30 files changed, 907 insertions, 702 deletions
diff --git a/core/bind/core_bind.cpp b/core/bind/core_bind.cpp
index 67de156fc3..98d3e77f66 100644
--- a/core/bind/core_bind.cpp
+++ b/core/bind/core_bind.cpp
@@ -148,7 +148,7 @@ _ResourceLoader::_ResourceLoader() {
 	singleton = this;
 }
 
-Error _ResourceSaver::save(const String &p_path, const RES &p_resource, uint32_t p_flags) {
+Error _ResourceSaver::save(const String &p_path, const RES &p_resource, SaverFlags p_flags) {
 
 	ERR_FAIL_COND_V(p_resource.is_null(), ERR_INVALID_PARAMETER);
 	return ResourceSaver::save(p_path, p_resource, p_flags);
@@ -1579,7 +1579,7 @@ _Geometry::_Geometry() {
 
 ///////////////////////// FILE
 
-Error _File::open_encrypted(const String &p_path, int p_mode_flags, const Vector<uint8_t> &p_key) {
+Error _File::open_encrypted(const String &p_path, ModeFlags p_mode_flags, const Vector<uint8_t> &p_key) {
 
 	Error err = open(p_path, p_mode_flags);
 	if (err)
@@ -1596,7 +1596,7 @@ Error _File::open_encrypted(const String &p_path, int p_mode_flags, const Vector
 	return OK;
 }
 
-Error _File::open_encrypted_pass(const String &p_path, int p_mode_flags, const String &p_pass) {
+Error _File::open_encrypted_pass(const String &p_path, ModeFlags p_mode_flags, const String &p_pass) {
 
 	Error err = open(p_path, p_mode_flags);
 	if (err)
@@ -1614,7 +1614,7 @@ Error _File::open_encrypted_pass(const String &p_path, int p_mode_flags, const S
 	return OK;
 }
 
-Error _File::open_compressed(const String &p_path, int p_mode_flags, int p_compress_mode) {
+Error _File::open_compressed(const String &p_path, ModeFlags p_mode_flags, CompressionMode p_compress_mode) {
 
 	FileAccessCompressed *fac = memnew(FileAccessCompressed);
 
@@ -1631,7 +1631,7 @@ Error _File::open_compressed(const String &p_path, int p_mode_flags, int p_compr
 	return OK;
 }
 
-Error _File::open(const String &p_path, int p_mode_flags) {
+Error _File::open(const String &p_path, ModeFlags p_mode_flags) {
 
 	close();
 	Error err;
@@ -2453,12 +2453,12 @@ void _Thread::_start_func(void *ud) {
 	}
 }
 
-Error _Thread::start(Object *p_instance, const StringName &p_method, const Variant &p_userdata, int p_priority) {
+Error _Thread::start(Object *p_instance, const StringName &p_method, const Variant &p_userdata, Priority p_priority) {
 
 	ERR_FAIL_COND_V(active, ERR_ALREADY_IN_USE);
 	ERR_FAIL_COND_V(!p_instance, ERR_INVALID_PARAMETER);
 	ERR_FAIL_COND_V(p_method == StringName(), ERR_INVALID_PARAMETER);
-	ERR_FAIL_INDEX_V(p_priority, 3, ERR_INVALID_PARAMETER);
+	ERR_FAIL_INDEX_V(p_priority, PRIORITY_MAX, ERR_INVALID_PARAMETER);
 
 	ret = Variant();
 	target_method = p_method;
diff --git a/core/bind/core_bind.h b/core/bind/core_bind.h
index 1c26d9b144..2906de4a4a 100644
--- a/core/bind/core_bind.h
+++ b/core/bind/core_bind.h
@@ -85,7 +85,7 @@ public:
 
 	static _ResourceSaver *get_singleton() { return singleton; }
 
-	Error save(const String &p_path, const RES &p_resource, uint32_t p_flags);
+	Error save(const String &p_path, const RES &p_resource, SaverFlags p_flags);
 	PoolVector<String> get_recognized_extensions(const RES &p_resource);
 
 	_ResourceSaver();
@@ -436,11 +436,11 @@ public:
 		COMPRESSION_GZIP = Compression::MODE_GZIP
 	};
 
