perf(server): parallelize entity update loop

Use parallel_do to process entities concurrently via the compute
pool. Switch get_all_session to a thread-safe
tbb::concurrent_vector and make ChunkEntity's ref_count atomic to
avoid data races. Also remove the debug pig spawn from world init.

AGENTS.md

@@ -0,0 +1,251 @@
+# Code Modification Guidelines
+
+## 1. Git Branch Protection
+
+- Never modify code directly on the `main` branch.
+- Before editing, check the current branch:
+
+```bash
+git branch --show-current
+````
+
+* If the result is `main`, create or switch to a development branch first:
+
+```bash
+git checkout -b feature/xxx
+```
+
+* Do not bypass branch protection by:
+
+  * Committing directly to `main`.
+  * Running code generation, formatting, or large refactors on `main`.
+  * Rewriting or damaging `main` history.
+
+---
+
+## 2. Code Comments
+
+* All new comments must be written in English.
+* Comments must be:
+
+  * Short and clear.
+  * Explain the purpose, not repeat the code.
+  * Avoid unnecessary details.
+
+Recommended:
+
+```cpp
+// AI-generated: Prevent stale handle access.
+```
+
+Avoid:
+
+```cpp
+// AI-generated: This checks if the handle is invalid because...
+```
+
+* Important AI-added or modified logic should include:
+
+```cpp
+// AI-generated
+```
+
+* Do not add comments for trivial changes such as:
+
+  * One or two line logic fixes.
+  * Spelling corrections.
+  * Simple variable renames.
+
+### 2.1 Do not write excessive or granular comments
+
+AI must avoid sprinkling small explanatory comments throughout code.
+Specifically:
+
+* **No line-by-line narration.** Do not add a comment above (or beside)
+  every field, signal, slot, branch, or block just to restate what it is.
+  If the name is self-explanatory, no comment is needed.
+* **No multi-part explanations on a single marker.** A line like
+  `// AI-generated: abort the in-flight download; finished handler clears state.`
+  is too much. Either drop it, or shorten to a single short clause
+  (e.g. `// AI-generated: abort in-flight download.`).
+* **Prefer zero or one comment per file/section**, not many. A short
+  header comment explaining the file's purpose is acceptable; dozens of
+  inline labels are not.
+* **Do not comment obvious QML/C++ bindings, layout splits, or default
+  values** (e.g. `// AI-generated: index 0 -> zh_CN, index 1 -> en.`).
+  The code already says that.
+* **When in doubt, omit the comment.** A missing comment is fine; a
+  redundant one is noise that future maintainers must clean up.
+
+Rule of thumb: if removing the comment would not lose useful
+information, remove it.
+
+---
+
+## 3. Project Style
+
+Follow the existing project style strictly:
+
+* Naming conventions.
+* File organization.
+* Formatting rules.
+* Include order.
+* Existing architecture.
+
+Do not:
+
+* Introduce unrelated coding styles.
+* Add unnecessary design patterns.
+* Create duplicate systems.
+* Add abstractions without need.
+* Change module responsibilities.
+
+---
+
+## 4. Modification Scope
+
+Only modify the minimum code required.
+
+Do not:
+
+* Format unrelated files.
+* Remove existing comments.
+* Rename large numbers of symbols.
+* Change public APIs.
+* Perform large refactors without confirmation.
+
+If large changes are required, explain first:
+
+1. Current problem.
+2. Required changes.
+3. Affected modules.
+4. Expected impact.
+
+---
+
+## 5. Build and Test
+
+After modifications:
+
+* Verify compilation.
+* Check for new warnings.
+* Ensure existing features still work.
+
+Do not:
+
+* Commit without verification.
+* Ignore compiler errors.
+* Hide problems with temporary hacks.
+
+---
+
+## 6. Compatibility
+
+Consider:
+
+* Existing callers.
+* API/ABI compatibility.
+* Serialization formats.
+* Network protocols.
+* Save data.
+* Threading impact.
+
+Do not:
+
+* Change network structures without compatibility handling.
+* Break old data formats.
+* Change public data layouts carelessly.
+
+---
+
+## 7. Multi-threading Safety
+
+For multi-threaded code, check:
+
+* Data races.
+* Object lifetime.
+* Lock contention.
+* Atomic correctness.
+* Cross-thread resource access.
+
+Do not:
+
+* Assume single-threaded execution.
+* Modify shared data without protection.
+* Add hidden locks that hurt performance.
+
+---
+
+## 8. Memory Safety
+
+Consider:
+
+* Ownership.
+* Lifetime.
+* RAII.
+* Memory leaks.
+* Dangling references.
+* Iterator invalidation.
+
+Do not:
+
+* Return references to local variables.
+* Store pointers to temporary objects.
+* Use uninitialized data.
+* Introduce undefined behavior.
+
+---
+
+## 9. Third-party Libraries
+
+Before adding or changing dependencies:
+
+Check:
+
+* Existing project dependencies.
+* Build system impact.
+* Maintenance cost.
+
+Do not:
+
+* Add large libraries for simple features.
+* Duplicate existing library functionality.
+* Modify third-party source code.
+
+---
+
+## 10. AI Behavior Rules
+
+AI-generated code must:
+
+* Reuse existing code first.
+* Preserve current architecture.
+* Prefer simple solutions.
+* Minimize risk and code changes.
+
+Do not:
+
+* Guess requirements.
+* Add unrequested features.
+* Redesign architecture.
+* Add unnecessary abstraction layers.
+
+Choose the implementation with:
+
+> The smallest change, lowest risk, and best compatibility with existing code.
+
+---
+
+## 11. Pre-commit Checklist
+
+Before committing:
+
+* [ ] Not on `main`.
+* [ ] Changes match the requested task.
+* [ ] New comments are in English.
+* [ ] AI changes are marked when needed.
+* [ ] No unrelated formatting changes.
+* [ ] Build passes.
+* [ ] No obvious performance/security/thread issues.
+* [ ] No API, protocol, or data format breakage.
+

CMakeLists.txt

@@ -148,6 +148,7 @@ target_link_libraries(${PROJECT_NAME}
         OpenAL::OpenAL
         harfbuzz::harfbuzz
         Opus::Opus
+        assimp::assimp
         $<$<PLATFORM_ID:Windows>:ws2_32>
 
 )

assets/data/block/air.toml

@@ -8,5 +8,4 @@ is_passable = true
 is_transitional = false
 is_transparent = true
 name = 'air'
-name_key = 'block.air'
 roughness = 1.0

assets/data/block/dirt.toml

@@ -8,5 +8,4 @@ is_passable = false
 is_transitional = true
 is_transparent = false
 name = 'dirt'
-name_key = 'block.dirt'
 roughness = 1.0

assets/data/block/grass.toml

@@ -8,5 +8,4 @@ is_passable = true
 is_transitional = false
 is_transparent = true
 name = 'grass'
-name_key = 'block.grass'
 roughness = 0.90000000000000002

assets/data/block/grass_block.toml

@@ -8,5 +8,4 @@ is_passable = false
 is_transitional = true
 is_transparent = false
 name = 'grass_block'
-name_key = 'block.grass_block'
 roughness = 0.90000000000000002

assets/data/block/leaf.toml

@@ -8,5 +8,4 @@ is_passable = false
 is_transitional = false
 is_transparent = true
 name = 'leaf'
-name_key = 'block.leaf'
 roughness = 0.69999999999999996

assets/data/block/log.toml

@@ -8,5 +8,4 @@ is_passable = false
 is_transitional = false
 is_transparent = false
 name = 'log'
-name_key = 'block.log'
 roughness = 0.69999999999999996

assets/data/block/sand.toml

@@ -8,5 +8,4 @@ is_passable = false
 is_transitional = true
 is_transparent = false
 name = 'sand'
-name_key = 'block.sand'
 roughness = 0.80000000000000004

assets/data/block/snowy_grass_block.toml

@@ -8,5 +8,4 @@ is_passable = false
 is_transitional = true
 is_transparent = false
 name = 'snowy_grass_block'
-name_key = 'block.snowy_grass_block'
 roughness = 0.90000000000000002

assets/data/block/stone.toml

@@ -8,5 +8,4 @@ is_passable = false
 is_transitional = true
 is_transparent = false
 name = 'stone'
-name_key = 'block.stone'
 roughness = 0.75

assets/data/block/template.toml

@@ -9,4 +9,3 @@ is_discard = false
 is_blend = false
 is_transitional = false
 roughness = 1.0
-name_key = "block.template"

assets/data/block/water.toml

@@ -8,5 +8,4 @@ is_passable = true
 is_transitional = false
 is_transparent = true
 name = 'water'
-name_key = 'block.water'
 roughness = 0.02

assets/item/air.json

@@ -0,0 +1,6 @@
+{
+    "id": 0,
+    "name": "air",
+    "description": "",
+    "type": "block"
+}

assets/item/dirt.json

@@ -0,0 +1,7 @@
+{
+    "id": 2,
+    "name": "dirt",
+    "description": "",
+    "texture": "texture/item/block/dirt.png",
+    "type": "block"
+}

assets/item/grass.json

@@ -0,0 +1,7 @@
+{
+    "id": 9,
+    "name": "grass",
+    "description": "",
+    "texture": "texture/item/block/grass.png",
+    "type": "block"
+}

assets/item/grass_block.json

@@ -0,0 +1,7 @@
+{
+    "id": 1,
+    "name": "grass_block",
+    "description": "",
+    "texture": "texture/item/block/grass_block.png",
+    "type": "block"
+}

assets/item/leaf.json

@@ -0,0 +1,7 @@
+{
+    "id": 6,
+    "name": "leaf",
+    "description": "",
+    "texture": "texture/item/block/leaf.png",
+    "type": "block"
+}

assets/item/log.json

@@ -0,0 +1,7 @@
+{
+    "id": 5,
+    "name": "log",
+    "description": "",
+    "texture": "texture/item/block/log.png",
+    "type": "block"
+}

assets/item/pig_spawn_egg.json

@@ -0,0 +1,8 @@
+{
+    "id": 10,
+    "name": "pig_spawn_egg",
+    "description": "",
+    "texture": "texture/item/spawn_egg/pig_spawn_egg.png",
+    "type": "spawn_egg",
+    "creature": "cubed:pig"
+}

assets/item/sand.json

@@ -0,0 +1,7 @@
+{
+    "id": 4,
+    "name": "sand",
+    "description": "",
+    "texture": "texture/item/block/sand.png",
+    "type": "block"
+}

assets/item/snowy_grass_block.json

@@ -0,0 +1,7 @@
+{
+    "id": 8,
+    "name": "snowy_grass_block",
+    "description": "",
+    "texture": "texture/item/block/snowy_grass_block.png",
+    "type": "block"
+}

assets/item/stone.json

@@ -0,0 +1,7 @@
+{
+    "id": 3,
+    "name": "stone",
+    "description": "",
+    "texture": "texture/item/block/stone.png",
+    "type": "block"
+}

assets/item/water.json

@@ -0,0 +1,7 @@
+{
+    "id": 7,
+    "name": "water",
+    "description": "",
+    "texture": "texture/item/block/water.png",
+    "type": "block"
+}

assets/lang/en_US.json

@@ -36,14 +36,15 @@
     "joingame.server_ip": "Server Ip",
     "joingame.join_world": "Join World",
     "error.disable_voice": "Server Disable Voice Chat",
-    "block.air": "air",
-    "block.dirt": "dirt",
-    "block.grass_block": "grass block",
-    "block.grass": "grass",
-    "block.leaf": "leaf",
-    "block.log": "log",
-    "block.sand": "sand",
-    "block.snowy_grass_block": "snowy grass block",
-    "block.stone": "stone",
-    "block.water": "water"
+    "item.air.name": "air",
+    "item.dirt.name": "dirt",
+    "item.grass_block.name": "grass block",
+    "item.grass.name": "grass",
+    "item.leaf.name": "leaf",
+    "item.log.name": "log",
+    "item.sand.name": "sand",
+    "item.snowy_grass_block.name": "snowy grass block",
+    "item.stone.name": "stone",
+    "item.water.name": "water",
+    "item.pig_spawn_egg.name": "pig spawn egg"
 }

assets/lang/zh_CN.json

@@ -36,14 +36,15 @@
     "joingame.server_ip": "服务器IP",
     "joingame.join_world": "加入世界",
     "error.disable_voice": "服务器已禁用语音聊天",
-    "block.air": "空气",
-    "block.dirt": "泥土",
-    "block.grass_block": "草方块",
-    "block.grass": "草",
-    "block.leaf": "树叶",
-    "block.log": "原木",
-    "block.sand": "沙子",
-    "block.snowy_grass_block": "覆雪草方块",
-    "block.stone": "石头",
-    "block.water": "水"
+    "item.air.name": "空气",
+    "item.dirt.name": "泥土",
+    "item.grass_block.name": "草方块",
+    "item.grass.name": "草",
+    "item.leaf.name": "树叶",
+    "item.log.name": "原木",
+    "item.sand.name": "沙子",
+    "item.snowy_grass_block.name": "覆雪草方块",
+    "item.stone.name": "石头",
+    "item.water.name": "水",
+    "item.pig_spawn_egg.name": "猪猪刷怪蛋"
 }

