feat(gameplay): add entity managers and refactor to ECS components

include/Cubed/gameplay/client_entity_manager.hpp

@@ -0,0 +1,54 @@
+#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 };
+
+    ClientEntityManager(ClientWorld& world);
+    void update();
+    void init();
+    // not thread safe
+    void add_entity(EntityID id, std::string_view name, const glm::vec3& pos);
+
+    void receive_entity_create(S2CEntityCreate& s2c);
+
+private:
+    struct EntityCreateElement {
+        EntityID id;
+        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<void(EntityID id)>;
+    using TaskElement = std::variant<EntityCreateElement>;
+    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();
+
+    template <typename... Args> void add_entity(EntityID id, Args&&... args) {
+        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/ecs/client_entity.hpp

@@ -1,15 +1,9 @@
 #pragma once
 #include "Cubed/gameplay/ecs/animation.hpp"
-#include "Cubed/gameplay/ecs/entity.hpp"
-#include "Cubed/gameplay/ecs/identity.hpp"
 #include "Cubed/gameplay/ecs/transform.hpp"
 #include "Cubed/gameplay/model.hpp"
 namespace Cubed {
-struct ClientEntity {
-
-    Entity entity;
-
-    EntityInfo info;
+struct BaseClientCreature {
 
     Transform transform;
 

include/Cubed/gameplay/ecs/server_entity.hpp

@@ -1,32 +1,27 @@
 #pragma once
-#include "Cubed/gameplay/ecs/entity.hpp"
 #include "Cubed/gameplay/ecs/health.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/hitbox.hpp"
 namespace Cubed {
-struct ServerEntity {
 
-    Entity entity;
+struct BaseServerCreature {
+    Transform transform{};
 
-    EntityInfo info;
+    Velocity velocity{};
 
-    Transform transform;
+    Movement movement{};
 
-    Velocity velocity;
+    MoveState move_state{};
 
-    Movement movement;
+    Direction direction{};
 
-    MoveState move_state;
+    Gravity gravity{};
 
-    Direction direction;
+    Health health{};
 
-    Gravity gravity;
-
-    Health health;
-
-    HitboxID hitbox;
+    HitboxID hitbox{};
 };
+
 } // namespace Cubed

include/Cubed/gameplay/ecs/transform.hpp

@@ -16,9 +16,9 @@ struct Direction {
 };
 
 struct Transform {
-    Position position;
-    Orientation orientation;
-    Direction direction;
+    Position position{};
+    Orientation orientation{};
+    Direction direction{};
 };
 
 } // namespace Cubed

include/Cubed/gameplay/packet.hpp

@@ -60,6 +60,7 @@ enum class PacketEnum : uint16_t {
     BLOCK_CHANGE_REQ = 3003,
     BLOCK_CHANGE_RSP = 3004,
     S2C_CLEAR_ALL_CHUNKS = 3005,
+    S2C_ENTITY_CREATE = 3006,
     UPDATE_TIME = 3006,
     CHAT_MSG = 4001,
     VOICE_MSG = 4002,
@@ -111,6 +112,9 @@ 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<UpdateTime>() {
     return std::to_underlying(PacketEnum::UPDATE_TIME);
 }

include/Cubed/gameplay/server_entity_manager.hpp

@@ -0,0 +1,42 @@
+#pragma once
+#include "Cubed/gameplay/ecs/entity.hpp"
+#include "glm/ext/vector_float3.hpp"
+
+#include <entt/entt.hpp>
+#include <tbb/concurrent_hash_map.h>
+namespace Cubed {
+class ServerWorld;
+class ServerEntityManager {
+public:
+    ServerEntityManager(ServerWorld& world);
+
+    void init();
+    // not thread safe
+    void add_entity(std::string_view name, const glm::vec3& pos);
+
+private:
+    using EntityMap = tbb::concurrent_hash_map<EntityID, entt::entity>;
+    using acc = EntityMap::accessor;
+    using cacc = EntityMap::const_accessor;
+    using CreateFunc = std::function<EntityID()>;
+    ServerWorld& m_world;
+    entt::registry m_registry;
+    EntityID m_next = 0;
+    EntityMap m_entities;
+    std::unordered_map<std::string_view, CreateFunc> m_factories;
+
+    void send_entity_create(EntityID id, std::string_view name,
+                            const glm::vec3& pos);
+
+    template <typename... Args> EntityID add_entity(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

@@ -7,6 +7,7 @@
 #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"
@@ -87,6 +88,8 @@ public:
     void handle_voice_message(VoiceMsg& msg);
     int chunk_size() const;
 
