/src/gameplay/player.cpp
@@ -13,7 +13,7 @@ Player::Player(World& world, const std::string& name) :
     m_name(name),
     m_world(world)    
 {
-
+    hot_reload();
 }
 Player::~Player() {
 
@@ -144,6 +144,12 @@ void Player::change_mode(GameMode mode) {
     }
 }
 
+void Player::hot_reload() {
+    auto& config = Config::get();
+    m_sensitivity = static_cast<float>(config.get<double>("player.mouse_sensitivity"));
+
+}
+
 void Player::set_player_pos(const glm::vec3& pos) {
     m_player_pos = pos;
 }
diff --git a/src/gameplay/world.cpp b/src/gameplay/world.cpp
index 0e3a571..255278b 100644
--- a/src/gameplay/world.cpp
+++ b/src/gameplay/world.cpp
@@ -74,12 +74,12 @@ Player& World::get_player(const std::string& name){
 }
 
 void World::init_world() {
-    m_chunks.reserve(DISTANCE * DISTANCE);
+    m_chunks.reserve(MAX_DISTANCE * MAX_DISTANCE);
     auto t1 = std::chrono::system_clock::now();
-    for (int s = 0; s < DISTANCE; s++) {
-        for (int t = 0; t < DISTANCE; t++) {
-            int ns = s - DISTANCE / 2;
-            int nt = t - DISTANCE / 2;
+    for (int s = 0; s < PRE_LOAD_DISTANCE; s++) {
+        for (int t = 0; t < PRE_LOAD_DISTANCE; t++) {
+            int ns = s - PRE_LOAD_DISTANCE / 2;
+            int nt = t - PRE_LOAD_DISTANCE / 2;
 
             ChunkPos pos{ns, nt};
 
@@ -97,7 +97,7 @@ void World::init_world() {
     Logger::info("TestPlayer Create Finish");
 
     start_gen_thread();
-
+    hot_reload();
 }
 /*
 void World::init_chunks() {
@@ -385,8 +385,8 @@ void World::compute_required_chunks(ChunkPosSet& required_chunks) {
     auto [chunk_x, chunk_z] = chunk_pos(x, z);
     
 
-    required_chunks.reserve(DISTANCE * DISTANCE);
-    int half = DISTANCE / 2;
+    required_chunks.reserve(m_rendering_distance * m_rendering_distance);
+    int half = m_rendering_distance / 2;
     for (int u = chunk_x - half; u <= chunk_x + half; ++u) {
         for (int v = chunk_z - half; v <= chunk_z + half; ++v) {
             required_chunks.emplace(u, v);
@@ -664,4 +664,11 @@ void World::push_delete_vbo(GLuint vbo) {
     m_pending_delete_vbo.push_back(vbo);
 }
 
+void World::hot_reload() {
+    auto & config = Config::get();
+    int dist = config.get<int>("world.rendering_distance");
+    m_rendering_distance = dist <= MAX_DISTANCE ? dist : MAX_DISTANCE;
+    need_gen();
+}
+
 }
\ No newline at end of file
diff --git a/src/renderer.cpp b/src/renderer.cpp
index 7aeeebb..8191fd9 100644
--- a/src/renderer.cpp
+++ b/src/renderer.cpp
@@ -1,6 +1,7 @@
 #include <Cubed/app.hpp>
 #include <Cubed/camera.hpp>
 #include <Cubed/config.hpp>
+#include <Cubed/primitive_data.hpp>
 #include <Cubed/debug_collector.hpp>
 #include <Cubed/gameplay/player.hpp>
 #include <Cubed/gameplay/world.hpp>
@@ -37,7 +38,10 @@ Renderer::~Renderer() {
     glDeleteVertexArrays(NUM_VAO, m_vao.data());
 }
 
-
+void Renderer::hot_reload() {
+    auto& config = Config::get();
+    update_fov(config.get<double>("player.fov"));
+}
 
 void Renderer::init() {
     if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
@@ -109,6 +113,7 @@ void Renderer::init() {
     glBindBuffer(GL_ARRAY_BUFFER, 0);
 
     init_text();
+    hot_reload();
 }
 
 const Shader& Renderer::get_shader(const std::string& name) const {
diff --git a/src/window.cpp b/src/window.cpp
index f122ab1..9be32eb 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -5,6 +5,9 @@
 #include <Cubed/window.hpp>
 namespace Cubed {
 
