From 794857209daca052c3f4e9d07314faecf7099626 Mon Sep 17 00:00:00 2001
From: Sergey Lapin <slapinid@gmail.com>
Date: Wed, 2 Oct 2024 20:49:41 +0300
Subject: [PATCH] Made accessor for lines

---
 .vscode/settings.json                    |   3 +-
 src/modules/stream/base_data.cpp         |  32 +++
 src/modules/stream/base_data.h           |  13 +
 src/modules/stream/buildings_data.cpp    | 291 +++++++++++------------
 src/modules/stream/buildings_data.h      |  11 -
 src/modules/stream/road_lines_data.cpp   | 251 ++++++++++++-------
 src/modules/stream/road_lines_data.h     |  20 +-
 src/modules/stream/road_lines_editor.cpp |  69 +++---
 src/modules/stream/road_processing.cpp   |   8 +-
 src/modules/stream/stream.cpp            |  27 +--
 10 files changed, 417 insertions(+), 308 deletions(-)
 create mode 100644 src/modules/stream/base_data.cpp
 create mode 100644 src/modules/stream/base_data.h

diff --git a/.vscode/settings.json b/.vscode/settings.json
index 309c91b..c5771ff 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -67,7 +67,8 @@
         "cinttypes": "cpp",
         "typeinfo": "cpp",
         "variant": "cpp",
-        "format": "cpp"
+        "format": "cpp",
+        "future": "cpp"
     },
     "cmake.ignoreCMakeListsMissing": true
 }
\ No newline at end of file
diff --git a/src/modules/stream/base_data.cpp b/src/modules/stream/base_data.cpp
new file mode 100644
index 0000000..3d7ec1b
--- /dev/null
+++ b/src/modules/stream/base_data.cpp
@@ -0,0 +1,32 @@
+#include <core/os/memory.h>
+#include "base_data.h"
+
+static BaseData *base_data = nullptr;
+
+BaseData::BaseData()
+{
+}
+
+flecs::world &BaseData::get()
+{
+	return ecs;
+}
+
+BaseData::~BaseData()
+{
+}
+
+BaseData *BaseData::get_singleton()
+{
+	if (!base_data)
+		base_data = memnew(BaseData);
+	return base_data;
+}
+
+void BaseData::cleanup()
+{
+	if (base_data) {
+		memdelete(base_data);
+		base_data = nullptr;
+	}
+}
diff --git a/src/modules/stream/base_data.h b/src/modules/stream/base_data.h
new file mode 100644
index 0000000..3a59a81
--- /dev/null
+++ b/src/modules/stream/base_data.h
@@ -0,0 +1,13 @@
+#include "flecs/flecs.h"
+class BaseData {
+	flecs::world ecs;
+
+protected:
+	BaseData();
+
+public:
+	flecs::world &get();
+	virtual ~BaseData();
+	static BaseData *get_singleton();
+	void cleanup();
+};
diff --git a/src/modules/stream/buildings_data.cpp b/src/modules/stream/buildings_data.cpp
index 4e5765a..6f2d04f 100644
--- a/src/modules/stream/buildings_data.cpp
+++ b/src/modules/stream/buildings_data.cpp
@@ -10,24 +10,42 @@
 #include <scene/3d/spatial.h>
 #include <scene/3d/mesh_instance.h>
 #include "from_string.h"
-#include "flecs/flecs.h"
+#include "base_data.h"
 #include "buildings_data.h"
 
 BuildingsData *BuildingsData::singleton;
 
 static ConfigFile config;
-static flecs::world ecs;
 struct scene_data {
 	Ref<PackedScene> packed_scene;
 	String path;
 	Ref<ResourceInteractiveLoader> loader;
 };
 
+static flecs::world &ecs()
+{
+	return BaseData::get_singleton()->get();
+}
+
+static flecs::entity lookup(const String &key)
+{
+	return ecs().lookup(key.ascii().ptr());
+}
+
+static flecs::entity lookup(const char *key)
+{
+	return ecs().lookup(key);
+}
+
 struct CBuildingInstance {
 	String key;
 	Node *node;
 };
 
+struct CBuildingData {
+	struct BuildingsData::building building;
+};
+
 struct CSceneData {
 	struct scene_data sd;
 };
@@ -38,6 +56,15 @@ BuildingsData::BuildingsData()
 	load_data();
 	fill_door_locations();
 	build_building_aabbs();
+	ecs().observer<CBuildingInstance>()
+		.event(flecs::OnRemove)
+		.each([](flecs::entity e, CBuildingInstance &bi) {
+			if (bi.node) {
+				bi.node->queue_delete();
+				bi.node = nullptr;
+				print_line("instance destroyed for " + bi.key);
+			}
+		});
 }
 
 BuildingsData::~BuildingsData()
@@ -99,28 +126,27 @@ void BuildingsData::update_building_transform(const String &key,
 
 bool BuildingsData::has_building(const String &key)
 {
-	int index = get_building_by_key(key);
-	if (index >= 0)
-		return true;
-	return false;
+	String ename = "base:" + key;
+	flecs::entity e = lookup(ename.ascii().ptr());
+	return e.is_valid();
 }
 
 String BuildingsData::get_closest_building(const Transform &xform)
 {
-	int i;
 	float dst = Math_INF;
 	String rkey;
-	int id = -1;
-	for (i = 0; i < (int)buildings_.size(); i++) {
-		Vector3 o = xform.origin;
-		Vector3 m = buildings_[i].xform.origin;
-		float mdst = o.distance_squared_to(m);
-		if (dst > mdst) {
-			dst = mdst;
-			id = i;
-		}
-	}
-	return buildings_[id].key;
+	// int id = -1;
+	ecs().each(
+		[xform, &rkey, &dst](flecs::entity e, const CBuildingData &d) {
+			Vector3 o = xform.origin;
+			Vector3 m = d.building.xform.origin;
+			float mdst = o.distance_squared_to(m);
+			if (dst > mdst) {
+				dst = mdst;
+				rkey = d.building.key;
+			}
+		});
+	return rkey;
 }
 
 void BuildingsData::cleanup()
@@ -132,19 +158,6 @@ void BuildingsData::cleanup()
 	}
 }
 
-int BuildingsData::get_building_by_key(const String &key) const
-{
-	int i, index = -1;
-	uint64_t key_hash = key.hash64();
-	for (i = 0; i < (int)buildings_.size(); i++) {
-		if (key_hash == buildings_[i].key_hash) {
-			index = i;
-			break;
-		}
-	}
-	return index;
-}
-
 void BuildingsData::read_buildings_json(const String &buildings_path)
 {
 	String buildings_json = FileAccess::get_file_as_string(buildings_path);
@@ -172,30 +185,17 @@ void BuildingsData::read_buildings_json(const String &buildings_path)
 			entry["xform"] = key;
 		if (!entry.has("key")) // legacy
 			entry["key"] = key;
-		building::from_dict(&b, json[key]);
-		buildings_.push_back(b);
+		create_building(entry);
+		//		building::from_dict(&b, json[key]);
+		//		buildings_.push_back(b);
 		e = e->next();
 	}
-#if 0
-	e = keys.front();
-	while (e) {
-		String key = e->get();
-		/* Transform */
-		print_line("key: " + key);
-		String id = json[key].get("id");
-		print_line("id: " + id);
-		String aabb = json[key].get("aabb");
-		print_line("aabb: " + aabb);
-		e = e->next();
-	}
-#endif
 	filter_generated_stuff();
-	print_line("entries count: " + itos(buildings_.size()));
+	print_line("entries count: " + itos(get_building_count()));
 }
 