+    std::vector<std::shared_ptr<Session>> get_all_session() 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;
@@ -132,7 +135,7 @@ private:
     using uuid_cacc = PlayerUUIDMap::const_accessor;
 
     Config& m_config;
-
+    ServerEntityManager m_entity_manager;
     // key = uuid
     PlayerHashMap m_players;
     ChunkHashMap m_chunks;
@@ -162,7 +165,7 @@ 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;
 

include/Cubed/gameplay/systems/physical_system.hpp

@@ -1,5 +1,7 @@
 #pragma once
-#include "Cubed//gameplay/ecs/server_entity.hpp"
+#include "Cubed/gameplay/ecs/movement.hpp"
+#include "Cubed/gameplay/ecs/state.hpp"
+#include "Cubed/gameplay/ecs/transform.hpp"
 #include "Cubed/gameplay/world.hpp"
 namespace Cubed {
 
@@ -7,10 +9,6 @@ class PhysicalSystem {
 public:
     static glm::vec3 get_move_distance(float dt, const Direction& d,
                                        const Velocity& v);
-    static std::tuple<bool, bool, bool> update(float dt, ServerEntity& e,
-                                               World& world);
-    static std::tuple<bool, bool, bool>
-    update(float dt, ServerEntity& e, World& world, glm::vec3& moved_pos);
 
     static std::tuple<bool, bool, bool>
     update(float dt, World& world, glm::vec3& moved_pos, Velocity& v,

include/Cubed/gameplay/systems/speed_system.hpp

@@ -1,12 +1,12 @@
 #pragma once
 
-#include "Cubed/gameplay/ecs/server_entity.hpp"
+#include "Cubed/gameplay/ecs/movement.hpp"
 #include "Cubed/gameplay/ecs/state.hpp"
+#include "Cubed/gameplay/ecs/transform.hpp"
 
 namespace Cubed {
 class SpeedSystem {
 public:
-    static void update(float dt, ServerEntity& e);
     static void update(float dt, Velocity& v, MoveState& move_state,
                        Movement& movement, Direction& direction,
                        const Gravity& g);

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/net_utils.hpp

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "Cubed/tools/cubed_concepts.hpp"
+#include "common/vector3.pb.h"
+#include "glm/ext/vector_float3.hpp"
+namespace Cubed {
+namespace Tools {
+template <Ptr T> void set_net_pos(T ptr, const glm::vec3& pos) {
+    Vec3* p = ptr->mutable_pos();
+    p->set_x(pos.x);
+    p->set_y(pos.y);
+    p->set_z(pos.z);
+}
+} // namespace Tools
+} // namespace Cubed

src/CMakeLists.txt

@@ -100,4 +100,6 @@ target_sources(${PROJECT_NAME}
         gameplay/systems/physical_system.cpp
         gameplay/systems/speed_system.cpp
         gameplay/client_player_manager.cpp
+        gameplay/server_entity_manager.cpp
+        gameplay/client_entity_manager.cpp
 )

src/gameplay/client_entity_manager.cpp

@@ -0,0 +1,53 @@
+#include "Cubed/gameplay/client_entity_manager.hpp"
+
+#include "Cubed/gameplay/creatures/pig.hpp"
+#include "Cubed/gameplay/ecs/client_entity.hpp"
+#include "Cubed/gameplay/ecs/identity.hpp"
+#include "Cubed/gameplay/ecs/transform.hpp"
+#include "Cubed/render/model_manager.hpp"
+#include "Cubed/tools/cubed_assert.hpp"
+namespace Cubed {
+ClientEntityManager::ClientEntityManager(ClientWorld& world) : m_world(world) {}
+void ClientEntityManager::update() { handle_task(); }
+void ClientEntityManager::init() {
+    m_factories.emplace("cubed:pig", [this](EntityID id) {
+        BaseClientCreature c;
+        c.model = ModelManager::instance().get_model_id("cubed:pig");
+        add_entity(id, Entity{id}, EntityInfo{"cubed:pig", ""}, std::move(c),
+                   PigTag{});
+    });
+}
+// not thread safe
+void ClientEntityManager::add_entity(EntityID id, std::string_view name,
+                                     const glm::vec3& pos) {
+
+    m_factories[name](id);
+    acc a;
+    ASSERT(m_entities.find(a, id));
+    auto* c = m_registry.try_get<Transform>(a->second);
+    ASSERT(c);
+    c->position.value = pos;
+}
+
+void ClientEntityManager::receive_entity_create(S2CEntityCreate& s2c) {
+    EntityCreateElement c;
+    c.id = s2c.id();
+    c.name = s2c.name();
+    c.pos = {s2c.pos().x(), s2c.pos().y(), s2c.pos().z()};
+    m_tasks.emplace(Command::CREATE, std::move(c));
+}
+
+void ClientEntityManager::handle_task() {
+    TaskPair pair;
+    while (m_tasks.try_pop(pair)) {
+        switch (pair.first) {
+        case Command::CREATE:
+            auto* p = std::get_if<EntityCreateElement>(&pair.second);
+            ASSERT(p);
+
+            add_entity(p->id, p->name, p->pos);
+        }
+    }
+}
+
+} // namespace Cubed