assets/model/creature/pig/collision.json

@@ -0,0 +1,16 @@
+{
+    "boxes": [
+        {
+            "center": [
+                0,
+                0.78,
+                0
+            ],
+            "half": [
+                0.53,
+                0.78,
+                0.406
+            ]
+        }
+    ]
+}

assets/shaders/depth_model_vert.glsl

@@ -7,7 +7,6 @@ uniform mat4 lightSpaceMatrix;
 uniform mat4 modelMatrix;
 
 out vec2 tc;
-flat out int tex_layer;
 
 void main() {
     tc = texCoord;

assets/shaders/model_vert.glsl

@@ -3,7 +3,6 @@
 layout (location = 0) in vec3 pos;
 layout (location = 1) in vec2 texCoord;
 layout (location = 2) in vec3 aNormal;
-layout (location = 3) in vec3 aTangent;
 
 uniform mat4 mv_matrix;
 uniform mat4 proj_matrix;

cmake/Dependencies.cmake

@@ -10,7 +10,7 @@ find_package(harfbuzz REQUIRED)
 find_package(Freetype REQUIRED)
 find_package(SDL3 REQUIRED)
 find_package(Opus REQUIRED)
-
+find_package(assimp REQUIRED)
 # Third-party libraries
 
 if (WIN32)

include/Cubed/AABB.hpp

@@ -1,20 +0,0 @@
-#pragma once
-#include <glm/glm.hpp>
-
-namespace Cubed {
-
-struct AABB {
-    glm::vec3 min{0.0f, 0.0f, 0.0f};
-    glm::vec3 max{0.0f, 0.0f, 0.0f};
-
-    AABB(glm::vec3 min_point, glm::vec3 max_point)
-        : min(min_point), max(max_point) {}
-
-    bool intersects(const AABB& other) const {
-        return (min.x <= other.max.x && max.x >= other.min.x) &&
-               (min.y <= other.max.y && max.y >= other.min.y) &&
-               (min.z <= other.max.z && max.z >= other.min.z);
-    }
-};
-
-} // namespace Cubed

include/Cubed/app.hpp

@@ -49,7 +49,6 @@ private:
     Window m_window;
 
     TextureManager m_texture_manager;
-
     AudioEngine m_audio;
 
     Renderer m_renderer;

include/Cubed/argument.hpp

@@ -13,5 +13,6 @@ struct Argument {
     std::optional<int> log_level;
     std::optional<bool> enable_filelog;
     std::optional<bool> enable_consolelog;
+    std::optional<bool> direct_enter;
 };
 } // namespace Cubed

include/Cubed/camera.hpp

@@ -8,7 +8,7 @@
 
 namespace Cubed {
 
-class ClientPlayer;
+class LocalPlayer;
 
 class Camera {
 private:
@@ -18,7 +18,7 @@ private:
         THIRD_PERSON_FRONT,
     };
 
-    ClientPlayer* m_player;
+    LocalPlayer* m_player;
     float m_last_mouse_x, m_last_mouse_y;
     glm::vec3 m_camera_pos;
     bool m_under_water = false;
@@ -35,7 +35,7 @@ public:
 
     void update_move_camera();
 
-    void camera_init(ClientPlayer* player);
+    void camera_init(LocalPlayer* player);
     void hot_reload();
     void update_cursor_position_camera(float offset_x, float offset_y);
 
@@ -47,7 +47,7 @@ public:
     void change_perspective();
     bool is_first_person() const;
     bool handle_event(const Event& e);
-    ClientPlayer* player();
+    LocalPlayer* player();
 };
 
 } // namespace Cubed

include/Cubed/dev_panel.hpp

@@ -7,7 +7,7 @@
 namespace Cubed {
 
 class WorldScene;
-class ClientPlayer;
+class LocalPlayer;
 class App;
 class DevPanel {
     struct ConfigView {
@@ -42,7 +42,7 @@ private:
     WorldScene& m_world_scene;
     Config& m_config;
     ConfigView m_config_view;
-    ClientPlayer* m_player;
+    LocalPlayer* m_player;
     PlayerProfile m_player_profile;
     bool m_need_save_config = false;
     bool m_gen_thread_running = true;

include/Cubed/gameplay/block.hpp

@@ -42,7 +42,6 @@ struct LookBlock {
 
 struct BlockData {
     std::string name;
-    std::string name_key;
     BlockType id = 0;
 
     bool is_liquid = false;
@@ -56,42 +55,14 @@ struct BlockData {
     bool is_blend = false;
     bool is_transitional = false;
     float roughness = 1.0f;
-    BlockData(std::string_view b_name, std::string_view name_k, BlockType b_id,
-              bool liquid, bool passable, bool cross_plane, bool transparent,
-              bool gas, bool discard, bool blend, bool transitional, float r)
-        : name(b_name), name_key(name_k), id(b_id), is_liquid(liquid),
-          is_gas(gas), is_passable(passable), is_cross_plane(cross_plane),
+    BlockData(std::string_view b_name, BlockType b_id, bool liquid,
+              bool passable, bool cross_plane, bool transparent, bool gas,
+              bool discard, bool blend, bool transitional, float r)
+        : name(b_name), id(b_id), is_liquid(liquid), is_gas(gas),
+          is_passable(passable), is_cross_plane(cross_plane),
           is_transparent(transparent), is_discard(discard), is_blend(blend),
           is_transitional(transitional), roughness(r) {}
-};
-
-class BlockManager {
-
-public:
-    static const std::vector<BlockData>& datas();
-    static void init();
-    static unsigned sums();
-    static unsigned cross_plane_sum();
-    static const std::string& name_form_id(BlockType id);
-    static std::string local_name(BlockType id);
-    static bool is_gas(BlockType id);
-    static bool is_liquid(BlockType id);
-
-    static bool is_cross_plane(BlockType id);
-    static bool is_transparent(BlockType id);
-    static bool is_passable(BlockType id);
-
-    static bool is_discard(BlockType id);
-    static bool is_blend(BlockType id);
-    static bool is_transitional(BlockType id);
-    static float roughness(BlockType id);
-    static BlockType cross_plane_index(BlockType id);
-
-private:
-    static void set_up_cross_plane_map();
-    static inline std::vector<BlockData> m_datas;
-    static inline bool is_init = false;
-    static inline std::unordered_map<BlockType, BlockType> m_cross_plane_map;
+    BlockData() { name = ""; }
 };
 
 } // namespace Cubed

include/Cubed/gameplay/block_manager.hpp

@@ -0,0 +1,45 @@
+#pragma once
+
+#include "Cubed/gameplay/block.hpp"
+
+#include <tbb/concurrent_hash_map.h>
+namespace Cubed {
+class BlockManager {
+
+public:
+    static void init();
+    static unsigned sums();
+    static unsigned cross_plane_sum();
+    static const std::string& name_form_id(BlockType id);
+    static bool is_gas(BlockType id);
+    static bool is_liquid(BlockType id);
+
+    static bool is_cross_plane(BlockType id);
+    static bool is_transparent(BlockType id);
+    static bool is_passable(BlockType id);
+
+    static bool is_discard(BlockType id);
+    static bool is_blend(BlockType id);
+    static bool is_transitional(BlockType id);
+    static float roughness(BlockType id);
+    static BlockType cross_plane_index(BlockType id);
+
+    static BlockType id_from_name(const std::string& name);
+
+private:
+    using BlockMap = tbb::concurrent_hash_map<BlockType, BlockData>;
+    using acc = BlockMap::accessor;
+    using cacc = BlockMap::const_accessor;
+    using IDMap = tbb::concurrent_hash_map<std::string, BlockType>;
+    using CrossPlaneMap = tbb::concurrent_hash_map<BlockType, BlockType>;
+
+    static inline const BlockData EMPTY;
+
+    static inline BlockMap m_datas;
+    static inline IDMap m_id_map;
+    static inline bool is_init = false;
+    static inline CrossPlaneMap m_cross_plane_map;
+    static void set_up_cross_plane_map(
+        const std::vector<std::pair<bool, BlockType>>& types);
+};
+} // namespace Cubed

include/Cubed/gameplay/chunk.hpp

@@ -0,0 +1,27 @@
+#pragma once
+#include "Cubed/gameplay/chunk_pos.hpp"
+
+#include <glm/glm.hpp>
+#include <tuple>
+namespace Cubed {
+class Chunk {
+public:
+    Chunk() = default;
+    Chunk(const Chunk&) = delete;
+    Chunk(Chunk&&) = delete;
+    Chunk& operator=(const Chunk&) = delete;
+    Chunk& operator=(Chunk&&) = delete;
+    virtual ~Chunk() = default;
+    static int index(int x, int y, int z);
+    static int index(const glm::vec3& pos);
+    static std::tuple<int, int, int> world_to_block(int world_x, int world_y,
+                                                    int world_z, int chunk_x,
+                                                    int chunk_z);
+    static std::tuple<int, int, int> world_to_block(const glm::ivec3& block_pos,
+                                                    ChunkPos chunk_pos);
+    static std::tuple<int, int, int> block_to_world(int x, int y, int z,
+                                                    int chunk_x, int chunk_z);
+    static std::tuple<int, int, int> block_to_world(const glm::ivec3& block_pos,
+                                                    ChunkPos chunk_pos);
+};
+} // namespace Cubed

include/Cubed/gameplay/chunk_generator.hpp

@@ -50,6 +50,8 @@ public:
     void generate_cave();
     void generate_river();
 
+    void spawn_creature();
+
 private:
     static inline std::atomic<bool> is_init{false};
     static inline unsigned m_generator_seed{0};

include/Cubed/gameplay/client_chunk.hpp

@@ -2,6 +2,7 @@
 #include "Cubed/constants.hpp"
 #include "Cubed/gameplay/biome.hpp"
 #include "Cubed/gameplay/block.hpp"
+#include "Cubed/gameplay/chunk.hpp"
 #include "Cubed/gameplay/chunk_pos.hpp"
 #include "Cubed/gameplay/vertex_data.hpp"
 #include "world/chunk_data.pb.h"
@@ -26,7 +27,7 @@ struct ChunkRenderSnapshot {
     glm::vec3 center;
     glm::vec3 half_extents;
 };
-class ClientChunk {
+class ClientChunk : public Chunk {
 public:
     ClientChunk(ClientWorld& world);
     ~ClientChunk();
@@ -35,17 +36,6 @@ public:
     ClientChunk(ClientChunk&&) noexcept;
     ClientChunk& operator=(ClientChunk&&) noexcept;
 
-    static int index(int x, int y, int z);
-    static int index(const glm::vec3& pos);
-    static std::tuple<int, int, int> world_to_block(int world_x, int world_y,
-                                                    int world_z, int chunk_x,
-                                                    int chunk_z);
-    static std::tuple<int, int, int> world_to_block(const glm::ivec3& block_pos,
-                                                    ChunkPos chunk_pos);
-    static std::tuple<int, int, int> block_to_world(int x, int y, int z,
-                                                    int chunk_x, int chunk_z);
-    static std::tuple<int, int, int> block_to_world(const glm::ivec3& block_pos,
-                                                    ChunkPos chunk_pos);
     BiomeType get_biome() const;
     ChunkPos get_chunk_pos() const;
     const std::vector<BlockType>& get_chunk_blocks() const;

include/Cubed/gameplay/client_entity_manager.hpp

@@ -0,0 +1,77 @@
+#pragma once
+#include "Cubed/gameplay/ecs/entity.hpp"
+#include "glm/ext/vector_float3.hpp"
+#include "world/entity.pb.h"
+
+#include <entt/entt.hpp>
+#include <tbb/concurrent_hash_map.h>
+#include <tbb/concurrent_queue.h>
+namespace Cubed {
+class ClientWorld;
+class ClientEntityManager {
+public:
+    enum class Command { CREATE, DESTORY, UPDATE };
+
+    ClientEntityManager(ClientWorld& world);
+    void update();
+    void init();
+
+    void receive_entity_create(S2CEntityCreate& msg);
+    void receive_entity_destory(EntityID id);
+    void receive_entity_update(S2CEntityUpdate& msg);
+
+    void destory(EntityID id);
+    void create(std::string_view name, const glm::vec3& pos);
+
+    const entt::registry& get_registry() const;
+
+private:
+    struct EntityCreateElement {
+        EntityID id;
+        std::string name;
+        glm::vec3 pos;
+    };
+
+    struct UpdateInfo {
+        EntityID id;
+        glm::vec3 pos;
+        glm::vec3 direction;
+    };
+
+    using EntityMap = tbb::concurrent_hash_map<EntityID, entt::entity>;
+    using acc = EntityMap::accessor;
+    using cacc = EntityMap::const_accessor;
+    using CreateFunc = std::function<void(EntityID id)>;
+    using TaskElement = std::variant<EntityCreateElement, EntityID, UpdateInfo>;
+    using TaskPair = std::pair<Command, TaskElement>;
+
+    ClientWorld& m_world;
+    entt::registry m_registry;
+    EntityMap m_entities;
+    std::unordered_map<std::string_view, CreateFunc> m_factories;
+    tbb::concurrent_queue<TaskPair> m_tasks;
+
+    void handle_task();
+    void handle_entity_destory(EntityID id);
+    // not thread safe
+    void handle_entity_create(EntityID id, std::string_view name,
+                              const glm::vec3& pos);
+    void handle_entity_update(UpdateInfo& info);
+    template <typename... Args>
+    void create_entity_in_registry(EntityID id, Args&&... args) {
+        {
+            cacc a;
+            if (m_entities.find(a, id)) {
+                return;
+            }
+        }
+        auto entity = m_registry.create();
+
+        ((m_registry.emplace<std::remove_cvref_t<Args>>(
+             entity, std::forward<Args>(args))),
+         ...);
+        m_entities.emplace(id, entity);
+        return;
+    }
+};
+} // namespace Cubed

include/Cubed/gameplay/client_player.hpp

@@ -1,167 +1,25 @@
 #pragma once
-#include "Cubed/AABB.hpp"
-#include "Cubed/constants.hpp"
-#include "Cubed/gameplay/block.hpp"
-#include "Cubed/gameplay/chunk_pos.hpp"
-#include "Cubed/gameplay/game_mode.hpp"
-#include "Cubed/gameplay/game_time.hpp"
-#include "Cubed/gameplay/item_stack.hpp"
-#include "Cubed/gameplay/player.hpp"
-#include "Cubed/input/event.hpp"
-#include "Cubed/input/input.hpp"
 