 void BuildingsData::save_buildings_json(const String &buildings_path)
 {
-	int i;
 	String buildings_json = FileAccess::get_file_as_string(buildings_path);
 	String backup_path = buildings_path + ".bak";
 	String store_path = buildings_path;
@@ -204,17 +204,19 @@ void BuildingsData::save_buildings_json(const String &buildings_path)
 	fa->store_string(buildings_json);
 	fa->close();
 	Dictionary json;
-	for (i = 0; i < (int)buildings_.size(); i++) {
-		String key = buildings_[i].key;
-		Dictionary dict = buildings_[i].to_dict();
-		dict["index"] = i;
+	int index = 0;
+	ecs().each([&index, &json](const CBuildingData &b) {
+		String key = b.building.key;
+		Dictionary dict = b.building.to_dict();
+		dict["index"] = index;
 		json[key] = dict;
-	}
+		index++;
+	});
 	String json_string = JSON::print(json, "\t", false);
 	fa = FileAccess::open(store_path, FileAccess::WRITE);
 	fa->store_string(json_string);
 	fa->close();
-	print_line("entries count: " + itos(buildings_.size()));
+	print_line("entries count: " + itos(get_building_count()));
 }
 
 void BuildingsData::building::from_dict(building *b, const Dictionary &dict)
@@ -294,16 +296,16 @@ void BuildingsData::filter_generated_stuff()
 	Error result = config.load("res://config/stream.conf");
 	ERR_FAIL_COND_MSG(result != OK, "Failed to load config");
 	Array gen_prefixes = config.get_value("lines", "gen_prefixes");
-	int i, j;
-	for (i = 0; i < (int)buildings_.size(); i++) {
+	ecs().each([gen_prefixes](CBuildingData &b) {
+		int j;
 		for (j = 0; j < (int)gen_prefixes.size(); j++) {
 			String prefix = gen_prefixes[j];
-			if (buildings_[i].id.begins_with(prefix)) {
-				buildings_[i].generated = true;
+			if (b.building.id.begins_with(prefix)) {
+				b.building.generated = true;
 				break;
 			}
 		}
-	}
+	});
 }
 
 void BuildingsData::load_data()
@@ -334,16 +336,27 @@ void BuildingsData::checkpoint()
 {
 	struct checkpoint_data cp;
 	cp.building_data = building_data;
-	cp.buildings = buildings_;
+	cp.buildings.clear();
+	ecs().each([&cp](flecs::entity e, const CBuildingData &b) {
+		cp.buildings.push_back(b.building);
+	});
 	undo_log.push_back(cp);
 	while ((int)undo_log.size() > undo_log_size)
 		undo_log.erase(undo_log.begin());
 }
 void BuildingsData::undo()
 {
+	int i;
 	struct checkpoint_data cp = *undo_log.end();
 	building_data = cp.building_data;
-	buildings_ = cp.buildings;
+	ecs().each([&cp](flecs::entity e, const CBuildingData &b) {
+		e.destruct();
+	});
+	for (i = 0; i < (int)cp.buildings.size(); i++) {
+		String ename = "base:" + cp.buildings[i].key;
+		flecs::entity e = ecs().entity(ename.ascii().ptr());
+		e.set<CBuildingData>({ cp.buildings[i] });
+	}
 }
 
 void BuildingsData::fill_door_locations()
@@ -424,43 +437,38 @@ func fill_door_locations():
 
 void BuildingsData::get_scene_keys_list(List<String> *keys) const
 {
-	ecs.each([keys](flecs::entity e, const CSceneData &d) {
+	ecs().each([keys](flecs::entity e, const CSceneData &d) {
 		keys->push_back(String(e.name()));
 	});
 }
 
 bool BuildingsData::has_scene(const String &key) const
 {
-	flecs::entity e = ecs.lookup(key.ascii().ptr());
+	flecs::entity e = ecs().lookup(key.ascii().ptr());
 	return e.is_valid();
 }
 
 void BuildingsData::remove_scene_item(const String &key, const String &bkey)
 {
-	flecs::entity e = ecs.lookup(key.ascii().ptr());
+	flecs::entity e = ecs().lookup(key.ascii().ptr());
 	assert(e.is_valid());
 	CSceneData *d = e.get_mut<CSceneData>();
 	assert(d);
 	flecs::query_builder<const CBuildingInstance> qb =
-		ecs.query_builder<const CBuildingInstance>().with(
+		ecs().query_builder<const CBuildingInstance>().with(
 			flecs::ChildOf, e);
 	flecs::query<const CBuildingInstance> q = qb.build();
 	uint64_t key_hash = bkey.hash64();
 	flecs::entity em = q.find([key_hash](const CBuildingInstance &bi) {
 		return bi.key.hash64() == key_hash;
 	});
-	if (em.is_valid()) {
-		CBuildingInstance *bi = em.get_mut<CBuildingInstance>();
-		if (bi->node)
-			bi->node->queue_delete();
-		bi->node = nullptr;
+	if (em.is_valid())
 		em.destruct();
-	}
 }
 
 void BuildingsData::add_scene_item(const String &key, const String &bkey)
 {
-	flecs::entity e = ecs.lookup(key.ascii().ptr());
+	flecs::entity e = ecs().lookup(key.ascii().ptr());
 	assert(e.is_valid());
 	CSceneData *d = e.get_mut<CSceneData>();
 	assert(d);
@@ -468,7 +476,7 @@ void BuildingsData::add_scene_item(const String &key, const String &bkey)
 	flecs::entity ce = e.lookup(ename.ascii().ptr());
 	if (ce.is_valid())
 		ce.destruct();
-	ce = ecs.entity(ename.ascii().ptr());
+	ce = ecs().entity(ename.ascii().ptr());
 	ce.child_of(e);
 	ce.set<CBuildingInstance>({ bkey, nullptr });
 	print_line("child name: " + String(ce.name()));
@@ -477,7 +485,7 @@ void BuildingsData::add_scene_item(const String &key, const String &bkey)
 void BuildingsData::create_scene_data(const String &key, const String &bkey)
 {
 	if (!has_scene(key)) {
-		flecs::entity e = ecs.entity(key.ascii().ptr());
+		flecs::entity e = ecs().entity(key.ascii().ptr());
 		String path = building_data[key];
 		print_line("Requesting " + (bkey) + " " + path);
 		struct scene_data sd;
@@ -490,7 +498,7 @@ void BuildingsData::create_scene_data(const String &key, const String &bkey)
 		flecs::entity ce = e.lookup(ename.ascii().ptr());
 		if (ce.is_valid())
 			ce.destruct();
-		ce = ecs.entity(ename.ascii().ptr());
+		ce = ecs().entity(ename.ascii().ptr());
 		ce.child_of(e);
 		ce.set<CBuildingInstance>({ bkey, nullptr });
 		print_line("child name: " + String(ce.name()));
@@ -499,7 +507,7 @@ void BuildingsData::create_scene_data(const String &key, const String &bkey)
 
