diff --git a/server/gameserver/building.cc b/server/gameserver/building.cc
index f37047e..7423834 100644
--- a/server/gameserver/building.cc
+++ b/server/gameserver/building.cc
@@ -35,11 +35,30 @@ void Building::RecalcSelfCollider()
         colliders.push_back(collider);
     }
     for (auto& obj : meta->doors) {
-        #if 0
-        MetaData::MapThing* thing = MetaMgr::Instance()->GetMapThing(obj.id());
+        MetaData::MapThing* thing = MetaMgr::Instance()->GetMapThing(61018);
         if (thing) {
+            Obstacle* entity = new Obstacle();
+            entity->room = room;
+            entity->meta = thing;
+            entity->entity_uniid = room->AllocUniid();
+            entity->is_door = true;
+            entity->door_id = obj.door_id;
+            entity->door_state = DoorStateClose;
+            entity->building = this;
+            entity->door_house_uniid = entity_uniid;
+            entity->door_state0 = obj.state0;
+            entity->door_state1 = obj.state1;
+            #if 1
+            entity->pos = Vector2D(pos.x + entity->door_state0->x() - meta->i->tilewidth() / 2.0,
+                                   pos.y + entity->door_state0->y() - meta->i->tileheight() / 2.0);
+            #endif
+            entity->Initialize();
+            room->uniid_hash_[entity->entity_uniid] = entity;
+            for (auto& pair : room->human_hash_) {
+                pair.second->new_objects.insert(entity);
+                pair.second->part_objects.insert(entity);
+            }
         }
-        #endif
     }
     for (auto& obj : meta->i->lootobj()) {
         MetaData::MapThing* thing = MetaMgr::Instance()->GetMapThing(obj.id());
diff --git a/server/gameserver/constant.h b/server/gameserver/constant.h
index 640ab05..73c3afc 100755
--- a/server/gameserver/constant.h
+++ b/server/gameserver/constant.h
@@ -44,6 +44,12 @@ enum SyncData_e
     SYNC_Data_Exp = 0,
 };
 
+enum DoorState_e
+{
+    DoorStateClose = 0,
+    DoorStateOpen = 1
+};
+
 const char* const PROJ_NAME_FMT = "game%d_gameserver";
 const char* const PROJ_ROOT_FMT = "/data/logs/%s";
 
diff --git a/server/gameserver/metadata.cc b/server/gameserver/metadata.cc
index 4e417ad..23fb135 100644
--- a/server/gameserver/metadata.cc
+++ b/server/gameserver/metadata.cc
@@ -68,4 +68,40 @@ namespace MetaData
         }
     }
 
+    void Building::Init()
+    {
+        for (auto& door_meta : i->doorobj()) {
+            Door* p_door = nullptr;
+            for (auto& door : doors) {
+                if (door.door_id == door_meta.id()) {
+                    p_door = &door;
+                    break;
+                }
+            }
+            if (!p_door) {
+                p_door = &a8::FastAppend(doors);
+                p_door->door_id = door_meta.id();
+            }
+            switch (door_meta.type()) {
+            case 1:
+                {
+                    p_door->state0 = &door_meta;
+                }
+                break;
+            case 2:
+                {
+                    p_door->state1 = &door_meta;
+                }
+                break;
+            }
+        }//end for
+
+        for (auto& door : doors) {
+            if (door.door_id == 0 ||
+                !door.state0 || !door.state1) {
+                abort();
+            }
+        }
+    }
+
 }
diff --git a/server/gameserver/metadata.h b/server/gameserver/metadata.h
index 8f5718c..124c9e3 100755
--- a/server/gameserver/metadata.h
+++ b/server/gameserver/metadata.h
@@ -47,12 +47,13 @@ namespace MetaData
             int door_id = 0;
             const metatable::DoorObjJson* state0 = nullptr;
             const metatable::DoorObjJson* state1 = nullptr;
-            const metatable::DoorObjJson* state2 = nullptr;
         };
 
         const metatable::BuildingJson* i = nullptr;
 
         std::vector<Door> doors;
+
+        void Init();
     };
 
     struct Drop
diff --git a/server/gameserver/metamgr.cc b/server/gameserver/metamgr.cc
index e8bc580..139542b 100755
--- a/server/gameserver/metamgr.cc
+++ b/server/gameserver/metamgr.cc
@@ -121,6 +121,7 @@ private:
                 MetaData::Building& item = a8::FastAppend(building_list);
                 item.i = &meta;
                 meta.set__building_id(building_id++);
+                item.Init();
                 building_hash[item.i->_building_id()] = &item;
             }
         }
diff --git a/server/gameserver/obstacle.cc b/server/gameserver/obstacle.cc
index abd5e28..f6b5347 100644
--- a/server/gameserver/obstacle.cc
+++ b/server/gameserver/obstacle.cc
@@ -5,6 +5,7 @@
 #include "movement.h"
 #include "room.h"
 #include "collider.h"
+#include "building.h"
 