-#include <absl/container/flat_hash_set.h>
-#include <glm/glm.hpp>
-#include <optional>
-#include <shared_mutex>
+#include "Cubed/gameplay/ecs/animation.hpp"
+#include "Cubed/gameplay/ecs/identity.hpp"
+#include "Cubed/gameplay/ecs/transform.hpp"
+#include "Cubed/gameplay/player.hpp"
 namespace Cubed {
 
-class ClientWorld;
-class ClientPlayer {
-public:
-    static constexpr size_t HOTBAR_SUM = 10;
-    static constexpr float WALK_SOUND_INTERVAL = 0.45f;
-    static constexpr float RUN_SOUND_INTERVAL = 0.3f;
-    using ChunkPosSet = absl::flat_hash_set<ChunkPos, ChunkPos::Hash>;
-    ClientPlayer(ClientWorld& world);
-    ~ClientPlayer();
-
-    bool handle_mouse_button_event(const MouseButtonEvent& e);
-    bool handle_key_event(const KeyEvent& e);
-    bool handle_mouse_wheel_event(const MouseWheelEvent& e);
-
-    void update_front_vec(float offset_x, float offset_y);
-    bool update_player_move_state(Key key, KeyAction action);
-    bool update_scroll(float yoffset);
-
-    void update_chunk_set(const ChunkPosSet& set);
-    const ChunkPosSet& get_chunk_pos_set() const;
-    ChunkPosSet get_chunk_pos_set();
-
-    static AABB get_aabb(const glm::vec3& pos);
-    const glm::vec3& get_front() const;
-    Gait get_gait() const;
-    const std::optional<LookBlock>& get_look_block_pos() const;
-    // thread safe
-    glm::vec3 get_player_pos() const;
-    const MoveState& get_move_state() const;
-
-    void change_mode(GameMode mode);
-    void reload_config();
-    void set_player_pos(const glm::vec3& pos);
-    void update(float delta_time);
-
-    float& max_walk_speed();
-    float& max_run_speed();
-    float& max_speed();
-    float& acceleration();
-    float& deceleration();
-    float& g();
-    float& fly_y_speed();
-
-    const ItemStack& get_current_itemstack() const;
-
-    void set_gait(Gait gait);
-    GameMode& game_mode();
-
-    ClientWorld& get_world();
-
-    void set_uuid(std::string_view uuid);
-    std::string get_uuid() const;
-    const std::string& get_name() const;
-    void reset_key_status();
-    void init(std::string_view name);
-
-    float yaw() const;
-    float pitch() const;
-    float& angle();
-    float& walk_time();
-    bool ray_cast(const glm::vec3& start, const glm::vec3& dir,
-                  glm::ivec3& block_pos, glm::vec3& normal,
-                  float distance = 4.0f);
-    bool is_underwater() const;
-    void set_underwater(bool u);
-    void place_block(float dt);
-
-    int selected_hotbar() const;
-    void set_hotbar(int pos, const ItemStack& item);
-    std::span<const ItemStack, HOTBAR_SUM> get_hotbar() const;
-
-private:
-    using enum GameMode;
-    float m_max_walk_speed = DEFAULT_MAX_WALK_SPEED;
-    float m_max_run_speed = DEFAULT_MAX_RUN_SPEED;
-    float m_acceleration = DEFAULT_ACCELERATION;
-    float m_deceleration = DEFAULT_DECELERATION;
-    float m_g = DEFAULT_G;
-    static constexpr float MAX_SPACE_ON_TIME = 0.3f;
-    static constexpr float PLACE_BLOCK_INTERVAL = 0.2f;
-
-    float m_place_time = PLACE_BLOCK_INTERVAL;
-    std::atomic<float> m_yaw = 0.0f;
-    std::atomic<float> m_pitch = 0.0f;
-    std::array<ItemStack, HOTBAR_SUM> m_hotbar;
-    float m_sensitivity = 0.15f;
-
-    float m_max_speed = m_max_walk_speed;
-    float m_y_speed = 0.0f;
-    float m_fly_y_speed = 7.5f;
-    bool can_up = true;
-
-    float space_on_time = 0.0f;
-    bool space_on = false;
-    bool is_fly = false;
-
-    float m_xz_speed = 0.0f;
-
-    int m_selected_hotbar = 0;
-
-    bool m_moving = false;
-    bool m_sprinting = false;
-    bool m_underwater = false;
-
-    glm::vec3 direction = glm::vec3(0.0f, 0.0f, 0.0f);
-    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, 255.0f, 0.0f};
-    ChunkPos m_last_chunk_pos{0, 0};
-
-    glm::vec3 m_front{0, 0, -1};
-    glm::vec3 m_right{0, 0, 0};
-    static constexpr glm::vec3 M_SIZE{0.6f, 1.8f, 0.6f};
-
-    std::atomic<Gait> m_gait = Gait::STOP;
-    MoveState m_move_state{};
-    MouseState m_mouse_state{};
-    GameMode m_game_mode = CREATIVE;
-    std::optional<LookBlock> m_look_block = std::nullopt;
-    std::string m_name{};
-    mutable std::shared_mutex m_uuid_mutex;
-    std::string m_uuid;
-    ClientWorld& m_world;
-
-    float m_angle{0.0f};
-    float m_walk_time{0.0f};
-
-    std::unordered_map<std::string, Timer> m_timers;
-
-    mutable std::shared_mutex m_player_pos_mutex;
-    mutable std::shared_mutex m_chunk_pos_mutex;
-    ChunkPosSet m_player_chunk_pos_set;
-
-    void update_direction();
-    void update_lookup_block();
-
-    void update_move(float delta_time);
-
-    void update_x_move(glm::vec3& player_pos);
-    void update_y_move(glm::vec3& player_pos);
-    void update_z_move(glm::vec3& player_pos);
-
-    void update_player_chunk();
-
-    void play_walk_sound(float dt);
-    Gait compute_gait() const;
+struct ClientPlayer {
+    Position pos{};
+    Position render_pos{};
+    EntityInfo entity{};
+    WalkPose walk{};
+    Orientation angle{};
+    Orientation render_angle{};
 };
-} // namespace Cubed
+
+struct PlayerRenderData {
+    EntityInfo info{};
+    Position render_pos{};
+    Orientation angle{};
+    Gait gait{};
+};
+
+} // namespace Cubed

include/Cubed/gameplay/client_player_manager.hpp

@@ -0,0 +1,45 @@
+#pragma once
+#include "Cubed/gameplay/client_player.hpp"
+#include "Cubed/gameplay/local_player.hpp"
+#include "Cubed/gameplay/network_client.hpp"
+#include "Cubed/tools/sparse_vector.hpp"
+namespace Cubed {
+class ClientWorld;
+class ClientPlayerManager {
+public:
+    ClientPlayerManager(const ClientPlayerManager&) = delete;
+    ClientPlayerManager(ClientPlayerManager&&) = delete;
+    ClientPlayerManager& operator=(const ClientPlayerManager&) = delete;
+    ClientPlayerManager& operator=(ClientPlayerManager&&) = delete;
+    ClientPlayerManager(ClientWorld& world);
+    ~ClientPlayerManager();
+
+    void init(std::string_view local_name);
+    void update(float dt);
+
+    std::span<PlayerRenderData> render_player_data();
+
+    bool has_player(const Hitbox& hitbox) const;
+
+    LocalPlayer& get_local();
+    const LocalPlayer& get_local() const;
+
+    void receive_remote_player(const PlayerInfoRsp& rsp);
+    void receive_player_logout(const LogoutRsp& rsp);
+
+    void reload_config();
+
+    void report_player_info(NetworkClient* client);
+
+private:
+    ClientWorld& m_world;
+    mutable std::shared_mutex m_players_mutex;
+    using PlayerHandle = SparseVector<ClientPlayer>::Handle;
+    SparseVector<ClientPlayer> m_players;
+    std::vector<PlayerRenderData> m_render_data;
+    std::unordered_map<std::string, PlayerHandle> m_players_handle;
+    LocalPlayer m_local;
+
+    void update_players_data(float dt);
+};
+} // namespace Cubed

include/Cubed/gameplay/client_world.hpp

@@ -5,9 +5,12 @@
 #include "Cubed/gameplay/chat_message.hpp"
 #include "Cubed/gameplay/chunk_pos.hpp"
 #include "Cubed/gameplay/client_chunk.hpp"
-#include "Cubed/gameplay/client_player.hpp"
+#include "Cubed/gameplay/client_entity_manager.hpp"
+#include "Cubed/gameplay/client_player_manager.hpp"
 #include "Cubed/gameplay/game_time.hpp"
+#include "Cubed/gameplay/local_player.hpp"
 #include "Cubed/gameplay/network_client.hpp"
+#include "Cubed/gameplay/world.hpp"
 #include "Cubed/input/event.hpp"
 #include "Cubed/tools/cubed_random.hpp"
 #include "Cubed/tools/priority_thread_pool.hpp"
@@ -19,46 +22,26 @@
 #include <tbb/concurrent_unordered_map.h>
 namespace Cubed {
 
-struct PlayerInfo {
-    std::string name;
-    std::string uuid;
-    glm::vec3 render_pos;
-    glm::vec3 target_pos;
-    float render_yaw;
-    float yaw;
-    float render_pitch;
-    float pitch;
-    Gait gait;
-    float angle = 0.0f;
-    float walk_time = 0.0f;
-    float moving_time = 0.0f;
-};
-
-struct PlayerRenderData {
-    std::string name;
-    std::string uuid;
-    glm::vec3 render_pos;
-    float yaw;
-    float pitch;
-    Gait gait;
-    float angle;
-};
 class WorldScene;
-class ClientWorld {
+class ClientWorld : public World {
 public:
+    ClientWorld(const ClientWorld&) = delete;
+    ClientWorld(ClientWorld&&) = delete;
+    ClientWorld& operator=(const ClientWorld&) = delete;
+    ClientWorld& operator=(ClientWorld&&) = delete;
     ClientWorld(AudioEngine& auido, Config& config, WorldScene& scene);
     ~ClientWorld();
     void init(std::string_view player_name,
-              std::shared_ptr<NetworkClient> client);
-    void update(float delta_time);
+              std::shared_ptr<NetworkClient> client, RunMode mode);
+    void update(float dt);
     bool handle_event(const Event& e);
     const std::optional<LookBlock>& get_look_block_pos() const;
-    ClientPlayer& get_player();
-    const ClientPlayer& get_player() const;
-    int get_block(const glm::ivec3& block_pos) const;
-    bool is_solid(const glm::ivec3& block_pos) const;
-    bool can_pass_block(const glm::ivec3& block_pos) const;
-    BlockType get_block_tpye(const glm::ivec3& block_pos) const;
+    LocalPlayer& get_player();
+    const LocalPlayer& get_player() const;
+    int get_block(const glm::ivec3& block_pos) const override;
+    bool is_solid(const glm::ivec3& block_pos) const override;
+    bool can_pass_block(const glm::ivec3& block_pos) const override;
+    BlockType get_block_tpye(const glm::ivec3& block_pos) const override;
 
     void rebuild_world();
 
@@ -71,7 +54,6 @@ public:
     void receive_block_change(const BlockChangeRsp& rsp);
     void receive_time(const UpdateTime& rsp);
 