 Ref<PackedScene> BuildingsData::scene_get_packed_scene(const String &key) const
 {
-	flecs::entity e = ecs.lookup(key.ascii().ptr());
+	flecs::entity e = ecs().lookup(key.ascii().ptr());
 	if (!e.is_valid())
 		return Ref<PackedScene>();
 	if (!e.get<CSceneData>())
@@ -512,7 +520,7 @@ Ref<PackedScene> BuildingsData::scene_get_packed_scene(const String &key) const
 
 int BuildingsData::scene_get_item_count(const String &key) const
 {
-	flecs::entity e = ecs.lookup(key.ascii().ptr());
+	flecs::entity e = ecs().lookup(key.ascii().ptr());
 	if (!e.is_valid())
 		return 0;
 	if (!e.get<CSceneData>())
@@ -522,7 +530,7 @@ int BuildingsData::scene_get_item_count(const String &key) const
 	assert(d);
 	// return d->sd.buildings.size();
 	flecs::query_builder<const CBuildingInstance> qb =
-		ecs.query_builder<const CBuildingInstance>().with(
+		ecs().query_builder<const CBuildingInstance>().with(
 			flecs::ChildOf, e);
 	flecs::query<const CBuildingInstance> q = qb.build();
 	int result;
@@ -538,7 +546,7 @@ int BuildingsData::scene_get_item_count(const String &key) const
 List<String> BuildingsData::scene_get_items(const String &key) const
 {
 	List<String> ret;
-	flecs::entity e = ecs.lookup(key.ascii().ptr());
+	flecs::entity e = ecs().lookup(key.ascii().ptr());
 	if (!e.is_valid())
 		return List<String>();
 	if (!e.get<CSceneData>())
@@ -547,7 +555,7 @@ List<String> BuildingsData::scene_get_items(const String &key) const
 	const CSceneData *d = e.get<CSceneData>();
 	assert(d);
 	flecs::query_builder<const CBuildingInstance> qb =
-		ecs.query_builder<const CBuildingInstance>().with(
+		ecs().query_builder<const CBuildingInstance>().with(
 			flecs::ChildOf, e);
 	flecs::query<const CBuildingInstance> q = qb.build();
 	q.each([&ret](flecs::entity me, const CBuildingInstance &ib) {
@@ -558,7 +566,7 @@ List<String> BuildingsData::scene_get_items(const String &key) const
 void BuildingsData::set_scene_item_node(const String &key, const String &bkey,
 					Node *node)
 {
-	flecs::entity e = ecs.lookup(key.ascii().ptr());
+	flecs::entity e = ecs().lookup(key.ascii().ptr());
 	assert(e.is_valid());
 	CSceneData *d = e.get_mut<CSceneData>();
 	assert(d);
@@ -572,7 +580,7 @@ void BuildingsData::set_scene_item_node(const String &key, const String &bkey,
 }
 bool BuildingsData::has_scene_item(const String &key, const String &bkey) const
 {
-	flecs::entity e = ecs.lookup(key.ascii().ptr());
+	flecs::entity e = ecs().lookup(key.ascii().ptr());
 	assert(e.is_valid());
 	CSceneData *d = e.get_mut<CSceneData>();
 	assert(d);
@@ -583,7 +591,7 @@ bool BuildingsData::has_scene_item(const String &key, const String &bkey) const
 Node *BuildingsData::get_scene_item_node(const String &key,
 					 const String &bkey) const
 {
-	flecs::entity e = ecs.lookup(key.ascii().ptr());
+	flecs::entity e = ecs().lookup(key.ascii().ptr());
 	assert(e.is_valid());
 	CSceneData *d = e.get_mut<CSceneData>();
 	assert(d);
@@ -595,52 +603,11 @@ Node *BuildingsData::get_scene_item_node(const String &key,
 	assert(bi->key == bkey);
 	return bi->node;
 }
-void BuildingsData::item_nodes_delete_node(const String &key)
-{
-	flecs::query_builder<const CBuildingInstance> qb =
-		ecs.query_builder<const CBuildingInstance>();
-	flecs::query<const CBuildingInstance> q = qb.build();
-	uint64_t key_hash = key.hash64();
-	flecs::entity e = q.find(
-		[key_hash](flecs::entity me, const CBuildingInstance &ib) {
-			return ib.key.hash64() == key_hash;
-		});
-	assert(e.is_valid());
-	CBuildingInstance *ib = e.get_mut<CBuildingInstance>();
-	if (ib->node)
-		ib->node->queue_delete();
-	ib->node = nullptr;
-}
-
-void BuildingsData::item_nodes_item_removed(const String &key)
-{
-	/* FIXME: pretty sure this is redundant */
-	flecs::query_builder<const CBuildingInstance> qb =
-		ecs.query_builder<const CBuildingInstance>();
-	flecs::query<const CBuildingInstance> q = qb.build();
-	uint64_t key_hash = key.hash64();
-	flecs::entity e = q.find([key_hash](const CBuildingInstance &bi) {
-		return bi.key.hash64() == key_hash;
-	});
-	if (!e.is_valid())
-		return;
-	CBuildingInstance *bi = e.get_mut<CBuildingInstance>();
-	assert(bi);
-	if (bi->node) {
-		bi->node->queue_delete();
-	}
-	bi->node = nullptr;
-}
-
-String BuildingsData::item_nodes_get_key(int item) const
-{
-	return buildings_[item].key;
-}
 
 Node *BuildingsData::item_nodes_get_node(const String &key) const
 {
 	flecs::query_builder<const CBuildingInstance> qb =
-		ecs.query_builder<const CBuildingInstance>();
+		ecs().query_builder<const CBuildingInstance>();
 	flecs::query<const CBuildingInstance> q = qb.build();
 	uint64_t key_hash = key.hash64();
 	flecs::entity e = q.find([key_hash](const CBuildingInstance &bi) {
@@ -655,7 +622,7 @@ Node *BuildingsData::item_nodes_get_node(const String &key) const
 Error BuildingsData::scene_loader_poll(const String &key)
 {
 	if (has_scene(key)) {
-		flecs::entity e = ecs.lookup(key.ascii().ptr());
+		flecs::entity e = ecs().lookup(key.ascii().ptr());
 		assert(e.is_valid());
 		CSceneData *d = e.get_mut<CSceneData>();
 		assert(d);
@@ -692,23 +659,35 @@ void BuildingsData::scene_update()
 
 int BuildingsData::get_building_count() const
 {
-	return buildings_.size();
+	flecs::query<const CBuildingData> q =
+		ecs().query<const CBuildingData>();
+	int result;
+	q.run([&result](flecs::iter &it) {
+		it.next();
+		result = it.count();
+		it.fini();
+	});
+	return result;
 }
 
 const struct BuildingsData::building &
 BuildingsData::get_building(const String &building_key) const
 {
-	int index = get_building_by_key(building_key);
-	assert(index >= 0 && index < get_building_count());
-	return buildings_[index];
+	String ename = "base:" + building_key;
+	print_line("get_building: " + ename);
+	flecs::entity e = lookup(ename);
+	assert(e.is_valid());
+	return e.get<CBuildingData>()->building;
 }
 
 struct BuildingsData::building &
 BuildingsData::get_building(const String &building_key)
 {
-	int index = get_building_by_key(building_key);
-	assert(index >= 0 && index < get_building_count());
-	return buildings_[index];
+	String ename = "base:" + building_key;
+	print_line("get_building: " + ename);
+	flecs::entity e = lookup(ename);
+	assert(e.is_valid());
+	return e.get_mut<CBuildingData>()->building;
 }
 
 String BuildingsData::create_building(const Dictionary &dict)
@@ -721,39 +700,37 @@ String BuildingsData::create_building(const Dictionary &dict)
 String BuildingsData::create_building(const struct building &building)
 {
 	assert(building.key.length() > 0);
-	buildings_.push_back(building);
+	String ename = "base:" + building.key;
+	print_line("create_building: " + ename);
+	flecs::entity e = ecs().lookup(ename.ascii().ptr());
+	assert(!e.is_valid());
+	e = ecs().entity(ename.ascii().ptr());
+	e.set<CBuildingData>({ building });
+	assert(e.is_valid());
+	print_line("create_building: " + ename + " created");
+
 	return building.key;
 }
 
-void BuildingsData::for_each_building(callme &c)
+void BuildingsData::for_each_building(struct callme &c)
 {
-	List<String> keys;
-	get_building_keys_list(&keys);
-	List<String>::Element *e = keys.front();
-	while (e) {
-		c(e->get());
-		e = e->next();
-	}
+	ecs().each([&c](const CBuildingData &b) { c(b.building.key); });
 }
 
 void BuildingsData::for_each_building(void (*func)(const String &key,
 						   void *data),
 				      void *data)
 {
-	List<String> keys;
-	get_building_keys_list(&keys);
-	List<String>::Element *e = keys.front();
-	while (e) {
-		func(e->get(), data);
-		e = e->next();
-	}
+	ecs().each([func, data](const CBuildingData &b) {
+		func(b.building.key, data);
+	});
 }
 
 void BuildingsData::get_building_keys_list(List<String> *keys)
 {
-	int i;
-	for (i = 0; i < get_building_count(); i++)
-		keys->push_back(buildings_[i].key);
+	ecs().each([keys](const CBuildingData &e) {
+		keys->push_back(e.building.key);
+	});
 }
 