+static int windowed_xpos = 0, windowed_ypos = 0;
+static int windowed_width = 800, windowed_height = 600;
+
 Window::Window(Renderer& renderer) :
     m_renderer(renderer)
 {
@@ -37,7 +40,10 @@ void Window::update_viewport() {
     m_aspect = (float)m_width / (float)m_height;
     glViewport(0, 0, m_width, m_height);
     m_renderer.update_proj_matrix(m_aspect, m_width, m_height) ;
+    auto& config = Config::get();
 
+    config.set("window.width", windowed_width);
+    config.set("window.height", windowed_height);
 }
 
 void Window::init() {
@@ -49,11 +55,23 @@ void Window::init() {
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
     glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE);
-    m_window = glfwCreateWindow(800, 600, "Cubed", NULL, NULL);
+    auto& config= Config::get();
+    m_width = config.get<int>("window.width");
+    m_height = config.get<int>("window.height");
+    if (config.get<bool>("window.fullscreen")) {
+        GLFWmonitor* primary_monitor = glfwGetPrimaryMonitor();
+        m_window = glfwCreateWindow(m_width, m_height, "Cubed", primary_monitor, NULL);
+    } else {
+        m_window = glfwCreateWindow(m_width, m_height, "Cubed", NULL, NULL);
+    }
     
     glfwMakeContextCurrent(m_window);
-
-    glfwSwapInterval(1);   
+    if (config.get<bool>("window.V-Sync")) {
+        glfwSwapInterval(1);   
+    } else {
+        glfwSwapInterval(0);   
+    }
+    
     
     glfwSetInputMode(m_window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     if (glfwRawMouseMotionSupported()) {
@@ -69,12 +87,21 @@ void Window::init() {
     
 }
 
-void Window::toggle_fullscreen() {
-    static int windowed_xpos = 0, windowed_ypos = 0;
-    static int windowed_width = 800, windowed_height = 600;
+void Window::hot_reload() {
+    auto& config= Config::get();
+    // V-Sync
+    if (config.get<bool>("window.V-Sync")) {
+        glfwSwapInterval(1);   
+    } else {
+        glfwSwapInterval(0);   
+    }
+    // Window
+    windowed_width = config.get<int>("window.width");
+    windowed_height = config.get<int>("window.height");
 
-    GLFWmonitor* monitor = glfwGetWindowMonitor(m_window);
-    if (monitor != nullptr) {
+    if (config.get<bool>("window.fullscreen.V-Sync")) {
+        GLFWmonitor* monitor = glfwGetWindowMonitor(m_window);
+        if (monitor != nullptr) {
         glfwSetWindowMonitor(
             m_window, 
             nullptr, 
@@ -84,6 +111,10 @@ void Window::toggle_fullscreen() {
             windowed_height, 
             0
         );
+        } else {
+
+        }
+        config.set("window.fullscreen", false);
     } else {
         glfwGetWindowPos(m_window, &windowed_xpos, &windowed_ypos);
         glfwGetWindowSize(m_window, &windowed_width, &windowed_height);
@@ -100,6 +131,47 @@ void Window::toggle_fullscreen() {
             mode->height, 
             GL_DONT_CARE
         );
+        config.set("window.fullscreen", true);
+        
+    }
+    update_viewport();
+
+}
+
+void Window::toggle_fullscreen() {
+
+    auto& config = Config::get();
+    GLFWmonitor* monitor = glfwGetWindowMonitor(m_window);
+    if (monitor != nullptr) {
+        glfwSetWindowMonitor(
+            m_window, 
+            nullptr, 
+            windowed_xpos, 
+            windowed_ypos, 
+            windowed_width, 
+            windowed_height, 
+            0
+        );
+        
+        config.set("window.fullscreen", false);
+    } else {
+        glfwGetWindowPos(m_window, &windowed_xpos, &windowed_ypos);
+        glfwGetWindowSize(m_window, &windowed_width, &windowed_height);
+
+        GLFWmonitor* primary = glfwGetPrimaryMonitor();
+        const GLFWvidmode* mode = glfwGetVideoMode(primary);
+
+        glfwSetWindowMonitor(
+            m_window, 
+            primary, 
+            0, 
+            0, 
+            mode->width, 
+            mode->height, 
+            GL_DONT_CARE
+        );
+        config.set("window.fullscreen", true);
+        
     }
     update_viewport();
 }