-    void receive_remote_player(const PlayerInfoRsp& rsp);
     void receive_player_logout(const LogoutRsp& rsp);
     void receive_player_water_sound(const PlayerWaterSound& rsp);
     void send_player_water_sound(bool underwater, const glm::vec3& pos);
@@ -90,8 +72,6 @@ public:
     void reset_key_status();
     std::vector<glm::vec4>& planes();
     const std::vector<const ChunkRenderSnapshot*>& render_snapshots() const;
-    const std::vector<PlayerRenderData>& render_player_data() const;
-    std::vector<PlayerRenderData>& render_player_data();
 
     glm::vec3 sunlight_dir() const;
     bool sphere_collide_world(glm::vec3 center, float radius) const;
@@ -99,23 +79,29 @@ public:
     void request_exit();
     bool is_receive_exit();
     int chunk_size() const;
-    static AABB get_block_aabb(const glm::ivec3& pos);
+
     AudioEngine& get_audio();
     const AudioEngine& get_audio() const;
     Config& get_config();
     WorldScene& world_scene();
+    ClientPlayerManager& player_manager();
+    ClientEntityManager& entity_manager();
+    std::shared_ptr<NetworkClient> get_client() const;
     void set_direct_exit();
 
     void receive_chat_message(ChatMsg& msg);
     void send_chat_message(ChatMessage& message);
     void receive_voice_message(VoiceMsg& msg);
     bool enable_voice_chat() const;
+    int get_per_tick_time() const override;
+
+    bool is_render(const glm::vec3& pos) const;
 
     template <typename Fn>
-    void register_ticktimer(std::string_view id, TickType threshold, Fn&& f) {
-        m_ticktimers.emplace(
-            std::piecewise_construct, std::forward_as_tuple(std::string(id)),
-            std::forward_as_tuple(threshold, std::forward<Fn>(f)));
+    void register_timer(std::string_view id, float threshold, Fn&& f) {
+        m_timers.emplace(std::piecewise_construct,
+                         std::forward_as_tuple(std::string(id)),
+                         std::forward_as_tuple(threshold, std::forward<Fn>(f)));
     }
 
 private:
@@ -136,7 +122,6 @@ private:
                                  ChunkPos::TBBHash>;
     using ChunkPosSet = absl::flat_hash_set<ChunkPos, ChunkPos::Hash>;
     using ChunkPosVector = std::vector<ChunkPos>;
-    using OtherPlayerHashMap = std::unordered_map<std::string, PlayerInfo>;
     using chunk_acc = ChunkHashMap::accessor;
     using chunk_cacc = ChunkHashMap::const_accessor;
 
@@ -147,16 +132,14 @@ private:
 
     static constexpr int WORLD_EXIT_TIMEOUT = 200;
     static constexpr int MAX_UPLOAD_CHUNK_SUM = 16;
-    ClientPlayer m_player;
-    OtherPlayerHashMap m_player_info;
+    std::atomic<RunMode> m_runmode = RunMode::HYBRID;
+    ClientEntityManager m_entity_manager;
+    ClientPlayerManager m_player_manager;
     ChunkHashMap m_chunks;
     AudioEngine& m_audio;
     Config& m_config;
     WorldScene& m_world_scene;
     std::vector<glm::vec4> m_planes;
-    std::jthread m_client_thread;
-
-    mutable std::shared_mutex m_player_info_mutex;
 
     tbb::concurrent_queue<std::unique_ptr<ClientChunk>> m_pending_upload_queue;
     tbb::concurrent_queue<ChunkPos> m_dirty_chunk_queue;
@@ -166,9 +149,7 @@ private:
 
     std::deque<ChunkPos> m_dirty_queue;
     std::vector<const ChunkRenderSnapshot*> m_render_snapshots;
-    std::vector<PlayerRenderData> m_render_player_data;
 
-    tbb::concurrent_unordered_map<std::string, TickTimer> m_ticktimers;
     std::unordered_map<std::string, Timer> m_timers;
     std::atomic<bool> m_exit_direct{false};
     std::atomic<bool> m_game_running{false};
@@ -176,6 +157,7 @@ private:
     std::atomic<int> m_rendering_distance{24};
     std::atomic<TickType> m_game_ticks{0};
     std::atomic<TickType> m_day_tick{6000};
+    std::atomic<int> m_per_tick_time = DEFAULT_PER_TICK_TIME;
     std::atomic<bool> m_requesting_chunk{false};
     std::atomic<bool> m_is_rebuilding{false};
     std::atomic<int> m_chunk_task_id{0};
@@ -187,10 +169,6 @@ private:
 
     Random m_random;
 
-    void client_run(std::stop_token token);
-
-    void report_player_info();
-
     void set_block(const glm::ivec3& pos, unsigned id);
 
     void update_chunk(const ChunkPosSet& old, const ChunkPosSet& now);

include/Cubed/gameplay/creatures/pig.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+namespace Cubed {
+struct PigTag {};
+
+namespace PigDefaults {
+constexpr float MAX_SPEED = 0.1f;     // tiles/tick → 2 tiles/sec
+constexpr float ACCELERATION = 0.01f; // ~10 ticks (0.5s) to reach full speed
+constexpr float DECELERATION = 0.02f; // ~5 ticks (0.25s) to stop
+constexpr float GRAVITY = 1.0f;       // ≈20 tiles/s², close to the player
+} // namespace PigDefaults
+
+} // namespace Cubed

include/Cubed/gameplay/creatures/spawn.hpp

@@ -0,0 +1,20 @@
+#pragma once
+#include "Cubed/gameplay/biome.hpp"
+
+#include <array>
+#include <span>
+#include <string_view>
+namespace Cubed {
+struct SpawnConfig {
+    std::string_view name;             // factory key, e.g. "cubed:pig"
+    std::span<const BiomeType> biomes; // allowed biomes
+    float probability = 0.0f;          // per chunk spawn probability
+    unsigned max_spawn_count = 0;      // per chunk_max_spawn_sum
+};
+
+namespace SpawnDefaults {
+constexpr std::array<BiomeType, 2> PIG_BIOMES{BiomeType::PLAIN,
+                                              BiomeType::FOREST};
+constexpr SpawnConfig PIG{"cubed:pig", PIG_BIOMES, 0.02f, 3};
+} // namespace SpawnDefaults
+} // namespace Cubed

include/Cubed/gameplay/ecs/ai_struct.hpp

@@ -0,0 +1,17 @@
+#pragma once
+
+#include "Cubed/gameplay/game_time.hpp"
+namespace Cubed {
+struct AIBase {
+    TickType interval = 1;
+    TickType count = 0;
+};
+
+struct WanderAITag {};
+
+struct MoveBoost {
+    TickType duration = 0;
+    TickType count = 0;
+};
+
+} // namespace Cubed

include/Cubed/gameplay/ecs/animation.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "Cubed/gameplay/player.hpp"
+namespace Cubed {
+
+struct WalkPose {
+    Gait gait = Gait::STOP;
+    // for arm roll caculate
+    float walk_time = 0.0f;
+    // for sound play
+    float moving_time = 0.0f;
+};
+
+} // namespace Cubed

include/Cubed/gameplay/ecs/client_entity.hpp

@@ -0,0 +1,14 @@
+#pragma once
+#include "Cubed/gameplay/ecs/animation.hpp"
+#include "Cubed/gameplay/ecs/transform.hpp"
+#include "Cubed/gameplay/model.hpp"
+namespace Cubed {
+struct BaseClientCreature {
+
+    Transform transform;
+
+    WalkPose pose;
+
+    ModelID model;
+};
+} // namespace Cubed

include/Cubed/gameplay/ecs/entity.hpp

@@ -0,0 +1,11 @@
+#pragma once
+#include <cstdint>
+namespace Cubed {
+using EntityID = uint64_t;
+
+struct Entity {
+    EntityID id;
+    explicit Entity(EntityID id) : id(id) {}
+};
+
+} // namespace Cubed

include/Cubed/gameplay/ecs/health.hpp

@@ -0,0 +1,10 @@
+#pragma once
+
+namespace Cubed {
+
+struct Health {
+    float hp = 20;
+    float max_hp = 20;
+};
+
+} // namespace Cubed

include/Cubed/gameplay/ecs/identity.hpp

@@ -0,0 +1,10 @@
+#pragma once
+
+#include <string>
+
+namespace Cubed {
+struct EntityInfo {
+    std::string name;
+    std::string uuid;
+};
+} // namespace Cubed

include/Cubed/gameplay/ecs/movement.hpp

@@ -0,0 +1,34 @@
+#pragma once
+#include "Cubed/constants.hpp"
+
+#include <glm/glm.hpp>
+namespace Cubed {
+struct TickVelocity {
+
+    glm::vec3 value{0.0f};
+    // blocks/tick!!! -1 for in
+    glm::vec3 max{1.0f, -1.0f, 1.0f};
+};
+
+struct Velocity {
+
+    glm::vec3 value{0.0f};
+    // blocks/second!!!
+    glm::vec3 max{4.5f, 7.5f, 7.5f};
+};
+
+struct Movement {
+
+    float acceleration = DEFAULT_ACCELERATION;
+
+    float deceleration = DEFAULT_DECELERATION;
+
+    float jump_power = 7.5f;
+};
+
+struct Gravity {
+
+    float value = DEFAULT_G;
+};
+
+} // namespace Cubed

include/Cubed/gameplay/ecs/server_entity.hpp

@@ -0,0 +1,22 @@
+#pragma once
+#include "Cubed/gameplay/ecs/health.hpp"
+#include "Cubed/gameplay/ecs/movement.hpp"
+#include "Cubed/gameplay/ecs/transform.hpp"
+#include "Cubed/gameplay/hitbox.hpp"
+namespace Cubed {
+
+struct BaseServerCreature {
+    Transform transform{};
+
+    TickVelocity velocity{};
+
+    Movement movement{};
+
+    Gravity gravity{};
+
+    Health health{};
+
+    HitboxID hitbox{};
+};
+
+} // namespace Cubed

include/Cubed/gameplay/ecs/state.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+namespace Cubed {
+struct MoveState {
+
+    bool forward = false;
+    bool back = false;
+    bool left = false;
+    bool right = false;
+
+    bool down = false;
+    bool up = false;
+
+    bool is_fly = false;
+    bool can_up = true;
+};
+
+} // namespace Cubed

include/Cubed/gameplay/ecs/transform.hpp

@@ -0,0 +1,30 @@
+#pragma once
+#include <glm/glm.hpp>
+namespace Cubed {
+struct Position {
+    glm::vec3 value{0.0f};
+};
+
+struct Orientation {
+    float yaw = 0.0f;
+    float pitch = 0.0f;
+    float roll = 0.0f;
+};
+
+struct Direction {
+    glm::vec3 value{0.0f};
+};
+
+struct Transform {
+    Position position{};
+    Orientation orientation{};
+    Direction direction{};
+};
+
+struct RenderTransform {
+    Position position{};
+    Orientation orientation{};
+    Direction direction{};
+};
+
+} // namespace Cubed

include/Cubed/gameplay/hitbox.hpp

@@ -0,0 +1,26 @@
+#pragma once
+#include <glm/glm.hpp>
+
+namespace Cubed {
+
+using HitboxID = uint32_t;
+
+struct Hitbox {
+    glm::vec3 center{0.0f};
+    glm::vec3 half{0.0f};
+
+    Hitbox(glm::vec3 center_point, glm::vec3 half_size)
+        : center(center_point), half(half_size) {}
+
+    glm::vec3 min() const { return center - half; }
+
+    glm::vec3 max() const { return center + half; }
+
+    bool intersects(const Hitbox& other) const {
+        return (glm::abs(center.x - other.center.x) <= half.x + other.half.x) &&
+               (glm::abs(center.y - other.center.y) <= half.y + other.half.y) &&
+               (glm::abs(center.z - other.center.z) <= half.z + other.half.z);
+    }
+};
+
+} // namespace Cubed

include/Cubed/gameplay/hitbox_manager.hpp

@@ -0,0 +1,37 @@
+#pragma once
+#include "Cubed/gameplay/hitbox.hpp"
+
+#include <tbb/concurrent_hash_map.h>
+namespace Cubed {
+class HitboxManager {
+public:
+    struct Handle {
+        Hitbox box;
+        HitboxID id = 0;
+    };
+    HitboxManager();
+    ~HitboxManager();
+    static HitboxManager& instance();
+
+    [[nodiscard]]
+    Handle get_hitbox(const std::string& key);
+    [[nodiscard]]
+    Handle get_hitbox(HitboxID id);
+    [[nodiscard]]
+    static Handle hitbox(const std::string& name);
+    [[nodiscard]]
+    static Handle hitbox(HitboxID id);
+    HitboxID get_hitbox_id(const std::string& name);
+    const std::string& get_hitbox_name(HitboxID id);
+
+private:
+    using HitboxMap = tbb::concurrent_hash_map<HitboxID, Hitbox>;
+    using IDMap = tbb::concurrent_hash_map<std::string, HitboxID>;
+    using NameMap = tbb::concurrent_hash_map<HitboxID, std::string>;
+    HitboxID m_next = 0;
+    IDMap m_id_map;
+    NameMap m_name_map;
+    HitboxMap m_hitboxes;
+    Handle load(std::string_view name);
+};
+} // namespace Cubed

include/Cubed/gameplay/item.hpp

@@ -0,0 +1,39 @@
+#pragma once
+#include "Cubed/gameplay/block.hpp"
+
+#include <cstdint>
+#include <string>
+#include <variant>
+namespace Cubed {
+using ItemID = uint16_t;
+
+enum class ItemKind {
+    NONE,
+    BLOCK,
+    SPAWN_EGG
+
+};
+
+using ItemProperty = std::variant<BlockType, std::string>;
+
+struct ItemData {
+    ItemID id = 0;
+    std::string name;
+    std::string local_name;
+    std::string description;
+    std::string path;
+    ItemKind kind = ItemKind::NONE;
+    ItemProperty property;
+};
+
+inline constexpr ItemKind get_item_kind(std::string_view kind) {
+    if (kind == "block") {
+        return ItemKind::BLOCK;
+    }
+    if (kind == "spawn_egg") {
+        return ItemKind::SPAWN_EGG;
+    }
+    return ItemKind::NONE;
+}
+
+} // namespace Cubed