 String BuildingsData::create_building(const building *building)
@@ -764,8 +741,12 @@ String BuildingsData::create_building(const building *building)
 
 bool BuildingsData::destroy_building(const String &key)
 {
-	int index = get_building_by_key(key);
-	assert(index >= 0 && index < get_building_count());
-	buildings_.erase(buildings_.begin() + index);
+	assert(key.length() > 0);
+	String ename = "base:" + key;
+	print_line("destroy_building: " + ename);
+	flecs::entity e = ecs().lookup(ename.ascii().ptr());
+	assert(e.is_valid());
+	e.destruct();
+	print_line("destroy_building: " + ename + " destroyed");
 	return true;
 }
diff --git a/src/modules/stream/buildings_data.h b/src/modules/stream/buildings_data.h
index 4a4c5dd..dd28f59 100644
--- a/src/modules/stream/buildings_data.h
+++ b/src/modules/stream/buildings_data.h
@@ -41,14 +41,9 @@ public:
 	Node *get_scene_item_node(const String &key, const String &bkey) const;
 
 public:
-	void item_nodes_delete_node(const String &key);
-	// bool item_nodes_exists(const String &key) const;
-	// void item_nodes_set_node(const String &key, Node *node);
-	void item_nodes_item_removed(const String &key);
 	Node *item_nodes_get_node(const String &key) const;
 
 private:
-	String item_nodes_get_key(int item) const;
 	Error scene_loader_poll(const String &key);
 
 public:
@@ -57,9 +52,6 @@ public:
 	HashMap<String, String> building_data;
 	HashMap<String, Vector<Transform> > building_doors;
 	HashMap<String, AABB> building_aabbs;
-	/* Data for each building in a world */
-private:
-	std::vector<struct building> buildings_;
 
 public:
 	struct building &get_building(const String &building_key);
@@ -138,8 +130,5 @@ public:
 	String get_closest_building(const Transform &xform);
 	static BuildingsData *get_singleton();
 	static void cleanup();
-
-private:
-	int get_building_by_key(const String &key) const;
 };
 #endif
\ No newline at end of file
diff --git a/src/modules/stream/road_lines_data.cpp b/src/modules/stream/road_lines_data.cpp
index a269147..e5fa95d 100644
--- a/src/modules/stream/road_lines_data.cpp
+++ b/src/modules/stream/road_lines_data.cpp
@@ -15,6 +15,54 @@
 #include "editor_event.h"
 #include "road_lines_data.h"
 
