feat(world): add day/night cycle with server tick system

include/Cubed/dev_panel.hpp

@@ -44,8 +44,11 @@ private:
     bool m_need_save_config = false;
     bool m_gen_thread_running = true;
     int m_theme = 0;
+    int m_pre_set_day_tick = 0;
+    int m_pre_set_tick_speed = 0;
     void show_about_table_bar();
     void show_biome_table_bar();
+    void show_time_table_bar();
     void show_cave_table_bar();
     void show_river_table_bar();
     void show_settings_tab_item();

include/Cubed/gameplay/game_time.hpp

@@ -0,0 +1,9 @@
+#pragma once
+
+using TickType = long long;
+
+constexpr int DEFAULT_PER_TICK_TIME = 50;
+
+constexpr TickType DAY_TIME = 24000;
+
+constexpr TickType PER_HOUR = 1000;

include/Cubed/gameplay/world.hpp

@@ -2,6 +2,7 @@
 #include "Cubed/AABB.hpp"
 #include "Cubed/gameplay/cave_carver.hpp"
 #include "Cubed/gameplay/chunk.hpp"
+#include "Cubed/gameplay/game_time.hpp"
 #include "Cubed/gameplay/river_worm.hpp"
 
 #include <atomic>
@@ -39,13 +40,21 @@ private:
         std::unordered_map<ChunkPos, const Chunk*, ChunkPos::Hash>;
     using ChunkPosSet = std::unordered_set<ChunkPos, ChunkPos::Hash>;
     using ChunkHashMap = std::unordered_map<ChunkPos, Chunk, ChunkPos::Hash>;
+
     glm::vec3 m_gen_player_pos{0.0f, 0.0f, 0.0f};
-    glm::vec3 m_sunlight_dir{1.0f, 2.0f, 1.0f};
     ChunkHashMap m_chunks;
     std::unordered_map<std::size_t, Player> m_players;
     std::vector<glm::vec4> m_planes;
 
     std::thread m_gen_thread;
+    std::thread m_server_thread;
+
+    std::stop_source m_server_stop_source;
+
+    std::atomic<int> m_per_tick_time = DEFAULT_PER_TICK_TIME; // ms
+
+    std::atomic<TickType> m_day_tick = 6000;
+
     mutable std::mutex m_chunks_mutex;
     std::mutex m_gen_signal_mutex;
     std::mutex m_new_chunk_queue_mutex;
@@ -62,6 +71,9 @@ private:
     std::atomic<bool> m_could_gen{true};
     std::atomic<int> m_rendering_distance{24};
     std::atomic<float> m_chunk_gen_fraction{0.0f};
+
+    std::atomic<TickType> m_game_ticks{0};
+
     std::vector<ChunkPos> m_dirty_queue;
     std::vector<ChunkRenderSnapshot> m_render_snapshots;
     std::vector<std::pair<ChunkPos, Chunk>> m_new_chunk;
@@ -120,7 +132,10 @@ public:
     int rendering_distance() const;
     void rendering_distance(int rendering_distance);
     void start_gen_thread();
+    void start_server_thread();
     void stop_gen_thread();
+    void stop_server_thread();
+    void serever_run(std::stop_token stoken);
 
     CaveCarver& cave_carcer();
     RiverWorm& river_worm();
@@ -128,6 +143,11 @@ public:
     std::vector<ChunkRenderSnapshot>& render_snapshots();
 
     glm::vec3 sunlight_dir() const;
+    TickType game_tick() const;
+    TickType day_tick() const;
+    void day_tick(TickType tick);
+    int per_tick_time() const;
+    void per_tick_time(int ms);
 };
 
 } // namespace Cubed

include/Cubed/renderer.hpp

@@ -31,6 +31,13 @@ public:
 
 private:
     static constexpr glm::vec3 SUNLIGHT_COLOR{1.0f, 1.0f, 1.0f};
+    static constexpr glm::vec3 SUN_COLOR{1.00f, 0.95f, 0.80f};
+    static constexpr glm::vec3 MOON_COLOR{0.75f, 0.80f, 1.00f};
+    static constexpr glm::vec3 SKY_COLOR{0.529, 0.808, 0.922};
+    static constexpr float FAR_PLANE = 1000.0f;
+    static constexpr float NEAR_PLANE = 0.1f;
+    static constexpr float SUN_SIZE = 50.0f;
+    static constexpr float MOON_SIZE = 50.0f;
     const Camera& m_camera;
     DevPanel& m_dev_panel;
     const TextureManager& m_texture_manager;
@@ -75,6 +82,7 @@ private:
     2 - outline vao
     3 - ui vao
     4 - text vao
+
     */
     std::vector<GLuint> m_vao;
     std::vector<Vertex2D> m_ui;