include/Cubed/gameplay/item_manager.hpp

@@ -0,0 +1,39 @@
+#pragma once
+
+#include "Cubed/gameplay/item.hpp"
+
+#include <filesystem>
+#include <string_view>
+#include <tbb/concurrent_hash_map.h>
+namespace Cubed {
+class ItemManager {
+public:
+    ItemManager();
+    void init();
+    static ItemManager& instance();
+
+    static const ItemData& get(std::string_view key);
+    static const ItemData& get(ItemID id);
+
+    static ItemID size();
+
+    const ItemData& get_item_data(std::string_view key) const;
+    const ItemData& get_item_data(ItemID id) const;
+
+private:
+    using ItemMap = tbb::concurrent_hash_map<ItemID, ItemData>;
+    using acc = ItemMap::accessor;
+    using cacc = ItemMap::const_accessor;
+
+    using IDMap = tbb::concurrent_hash_map<std::string, ItemID>;
+    using BlockToIDMap = tbb::concurrent_hash_map<BlockType, ItemID>;
+    void add(const std::filesystem::path& path);
+
+    ItemMap m_map;
+
+    IDMap m_id_map;
+    BlockToIDMap m_block_to_id_map;
+
+    static inline const ItemData EMPTY;
+};
+} // namespace Cubed

include/Cubed/gameplay/item_stack.hpp

@@ -1,8 +1,9 @@
 #pragma once
-#include "Cubed/gameplay/block.hpp"
+#include "Cubed/gameplay/item.hpp"
 namespace Cubed {
+
 struct ItemStack {
-    BlockType type = 0;
+    ItemID id = 0;
     size_t sum = 0;
 };
 } // namespace Cubed

include/Cubed/gameplay/local_player.hpp

@@ -0,0 +1,162 @@
+#pragma once
+#include "Cubed/constants.hpp"
+#include "Cubed/gameplay/block.hpp"
+#include "Cubed/gameplay/chunk_pos.hpp"
+#include "Cubed/gameplay/ecs/animation.hpp"
+#include "Cubed/gameplay/ecs/identity.hpp"
+#include "Cubed/gameplay/ecs/movement.hpp"
+#include "Cubed/gameplay/ecs/state.hpp"
+#include "Cubed/gameplay/ecs/transform.hpp"
+#include "Cubed/gameplay/game_mode.hpp"
+#include "Cubed/gameplay/game_time.hpp"
+#include "Cubed/gameplay/hitbox.hpp"
+#include "Cubed/gameplay/item_stack.hpp"
+#include "Cubed/gameplay/player.hpp"
+#include "Cubed/input/event.hpp"
+#include "Cubed/input/input.hpp"
+
+#include <absl/container/flat_hash_set.h>
+#include <glm/glm.hpp>
+#include <optional>
+#include <shared_mutex>
+namespace Cubed {
+
+class ClientWorld;
+class LocalPlayer {
+public:
+    static constexpr size_t HOTBAR_SUM = 10;
+    static constexpr float WALK_SOUND_INTERVAL = 0.45f;
+    static constexpr float RUN_SOUND_INTERVAL = 0.3f;
+    using ChunkPosSet = absl::flat_hash_set<ChunkPos, ChunkPos::Hash>;
+    LocalPlayer(ClientWorld& world);
+    ~LocalPlayer();
+
+    bool handle_mouse_button_event(const MouseButtonEvent& e);
+    bool handle_key_event(const KeyEvent& e);
+    bool handle_mouse_wheel_event(const MouseWheelEvent& e);
+
+    void update_front_vec(float offset_x, float offset_y);
+    bool update_player_move_state(Key key, KeyAction action);
+    bool update_scroll(float yoffset);
+
+    void update_chunk_set(const ChunkPosSet& set);
+
+    const ChunkPosSet& get_chunk_pos_set() const;
+    ChunkPosSet get_chunk_pos_set();
+
+    const glm::vec3& get_front() const;
+
+    const std::optional<LookBlock>& get_look_block_pos() const;
+    // thread safe
+    glm::vec3 get_player_pos() const;
+    const MoveState& get_move_state() const;
+
+    void change_mode(GameMode mode);
+    void reload_config();
+    void set_player_pos(const glm::vec3& pos);
+    void update(float delta_time);
+
+    float& max_walk_speed();
+    float& max_run_speed();
+    float& fly_y_speed();
+
+    const ItemStack& get_current_itemstack() const;
+
+    GameMode& game_mode();
+
+    ClientWorld& get_world();
+
+    void set_uuid(std::string_view uuid);
+    std::string get_uuid() const;
+    const std::string& get_name() const;
+    void reset_input_status();
+    void init(std::string_view name);
+
+    bool ray_cast(const glm::vec3& start, const glm::vec3& dir,
+                  glm::ivec3& block_pos, glm::vec3& normal,
+                  float distance = 4.0f);
+    bool is_underwater() const;
+    void set_underwater(bool u);
+    void place_block(float dt);
+
+    int selected_hotbar() const;
+    void set_hotbar(int pos, const ItemStack& item);
+    std::span<const ItemStack, HOTBAR_SUM> get_hotbar() const;
+
+    glm::vec3& max_speed();
+    float& acceleration();
+    float& deceleration();
+    float& g();
+    void set_gait(Gait gait);
+    float yaw() const;
+    float pitch() const;
+    float& roll();
+    float& walk_time();
+    Gait get_gait() const;
+
+private:
+    using enum GameMode;
+    float m_max_walk_speed = DEFAULT_MAX_WALK_SPEED;
+    float m_max_run_speed = DEFAULT_MAX_RUN_SPEED;
+    float m_max_y_speed = 7.5f;
+    static constexpr float MAX_SPACE_ON_TIME = 0.3f;
+    static constexpr float PLACE_BLOCK_INTERVAL = 0.2f;
+
+    EntityInfo m_info;
+    Position m_pos;
+    WalkPose m_walk_pose;
+    Velocity m_velocity;
+    Orientation m_angle;
+    Movement m_movement;
+    Gravity m_gravity;
+    MoveState m_move_state;
+    Direction m_direction;
+    HitboxID m_hitbox = 0;
+
+    float m_place_time = PLACE_BLOCK_INTERVAL;
+
+    std::array<ItemStack, HOTBAR_SUM> m_hotbar;
+    float m_sensitivity = 0.15f;
+
+    float space_on_time = 0.0f;
+    bool space_on = false;
+
+    int m_selected_hotbar = 0;
+
+    bool m_moving = false;
+    bool m_sprinting = false;
+    bool m_underwater = false;
+
+    // player is tow block tall, the pos is the lower pos
+    ChunkPos m_last_chunk_pos{0, 0};
+
+    glm::vec3 m_front{0, 0, -1};
+    glm::vec3 m_right{0, 0, 0};
+
+    MouseState m_mouse_state{};
+    GameMode m_game_mode = CREATIVE;
+    std::optional<LookBlock> m_look_block = std::nullopt;
+    std::string m_name{};
+    mutable std::shared_mutex m_uuid_mutex;
+    std::string m_uuid;
+    ClientWorld& m_world;
+
+    std::unordered_map<std::string, Timer> m_timers;
+
+    mutable std::shared_mutex m_player_pos_mutex;
+    mutable std::shared_mutex m_chunk_pos_mutex;
+    ChunkPosSet m_player_chunk_pos_set;
+
+    void update_direction();
+    void update_lookup_block();
+    void update_move(float dt);
+    void update_player_chunk();
+
+    void play_walk_sound(float dt);
+    Gait compute_gait() const;
+
+    void update_speed(float dt);
+    std::tuple<bool, bool, bool> update_physical(float dt, glm::vec3& pos);
+    glm::vec3 get_move_distance(float dt);
+};
+} // namespace Cubed

include/Cubed/gameplay/model.hpp

@@ -0,0 +1,7 @@
+#pragma once
+#include <cstdint>
+
+using ModelID = uint32_t;
+struct Model {
+    ModelID id;
+};

include/Cubed/gameplay/network_server.hpp

@@ -14,8 +14,7 @@ public:
     void stop();
 
     // Run in another thread after initialization is complete
-    void start_server(int port);
-    void start_server();
+    void start_server(int port, RunMode mode);
     int port() const;
     ServerWorld& server_world();
 

include/Cubed/gameplay/packet.hpp

@@ -51,18 +51,27 @@ enum class PacketEnum : uint16_t {
     LOGIN_RSP = 1002,
     LOGOUT_REQ = 1003,
     LOGOUT_RSP = 1004,
+
     PLAYER_INFO = 2001,
     C2S_PLAYER_INFO = 2002,
     PLAYER_INFO_RSP = 2003,
     PLAYER_WATER_SOUND = 2004,
+
     CHUNK_DATA_REQ = 3001,
     CHUNK_DATA_RSP = 3002,
     BLOCK_CHANGE_REQ = 3003,
     BLOCK_CHANGE_RSP = 3004,
     S2C_CLEAR_ALL_CHUNKS = 3005,
     UPDATE_TIME = 3006,
+    S2C_ENTITY_CREATE = 3007,
+    S2C_ENTITY_DESTORY = 3008,
+    C2S_ENTITY_CREATE_REQUEST = 3009,
+    C2S_ENTITY_DESTORY_REQUEST = 3010,
+    S2C_ENTITY_UPDATE = 3011,
+
     CHAT_MSG = 4001,
     VOICE_MSG = 4002,
+
     PING = 9001,
     PONG = 9002
 
@@ -111,6 +120,18 @@ template <> constexpr uint16_t get_packet_id<BlockChangeRsp>() {
 template <> constexpr uint16_t get_packet_id<S2C_ClearAllChunks>() {
     return std::to_underlying(PacketEnum::S2C_CLEAR_ALL_CHUNKS);
 }
+template <> constexpr uint16_t get_packet_id<S2CEntityCreate>() {
+    return std::to_underlying(PacketEnum::S2C_ENTITY_CREATE);
+}
+template <> constexpr uint16_t get_packet_id<S2CEntityDestory>() {
+    return std::to_underlying(PacketEnum::S2C_ENTITY_DESTORY);
+}
+template <> constexpr uint16_t get_packet_id<C2SEntityCreateRequest>() {
+    return std::to_underlying(PacketEnum::C2S_ENTITY_CREATE_REQUEST);
+}
+template <> constexpr uint16_t get_packet_id<C2SEntityDestoryRequest>() {
+    return std::to_underlying(PacketEnum::C2S_ENTITY_DESTORY_REQUEST);
+}
 template <> constexpr uint16_t get_packet_id<UpdateTime>() {
     return std::to_underlying(PacketEnum::UPDATE_TIME);
 }
@@ -129,6 +150,9 @@ template <> constexpr uint16_t get_packet_id<ChatMsg>() {
 template <> constexpr uint16_t get_packet_id<VoiceMsg>() {
     return std::to_underlying(PacketEnum::VOICE_MSG);
 }
+template <> constexpr uint16_t get_packet_id<S2CEntityUpdate>() {
+    return std::to_underlying(PacketEnum::S2C_ENTITY_UPDATE);
+}
 
 template <typename T>
     requires std::derived_from<T, google::protobuf::Message>
@@ -180,6 +204,12 @@ Packet make_packet(const T& msg) {
     return packet;
 }
 
+template <typename T>
+    requires std::derived_from<T, google::protobuf::Message>
+Packet make_packet(const T* msg) {
+    return make_packet(*msg);
+}
+
 inline PacketHeader decode_packet_header(std::span<const uint8_t> header) {
     if (header.size() < HEADER_LEN)
         throw std::runtime_error("Invalid header");

include/Cubed/gameplay/player.hpp

@@ -1,4 +1,6 @@
 #pragma once
+#include "glm/ext/vector_float3.hpp"
+
 #include <stdexcept>
 #include <utility>
 namespace Cubed {
@@ -17,5 +19,5 @@ inline Gait get_gait_from_id(int id) {
         throw std::runtime_error("Unknown Gait");
     }
 }
-
+static constexpr glm::vec3 PLAYER_SIZE{0.6f, 1.8f, 0.6f};
 } // namespace Cubed

include/Cubed/gameplay/server_chunk.hpp

@@ -2,6 +2,7 @@
 #include "Cubed/constants.hpp"
 #include "Cubed/gameplay/biome.hpp"
 #include "Cubed/gameplay/block.hpp"
+#include "Cubed/gameplay/chunk.hpp"
 #include "Cubed/gameplay/chunk_generator.hpp"
 #include "Cubed/gameplay/chunk_pos.hpp"
 