+class LinesAccessor {
+	HashMap<String, struct RoadLinesData::road_line> lines_;
+
+public:
+	inline const struct RoadLinesData::road_line &
+	get_line(const String &key) const
+	{
+		return lines_[key];
+	}
+	inline const struct RoadLinesData::road_line *
+	get_line_ptr(const String &key) const
+	{
+		return &lines_[key];
+	}
+	inline struct RoadLinesData::road_line &get_line(const String &key)
+	{
+		return lines_[key];
+	}
+	inline const struct RoadLinesData::road_line &
+	operator[](const String &key) const
+	{
+		return lines_[key];
+	}
+	inline struct RoadLinesData::road_line &operator[](const String &key)
+	{
+		return lines_[key];
+	}
+	inline bool has(const String &key)
+	{
+		return lines_.has(key);
+	}
+	void get_key_list(List<String> *keys)
+	{
+		lines_.get_key_list(keys);
+	}
+	const String &get_next(const String &key)
+	{
+		const String *r = lines_.next(&key);
+		return *r;
+	}
+	void erase(const String &key)
+	{
+		lines_.erase(key);
+	}
+};
+
+static LinesAccessor lines;
+
 ImmediateGeometry *RoadLinesData::debug_im = nullptr;
 static Ref<Material> debug_material;
 RoadLinesData::RoadLinesData()
@@ -22,6 +70,27 @@ RoadLinesData::RoadLinesData()
 	load_data();
 }
 RoadLinesData *RoadLinesData::singleton = nullptr;
+const struct RoadLinesData::road_line &
+RoadLinesData::get_line(const String &key) const
+{
+	return ::lines[key];
+}
+struct RoadLinesData::road_line &RoadLinesData::get_line(const String &key)
+{
+	return ::lines[key];
+}
+const RoadLinesData::road_line &RoadLinesData::lines(const String &key) const
+{
+	return ::lines[key];
+}
+RoadLinesData::road_line &RoadLinesData::lines(const String &key)
+{
+	return ::lines[key];
+}
+bool RoadLinesData::has_line(const String &key)
+{
+	return ::lines.has(key);
+}
 RoadLinesData *RoadLinesData::get_singleton()
 {
 	if (!singleton)
@@ -49,7 +118,7 @@ String RoadLinesData::get_road_lines_path()
 void RoadLinesData::get_road_lines_key_list(List<String> *keys)
 {
 	List<String> line_keys;
-	lines.get_key_list(&line_keys);
+	::lines.get_key_list(&line_keys);
 	List<String>::Element *e = line_keys.front();
 	keys->clear();
 	while (e) {
@@ -59,6 +128,18 @@ void RoadLinesData::get_road_lines_key_list(List<String> *keys)
 		e = e->next();
 	}
 }
+void RoadLinesData::get_lines_key_list(List<String> *keys)
+{
+	::lines.get_key_list(keys);
+}
+const String &RoadLinesData::get_next_line(const String &key)
+{
+	return ::lines.get_next(key);
+}
+void RoadLinesData::erase_line(const String &key)
+{
+	return ::lines.erase(key);
+}
 void RoadLinesData::load_data()
 {
 	int i;
@@ -109,7 +190,7 @@ void RoadLinesData::load_data()
 		}
 		// TODO: wtf is flags?
 		rline.lanes = lanes;
-		lines[key] = rline;
+		lines(key) = rline;
 		e = e->next();
 	}
 }
@@ -124,26 +205,26 @@ void RoadLinesData::save_data()
 		FileAccess::get_file_as_string(road_lines_path);
 	Dictionary output;
 	List<String> keys;
-	lines.get_key_list(&keys);
+	::lines.get_key_list(&keys);
 	List<String>::Element *e = keys.front();
 	while (e) {
 		Dictionary pvalues;
 		Array points, indices;
-		points.resize(lines[e->get()].points.size());
-		for (i = 0; i < (int)lines[e->get()].points.size(); i++)
-			points[i] = to_string(lines[e->get()].points[i]);
-		indices.resize(lines[e->get()].indices.size());
-		for (i = 0; i < (int)lines[e->get()].indices.size(); i++)
-			indices[i] = lines[e->get()].indices[i];
+		points.resize(lines(e->get()).points.size());
+		for (i = 0; i < (int)lines(e->get()).points.size(); i++)
+			points[i] = to_string(lines(e->get()).points[i]);
+		indices.resize(lines(e->get()).indices.size());
+		for (i = 0; i < (int)lines(e->get()).indices.size(); i++)
+			indices[i] = lines(e->get()).indices[i];
 		pvalues["points"] = points;
 		// pvalues["indices"] = indices;
-		pvalues["metadata"] = lines[e->get()].metadata;
-		pvalues["lanes"] = lines[e->get()].lanes;
-		pvalues["pattern"] = lines[e->get()].pattern;
+		pvalues["metadata"] = lines(e->get()).metadata;
+		pvalues["lanes"] = lines(e->get()).lanes;
+		pvalues["pattern"] = ::lines[e->get()].pattern;
 		Array buildings;
-		for (i = 0; i < (int)lines[e->get()].buildings.size(); i++)
+		for (i = 0; i < (int)::lines[e->get()].buildings.size(); i++)
 			buildings.push_back(
-				lines[e->get()].buildings[i].to_dict());
+				::lines[e->get()].buildings[i].to_dict());
 		pvalues["buildings"] = buildings;
 		output[e->get()] = pvalues;
 		e = e->next();
@@ -224,14 +305,14 @@ void RoadLinesData::index_lines(
 	List<String>::Element *e = keys.front();
 	while (e) {
 		String rkey = e->get();
-		struct RoadLinesData::road_line &pt = lines[rkey];
+		struct RoadLinesData::road_line &pt = ::lines[rkey];
 		pt.indices.clear();
 		e = e->next();
 	}
 	e = keys.front();
 	while (e) {
 		String rkey = e->get();
-		struct RoadLinesData::road_line &pt = lines[rkey];
+		struct RoadLinesData::road_line &pt = ::lines[rkey];
 		road_lines_curve_index(pt, road_lines_nodes_hash,
 				       road_lines_nodes);
 		e = e->next();
@@ -240,14 +321,14 @@ void RoadLinesData::index_lines(
 static inline int get_segment_index(const String &road, int pos)
 {
 	RoadLinesData *rld = RoadLinesData::get_singleton();
-	int idx = rld->lines[road].indices[pos];
+	int idx = rld->get_line(road).indices[pos];
 	return idx;
 }
 void RoadLinesData::create_segments(const String &road,
 				    std::vector<int> &segments)
 {
 	int i;
-	for (i = 0; i < (int)lines[road].indices.size() - 1; i++) {
+	for (i = 0; i < (int)::lines[road].indices.size() - 1; i++) {
 		segments.push_back(i);
 		segments.push_back(i + 1);
 	}
@@ -297,8 +378,8 @@ void RoadLinesData::insert_close_points(std::vector<Vector3> &road_lines_nodes,
 				    distance_squared) {
 					/* split segment and replace road
 					   point with a point on segment */
-					lines[rkey].indices.insert(
-						lines[rkey].indices.begin() +
+					::lines[rkey].indices.insert(
+						::lines[rkey].indices.begin() +
 							idx,
 						idx3);
 					road_lines_nodes[idx3] = closest;
@@ -345,22 +426,23 @@ void RoadLinesData::update_road_lines_nodes(
 		std::tuple<String, String> data = kcmp[it->first];
 		const String &k = std::get<0>(data);
 		const String &r = std::get<1>(data);
-		if (lines[k].indices.size() < 2)
+		if (::lines[k].indices.size() < 2)
 			continue;
-		if (lines[r].indices.size() < 2)
+		if (::lines[r].indices.size() < 2)
 			continue;
-		for (i = 0; i < (int)lines[k].indices.size() - 1; i++) {
-			for (j = 0; j < (int)lines[k].indices.size() - 1; j++) {
+		for (i = 0; i < (int)::lines[k].indices.size() - 1; i++) {
+			for (j = 0; j < (int)::lines[k].indices.size() - 1;
+			     j++) {
 				uint32_t key = k.hash() ^ i ^ r.hash() ^ j ^
 					       2147483137;
 				uint32_t key2 = r.hash() ^ j ^ k.hash() ^ i ^
 						2147463167;
 				if (checks.find(key) == checks.end() &&
 				    checks.find(key2) == checks.end()) {
-					int idx_a1 = lines[k].indices[i];
-					int idx_a2 = lines[k].indices[i + 1];
-					int idx_b1 = lines[k].indices[j];
-					int idx_b2 = lines[k].indices[j + 1];
+					int idx_a1 = ::lines[k].indices[i];
+					int idx_a2 = ::lines[k].indices[i + 1];
+					int idx_b1 = ::lines[k].indices[j];
+					int idx_b2 = ::lines[k].indices[j + 1];
 					std::vector<int> cmp1 = { idx_a1,
 								  idx_a2 };
 					if (std::find(cmp1.begin(), cmp1.end(),
@@ -426,16 +508,16 @@ void RoadLinesData::update_road_lines_nodes(
 			int nidx = road_lines_nodes.size();
 			road_lines_nodes.push_back(pxt);
 			//				int il = (int)road_lines[k].indices.size();
-			assert(std::find(lines[k].indices.begin(),
-					 lines[k].indices.end(),
-					 nidx) == lines[k].indices.end());
-			assert(std::find(lines[r].indices.begin(),
-					 lines[r].indices.end(),
-					 nidx) == lines[r].indices.end());
-			lines[k].indices.insert(
-				lines[k].indices.begin() + i + 1, nidx);
-			lines[r].indices.insert(
-				lines[k].indices.begin() + j + 1, nidx);
+			assert(std::find(::lines[k].indices.begin(),
+					 ::lines[k].indices.end(),
+					 nidx) == ::lines[k].indices.end());
+			assert(std::find(::lines[r].indices.begin(),
+					 ::lines[r].indices.end(),
+					 nidx) == ::lines[r].indices.end());
+			::lines[k].indices.insert(
+				::lines[k].indices.begin() + i + 1, nidx);
+			::lines[r].indices.insert(
+				::lines[k].indices.begin() + j + 1, nidx);
 		}
 	}
 }
@@ -447,7 +529,7 @@ void RoadLinesData::dump_road_lines(const std::vector<Vector3> &road_lines_nodes
 	List<String>::Element *e = keys.front();
 	while (e) {
 		String rkey = e->get();
-		struct RoadLinesData::road_line &pt = lines[rkey];
+		struct RoadLinesData::road_line &pt = ::lines[rkey];
 		String outline = rkey + ": ";
 		for (i = 0; i < (int)pt.indices.size(); i++) {
 			outline += " " + itos(pt.indices[i]);
@@ -501,20 +583,20 @@ int RoadLinesData::get_debug_flags() const
 void RoadLinesData::update_line_segments(const String &line)
 {
 	int i;
-	lines[line].segments.clear();
-	lines[line].segments.resize(lines[line].points.size() - 1);
+	::lines[line].segments.clear();
+	::lines[line].segments.resize(::lines[line].points.size() - 1);
 	float offset = 0.0f;
-	for (i = 0; i < (int)lines[line].points.size() - 1; i++) {
+	for (i = 0; i < (int)::lines[line].points.size() - 1; i++) {
 		struct line_segment segment;
-		segment.p1 = lines[line].points[i].origin;
-		segment.p2 = lines[line].points[i + 1].origin;
+		segment.p1 = ::lines[line].points[i].origin;
+		segment.p2 = ::lines[line].points[i + 1].origin;
 		segment.length = segment.p1.distance_to(segment.p2);
 		segment.dir = (segment.p2 - segment.p1).normalized();
 		Vector3 side = segment.dir.cross(Vector3(0, 1, 0));
 		side.y = 0;
 		segment.tangent = side.normalized();
 		segment.offset = offset;
-		lines[line].segments[i] = segment;
+		::lines[line].segments[i] = segment;
 		offset += segment.length;
 	}
 }
@@ -529,7 +611,7 @@ void RoadLinesData::line_add_building(const String &line, const String &key,
 	lb.line_offset = curve_offset;
 	lb.normal_offset = normal_offset;
 	lb.y_rotation = y_rotation;
-	lines[line].buildings.push_back(lb);
+	::lines[line].buildings.push_back(lb);
 	// TODO: save/load
 	BuildingsData::get_singleton()->get_building(key).line_name = line;
 }
@@ -538,14 +620,14 @@ void RoadLinesData::assign_close_buildings(const String &line)
 {
 	int j;
 	print_line("assign_close_buildings: " + line);
-	if (!lines.has(line))
+	if (!::lines.has(line))
 		return;
 	if (!line.ends_with("_buildings"))
 		return;
-	if (lines[line].points.size() < 2)
+	if (::lines[line].points.size() < 2)
 		return;
 	update_line_segments(line);
-	if (lines[line].segments.size() == 0)
+	if (::lines[line].segments.size() == 0)
 		return;
 	print_line("assign_close_buildings: processing: " +
 		   itos(BuildingsData::get_singleton()->get_building_count()) +
@@ -577,21 +659,22 @@ void RoadLinesData::assign_close_buildings(const String &line)
 		Vector3 segment_point;
 		int segment_index = -1;
 