-	Error open_encrypted(const String &p_path, int p_mode_flags, const Vector<uint8_t> &p_key);
-	Error open_encrypted_pass(const String &p_path, int p_mode_flags, const String &p_pass);
-	Error open_compressed(const String &p_path, int p_mode_flags, int p_compress_mode = 0);
+	Error open_encrypted(const String &p_path, ModeFlags p_mode_flags, const Vector<uint8_t> &p_key);
+	Error open_encrypted_pass(const String &p_path, ModeFlags p_mode_flags, const String &p_pass);
+	Error open_compressed(const String &p_path, ModeFlags p_mode_flags, CompressionMode p_compress_mode = COMPRESSION_FASTLZ);
 
-	Error open(const String &p_path, int p_mode_flags); ///< open a file
+	Error open(const String &p_path, ModeFlags p_mode_flags); ///< open a file
 	void close(); ///< close a file
 	bool is_open() const; ///< true when file is open
 
@@ -632,10 +632,11 @@ public:
 
 		PRIORITY_LOW,
 		PRIORITY_NORMAL,
-		PRIORITY_HIGH
+		PRIORITY_HIGH,
+		PRIORITY_MAX
 	};
 
-	Error start(Object *p_instance, const StringName &p_method, const Variant &p_userdata = Variant(), int p_priority = PRIORITY_NORMAL);
+	Error start(Object *p_instance, const StringName &p_method, const Variant &p_userdata = Variant(), Priority p_priority = PRIORITY_NORMAL);
 	String get_id() const;
 	bool is_active() const;
 	Variant wait_to_finish();
diff --git a/core/class_db.cpp b/core/class_db.cpp
index 219bdbddd8..0c844657a4 100644
--- a/core/class_db.cpp
+++ b/core/class_db.cpp
@@ -249,6 +249,11 @@ void ClassDB::set_current_api(APIType p_api) {
 	current_api = p_api;
 }
 
+ClassDB::APIType ClassDB::get_current_api() {
+
+	return current_api;
+}
+
 HashMap<StringName, ClassDB::ClassInfo> ClassDB::classes;
 HashMap<StringName, StringName> ClassDB::resource_base_extensions;
 HashMap<StringName, StringName> ClassDB::compat_classes;
@@ -307,6 +312,19 @@ void ClassDB::get_inheriters_from_class(const StringName &p_class, List<StringNa
 	}
 }
 
+void ClassDB::get_direct_inheriters_from_class(const StringName &p_class, List<StringName> *p_classes) {
+
+	OBJTYPE_RLOCK;
+
+	const StringName *k = NULL;
+
+	while ((k = classes.next(k))) {
+
+		if (*k != p_class && get_parent_class(*k) == p_class)
+			p_classes->push_back(*k);
+	}
+}
+
 StringName ClassDB::get_parent_class_nocheck(const StringName &p_class) {
 
 	OBJTYPE_RLOCK;
diff --git a/core/class_db.h b/core/class_db.h
index 321682d76b..efa1a46866 100644
--- a/core/class_db.h
+++ b/core/class_db.h
@@ -214,6 +214,7 @@ public:
 
 	static void get_class_list(List<StringName> *p_classes);
 	static void get_inheriters_from_class(const StringName &p_class, List<StringName> *p_classes);
+	static void get_direct_inheriters_from_class(const StringName &p_class, List<StringName> *p_classes);
 	static StringName get_parent_class_nocheck(const StringName &p_class);
 	static StringName get_parent_class(const StringName &p_class);
 	static bool class_exists(const StringName &p_class);
@@ -371,6 +372,7 @@ public:
 	static void init();
 
 	static void set_current_api(APIType p_api);
+	static APIType get_current_api();
 	static void cleanup();
 };
 
diff --git a/core/io/multiplayer_api.cpp b/core/io/multiplayer_api.cpp
index 22530ad721..86382939f1 100644
--- a/core/io/multiplayer_api.cpp
+++ b/core/io/multiplayer_api.cpp
@@ -46,7 +46,8 @@ _FORCE_INLINE_ bool _should_call_local(MultiplayerAPI::RPCMode mode, bool is_mas
 		case MultiplayerAPI::RPC_MODE_MASTERSYNC: {
 			if (is_master)
 				r_skip_rpc = true; // I am the master, so skip remote call.
-		} // Do not break, fall over to other sync.
+			FALLTHROUGH;
+		}
 		case MultiplayerAPI::RPC_MODE_REMOTESYNC:
 		case MultiplayerAPI::RPC_MODE_PUPPETSYNC: {
 			// Call it, sync always results in a local call.
@@ -64,7 +65,7 @@ _FORCE_INLINE_ bool _should_call_local(MultiplayerAPI::RPCMode mode, bool is_mas
 	return false;
 }
 