@@ -11,7 +12,7 @@
 #include <tuple>
 namespace Cubed {
 class ServerWorld;
-class ServerChunk {
+class ServerChunk : public Chunk {
 public:
     ServerChunk(ServerWorld& world, ChunkPos chunk_pos,
                 bool temp_chunk = false);

include/Cubed/gameplay/server_entity_manager.hpp

@@ -0,0 +1,65 @@
+#pragma once
+#include "Cubed/gameplay/ecs/entity.hpp"
+#include "glm/ext/vector_float3.hpp"
+
+#include <entt/entt.hpp>
+#include <tbb/concurrent_hash_map.h>
+#include <tbb/concurrent_queue.h>
+#include <tbb/concurrent_vector.h>
+namespace Cubed {
+class ServerWorld;
+class Session;
+class ServerEntityManager {
+public:
+    ServerEntityManager(ServerWorld& world);
+
+    void init();
+    void update();
+    // not thread safe
+    void add_entity(std::string_view name, const glm::vec3& world_pos);
+    void destory(EntityID id);
+    void handle_player_login(std::shared_ptr<Session> session);
+
+private:
+    enum class Command { CREATE, SEND_ALL_ENTITIES, DESTORY };
+    struct EntityCreateElement {
+        std::string name;
+        glm::vec3 pos;
+    };
+    using EntityMap = tbb::concurrent_hash_map<EntityID, entt::entity>;
+    using acc = EntityMap::accessor;
+    using cacc = EntityMap::const_accessor;
+    using CreateFunc = std::function<EntityID()>;
+    using TaskElement =
+        std::variant<std::shared_ptr<Session>, EntityCreateElement, EntityID>;
+    using TaskPair = std::pair<Command, TaskElement>;
+    ServerWorld& m_world;
+    tbb::concurrent_queue<TaskPair> m_tasks;
+    entt::registry m_registry;
+    EntityID m_next = 0;
+    EntityMap m_entities;
+    std::unordered_map<std::string_view, CreateFunc> m_factories;
+    void create_entity(std::string_view name, const glm::vec3& pos);
+    void handle_entity_create(EntityID id, std::string_view name,
+                              const glm::vec3& pos);
+    void handle_entity_destory(EntityID id);
+    void handle_task();
+    void send_all_entities(std::shared_ptr<Session>& session);
+    void update_ai(entt::entity e);
+    void update_move(entt::entity e);
+    void
+    update_send(entt::entity e,
+                tbb::concurrent_vector<std::shared_ptr<Session>>& sessions);
+    template <typename... Args>
+    EntityID create_entity_in_factory(Args&&... args) {
+        auto entity = m_registry.create();
+
+        ((m_registry.emplace<std::remove_cvref_t<Args>>(
+             entity, std::forward<Args>(args))),
+         ...);
+        auto id = m_next++;
+        m_entities.emplace(id, entity);
+        return id;
+    }
+};
+} // namespace Cubed

include/Cubed/gameplay/server_world.hpp

@@ -7,7 +7,9 @@
 #include "Cubed/gameplay/packet.hpp" // IWYU pragma: keep
 #include "Cubed/gameplay/river_worm.hpp"
 #include "Cubed/gameplay/server_chunk.hpp"
+#include "Cubed/gameplay/server_entity_manager.hpp"
 #include "Cubed/gameplay/server_player.hpp"
+#include "Cubed/gameplay/world.hpp"
 #include "Cubed/tools/priority_thread_pool.hpp"
 #include "Cubed/tools/recent_queue.hpp"
 #include "Cubed/tools/sensitive_filter.hpp"
@@ -20,19 +22,20 @@
 #include <tbb/concurrent_hash_map.h>
 #include <tbb/concurrent_queue.h>
 #include <tbb/concurrent_unordered_map.h>
+#include <tbb/concurrent_vector.h>
 #include <unordered_map>
 #include <utility>
 #include <vector>
 namespace Cubed {
 class Session;
-class ServerWorld {
+class ServerWorld : public World {
 public:
     enum class ThreadPoolKind { NET, GEN };
     ServerWorld(Config& config);
     ~ServerWorld();
     void stop();
     void handle_player_exit(const std::string& uuid);
-    void init_world();
+    void init_world(RunMode mode);
     void need_gen(std::string uuid);
     void update();
     void hot_reload();
@@ -84,7 +87,22 @@ public:
 
     void handle_chat_message(ChatMsg& msg);
     void handle_voice_message(VoiceMsg& msg);
+
+    void handle_entity_create(C2SEntityCreateRequest& req);
+    void handle_entity_destory(C2SEntityDestoryRequest& req);
+
     int chunk_size() const;
+
+    tbb::concurrent_vector<std::shared_ptr<Session>> get_all_session() const;
+
+    uint32_t get_chunk_ref_count(const glm::vec3& pos) const;
+    ServerEntityManager& entity_manager();
+    std::shared_ptr<ThreadPool> get_compute_pool();
+    int get_block(const glm::ivec3& block_pos) const override;
+    bool is_solid(const glm::ivec3& block_pos) const override;
+    bool can_pass_block(const glm::ivec3& block_pos) const override;
+    BlockType get_block_tpye(const glm::ivec3& block_pos) const override;
+    int get_per_tick_time() const override;
     template <typename Fn>
     void register_timer(std::string_view id, TickType threshold, Fn&& f) {
         m_timers.emplace(std::piecewise_construct,
@@ -97,7 +115,27 @@ private:
     struct ChunkEntity {
         ChunkState state;
         std::shared_ptr<ServerChunk> chunk;
-        uint32_t ref_count = 0;
+        std::atomic<uint32_t> ref_count = 0;
+        ChunkEntity() = default;
+        ChunkEntity(ChunkState s, std::shared_ptr<ServerChunk> c = {})
+            : state(s), chunk(std::move(c)) {}
+
+        ChunkEntity& operator=(ChunkEntity&& o) noexcept {
+            if (this == &o) {
+                return *this;
+            }
+
+            state = std::exchange(o.state, ServerWorld::ChunkState::NONE);
+            chunk = std::move(o.chunk);
+            ref_count = o.ref_count.exchange(0);
+            return *this;
+        }
+
+        ChunkEntity(ChunkEntity&& o) noexcept
+            : state(std::exchange(o.state, ServerWorld::ChunkState::NONE)),
+              chunk(std::move(o.chunk)), ref_count(o.ref_count.exchange(0)) {}
+        ChunkEntity(const ChunkEntity&) = delete;
+        ChunkEntity& operator=(const ChunkEntity&) = delete;
     };
 
     enum class ChunkLoadStyle { RANDOM, CENTER };
@@ -119,13 +157,14 @@ private:
     using PlayerUUIDMap = tbb::concurrent_hash_map<std::string, std::string>;
 
     using chunk_acc = ChunkHashMap::accessor;
-    using chunk_caac = ChunkHashMap::const_accessor;
+    using chunk_cacc = ChunkHashMap::const_accessor;
 
     using uuid_acc = PlayerUUIDMap::accessor;
     using uuid_cacc = PlayerUUIDMap::const_accessor;
 
     Config& m_config;
-
+    std::atomic<RunMode> m_runmode{RunMode::HYBRID};
+    ServerEntityManager m_entity_manager;
     // key = uuid
     PlayerHashMap m_players;
     ChunkHashMap m_chunks;
@@ -146,8 +185,9 @@ private:
     std::atomic<bool> m_init{false};
     std::atomic<bool> m_stopped{false};
     std::atomic<int> m_rendering_distance{24};
-    std::atomic<int> m_gen_pool_threads{0};
-    std::atomic<int> m_net_pool_threads{0};
+    std::atomic<int> m_gen_threads{0};
+    std::atomic<int> m_net_threads{0};
+    std::atomic<int> m_compute_threads{0};
     std::atomic<int> m_max_threads{1};
     std::atomic<size_t> m_player_sum{0};
     std::atomic<TickType> m_game_ticks{0};
@@ -155,7 +195,7 @@ private:
     std::atomic<bool> m_tick_running{true};
     std::atomic<int> m_per_tick_time = DEFAULT_PER_TICK_TIME; // ms
 
-    mutable std::shared_mutex m_player_mutex;
+    mutable std::shared_mutex m_players_mutex;
     std::mutex m_need_gen_queue_mutex;
     std::condition_variable_any m_gen_cv;
 
@@ -163,6 +203,7 @@ private:
 
     std::atomic<std::shared_ptr<PriorityThreadPool>> m_gen_thread_pool;
     std::atomic<std::shared_ptr<ThreadPool>> m_net_thread_pool;
+    std::atomic<std::shared_ptr<ThreadPool>> m_compute_thread_pool;
 
     std::atomic<ChunkLoadStyle> m_chunk_load_style{ChunkLoadStyle::CENTER};
 

include/Cubed/gameplay/systems/physical_system.hpp

@@ -0,0 +1,16 @@
+#pragma once
+#include "Cubed/gameplay/ecs/movement.hpp"
+
+#include <entt/entt.hpp>
+namespace Cubed {
+class ServerWorld;
+class PhysicalSystem {
+public:
+    static glm::vec3 get_move_distance(const TickVelocity& v);
+
+    static void update(ServerWorld& world, entt::registry& registry,
+                       entt::entity e);
+
+private:
+};
+} // namespace Cubed

include/Cubed/gameplay/systems/speed_system.hpp

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <entt/entt.hpp>
+namespace Cubed {
+class SpeedSystem {
+public:
+    static void update(float dt, entt::registry& registry, entt::entity e);
+
+private:
+};
+} // namespace Cubed

include/Cubed/gameplay/systems/wander_ai_system.hpp

@@ -0,0 +1,14 @@
+#pragma once
+#include "Cubed/gameplay/ecs/ai_struct.hpp"
+#include "Cubed/gameplay/ecs/server_entity.hpp"
+
+#include <entt/entt.hpp>
+namespace Cubed {
+class WanderAISystem {
+public:
+    static void update(entt::registry& registry, entt::entity e);
+
+private:
+    static void do_ai(BaseServerCreature& creature, MoveBoost& move_boost);
+};
+} // namespace Cubed

include/Cubed/gameplay/world.hpp

@@ -0,0 +1,32 @@
+#pragma once
+#include "Cubed/gameplay/block.hpp"
+#include "Cubed/gameplay/hitbox.hpp"
+
+#include <glm/glm.hpp>
+namespace Cubed {
+class World {
+public:
+    World() = default;
+    World(const World&) = delete;
+    World(World&&) = delete;
+    World& operator=(const World&) = delete;
+    World& operator=(World&&) = delete;
+    virtual ~World() = default;
+
+    virtual int get_block(const glm::ivec3& block_pos) const = 0;
+    virtual bool is_solid(const glm::ivec3& block_pos) const = 0;
+    virtual bool can_pass_block(const glm::ivec3& block_pos) const = 0;
+    virtual BlockType get_block_tpye(const glm::ivec3& block_pos) const = 0;
+    virtual int get_per_tick_time() const = 0;
+
+    static Hitbox get_block_aabb(const glm::ivec3& pos) {
+        return {glm::vec3{static_cast<float>(pos.x) + 0.5f,
+                          static_cast<float>(pos.y) + 0.5f,
+                          static_cast<float>(pos.z) + 0.5f},
+                glm::vec3{0.5f, 0.5f, 0.5f}};
+    }
+};
+
+enum class RunMode { CLIENT_ONLY, SERVER_ONLY, HYBRID };
+
+} // namespace Cubed

include/Cubed/input/input.hpp

@@ -2,15 +2,6 @@
 
 namespace Cubed {
 
-struct MoveState {
-    bool forward = false;
-    bool back = false;
-    bool left = false;
-    bool right = false;
-    bool down = false;
-    bool up = false;
-};
-
 struct MouseState {
     bool left = false;
     bool right = false;

include/Cubed/render/model_manager.hpp

@@ -0,0 +1,45 @@
+#pragma once
+#include "Cubed/gameplay/model.hpp"
+#include "Cubed/render/model_node.hpp"
+#include "Cubed/tools/model_loader.hpp"
+
+#include <tbb/concurrent_hash_map.h>
+namespace Cubed {
+class ModelManager {
+public:
+    struct Handle {
+        const ModelNode& node;
+        ModelID id = 0;
+    };
+
+    ModelManager();
+    ModelManager(const ModelManager&) = delete;
+    ModelManager(ModelManager&&) = delete;
+    ModelManager& operator=(const ModelManager&) = delete;
+    ModelManager& operator=(ModelManager&&) = delete;
+    static ModelManager& instance();
+    ~ModelManager();
+    [[nodiscard]]
+    Handle get_model(const std::string& model_name);
+    [[nodiscard]]
+    Handle get_model(ModelID id);
+    [[nodiscard]]
+    static Handle model(const std::string& model_name);
+    [[nodiscard]]
+    static Handle model(ModelID id);
+    ModelID get_model_id(const std::string& name);
+    const std::string& get_model_name(ModelID id);
+    void init();
+
+private:
+    ModelLoader m_loader;
+    ModelID m_next = 0;
+    using ModelMap = tbb::concurrent_hash_map<ModelID, ModelNode>;
+    using IDMap = tbb::concurrent_hash_map<std::string, ModelID>;
+    using NameMap = tbb::concurrent_hash_map<ModelID, std::string>;
+    ModelMap m_models;
+    IDMap m_id_map;
+    NameMap m_name_map;
+    Handle load_model(std::string_view model_name);
+};
+} // namespace Cubed