-		for (j = 0; j < (int)lines[line].segments.size(); j++) {
-			Vector3 seg[] = { lines[line].segments[j].p1,
-					  lines[line].segments[j].p2 };
+		for (j = 0; j < (int)::lines[line].segments.size(); j++) {
+			Vector3 seg[] = { ::lines[line].segments[j].p1,
+					  ::lines[line].segments[j].p2 };
 			Vector3 closest =
 				Geometry::get_closest_point_to_segment(p, seg);
 			Vector3 xp = p;
 			xp.y = p.y;
 			float tmpdst = xp.distance_squared_to(closest);
 			if (closest.is_equal_approx(
-				    lines[line].segments[j].p1) ||
+				    ::lines[line].segments[j].p1) ||
 			    closest.is_equal_approx(
-				    lines[line].segments[j].p2)) {
+				    ::lines[line].segments[j].p2)) {
 				float w = closest.dot(
-					lines[line].segments[j].dir);
-				float wt = xp.dot(lines[line].segments[j].dir);
+					::lines[line].segments[j].dir);
+				float wt =
+					xp.dot(::lines[line].segments[j].dir);
 				if (wt - w > 0.1f || wt - w < -0.1f)
 					continue;
 			}
@@ -605,9 +688,9 @@ void RoadLinesData::assign_close_buildings(const String &line)
 		if (segment_index < 0)
 			continue;
 
-		const Vector3 &p1 = lines[line].segments[segment_index].p1;
-		const Vector3 &p2 = lines[line].segments[segment_index].p2;
-		const Vector3 &dir = lines[line].segments[segment_index].dir;
+		const Vector3 &p1 = ::lines[line].segments[segment_index].p1;
+		const Vector3 &p2 = ::lines[line].segments[segment_index].p2;
+		const Vector3 &dir = ::lines[line].segments[segment_index].dir;
 		assert(segment_index >= 0);
 		// assert(!segment_point.is_equal_approx(p1));
 		// assert(!segment_point.is_equal_approx(p2));
@@ -616,8 +699,8 @@ void RoadLinesData::assign_close_buildings(const String &line)
 		print_line("wdst=" + String::num(wdst));
 		assert(wdst >= 0);
 		result_offset =
-			lines[line].segments[segment_index].offset + wdst;
-		side = (p - p1).dot(lines[line].segments[j].tangent);
+			::lines[line].segments[segment_index].offset + wdst;
+		side = (p - p1).dot(::lines[line].segments[j].tangent);
 
 		assert(result_offset >= 0);
 