-_FORCE_INLINE_ bool _can_call_mode(MultiplayerAPI::RPCMode mode, int p_node_master, int p_remote_id) {
+_FORCE_INLINE_ bool _can_call_mode(Node *p_node, MultiplayerAPI::RPCMode mode, int p_remote_id) {
 	switch (mode) {
 
 		case MultiplayerAPI::RPC_MODE_DISABLED: {
@@ -76,11 +77,11 @@ _FORCE_INLINE_ bool _can_call_mode(MultiplayerAPI::RPCMode mode, int p_node_mast
 		} break;
 		case MultiplayerAPI::RPC_MODE_MASTERSYNC:
 		case MultiplayerAPI::RPC_MODE_MASTER: {
-			return p_node_master == NetworkedMultiplayerPeer::TARGET_PEER_SERVER;
+			return p_node->is_network_master();
 		} break;
 		case MultiplayerAPI::RPC_MODE_PUPPETSYNC:
 		case MultiplayerAPI::RPC_MODE_PUPPET: {
-			return p_node_master != NetworkedMultiplayerPeer::TARGET_PEER_SERVER && p_remote_id == p_node_master;
+			return !p_node->is_network_master() && p_remote_id == p_node->get_network_master();
 		} break;
 	}
 
@@ -282,9 +283,8 @@ void MultiplayerAPI::_process_rpc(Node *p_node, const StringName &p_name, int p_
 		rpc_mode = p_node->get_script_instance()->get_rpc_mode(p_name);
 	}
 
-	int node_master_id = p_node->get_network_master();
-	ERR_EXPLAIN("RPC '" + String(p_name) + "' is not allowed on node " + p_node->get_path() + " from: " + itos(p_from) + ". Mode is " + itos((int)rpc_mode) + ", master is " + itos(node_master_id) + ".");
-	ERR_FAIL_COND(!_can_call_mode(rpc_mode, p_from, node_master_id));
+	ERR_EXPLAIN("RPC '" + String(p_name) + "' is not allowed from: " + itos(p_from) + ". Mode is " + itos((int)rpc_mode) + ", master is " + itos(p_node->get_network_master()) + ".");
+	ERR_FAIL_COND(!_can_call_mode(p_node, rpc_mode, p_from));
 
 	int argc = p_packet[p_offset];
 	Vector<Variant> args;
@@ -332,9 +332,8 @@ void MultiplayerAPI::_process_rset(Node *p_node, const StringName &p_name, int p
 		rset_mode = p_node->get_script_instance()->get_rset_mode(p_name);
 	}
 
-	int node_master_id = p_node->get_network_master();
-	ERR_EXPLAIN("RSET '" + String(p_name) + "' is not allowed on node " + p_node->get_path() + " from: " + itos(p_from) + ". Mode is " + itos((int)rset_mode) + ", master is " + itos(node_master_id) + ".");
-	ERR_FAIL_COND(!_can_call_mode(rset_mode, p_from, node_master_id));
+	ERR_EXPLAIN("RSET '" + String(p_name) + "' is not allowed from: " + itos(p_from) + ". Mode is " + itos((int)rset_mode) + ", master is " + itos(p_node->get_network_master()) + ".");
+	ERR_FAIL_COND(!_can_call_mode(p_node, rset_mode, p_from));
 
 	Variant value;
 	Error err = decode_variant(value, &p_packet[p_offset], p_packet_len - p_offset, NULL, allow_object_decoding || network_peer->is_object_decoding_allowed());
diff --git a/core/math/a_star.cpp b/core/math/a_star.cpp
index 6c3b84d49a..e1388ad2ac 100644
--- a/core/math/a_star.cpp
+++ b/core/math/a_star.cpp
@@ -55,6 +55,7 @@ void AStar::add_point(int p_id, const Vector3 &p_pos, real_t p_weight_scale) {
 		pt->weight_scale = p_weight_scale;
 		pt->prev_point = NULL;
 		pt->last_pass = 0;
+		pt->enabled = true;
 		points[p_id] = pt;
 	} else {
 		points[p_id]->pos = p_pos;
@@ -242,6 +243,9 @@ bool AStar::_solve(Point *begin_point, Point *end_point) {
 
 	pass++;
 