 Obstacle::Obstacle():Entity()
 {
@@ -58,6 +59,27 @@ void Obstacle::RecalcSelfCollider()
             self_collider_->rad = 32 / 2.0;
         }
         break;
+    case 61018:
+        {
+            if (is_door) {
+                //门
+                if (!self_collider2_) {
+                    self_collider2_ = new AabbCollider();
+                    self_collider2_->owner = this;
+                    colliders.push_back(self_collider2_);
+                }
+                if (door_state == DoorStateClose) {
+                    self_collider2_->_min = Vector2D(0.0f - door_state0->width() / 2.0f,
+                                                     0.0f - door_state0->height() / 2.0f);
+                    self_collider2_->_max = Vector2D(door_state0->width() / 2.0f, door_state0->height() / 2.0f);
+                } else {
+                    self_collider2_->_min = Vector2D(0.0f - door_state1->width() / 2.0f,
+                                                     0.0f - door_state1->height() / 2.0f);
+                    self_collider2_->_max = Vector2D(door_state1->width(), door_state1->height());
+                }
+            }
+        }
+        break;
     }
 }
 
@@ -82,4 +104,20 @@ void Obstacle::FillMFObjectFull(cs::MFObjectFull* full_data)
     p->set_health(health);
     p->set_dead(dead);
     p->set_dead_at_thisframe(dead ? dead_frameno < room->frame_no : false);
+
+    p->set_is_door(is_door);
+    if (is_door) {
+        p->set_door_id(door_id);
+        p->set_door_old_state((int)door_state);
+        p->set_door_new_state((int)door_state);
+        p->set_door_house_uniid(door_house_uniid);
+        p->set_door_house_id(building->meta->i->_building_id());
+        if (door_state == DoorStateClose) {
+            p->set_door_width(door_state0->width());
+            p->set_door_height(door_state0->height());
+        } else {
+            p->set_door_width(door_state1->width());
+            p->set_door_height(door_state1->height());
+        }
+    }
 }
diff --git a/server/gameserver/obstacle.h b/server/gameserver/obstacle.h
index 1fca18f..1b07e73 100644
--- a/server/gameserver/obstacle.h
+++ b/server/gameserver/obstacle.h
@@ -7,9 +7,16 @@ namespace MetaData
     struct Player;
     struct Equip;
     struct MapThing;
+    struct Building;
+}
+
+namespace metatable
+{
+    class DoorObjJson;
 }
 
 class Human;
+class Building;
 class CircleCollider;
 class AabbCollider;
 class Obstacle : public Entity
@@ -20,6 +27,14 @@ class Obstacle : public Entity
     bool dead = false;
     long long dead_frameno = 0;
 
+    bool is_door = false;
+    int door_id = 0;
+    DoorState_e door_state = DoorStateClose;
+    Building* building = nullptr;
+    int door_house_uniid = 0;
+    const metatable::DoorObjJson* door_state0 = nullptr;
+    const metatable::DoorObjJson* door_state1 = nullptr;
+
     Obstacle();
     virtual ~Obstacle() override;
     virtual void Initialize() override;
diff --git a/server/gameserver/player.cc b/server/gameserver/player.cc
index 5c285c1..3c8556d 100644
--- a/server/gameserver/player.cc
+++ b/server/gameserver/player.cc
@@ -9,6 +9,8 @@
 #include "metamgr.h"
 #include "movement.h"
 #include "bullet.h"
+#include "obstacle.h"
+#include "building.h"
 
 const int F_del_objids = 2;
 const int F_full_objects = 3;
@@ -61,6 +63,9 @@ void Player::Update(int delta_time)
         if (shot_start || shot_hold) {
             UpdateShot();
         }
+        if (interaction_objids.size() > 0) {
+            ProcInteraction();
+        }
         MakeUpdateMsg();
         SendNotifyMsg(*update_msg);
         {
@@ -147,6 +152,50 @@ void Player::Shot()
     }
 }
 