@@ -645,8 +728,8 @@ bool RoadLinesData::line_has_building(const String &line,
 	uint64_t key_hash = building_key.hash64();
 	bool ret = false;
 	int i;
-	for (i = 0; i < (int)lines[line].buildings.size(); i++)
-		if (lines[line].buildings[i].building_key_hash == key_hash) {
+	for (i = 0; i < (int)::lines[line].buildings.size(); i++)
+		if (::lines[line].buildings[i].building_key_hash == key_hash) {
 			ret = true;
 			break;
 		}
@@ -659,14 +742,14 @@ Vector3 RoadLinesData::get_point_by_offsets(const String &line,
 {
 	Vector3 ret;
 	int i;
-	assert(lines.has(line));
+	assert(::lines.has(line));
 	print_verbose("line: " + line +
 		      " line_offset: " + String::num(dir_offset) +
 		      " normal_offset: " + String::num(normal_offset));
 	float n_offset = dir_offset;
 	int selected_segment = 0;
-	for (i = 0; i < (int)lines[line].segments.size(); i++) {
-		struct line_segment *segment = &lines[line].segments[i];
+	for (i = 0; i < (int)::lines[line].segments.size(); i++) {
+		struct line_segment *segment = &::lines[line].segments[i];
 		if (n_offset < segment->length) {
 			selected_segment = i;
 			break;
@@ -674,9 +757,9 @@ Vector3 RoadLinesData::get_point_by_offsets(const String &line,
 		n_offset -= segment->length;
 	}
 	print_verbose("offset: " + String::num(n_offset));
-	ret = lines[line].segments[selected_segment].p1 +
-	      lines[line].segments[selected_segment].dir * n_offset +
-	      lines[line].segments[selected_segment].tangent * normal_offset;
+	ret = ::lines[line].segments[selected_segment].p1 +
+	      ::lines[line].segments[selected_segment].dir * n_offset +
+	      ::lines[line].segments[selected_segment].tangent * normal_offset;
 	print_verbose("data: " + (ret.operator String()));
 	return ret;
 }
@@ -685,46 +768,50 @@ void RoadLinesData::update_buildings_from_lines()
 {
 	BuildingsData *bd = BuildingsData::get_singleton();
 	List<String> keys;
-	lines.get_key_list(&keys);
+	::lines.get_key_list(&keys);
 	List<String>::Element *e = keys.front();
 	while (e) {
 		int i;
 		const String &line = e->get();
-		for (i = 0; i < (int)lines[line].buildings.size(); i++) {
+		for (i = 0; i < (int)::lines[line].buildings.size(); i++) {
 			const uint64_t &building_key_hash =
-				lines[line].buildings[i].building_key_hash;
+				::lines[line].buildings[i].building_key_hash;
 			bool found = bd->has_building(
-				lines[line].buildings[i].building_key);
+				::lines[line].buildings[i].building_key);
 			if (found) {
 				struct BuildingsData::building &b =
-					bd->get_building(lines[line]
+					bd->get_building(::lines[line]
 								 .buildings[i]
 								 .building_key);
 				Vector3 pt = get_point_by_offsets(
 					line,
-					lines[line].buildings[i].line_offset,
-					lines[line].buildings[i].normal_offset);
+					::lines[line].buildings[i].line_offset,
+					::lines[line]
+						.buildings[i]
+						.normal_offset);
 				Basis basis = Basis().rotated(
 					Vector3(0, 1, 0),
-					lines[line].buildings[i].y_rotation);
+					::lines[line].buildings[i].y_rotation);
 				b.xform.origin = pt;
 				b.xform.basis = basis;
 				Array args;
 				args.push_back(
-					lines[line].buildings[i].building_key);
+					::lines[line].buildings[i].building_key);
 				EditorEvent::get_singleton()->event.emit(
 					"building_updated", args);
 			} else {
 				Vector3 pt = get_point_by_offsets(
 					line,
-					lines[line].buildings[i].line_offset,
-					lines[line].buildings[i].normal_offset);
+					::lines[line].buildings[i].line_offset,
+					::lines[line]
+						.buildings[i]
+						.normal_offset);
 				Basis basis = Basis().rotated(
 					Vector3(0, 1, 0),
-					lines[line].buildings[i].y_rotation);
+					::lines[line].buildings[i].y_rotation);
 				struct BuildingsData::building nb;
 				Dictionary data;
-				data["id"] = lines[line].buildings[i].id;
+				data["id"] = ::lines[line].buildings[i].id;
 				data["xform"] = Transform(basis, pt);
 				BuildingsData::building::from_dict(&nb, data);
 				String bkey = bd->create_building(nb);
diff --git a/src/modules/stream/road_lines_data.h b/src/modules/stream/road_lines_data.h
index 806fdfe..1fc3863 100644
--- a/src/modules/stream/road_lines_data.h
+++ b/src/modules/stream/road_lines_data.h
@@ -25,6 +25,8 @@ public:
 				      const Dictionary &from);
 		Dictionary to_dict() const;
 	};
+
+private:
 	struct line_segment {
 		Vector3 p1;
 		Vector3 p2;
@@ -33,6 +35,8 @@ public:
 		Vector3 tangent;
 		float offset;
 	};
+
+public:
 	struct road_line {
 		std::vector<Transform> points;
 		std::vector<int> indices;
@@ -44,14 +48,28 @@ public:
 		Dictionary metadata;
 		_Signal<void> line_updated;
 	};
+
+public:
 	static ImmediateGeometry *get_debug_node();
-	HashMap<String, struct road_line> lines;
+
+private:
 	HashMap<String, Ref<Curve3D> > curves;
+
+public:
+	const struct road_line &get_line(const String &key) const;
+	struct road_line &get_line(const String &key);
+	const struct road_line &lines(const String &key) const;
+	struct road_line &lines(const String &key);
+	bool has_line(const String &key);
+
 	static RoadLinesData *get_singleton();
 	virtual ~RoadLinesData();
 	static void cleanup();
 	String get_road_lines_path();
 	void get_road_lines_key_list(List<String> *keys);
+	void get_lines_key_list(List<String> *keys);
+	const String &get_next_line(const String &key);
+	void erase_line(const String &key);
 	void load_data();
 	void save_data();
 	void process_lines(std::unordered_map<uint32_t, std::vector<Vector3> >
diff --git a/src/modules/stream/road_lines_editor.cpp b/src/modules/stream/road_lines_editor.cpp
index bde8d62..5832d7f 100644
--- a/src/modules/stream/road_lines_editor.cpp
+++ b/src/modules/stream/road_lines_editor.cpp
@@ -314,11 +314,11 @@ protected:
 			editor->get_as_node<ItemList>("%line_buildings_list");
 		items->clear();
 		for (i = 0; i < (int)RoadLinesData::get_singleton()
-					->lines[current_line]
+					->lines(current_line)
 					.buildings.size();
 		     i++) {
 			const String &key = RoadLinesData::get_singleton()
-						    ->lines[current_line]
+						    ->lines(current_line)
 						    .buildings[i]
 						    .building_key;
 			items->add_item(key);
@@ -615,7 +615,7 @@ Node *RoadLinesEditor::scene()
 void RoadLinesEditor::update_line_geometry()
 {
 	RoadLinesData *rld = RoadLinesData::get_singleton();
-	if (!rld->lines.has(current_line)) {
+	if (!rld->has_line(current_line)) {
 		if (line_im)
 			line_im->clear();
 		return;
@@ -629,16 +629,16 @@ void RoadLinesEditor::update_line_geometry()
 		line_im->set_color(Color(1.0f, 0.0f, 0.0f, 1.0f));
 		line_im->add_vertex(Vector3(0.0f, 100.0f, 0.0f));
 		line_im->end();
-		if (rld->lines[current_line].points.size() > 1) {
+		if (rld->lines(current_line).points.size() > 1) {
 			line_im->begin(Mesh::PRIMITIVE_LINES);
 			for (i = 0;
 			     i <
-			     (int)rld->lines[current_line].points.size() - 1;
+			     (int)rld->lines(current_line).points.size() - 1;
 			     i++) {
-				Vector3 pt1 = rld->lines[current_line]
+				Vector3 pt1 = rld->lines(current_line)
 						      .points[i]
 						      .origin;
-				Vector3 pt2 = rld->lines[current_line]
+				Vector3 pt2 = rld->lines(current_line)
 						      .points[i + 1]
 						      .origin;
 				line_im->set_color(
@@ -659,14 +659,14 @@ void RoadLinesEditor::update_line_geometry()
 		}
 		// FIXME: update line segments on load and when line is changed
 		rld->update_line_segments(current_line);
-		if (rld->lines[current_line].buildings.size() > 1) {
+		if (rld->lines(current_line).buildings.size() > 1) {
 			line_im->begin(Mesh::PRIMITIVE_LINES);
 			for (i = 0;
-			     i < (int)rld->lines[current_line].buildings.size();
+			     i < (int)rld->lines(current_line).buildings.size();
 			     i++) {
 				print_line("idx: " + itos(i));
 				const RoadLinesData::line_building_data &b =
-					rld->lines[current_line].buildings[i];
+					rld->lines(current_line).buildings[i];
 				Vector3 pt = rld->get_point_by_offsets(
 					current_line, b.line_offset,
 					b.normal_offset);
@@ -686,14 +686,14 @@ void RoadLinesEditor::update_line_index_ui()
 {
 	RoadLinesData *rld = RoadLinesData::get_singleton();
 	SpinBox *sp_line_index = get_as_node<SpinBox>("%line_index");
-	sp_line_index->set_max(rld->lines[current_line].points.size() - 1);
+	sp_line_index->set_max(rld->lines(current_line).points.size() - 1);
 	sp_line_index->set_min(0);
 }
 void RoadLinesEditor::select_line(const String &line_name)
 {
 	print_line("selected line: " + line_name);
 	RoadLinesData *rld = RoadLinesData::get_singleton();
-	assert(rld->lines.has(line_name));
+	assert(rld->has_line(line_name));
 	if (current_line != line_name) {
 		current_line = line_name;
 		update_line_index_ui();
@@ -713,7 +713,7 @@ void RoadLinesEditor::select_line(const String &line_name)
 bool RoadLinesEditor::line_exists(const String &line_name)
 {
 	RoadLinesData *rld = RoadLinesData::get_singleton();
-	return rld->lines.has(line_name);
+	return rld->has_line(line_name);
 }
 
 void RoadLinesEditor::line_create_point()
@@ -724,8 +724,10 @@ void RoadLinesEditor::line_create_point()
 	Vector3 position = get_cursor_position();
 	Transform xform(Basis(), position);
 	int index = get_line_index();
-	rld->lines[current_line].points.insert(
-		rld->lines[current_line].points.begin() + index + 1, xform);
+	rld->lines(current_line)
+		.points.insert(rld->lines(current_line).points.begin() + index +
+				       1,
+			       xform);
 	Array args;
 	args.push_back(current_line);
 	EditorEvent::get_singleton()->event.emit("lines_changed_line", args);
@@ -742,10 +744,10 @@ void RoadLinesEditor::line_delete_point()
 	print_line("line_delete_point");
 	int index = get_line_index();
 	RoadLinesData *rld = RoadLinesData::get_singleton();
-	if (rld->lines[current_line].points.size() < 2)
+	if (rld->lines(current_line).points.size() < 2)
 		return;
-	rld->lines[current_line].points.erase(
-		rld->lines[current_line].points.begin() + index);
+	rld->lines(current_line)
+		.points.erase(rld->lines(current_line).points.begin() + index);
 	Array args;
 	args.push_back(current_line);
 	EditorEvent::get_singleton()->event.emit("lines_changed_line", args);
@@ -766,12 +768,12 @@ void RoadLinesEditor::set_point_to_cursor()
 	Spatial *cursor = get_as_node<Spatial>(cursor_name);
 	Transform xform = cursor->get_global_transform();
 	int index = get_line_index();
-	rld->lines[current_line].points[index].origin = xform.origin;
+	rld->lines(current_line).points[index].origin = xform.origin;
 	Array args;
 	args.push_back(current_line);
 	EditorEvent::get_singleton()->event.emit("lines_changed_line", args);
 	update_line_geometry();
-	set_ui_point_position(rld->lines[current_line].points[index].origin);
+	set_ui_point_position(rld->lines(current_line).points[index].origin);
 }
 