+	if (!end_point->enabled)
+		return false;
+
 	SelfList<Point>::List open_list;
 
 	bool found_route = false;
@@ -249,6 +253,10 @@ bool AStar::_solve(Point *begin_point, Point *end_point) {
 	for (Set<Point *>::Element *E = begin_point->neighbours.front(); E; E = E->next()) {
 
 		Point *n = E->get();
+
+		if (!n->enabled)
+			continue;
+
 		n->prev_point = begin_point;
 		n->distance = _compute_cost(begin_point->id, n->id) * n->weight_scale;
 		n->last_pass = pass;
@@ -290,6 +298,9 @@ bool AStar::_solve(Point *begin_point, Point *end_point) {
 
 			Point *e = E->get();
 
+			if (!e->enabled)
+				continue;
+
 			real_t distance = _compute_cost(p->id, e->id) * e->weight_scale + p->distance;
 
 			if (e->last_pass == pass) {
@@ -438,6 +449,14 @@ PoolVector<int> AStar::get_id_path(int p_from_id, int p_to_id) {
 	return path;
 }
 
+void AStar::set_point_disabled(int p_id, bool p_disabled) {
+	points[p_id]->enabled = !p_disabled;
+}
+
+bool AStar::is_point_disabled(int p_id) const {
+	return !points[p_id]->enabled;
+}
+
 void AStar::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("get_available_point_id"), &AStar::get_available_point_id);
@@ -450,6 +469,9 @@ void AStar::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("has_point", "id"), &AStar::has_point);
 	ClassDB::bind_method(D_METHOD("get_points"), &AStar::get_points);
 
+	ClassDB::bind_method(D_METHOD("set_point_disabled", "id", "disabled"), &AStar::set_point_disabled, DEFVAL(true));
+	ClassDB::bind_method(D_METHOD("is_point_disabled", "id"), &AStar::is_point_disabled);
+
 	ClassDB::bind_method(D_METHOD("get_point_connections", "id"), &AStar::get_point_connections);
 
 	ClassDB::bind_method(D_METHOD("connect_points", "id", "to_id", "bidirectional"), &AStar::connect_points, DEFVAL(true));
diff --git a/core/math/a_star.h b/core/math/a_star.h
index d094bc4863..c63e1aa4dc 100644
--- a/core/math/a_star.h
+++ b/core/math/a_star.h
@@ -54,6 +54,7 @@ class AStar : public Reference {
 		Vector3 pos;
 		real_t weight_scale;
 		uint64_t last_pass;
+		bool enabled;
 
 		Set<Point *> neighbours;
 
@@ -114,6 +115,9 @@ public:
 	PoolVector<int> get_point_connections(int p_id);
 	Array get_points();
 
+	void set_point_disabled(int p_id, bool p_disabled = true);
+	bool is_point_disabled(int p_id) const;
+
 	void connect_points(int p_id, int p_with_id, bool bidirectional = true);
 	void disconnect_points(int p_id, int p_with_id);
 	bool are_points_connected(int p_id, int p_with_id) const;
diff --git a/core/math/audio_frame.h b/core/math/audio_frame.h
index f970c510e0..ebe0356c93 100644
--- a/core/math/audio_frame.h
+++ b/core/math/audio_frame.h
@@ -122,6 +122,12 @@ struct AudioFrame {
 		r = p_frame.r;
 	}
 
+	_ALWAYS_INLINE_ AudioFrame operator=(const AudioFrame &p_frame) {
+		l = p_frame.l;
+		r = p_frame.r;
+		return *this;
+	}
+
 	_ALWAYS_INLINE_ AudioFrame() {}
 };
 