include/Cubed/render/model_node.hpp

@@ -0,0 +1,42 @@
+#pragma once
+
+#include "Cubed/primitive_data.hpp"
+#include "Cubed/render/texture.hpp"
+#include "Cubed/render/vertex_array.hpp"
+#include "Cubed/render/vertex_buffer.hpp"
+
+#include <glad/glad.h>
+#include <glm/glm.hpp>
+#include <memory>
+#include <string>
+namespace Cubed {
+
+struct Mesh {
+    std::vector<Vertex3D> vertices;
+    std::vector<uint32_t> indices;
+    std::unique_ptr<VertexBuffer> vbo;
+    std::unique_ptr<VertexBuffer> ebo;
+    std::unique_ptr<VertexArray> vao;
+    std::unique_ptr<Texture> texture;
+    void upload() {
+        vao = std::make_unique<VertexArray>();
+        vao->bind();
+        vbo = std::make_unique<VertexBuffer>();
+        vbo->buffer_data(vertices.data(), vertices.size() * sizeof(Vertex3D));
+        ebo = std::make_unique<VertexBuffer>(BufferType::ELEMENT_ARRAY_BUFFER);
+        ebo->buffer_data(indices.data(), indices.size() * sizeof(uint32_t));
+        vao->attribute(0, 3, GL_FLOAT, sizeof(Vertex3D), (void*)0);
+        vao->attribute(1, 2, GL_FLOAT, sizeof(Vertex3D),
+                       (void*)offsetof(Vertex3D, s));
+        vao->attribute(2, 3, GL_FLOAT, sizeof(Vertex3D),
+                       (void*)offsetof(Vertex3D, nx));
+    };
+};
+struct ModelNode {
+    std::string name;
+    glm::mat4 transform{1.0f};
+    std::vector<Mesh> meshes;
+    std::vector<ModelNode> children;
+};
+
+} // namespace Cubed

include/Cubed/render/model_renderer.hpp

@@ -0,0 +1,26 @@
+#pragma once
+
+#include "Cubed/gameplay/model.hpp"
+#include "Cubed/render/model_node.hpp"
+#include "Cubed/shader.hpp"
+
+#include <glm/glm.hpp>
+namespace Cubed {
+class Renderer;
+class Camera;
+class ModelRender {
+public:
+    ModelRender(Renderer& renderer);
+    void render_model(ModelID id, const glm::vec3& pos, float yaw,
+                      Camera& camera);
+
+    void shadow_pass(ModelID id, const glm::vec3& pos, float yaw,
+                     Camera& camera);
+
+private:
+    Renderer& m_renderer;
+    void render_node(const ModelNode& node, const glm::mat4& parent,
+                     const glm::mat4& view, const Shader& shader, bool shadow);
+    void render_mesh(const Mesh& mesh, bool shadow);
+};
+} // namespace Cubed

include/Cubed/render/player_renderer.hpp

@@ -13,9 +13,7 @@ public:
     PlayerRenderer(Renderer& renderer);
     ~PlayerRenderer();
     void init();
-    void render(const Shader& shader, ClientWorld& world);
-    void shadow_render(const Shader& shader, glm::mat4& light_matrix,
-                       ClientWorld& world);
+    void render(const Shader& shader, ClientWorld& world, bool shadow_render);
 
 private:
     struct PlayerVertex {

include/Cubed/render/renderer.hpp

@@ -4,6 +4,7 @@
 #include "Cubed/constants.hpp"
 #include "Cubed/input/event.hpp"
 #include "Cubed/primitive_data.hpp"
+#include "Cubed/render/model_renderer.hpp"
 #include "Cubed/render/player_renderer.hpp"
 #include "Cubed/render/shader_manager.hpp"
 #include "Cubed/render/vertex_array.hpp"
@@ -19,6 +20,7 @@
 namespace Cubed {
 class TextureManager;
 class ClientWorld;
+class ModelManager;
 class DevPanel;
 class Renderer {
 public:
@@ -79,9 +81,10 @@ public:
 
     bool handle_event(const Event& e);
 
+    ModelRender& model_renderer();
+
 private:
     TextureManager& m_texture_manager;
-
     bool m_init = false;
 
     float m_aspect = 0.0f;
@@ -118,6 +121,7 @@ private:
     std::vector<Vertex2D> m_ui;
 
     WorldRenderer m_world_renderer;
+    ModelRender m_model_renderer;
     Config& m_config;
 
     bool handle_window_resize_event(const WindowResizeEvent& e);

include/Cubed/render/texture.hpp

@@ -38,9 +38,11 @@ enum TextureFormat : GLenum {
     R8 = GL_R8,
     RGB = GL_RGB,
     RGBA8 = GL_RGBA8,
+    BGRA = GL_BGRA
 
 };
-
+// You need to set the texture scaling method, otherwise it will render as
+// black.
 class Texture {
 public:
     explicit Texture(TextureType type);

include/Cubed/render/world_renderer.hpp

@@ -132,7 +132,8 @@ private:
 
     void render_underwater(ClientWorld& world);
     void render_outline(ClientWorld& world);
-    void render_player(ClientWorld& world);
+    void shadow_entity(ClientWorld& world, const glm::mat4& light_matrix);
+    void render_entity(ClientWorld& world);
 
     void render_normal_block(const glm::mat4& model_mat,
                              const glm::mat4& mv_mat, const glm::mat4& norm_mat,

include/Cubed/scene/scene_manager.hpp

@@ -36,6 +36,7 @@ public:
 
     App& app();
     WorldSceneParam& world_scene_param();
+    void push(SceneType type);
 
 private:
     enum class OperationType { PUSH, POP, CHANGE };
@@ -51,7 +52,7 @@ private:
     std::stack<std::unique_ptr<Scene>> m_scenes;
     void process_operation();
     void change(SceneType type);
-    void push(SceneType type);
+
     void pop(bool re_enter = true);
 
     std::unique_ptr<Scene> create_scene(SceneType);

include/Cubed/texture_manager.hpp

@@ -1,6 +1,7 @@
 #pragma once
 #include "Cubed/config.hpp"
 #include "Cubed/gameplay/block.hpp"
+#include "Cubed/gameplay/item.hpp"
 #include "Cubed/input/event.hpp"
 #include "Cubed/render/texture.hpp"
 
@@ -10,6 +11,26 @@
 namespace Cubed {
 
 class TextureManager {
+public:
+    using ItemTextureMap = std::unordered_map<ItemID, std::shared_ptr<Texture>>;
+    TextureManager(Config& config);
+    ~TextureManager();
+
+    void delete_texture();
+    const Texture* get_block_status_array() const;
+    const Texture* get_texture_array() const;
+    const Texture* get_cross_plane_array() const;
+    const Texture* get_image_texture(const std::string& path);
+    const Texture* get_pbr_texture() const;
+    const ItemTextureMap& get_item_textures() const;
+    const Texture* get_skin() const;
+    void init_texture();
+
+    void need_reload();
+    void update();
+    int max_aniso() const;
+    bool handle_event(const Event& e);
+
 private:
     bool m_need_reload = false;
     bool m_init = false;
@@ -18,7 +39,7 @@ private:
     std::unique_ptr<Texture> m_cross_plane_array;
     std::unique_ptr<Texture> m_normal_texture_array;
     std::unique_ptr<Texture> m_skin;
-    std::vector<std::unique_ptr<Texture>> m_item_textures;
+    ItemTextureMap m_item_textures;
     std::unordered_map<std::string, std::unique_ptr<Texture>> m_ui_map;
     GLfloat m_max_aniso = 0.0f;
     Config& m_config;
@@ -26,7 +47,7 @@ private:
 
     void load_block_status(unsigned status_id);
     void load_block_texture(unsigned block_id);
-    void load_block_item_texture(unsigned id);
+    void init_item_texture();
     void load_cross_plane_texture(unsigned id);
     const Texture* load_image_texture(const std::string& path);
     void load_pbr_texture(unsigned id);
@@ -37,25 +58,6 @@ private:
     void init_skin();
     void hot_reload();
     bool handle_key_event(const KeyEvent& e);
-
-public:
-    TextureManager(Config& config);
-    ~TextureManager();
-
-    void delete_texture();
-    const Texture* get_block_status_array() const;
-    const Texture* get_texture_array() const;
-    const Texture* get_cross_plane_array() const;
-    const Texture* get_image_texture(const std::string& path);
-    const Texture* get_pbr_texture() const;
-    const std::vector<std::unique_ptr<Texture>>& get_item_textures() const;
-    const Texture* get_skin() const;
-    void init_texture();
-
-    void need_reload();
-    void update();
-    int max_aniso() const;
-    bool handle_event(const Event& e);
 };
 
 } // namespace Cubed

include/Cubed/tools/cubed_concepts.hpp

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <type_traits>
+namespace Cubed {
+template <typename T>
+concept Ptr = std::is_pointer_v<T>;
+}

include/Cubed/tools/cubed_random.hpp

@@ -1,4 +1,6 @@
 #pragma once
+#include "glm/ext/vector_float3.hpp"
+
 #include <random>
 namespace Cubed {
 
@@ -14,6 +16,8 @@ public:
     int random_int(int min, int max);
     float random_float(float min, float max);
 
+    glm::vec3 random_direction_horizontal();
+
 private:
     unsigned int m_seed = 0;
     std::mt19937 m_engine;

include/Cubed/tools/json_utils.hpp

@@ -0,0 +1,8 @@
+
+#include <rapidjson/document.h>
+#include <string>
+#include <unordered_map>
+namespace Tools {
+std::unordered_map<std::string, std::string>
+doc_to_map(const rapidjson::Document& doc);
+}

include/Cubed/tools/model_loader.hpp

@@ -0,0 +1,22 @@
+#pragma once
+#include "Cubed/render/model_node.hpp"
+
+#include <assimp/Importer.hpp>
+#include <assimp/scene.h>
+namespace Cubed {
+
+class ModelLoader {
+public:
+    ModelLoader();
+    ModelNode load(const std::string& path);
+
+private:
+    Assimp::Importer m_importer;
+    ModelNode process_node(aiNode* node, const aiScene* scene);
+    Mesh process_mesh(aiMesh* mesh, const aiScene* scene);
+    bool process_texture(Mesh& mesh, aiMaterial* material, const aiScene* scene,
+                         aiTextureType type);
+    glm::mat4 convert_matrix(const aiMatrix4x4& matrix);
+};
+
+} // namespace Cubed

include/Cubed/tools/name_space.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <string_view>
+#include <vector>
+namespace Cubed {
+inline std::vector<std::string_view> parse_namespace(std::string_view str) {
+    std::vector<std::string_view> space;
+    space.reserve(4);
+    std::size_t p = str.find(':');
+    std::size_t start = 0;
+    while (p != std::string_view::npos) {
+        space.emplace_back(str.substr(start, p));
+        start = p + 1;
+        p = str.find(':', p + 1);
+    }
+    space.emplace_back(str.substr(start));
+    return space;
+}
+} // namespace Cubed

include/Cubed/tools/net_utils.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "Cubed/tools/cubed_concepts.hpp"
+#include "common/vector3.pb.h"
+#include "glm/ext/vector_float3.hpp"
+namespace Cubed {
+namespace Tools {
+inline void set_net_vec3(Vec3* p, const glm::vec3& pos) {
+    p->set_x(pos.x);
+    p->set_y(pos.y);
+    p->set_z(pos.z);
+}
+template <Ptr T> void set_net_pos(T ptr, const glm::vec3& pos) {
+    set_net_vec3(ptr->mutable_pos(), pos);
+}
+
+inline glm::vec3 get_net_vec3(const Vec3* p) {
+    return glm::vec3{p->x(), p->y(), p->z()};
+}
+inline glm::vec3 get_net_vec3(const Vec3& p) {
+    return glm::vec3{p.x(), p.y(), p.z()};
+}
+} // namespace Tools
+} // namespace Cubed

include/Cubed/tools/sensitive_filter.hpp

@@ -1,11 +1,13 @@
 #pragma once
 
-#include <nlohmann/json.hpp>
+#include <rapidjson/document.h>
+#include <unordered_map>
+#include <vector>
 namespace Cubed {
 class SensitiveFilter {
 public:
     SensitiveFilter();
-    void load(const nlohmann::json& j);
+    void load(const rapidjson::Document& doc);
     std::string filter(std::string_view text);
 
 private:

include/Cubed/tools/shader_tools.hpp

@@ -47,7 +47,7 @@ bool check_opengl_error();
 std::string read_shader_source(const std::string& file_path);
 
 ImageData load_image_data(const std::string& tex_image_path,
-                          bool check_exist = true);
+                          bool check_exist = true, bool full_path = false);
 