src/gameplay/client_player_manager.cpp

@@ -1,4 +1,3 @@
-#pragma once
 #include "Cubed/gameplay/client_player_manager.hpp"
 
 #include "Cubed/gameplay/client_world.hpp"

src/gameplay/server_entity_manager.cpp

@@ -0,0 +1,53 @@
+#include "Cubed/gameplay/server_entity_manager.hpp"
+
+#include "Cubed/gameplay/creatures/pig.hpp"
+#include "Cubed/gameplay/ecs/identity.hpp"
+#include "Cubed/gameplay/ecs/server_entity.hpp"
+#include "Cubed/gameplay/hitbox_manager.hpp"
+#include "Cubed/gameplay/server_world.hpp"
+#include "Cubed/gameplay/session.hpp"
+#include "Cubed/tools/cubed_assert.hpp"
+#include "Cubed/tools/net_utils.hpp"
+using namespace google::protobuf;
+
+namespace Cubed {
+ServerEntityManager::ServerEntityManager(ServerWorld& world) : m_world(world) {}
+
+void ServerEntityManager::init() {
+    m_factories.try_emplace("cubed:pig", [this]() {
+        BaseServerCreature c;
+        c.hitbox = HitboxManager::instance().get_hitbox_id("cubed:pig");
+        return add_entity(Entity{m_next}, EntityInfo{"cubed:pig", ""},
+                          std::move(c), PigTag{});
+    });
+}
+
+void ServerEntityManager::add_entity(std::string_view name,
+                                     const glm::vec3& pos) {
+    ASSERT(m_factories.contains(name));
+    auto e = m_factories[name]();
+    acc c;
+    if (m_entities.find(c, e)) {
+        auto t = m_registry.try_get<BaseServerCreature>(c->second);
+        ASSERT(t);
+        t->transform.position.value = pos;
+    }
+    send_entity_create(e, name, pos);
+}
+
+void ServerEntityManager::send_entity_create(EntityID id, std::string_view name,
+                                             const glm::vec3& pos) {
+    auto sessions = m_world.get_all_session();
+
+    Arena arena;
+    auto* s2c = Arena::Create<S2CEntityCreate>(&arena);
+    s2c->set_id(id);
+    s2c->set_name(name);
+    Tools::set_net_pos(s2c, pos);
+
+    for (auto& s : sessions) {
+        s->send(make_packet(*s2c));
+    }
+}
+
+} // namespace Cubed

src/gameplay/server_world.cpp

@@ -16,7 +16,8 @@ using namespace google::protobuf;
 namespace fs = std::filesystem;
 using nlohmann::json;
 namespace Cubed {
-ServerWorld::ServerWorld(Config& config) : m_config(config) {}
+ServerWorld::ServerWorld(Config& config)
+    : m_config(config), m_entity_manager(*this) {}
 
 ServerWorld::~ServerWorld() { stop(); }
 
@@ -85,7 +86,7 @@ void ServerWorld::send_time() {
     rsp->set_day_tick(m_day_tick);
     rsp->set_game_tick(m_game_ticks);
     {
-        std::shared_lock lock(m_player_mutex);
+        std::shared_lock lock(m_players_mutex);
         for (auto& [uuid, player] : m_players) {
             player.get_session()->send(make_packet(*rsp), 3);
         }
@@ -96,7 +97,7 @@ void ServerWorld::send_chunk(int task_id, const std::string& uuid,
                              ChunkPos pos) {
 