 int RoadLinesEditor::get_line_index()
@@ -787,7 +789,7 @@ void RoadLinesEditor::move_cursor_to_point()
 	print_line("move_cursor_to_point");
 	RoadLinesData *rld = RoadLinesData::get_singleton();
 	int index = get_line_index();
-	Transform xform(Basis(), rld->lines[current_line].points[index].origin);
+	Transform xform(Basis(), rld->lines(current_line).points[index].origin);
 	set_cursor_position(xform.origin);
 	set_ui_cursor_position(xform.origin);
 }
@@ -899,7 +901,7 @@ void RoadLinesEditor::update_ui()
 	get_as_node<Control>("%road_lines_buildings")->hide();
 	ItemList *lines_list = get_as_node<ItemList>("%lines_list");
 	List<String> line_keys;
-	rld->lines.get_key_list(&line_keys);
+	rld->get_lines_key_list(&line_keys);
 	List<String>::Element *e = line_keys.front();
 	lines_list->clear();
 	if (!re.is_valid())
@@ -942,7 +944,7 @@ void RoadLinesEditor::create_new_line_at_cursor(const String &line_name)
 	rline.pattern = 0;
 	Transform cursor_position(Basis(), get_cursor_position());
 	rline.points.push_back(cursor_position);
-	rld->lines[line_name] = rline;
+	rld->lines(line_name) = rline;
 	update_line_index_ui();
 	update_ui();
 }
@@ -951,9 +953,8 @@ void RoadLinesEditor::delete_current_line()
 {
 	RoadLinesData *rld = RoadLinesData::get_singleton();
 	String delete_line = current_line;
-	const String *k = rld->lines.next(&delete_line);
-	current_line = *k;
-	rld->lines.erase(delete_line);
+	current_line = rld->get_next_line(delete_line);
+	rld->erase_line(delete_line);
 	update_line_index_ui();
 	update_ui();
 }
@@ -976,7 +977,7 @@ void RoadLinesEditor::set_point_position(const Vector3 &position)
 {
 	RoadLinesData *rld = RoadLinesData::get_singleton();
 	int index = get_line_index();
-	rld->lines[current_line].points[index].origin = position;
+	rld->lines(current_line).points[index].origin = position;
 	Array args;
 	args.push_back(current_line);
 	EditorEvent::get_singleton()->event.emit("lines_changed_line", args);
@@ -1004,9 +1005,9 @@ void RoadLinesEditor::set_ui_point_position(const Vector3 &point_position)
 void RoadLinesEditor::set_line_index(int index)
 {
 	RoadLinesData *rld = RoadLinesData::get_singleton();
-	assert(rld->lines.has(current_line));
-	assert(index < (int)rld->lines[current_line].points.size());
-	Vector3 point_position = rld->lines[current_line].points[index].origin;
+	assert(rld->has_line(current_line));
+	assert(index < (int)rld->lines(current_line).points.size());
+	Vector3 point_position = rld->lines(current_line).points[index].origin;
 	Vector3 cursor_position = point_position;
 	set_cursor_position(cursor_position);
 	set_ui_cursor_position(cursor_position);
@@ -1227,7 +1228,7 @@ void RoadLinesEditor::save_data()
 void RoadLinesEditor::update_current_line_metadata(const String &text)
 {
 	RoadLinesData *rld = RoadLinesData::get_singleton();
-	assert(rld->lines.has(current_line));
+	assert(rld->has_line(current_line));
 	if (!text.begins_with("{"))
 		return;
 	String err_s;
@@ -1243,13 +1244,13 @@ void RoadLinesEditor::update_current_line_metadata(const String &text)
 		print_line("Invalid metadata type, should be Dictionary");
 		return;
 	}
-	rld->lines[current_line].metadata = v;
+	rld->lines(current_line).metadata = v;
 }
 String RoadLinesEditor::get_current_line_metadata() const
 {
 	RoadLinesData *rld = RoadLinesData::get_singleton();
-	assert(rld->lines.has(current_line));
-	return JSON::print(rld->lines[current_line].metadata, "\t", true);
+	assert(rld->has_line(current_line));
+	return JSON::print(rld->lines(current_line).metadata, "\t", true);
 }
 void RoadLinesEditor::remove_generated_stuff()
 {
diff --git a/src/modules/stream/road_processing.cpp b/src/modules/stream/road_processing.cpp
index 68885d4..6ac4dae 100644
--- a/src/modules/stream/road_processing.cpp
+++ b/src/modules/stream/road_processing.cpp
@@ -63,14 +63,14 @@ struct RoadLinesProcessing {
 		List<String>::Element *e = keys.front();
 		while (e) {
 			const String &key = e->get();
-			if (rld->lines[key].indices.size() < 2) {
+			if (rld->lines(key).indices.size() < 2) {
 				e = e->next();
 				continue;
 			}
-			for (i = 0; i < (int)rld->lines[key].indices.size() - 1;
+			for (i = 0; i < (int)rld->lines(key).indices.size() - 1;
 			     i++) {
-				int idx1 = rld->lines[key].indices[i];
-				int idx2 = rld->lines[key].indices[i + 1];
+				int idx1 = rld->lines(key).indices[i];
+				int idx2 = rld->lines(key).indices[i + 1];
 				if (edges.find(idx1) == edges.end()) {
 					struct edgedata ed;
 					ed.neighbors.clear();
diff --git a/src/modules/stream/stream.cpp b/src/modules/stream/stream.cpp
index c8efe66..f7299ae 100644
--- a/src/modules/stream/stream.cpp
+++ b/src/modules/stream/stream.cpp
@@ -18,10 +18,10 @@ void StreamWorld::create_tilemap()
 {
 	data()->for_each_building(
 		[this](const String &key, void *hdata) {
-			int tile_x = data()->get_building(key).xform.origin.x /
-				     tile_size;
-			int tile_z = data()->get_building(key).xform.origin.z /
-				     tile_size;
+			const struct BuildingsData::building &b =
+				data()->get_building(key);
+			int tile_x = b.xform.origin.x / tile_size;
+			int tile_z = b.xform.origin.z / tile_size;
 			std::tuple<int, int> tkey =
 				std::make_tuple(tile_x, tile_z);
 			if (tiles.find(tkey) != tiles.end())
@@ -32,19 +32,6 @@ void StreamWorld::create_tilemap()
 			}
 		},
 		nullptr);
-#if 0
-	for (i = 0; i < (int)data()->get_building_count(); i++) {
-		int tile_x = data()->get_building(i).xform.origin.x / tile_size;
-		int tile_z = data()->get_building(i).xform.origin.z / tile_size;
-		std::tuple<int, int> key = std::make_tuple(tile_x, tile_z);
-		if (tiles.find(key) != tiles.end())
-			tiles[key].push_back(i);
-		else {
-			std::vector<int> data = { i };
-			tiles[key] = data;
-		}
-	}
-#endif
 	print_line("Tile count: " + itos(tiles.size()));
 }
 
@@ -243,7 +230,7 @@ void StreamWorld::remove_building(const String &key)
 	// TODO: implement
 	unload_building(key);
 	data()->destroy_building(key);
-	data()->item_nodes_item_removed(key);
+	assert(!data()->has_building(key));
 	update_items();
 }
 
@@ -352,7 +339,7 @@ void StreamWorld::run_command(const String &command, const Array &args)
 		for (i = erased_keys.size() - 1; i >= 0; i--) {
 			unload_building(erased_keys[i]);
 			data()->destroy_building(erased_keys[i]);
-			data()->item_nodes_item_removed(erased_keys[i]);
+			assert(!data()->has_building(erased_keys[i]));
 		}
 		update_items();
 	} else if (command == "remove_generated_stuff") {
@@ -475,7 +462,7 @@ void StreamWorld::remove_generated_stuff()
 		const String &key = erased_keys[i];
 		unload_building(key);
 		data()->destroy_building(key);
-		data()->item_nodes_item_removed(key);
+		assert(!data()->has_building(key));
 	}
 	update_items();
 }