diff --git a/server/gameserver/entity.h b/server/gameserver/entity.h
index c7b8347..e1486f4 100644
--- a/server/gameserver/entity.h
+++ b/server/gameserver/entity.h
@@ -51,6 +51,7 @@ class Entity
     void BroadcastDeleteState();
     void AddCollider(ColliderComponent* collider);
     a8::Vec2 GetPos() { return pos_; };
+    bool IsPermanent() { return is_permanent;};
     void SetPos(a8::Vec2 pos)
     {
         #if 0
diff --git a/server/gameserver/obstacle.cc b/server/gameserver/obstacle.cc
index 1f68563..0fbf6d5 100644
--- a/server/gameserver/obstacle.cc
+++ b/server/gameserver/obstacle.cc
@@ -244,3 +244,51 @@ void Obstacle::Explosion(Bullet* bullet)
        self_collider_->rad = old_rad;
    }
 }
+
+void Obstacle::SetDoorInfo(Building* building, int door_idx)
+{
+    MetaData::Building::Door* door_meta = &building->meta->doors[door_idx];
+    building = building;
+    is_door = true;
+    door_id = door_meta->door_id;
+    door_state = DoorStateClose;
+    building = building;
+    door_house_uniid = building->entity_uniid;
+    door_state0 = door_meta->state0;
+    door_state1 = door_meta->state1;
+}
+
+bool Obstacle::IsDoor()
+{
+    return is_door;
+}
+
+DoorState_e Obstacle::GetDoorState()
+{
+    return door_state;
+}
+
+void Obstacle::SetDoorState(DoorState_e state)
+{
+    door_state = state;
+}
+
+Building* Obstacle::GetBuilding()
+{
+    return building;
+}
+
+const metatable::DoorObjJson* Obstacle::GetDoorState0()
+{
+    return door_state0;
+}
+
+const metatable::DoorObjJson* Obstacle::GetDoorState1()
+{
+    return door_state1;
+}
+
+void Obstacle::IncDoorOpenTimes()
+{
+    ++door_open_times;
+}
diff --git a/server/gameserver/obstacle.h b/server/gameserver/obstacle.h
index d2c9fdd..5bd99e0 100644
--- a/server/gameserver/obstacle.h
+++ b/server/gameserver/obstacle.h
@@ -26,15 +26,6 @@ class Obstacle : public Entity
     MetaData::MapThing* meta = nullptr;
     float health = 0.0f;
 
-    bool is_door = false;
-    int door_id = 0;
-    int door_open_times = 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;
@@ -44,9 +35,27 @@ class Obstacle : public Entity
     virtual void GetAabbBox(AabbCollider& aabb_box) override;
     virtual void GetCircleBox(CircleCollider& circle_box) override;
     void Explosion(Bullet* bullet);
+    void SetDoorInfo(Building* building, int door_idx);
+    bool IsDoor();
+    DoorState_e GetDoorState();
+    void SetDoorState(DoorState_e state);
+    Building* GetBuilding();
+    const metatable::DoorObjJson* GetDoorState0();
+    const metatable::DoorObjJson* GetDoorState1();
+    void IncDoorOpenTimes();
 
 private:
     CircleCollider* self_collider_ = nullptr;
     AabbCollider* self_collider2_ = nullptr;
 
+    bool is_door = false;
+    int door_id = 0;
+    int door_open_times = 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;
+
 };
+
diff --git a/server/gameserver/player.cc b/server/gameserver/player.cc
index 42578f0..362dc62 100644
--- a/server/gameserver/player.cc
+++ b/server/gameserver/player.cc
@@ -471,17 +471,19 @@ void Player::ProcInteraction()
 
 void Player::ObstacleInteraction(Obstacle* entity)
 {
-    if (entity->is_door) {
-        if (entity->door_state == DoorStateClose) {
-            entity->door_state = DoorStateOpen;
-            entity->SetPos(a8::Vec2(entity->building->GetX() + entity->door_state1->x() - entity->building->meta->i->tilewidth() / 2.0,
-                                    entity->building->GetY() + entity->door_state1->y() - entity->building->meta->i->tileheight() / 2.0));
+    if (entity->IsDoor()) {
+        if (entity->GetDoorState() == DoorStateClose) {
+            entity->SetDoorState(DoorStateOpen);
+            float x = entity->GetBuilding()->GetX() + entity->GetDoorState1()->x() - entity->GetBuilding()->meta->i->tilewidth() / 2.0;
+            float y = entity->GetBuilding()->GetY() + entity->GetDoorState1()->y() - entity->GetBuilding()->meta->i->tileheight() / 2.0;
+            entity->SetPos(a8::Vec2(x, y));
         } else {
-            entity->door_state = DoorStateClose;
-            entity->SetPos(a8::Vec2(entity->building->GetX() + entity->door_state0->x() - entity->building->meta->i->tilewidth() / 2.0,
-                                    entity->building->GetY() + entity->door_state0->y() - entity->building->meta->i->tileheight() / 2.0));
+            entity->SetDoorState(DoorStateClose);
+            float x = entity->GetBuilding()->GetX() + entity->GetDoorState0()->x() - entity->GetBuilding()->meta->i->tilewidth() / 2.0;
+            float y = entity->GetBuilding()->GetY() + entity->GetDoorState0()->y() - entity->GetBuilding()->meta->i->tileheight() / 2.0;
+            entity->SetPos(a8::Vec2(x, y));
         }
-        ++entity->door_open_times;
+        entity->IncDoorOpenTimes();
         entity->RecalcSelfCollider();
         room->TouchHumanList(a8::XParams(),
                              [entity] (Human* hum, a8::XParams& param) -> bool
diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index cc5e15f..0adf8ce 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -1166,7 +1166,6 @@ Obstacle* Room::InternalCreateObstacle(int id, float x, float y,
         Obstacle* entity = new Obstacle();
         entity->room = this;
         entity->meta = thing;
-        entity->building = nullptr;
         entity->entity_uniid = AllocUniid();
         entity->SetPos(a8::Vec2(x, y));
         entity->Initialize();
diff --git a/server/gameserver/roommgr.cc b/server/gameserver/roommgr.cc
index 4bcada0..27314df 100644
--- a/server/gameserver/roommgr.cc
+++ b/server/gameserver/roommgr.cc
@@ -442,16 +442,9 @@ void RoomMgr::CreateBuilding(int thing_id, float building_x, float building_y)
             float x = building->GetX() + door_meta->state0->x() - building->meta->i->tilewidth() / 2.0;
             float y = building->GetY() + door_meta->state0->y() - building->meta->i->tileheight() / 2.0;
             InternalCreateObstacle(DOOR_THING_ID, x, y,
-                                   [building, door_meta] (Obstacle* entity)
+                                   [building, door_idx] (Obstacle* entity)
                                    {
-                                       entity->building = building;
-                                       entity->is_door = true;
-                                       entity->door_id = door_meta->door_id;
-                                       entity->door_state = DoorStateClose;
-                                       entity->building = building;
-                                       entity->door_house_uniid = building->entity_uniid;
-                                       entity->door_state0 = door_meta->state0;
-                                       entity->door_state1 = door_meta->state1;
+                                       entity->SetDoorInfo(building, door_idx);
                                    });
         }
     }
@@ -465,7 +458,9 @@ void RoomMgr::CreateBuilding(int thing_id, float building_x, float building_y)
                     InternalCreateObstacle(pair.key(), x, y,
                                            [building] (Obstacle* entity)
                                            {
+                                               #if 0
                                                entity->building = building;
+                                               #endif
                                            });
                     break;
                 }