     {
-        std::shared_lock lock(m_player_mutex);
+        std::shared_lock lock(m_players_mutex);
         auto it = m_players.find(uuid);
         if (it == m_players.end()) {
             return;
@@ -159,7 +160,7 @@ void ServerWorld::send_chunk(int task_id, const std::string& uuid,
     }
     std::shared_ptr<Session> s;
     {
-        std::shared_lock lock(m_player_mutex);
+        std::shared_lock lock(m_players_mutex);
         auto it = m_players.find(uuid);
         if (it != m_players.end()) {
             s = it->second.get_session();
@@ -176,10 +177,12 @@ void ServerWorld::send_chunk(int task_id, const std::string& uuid,
 
 void ServerWorld::init_world() {
 
+    m_entity_manager.init();
+
     register_timer("player disconnect", 5, [this]() {
         std::vector<std::string> disconnect;
         {
-            std::shared_lock lock(m_player_mutex);
+            std::shared_lock lock(m_players_mutex);
             for (auto& [uuid, player] : m_players) {
                 if (player.is_disconnect(m_game_ticks)) {
                     disconnect.emplace_back(uuid);
@@ -243,7 +246,7 @@ void ServerWorld::gen_chunks_internal(const std::string& uuid) {
     ChunkPosSet old_set;
     sync_and_collect_missing_chunks(need_gen_chunks_pos, required_chunks_set);
     {
-        std::lock_guard lock(m_player_mutex);
+        std::lock_guard lock(m_players_mutex);
         auto it = m_players.find(uuid);
         if (it == m_players.end()) {
             return;
@@ -564,7 +567,7 @@ void ServerWorld::sync_player_pos(const C2S_PlayerInfo& prsp) {
     auto yaw = prsp.yaw();
     auto pitch = prsp.pitch();
     {
-        std::lock_guard lock(m_player_mutex);
+        std::lock_guard lock(m_players_mutex);
         auto it = m_players.find(uuid);
         if (it == m_players.end()) {
             Logger::warn("Player {} is not in this Server", uuid);
@@ -583,7 +586,7 @@ void ServerWorld::sync_player_pos(const C2S_PlayerInfo& prsp) {
     // update other player pos;
     std::vector<std::shared_ptr<Session>> other;
     {
-        std::shared_lock lock(m_player_mutex);
+        std::shared_lock lock(m_players_mutex);
         for (auto& [o_uuid, player] : m_players) {
             if (o_uuid == uuid) {
                 continue;
@@ -624,7 +627,7 @@ void ServerWorld::sync_player_water_sound(const PlayerWaterSound& rsp) {
     std::vector<std::shared_ptr<Session>> other;
 
     {
-        std::shared_lock lock(m_player_mutex);
+        std::shared_lock lock(m_players_mutex);
         for (auto& [o_uuid, player] : m_players) {
             if (o_uuid == uuid) {
                 continue;
@@ -660,7 +663,7 @@ void ServerWorld::handle_player_login(const std::string& name,
     Logger::info("Player {} (uuid {}) join the world", name, uuid);
     bool sucess = true;
     {
-        std::lock_guard lock(m_player_mutex);
+        std::lock_guard lock(m_players_mutex);
         auto [_, inserted] = m_players.emplace(
             std::piecewise_construct, std::forward_as_tuple(std::string(uuid)),
             std::forward_as_tuple(name, uuid, *this, session, m_game_ticks));
@@ -710,7 +713,7 @@ void ServerWorld::handle_player_exit(const std::string& uuid) {
     ChunkPosSet old_set;
     std::string name;
     {
-        std::lock_guard lock(m_player_mutex);
+        std::lock_guard lock(m_players_mutex);
         auto it = m_players.find(uuid);
         if (it != m_players.end()) {
             name = it->second.get_name();
@@ -737,7 +740,7 @@ void ServerWorld::handle_player_exit(const std::string& uuid) {
 
     std::vector<std::shared_ptr<Session>> sessions;
     {
-        std::shared_lock lock(m_player_mutex);
+        std::shared_lock lock(m_players_mutex);
         for (auto& [uuid, player] : m_players) {
             sessions.emplace_back(player.get_session());
         }
@@ -754,7 +757,7 @@ void ServerWorld::handle_player_exit(const std::string& uuid) {
 }
 
 glm::vec3 ServerWorld::get_player_pos(const std::string& uuid) const {
-    std::shared_lock lock(m_player_mutex);
+    std::shared_lock lock(m_players_mutex);
     auto it = m_players.find(uuid);
     if (it == m_players.end()) {
         Logger::error("Can't find player uuid {}", uuid);
@@ -766,7 +769,7 @@ glm::vec3 ServerWorld::get_player_pos(const std::string& uuid) const {
 void ServerWorld::handle_chunk_req(int task_id, const std::string& uuid,
                                    ChunkPos pos) {
     {
-        std::shared_lock lock(m_player_mutex);
+        std::shared_lock lock(m_players_mutex);
         auto it = m_players.find(uuid);
         if (it == m_players.end()) {
             return;
@@ -804,7 +807,7 @@ void ServerWorld::handle_voice_message(VoiceMsg& msg) {
         std::vector<std::shared_ptr<Session>> session;
 