 } // namespace Tools
 

include/Cubed/tools/sparse_vector.hpp

@@ -0,0 +1,318 @@
+#pragma once
+#include <cassert>
+#include <cstddef>
+#include <cstdint>
+#include <iterator>
+#include <optional>
+#include <utility>
+#include <vector>
+namespace Cubed {
+template <typename T> class SparseVector {
+private:
+    std::vector<std::optional<T>> m_data;
+    std::vector<uint32_t> m_free_list;
+    std::vector<uint32_t> m_generation;
+
+    std::vector<uint32_t> m_dense;
+    std::vector<uint32_t> m_dense_index;
+
+public:
+    struct Handle {
+        uint32_t index;
+        uint32_t generation;
+
+        uint64_t value() const noexcept {
+            return (uint64_t(index) << 32) | generation;
+        }
+
+        bool operator==(const Handle&) const = default;
+
+        struct Hash {
+            size_t operator()(const Handle& h) const noexcept {
+                return h.value();
+            }
+        };
+    };
+
+    using value_type = T;
+    using reference = T&;
+    using const_reference = const T&;
+    using pointer = T*;
+
+    using size_type = size_t;
+
+    class iterator { // NOLINT
+    private:
+        SparseVector* m_owner;
+        size_t m_index;
+
+    public:
+        using iterator_category = std::random_access_iterator_tag;
+        using iterator_concept = std::random_access_iterator_tag;
+        using value_type = T;
+        using difference_type = std::ptrdiff_t;
+        using pointer = T*;
+        using reference = T&;
+
+        iterator(SparseVector* owner, size_t index)
+            : m_owner(owner), m_index(index) {}
+
+        reference operator*() {
+            return m_owner->m_data[m_owner->m_dense[m_index]].value();
+        }
+
+        pointer operator->() { return &(**this); }
+
+        iterator& operator++() {
+            ++m_index;
+            return *this;
+        }
+
+        iterator operator++(int) {
+            iterator tmp = *this;
+            ++(*this);
+            return tmp;
+        }
+
+        iterator& operator--() {
+            --m_index;
+            return *this;
+        }
+
+        iterator operator--(int) {
+            iterator tmp = *this;
+            --(*this);
+            return tmp;
+        }
+
+        bool operator==(const iterator& other) const {
+            return m_owner == other.m_owner && m_index == other.m_index;
+        }
+
+        bool operator!=(const iterator& other) const {
+            return !(*this == other);
+        }
+
+        iterator operator+(difference_type n) const {
+            return iterator(m_owner, m_index + n);
+        }
+
+        iterator operator-(difference_type n) const {
+            return iterator(m_owner, m_index - n);
+        }
+
+        difference_type operator-(const iterator& other) const {
+            return static_cast<difference_type>(m_index) -
+                   static_cast<difference_type>(other.m_index);
+        }
+
+        iterator& operator+=(difference_type n) {
+            m_index += n;
+            return *this;
+        }
+
+        iterator& operator-=(difference_type n) {
+            m_index -= n;
+            return *this;
+        }
+
+        reference operator[](difference_type n) const { return *(*this + n); }
+
+        bool operator<(const iterator& other) const {
+            return m_index < other.m_index;
+        }
+
+        bool operator>(const iterator& other) const {
+            return m_index > other.m_index;
+        }
+
+        bool operator<=(const iterator& other) const {
+            return m_index <= other.m_index;
+        }
+
+        bool operator>=(const iterator& other) const {
+            return m_index >= other.m_index;
+        }
+        friend iterator operator+(difference_type n, const iterator& it) {
+            return it + n;
+        }
+    };
+
+    class const_iterator { // NOLINT
+    private:
+        const SparseVector* m_owner;
+        size_t m_index;
+
+    public:
+        using iterator_category = std::random_access_iterator_tag;
+        using iterator_concept = std::random_access_iterator_tag;
+        using value_type = T;
+        using difference_type = std::ptrdiff_t;
+        using pointer = const T*;
+        using reference = const T&;
+
+        const_iterator(const SparseVector* owner, size_t index)
+            : m_owner(owner), m_index(index) {}
+
+        reference operator*() const {
+            return m_owner->m_data[m_owner->m_dense[m_index]].value();
+        }
+
+        pointer operator->() const { return &(**this); }
+
+        const_iterator& operator++() {
+            ++m_index;
+            return *this;
+        }
+
+        const_iterator operator++(int) {
+            const_iterator tmp = *this;
+            ++(*this);
+            return tmp;
+        }
+
+        const_iterator& operator--() {
+            --m_index;
+            return *this;
+        }
+
+        const_iterator operator--(int) {
+            const_iterator tmp = *this;
+            --(*this);
+            return tmp;
+        }
+
+        bool operator==(const const_iterator& other) const {
+            return m_owner == other.m_owner && m_index == other.m_index;
+        }
+
+        bool operator!=(const const_iterator& other) const {
+            return !(*this == other);
+        }
+
+        const_iterator operator+(difference_type n) const {
+            return const_iterator(m_owner, m_index + n);
+        }
+
+        const_iterator operator-(difference_type n) const {
+            return const_iterator(m_owner, m_index - n);
+        }
+
+        difference_type operator-(const const_iterator& other) const {
+            return static_cast<difference_type>(m_index) -
+                   static_cast<difference_type>(other.m_index);
+        }
+
+        const_iterator& operator+=(difference_type n) {
+            m_index += n;
+            return *this;
+        }
+
+        const_iterator& operator-=(difference_type n) {
+            m_index -= n;
+            return *this;
+        }
+
+        reference operator[](difference_type n) const { return *(*this + n); }
+
+        bool operator<(const const_iterator& other) const {
+            return m_index < other.m_index;
+        }
+
+        bool operator>(const const_iterator& other) const {
+            return m_index > other.m_index;
+        }
+
+        bool operator<=(const const_iterator& other) const {
+            return m_index <= other.m_index;
+        }
+
+        bool operator>=(const const_iterator& other) const {
+            return m_index >= other.m_index;
+        }
+        friend const_iterator operator+(difference_type n,
+                                        const const_iterator& it) {
+            return it + n;
+        }
+    };
+
+    template <class U> [[nodiscard]] Handle insert(U&& value) {
+        uint32_t id;
+        if (!m_free_list.empty()) {
+            id = m_free_list.back();
+            m_free_list.pop_back();
+            m_data[id].emplace(std::forward<U>(value));
+
+            m_dense_index[id] = m_dense.size();
+        } else {
+            id = m_data.size();
+            m_data.push_back(std::forward<U>(value));
+            m_generation.push_back(1);
+            m_dense_index.emplace_back(m_dense.size());
+        }
+
+        m_dense.push_back(id);
+        return {id, m_generation[id]};
+    }
+
+    template <typename... Args> Handle emplace(Args&&... args) {
+        return insert(T(std::forward<Args>(args)...));
+    }
+
+    void erase(Handle h) {
+
+        if (!exists(h)) {
+            return;
+        }
+        uint32_t id = h.index;
+        m_free_list.push_back(id);
+        uint32_t index = m_dense_index[id];
+        uint32_t last_id = m_dense.back();
+        m_dense[index] = last_id;
+        m_dense_index[last_id] = index;
+
+        m_dense.pop_back();
+        m_data[id].reset();
+        ++m_generation[id];
+    }
+
+    T& operator[](Handle h) {
+        assert(exists(h));
+        return m_data[h.index].value();
+    }
+
+    const T& operator[](Handle h) const {
+        assert(exists(h));
+        return m_data[h.index].value();
+    }
+
+    bool exists(Handle h) const {
+        return h.index < m_generation.size() &&
+               m_generation[h.index] == h.generation;
+    }
+
+    void reserve(size_t n) {
+        m_data.reserve(n);
+        m_generation.reserve(n);
+        m_dense.reserve(n);
+        m_dense_index.reserve(n);
+    }
+
+    size_t size() const { return m_dense.size(); }
+
+    bool empty() const { return m_dense.empty(); }
+
+    iterator begin() { return iterator(this, 0); }
+
+    iterator end() { return iterator(this, m_dense.size()); }
+
+    const_iterator begin() const { return const_iterator(this, 0); }
+
+    const_iterator end() const { return const_iterator(this, m_dense.size()); }
+
+    const_iterator cbegin() const { return begin(); }
+
+    const_iterator cend() const { return end(); }
+};
+
+} // namespace Cubed

include/Cubed/tools/threas_utils.hpp

@@ -0,0 +1,130 @@
+#pragma once
+#include "Cubed/gameplay/world.hpp"
+#include "Cubed/tools/cubed_assert.hpp"
+
+#include <algorithm>
+#include <thread>
+namespace Cubed {
+namespace Tools {
+
+constexpr size_t SERVER_RESERVED_THREADS = 3; // tick + netio + gen scheduler
+constexpr size_t CLIENT_RESERVED_THREADS =
+    3; // main/render + netio + system reserved
+
+constexpr size_t safe_sub(size_t a, size_t b) { return a > b ? a - b : 0; }
+
+inline size_t get_hardware_threads() {
+    auto hc = std::thread::hardware_concurrency();
+    return hc == 0 ? 4 : static_cast<size_t>(hc);
+}
+
+inline size_t get_server_available_threads() {
+    return std::max<size_t>(
+        1, safe_sub(get_hardware_threads(), SERVER_RESERVED_THREADS));
+}
+
+inline size_t get_client_available_threads() {
+    return std::max<size_t>(
+        1, safe_sub(get_hardware_threads(), CLIENT_RESERVED_THREADS));
+}
+
+inline size_t get_client_threads(RunMode mode) {
+    switch (mode) {
+    case RunMode::SERVER_ONLY:
+        ASSERT_MSG(false, "Server Only don't need client pool");
+        return 1;
+    case RunMode::CLIENT_ONLY: {
+        auto available = get_client_available_threads();
+        return std::clamp<size_t>(available, 1, 16);
+    }
+
+    case RunMode::HYBRID: {
+        auto available = get_client_available_threads();
+        return std::clamp<size_t>(available / 2, 1, 4);
+    }
+    }
+    return 1;
+}
+
+inline size_t get_server_net_pool_threads(RunMode mode) {
+    switch (mode) {
+
+    case RunMode::SERVER_ONLY: {
+        auto available = get_server_available_threads();
+        return std::clamp<size_t>(available / 4, 1,
+                                  std::min<size_t>(4, available));
+    }
+
+    case RunMode::CLIENT_ONLY:
+        ASSERT_MSG(false, "Client Only don't need net pool");
+        return 1;
+    case RunMode::HYBRID: {
+        auto available = get_server_available_threads();
+        return std::clamp<size_t>(available / 8, 1,
+                                  std::min<size_t>(4, available));
+    }
+    }
+    return 1;
+}
+
+inline size_t get_server_compute_treads(RunMode mode) {
+    switch (mode) {
+    case RunMode::HYBRID:
+    case RunMode::SERVER_ONLY: {
+        auto available = get_server_available_threads();
+
+        return std::clamp<size_t>(available / 4, 1,
+                                  std::min<size_t>(4, available));
+    }
+    case RunMode::CLIENT_ONLY:
+        ASSERT_MSG(false, "Client Only don't need update pool");
+        return 1;
+    }
+    return 1;
+}
+
+inline size_t get_server_gen_threads(RunMode mode) {
+    switch (mode) {
+    case RunMode::SERVER_ONLY: {
+        auto available = get_server_available_threads();
+
+        auto net_pool = get_server_net_pool_threads(mode);
+
+        auto update_pool = get_server_compute_treads(mode);
+
+        size_t remain = available;
+
+        remain -= std::min(remain, net_pool);
+
+        remain -= std::min(remain, update_pool);
+
+        return std::max<size_t>(1, remain);
+    }
+    case RunMode::CLIENT_ONLY:
+        ASSERT_MSG(false, "Client Only don't need gen pool");
+        return 1;
+    case RunMode::HYBRID: {
+        auto available = get_server_available_threads();
+
+        auto net_pool = get_server_net_pool_threads(mode);
+
+        auto update_pool = get_server_compute_treads(mode);
+
+        auto client_pool = get_client_threads(mode);
+
+        size_t remain = available;
+
+        remain -= std::min(remain, net_pool);
+
+        remain -= std::min(remain, update_pool);
+
+        remain -= std::min(remain, client_pool);
+
+        return std::max<size_t>(1, remain);
+    }
+    }
+    return 1;
+}
+
+} // namespace Tools
+} // namespace Cubed

include/Cubed/ui/inventory_ui.hpp

@@ -20,7 +20,7 @@ private:
     Label* m_item_info = nullptr;
 
     Image* m_selected_image = nullptr;
-    BlockType m_selected_block = 0;
+    BlockType m_selected_id = 0;
     void update_item_info();
     bool handle_mouse_button_event(const MouseButtonEvent& e) override;
 

include/Cubed/ui/item_slot.hpp

@@ -1,6 +1,6 @@
 #pragma once
 
-#include "Cubed/gameplay/block.hpp"
+#include "Cubed/gameplay/item.hpp"
 #include "Cubed/ui/image.hpp"
 #include "Cubed/ui/widget.hpp"
 namespace Cubed {
@@ -13,11 +13,11 @@ public:
 
     ItemSlot& set_default_background(TextureManager& m_texture_manager);
     ItemSlot& set_scale(float m_scale);
-    ItemSlot& set_item(BlockType id, const Texture* texture);
+    ItemSlot& set_item(ItemID id, const Texture* texture);
     float width() const override;
     float height() const override;
     bool handle_mouse_move_event(const MouseMoveEvent& e) override;
-    BlockType block() const;
+    ItemID id() const;
     bool hovered() const;
 
 private:
@@ -26,7 +26,7 @@ private:
     void on_update(float dt) override;
     std::unique_ptr<Image> m_background;
     std::unique_ptr<Image> m_foreground;
-    BlockType m_block_type;
+    ItemID m_id;
     float m_scale = 1.0f;
     bool m_hovered = false;
 };