+void Player::ProcInteraction()
+{
+    for (auto obj_id : interaction_objids) {
+        Entity* entity = room->GetEntityByUniId(obj_id);
+        if (entity) {
+            switch (entity->entity_type) {
+            case ET_Obstacle:
+                {
+                    ObstacleInteraction((Obstacle*)entity);
+                }
+                break;
+            case ET_Loot:
+                {
+
+                }
+                break;
+            default:
+                break;
+            }
+        }
+    }
+    interaction_objids.Clear();
+}
+
+void Player::ObstacleInteraction(Obstacle* entity)
+{
+    if (entity->is_door) {
+        if (entity->door_state == DoorStateClose) {
+            entity->door_state = DoorStateOpen;
+            entity->pos = Vector2D(entity->building->pos.x + entity->door_state1->x() - entity->building->meta->i->tilewidth() / 2.0,
+                                   entity->building->pos.y + entity->door_state1->y() - entity->building->meta->i->tileheight() / 2.0);
+        } else {
+            entity->door_state = DoorStateClose;
+            entity->pos = Vector2D(entity->building->pos.x + entity->door_state0->x() - entity->building->meta->i->tilewidth() / 2.0,
+                                   entity->building->pos.y + entity->door_state0->y() - entity->building->meta->i->tileheight() / 2.0);
+        }
+        entity->RecalcSelfCollider();
+        for (auto& pair : room->human_hash_) {
+            pair.second->new_objects.insert(entity);
+            pair.second->part_objects.insert(entity);
+        }
+    }
+}
+
 void Player::_CMMove(f8::MsgHdr& hdr, const cs::CMMove& msg)
 {
     bool has_move_dir = msg.has_move_dir();
@@ -180,6 +229,10 @@ void Player::_CMMove(f8::MsgHdr& hdr, const cs::CMMove& msg)
     if (!shot_hold) {
         series_shot_frames = 0;
     }
+    if (msg.has_interaction()) {
+        interaction_objids = msg.interaction_objids();
+    }
+    last_seq_id = msg.seq();
 }
 
 void Player::_CMDropItem(f8::MsgHdr& hdr, const cs::CMDropItem& msg)
@@ -222,6 +275,7 @@ void Player::MakeUpdateMsg()
 {
     update_msg->Clear();
     {
+        update_msg->set_ack(last_seq_id);
         for (auto& obj_uniid : room->frame_data.deleted_objects) {
             update_msg->add_del_objids(obj_uniid);
         }
diff --git a/server/gameserver/player.h b/server/gameserver/player.h
index 401394d..aa82429 100644
--- a/server/gameserver/player.h
+++ b/server/gameserver/player.h
@@ -14,6 +14,7 @@ namespace cs
 }
 
 class Room;
+class Obstacle;
 class Player : public Human
 {
  public:
@@ -28,12 +29,14 @@ class Player : public Human
     bool use_touch = false;
     std::string avatar_url;
 
+    int last_seq_id = 0;
     bool moving = false;
     int moved_frames = 0;
 
     bool shot_start = false;
     bool shot_hold = false;
     int series_shot_frames = 0;
+    ::google::protobuf::RepeatedField< ::google::protobuf::int32 > interaction_objids;
 
     template <typename T>
     void SendNotifyMsg(T& msg)
@@ -48,6 +51,8 @@ class Player : public Human
     void UpdateMove();
     void UpdateShot();
     void Shot();
+    void ProcInteraction();
+    void ObstacleInteraction(Obstacle* entity);
 
     void _CMMove(f8::MsgHdr& hdr, const cs::CMMove& msg);
     void _CMDropItem(f8::MsgHdr& hdr, const cs::CMDropItem& msg);
diff --git a/server/tools/protobuild/cs_proto.proto b/server/tools/protobuild/cs_proto.proto
index 7811198..c40e4e0 100755
--- a/server/tools/protobuild/cs_proto.proto
+++ b/server/tools/protobuild/cs_proto.proto
@@ -176,6 +176,9 @@ message MFObstacleFull
     optional int32 door_old_state = 23; //门前一个状态
     optional int32 door_new_state = 24; //门当前状态
     optional int32 door_house_uniid = 25; //门所属房间唯一id
+    optional int32 door_house_id = 26; //门所属房间id
+    optional float door_width = 27; //门宽度
+    optional float door_height = 28; //门高度
 
 }
 
@@ -582,7 +585,7 @@ message SMUpdate
     repeated MFShot shots = 21; //射击
     repeated MFExplosion explosions = 22; //爆炸
     repeated MFEmote emotes = 23; //表情
-    optional int32 ack = 24;
+    optional int32 ack = 24; //服务器最后处理的req id
 
     optional uint32 data_flags32 = 256;
 }