         {
-            std::shared_lock lock(m_player_mutex);
+            std::shared_lock lock(m_players_mutex);
             for (auto& [key, player] : m_players) {
                 if (key == uuid) {
                     continue;
@@ -851,7 +854,7 @@ void ServerWorld::handle_block_change(const BlockChangeReq& req) {
     std::vector<std::shared_ptr<Session>> sessions;
     auto chunk_pos = get_chunk_pos(x, z);
     {
-        std::shared_lock lock(m_player_mutex);
+        std::shared_lock lock(m_players_mutex);
         for (auto& [uuid, player] : m_players) {
             if (player.has_player(chunk_pos)) {
                 auto session = player.get_session();
@@ -934,7 +937,7 @@ void ServerWorld::send_server_stop() {
     Arena arena;
     auto* rsp = Arena::Create<LogoutRsp>(&arena);
     rsp->set_server_stop(true);
-    std::shared_lock lock(m_player_mutex);
+    std::shared_lock lock(m_players_mutex);
     for (auto& [uuid, player] : m_players) {
         player.get_session()->send(make_packet(*rsp), 0);
     }
@@ -947,7 +950,7 @@ void ServerWorld::boardcast_message(const std::string& name,
 
     std::vector<std::shared_ptr<Session>> m_session;
     {
-        std::shared_lock lock(m_player_mutex);
+        std::shared_lock lock(m_players_mutex);
         for (auto& [_, p] : m_players) {
             m_session.emplace_back(p.get_session());
         }
@@ -990,6 +993,15 @@ void ServerWorld::set_chunk_load_style(int id) {
 
 int ServerWorld::chunk_size() const { return m_chunks.size(); }
 
+std::vector<std::shared_ptr<Session>> ServerWorld::get_all_session() const {
+    std::shared_lock lock(m_players_mutex);
+    std::vector<std::shared_ptr<Session>> sessions;
+    for (const auto& [_, player] : m_players) {
+        sessions.emplace_back(player.get_session());
+    }
+    return sessions;
+}
+
 int ServerWorld::get_block(const glm::ivec3& block_pos) const {
     auto [chunk_x, chunk_z] = get_chunk_pos(block_pos.x, block_pos.z);
     chunk_cacc cacc;

src/gameplay/systems/physical_system.cpp

@@ -99,21 +99,6 @@ bool update_z(const glm::vec3& pos, const glm::vec3& distance, World& world,
 }
 
 } // namespace
-std::tuple<bool, bool, bool> PhysicalSystem::update(float dt, ServerEntity& e,
-                                                    World& world) {
-    glm::vec3 pos = e.transform.position.value;
-    auto ans = update(dt, e, world, pos);
-    e.transform.position.value = pos;
-    return ans;
-}
-
-std::tuple<bool, bool, bool> PhysicalSystem::update(float dt, ServerEntity& e,
-                                                    World& world,
-                                                    glm::vec3& moved_pos) {
-
-    return update(dt, world, moved_pos, e.velocity, e.direction, e.move_state,
-                  e.hitbox);
-}
 
 std::tuple<bool, bool, bool>
 PhysicalSystem::update(float dt, World& world, glm::vec3& moved_pos,

src/gameplay/systems/speed_system.cpp

@@ -1,9 +1,6 @@
 #include "Cubed/gameplay/systems/speed_system.hpp"
 
 namespace Cubed {
-void SpeedSystem::update(float dt, ServerEntity& e) {
-    update(dt, e.velocity, e.move_state, e.movement, e.direction, e.gravity);
-}
 
 void SpeedSystem::update(float dt, Velocity& v, MoveState& move_state,
                          Movement& movement, Direction& direction,

src/proto/packet.proto

@@ -10,4 +10,5 @@ import "system/pong.proto";
 import "world/chunk_data.proto";
 import "world/block_change.proto";
 import "world/time.proto";
+import "world/entity.proto";
 import "chat/chat.proto";

src/proto/world/entity.proto

@@ -0,0 +1,9 @@
+syntax = "proto3";
+
+import "common/vector3.proto";
+
+message S2CEntityCreate {
+    uint64 id = 1;
+    string name = 2;
+    Vec3 pos = 3;
+}