diff --git a/core/math/expression.cpp b/core/math/expression.cpp
index 708054e4ab..05b49f0815 100644
--- a/core/math/expression.cpp
+++ b/core/math/expression.cpp
@@ -68,6 +68,7 @@ const char *Expression::func_name[Expression::FUNC_MAX] = {
 	"lerp",
 	"inverse_lerp",
 	"range_lerp",
+	"smoothstep",
 	"dectime",
 	"randomize",
 	"randi",
@@ -185,6 +186,7 @@ int Expression::get_func_argument_count(BuiltinFunc p_func) {
 			return 2;
 		case MATH_LERP:
 		case MATH_INVERSE_LERP:
+		case MATH_SMOOTHSTEP:
 		case MATH_DECTIME:
 		case MATH_WRAP:
 		case MATH_WRAPF:
@@ -392,6 +394,12 @@ void Expression::exec_func(BuiltinFunc p_func, const Variant **p_inputs, Variant
 			VALIDATE_ARG_NUM(4);
 			*r_return = Math::range_lerp((double)*p_inputs[0], (double)*p_inputs[1], (double)*p_inputs[2], (double)*p_inputs[3], (double)*p_inputs[4]);
 		} break;
+		case MATH_SMOOTHSTEP: {
+			VALIDATE_ARG_NUM(0);
+			VALIDATE_ARG_NUM(1);
+			VALIDATE_ARG_NUM(2);
+			*r_return = Math::smoothstep((double)*p_inputs[0], (double)*p_inputs[1], (double)*p_inputs[2]);
+		} break;
 		case MATH_DECTIME: {
 
 			VALIDATE_ARG_NUM(0);
diff --git a/core/math/expression.h b/core/math/expression.h
index fa0878c93c..f9075cb689 100644
--- a/core/math/expression.h
+++ b/core/math/expression.h
@@ -66,6 +66,7 @@ public:
 		MATH_LERP,
 		MATH_INVERSE_LERP,
 		MATH_RANGE_LERP,
+		MATH_SMOOTHSTEP,
 		MATH_DECTIME,
 		MATH_RANDOMIZE,
 		MATH_RAND,
diff --git a/core/math/geometry.h b/core/math/geometry.h
index 4b478b6b16..7347cb742a 100644
--- a/core/math/geometry.h
+++ b/core/math/geometry.h
@@ -702,9 +702,11 @@ public:
 		/* if we can assume that the line segment starts outside the circle (e.g. for continuous time collision detection) then the following can be skipped and we can just return the equivalent of res1 */
 		sqrtterm = Math::sqrt(sqrtterm);
 		real_t res1 = (-b - sqrtterm) / (2 * a);
-		//real_t res2 = ( -b + sqrtterm ) / (2 * a);
+		real_t res2 = (-b + sqrtterm) / (2 * a);
 
-		return (res1 >= 0 && res1 <= 1) ? res1 : -1;
+		if (res1 >= 0 && res1 <= 1) return res1;
+		if (res2 >= 0 && res2 <= 1) return res2;
+		return -1;
 	}
 
 	static inline Vector<Vector3> clip_polygon(const Vector<Vector3> &polygon, const Plane &p_plane) {
diff --git a/core/math/math_funcs.h b/core/math/math_funcs.h
index 6ac6839827..0d209402dd 100644
--- a/core/math/math_funcs.h
+++ b/core/math/math_funcs.h
@@ -208,6 +208,17 @@ public:
 	static _ALWAYS_INLINE_ double range_lerp(double p_value, double p_istart, double p_istop, double p_ostart, double p_ostop) { return Math::lerp(p_ostart, p_ostop, Math::inverse_lerp(p_istart, p_istop, p_value)); }
 	static _ALWAYS_INLINE_ float range_lerp(float p_value, float p_istart, float p_istop, float p_ostart, float p_ostop) { return Math::lerp(p_ostart, p_ostop, Math::inverse_lerp(p_istart, p_istop, p_value)); }
 
+	static _ALWAYS_INLINE_ double smoothstep(double p_from, double p_to, double p_weight) {
+		if (is_equal_approx(p_from, p_to)) return p_from;
+		double x = CLAMP((p_weight - p_from) / (p_to - p_from), 0.0, 1.0);
+		return x * x * (3.0 - 2.0 * x);
+	}
+	static _ALWAYS_INLINE_ float smoothstep(float p_from, float p_to, float p_weight) {
+		if (is_equal_approx(p_from, p_to)) return p_from;
+		float x = CLAMP((p_weight - p_from) / (p_to - p_from), 0.0f, 1.0f);
+		return x * x * (3.0f - 2.0f * x);
+	}
+
 	static _ALWAYS_INLINE_ double linear2db(double p_linear) { return Math::log(p_linear) * 8.6858896380650365530225783783321; }
 	static _ALWAYS_INLINE_ float linear2db(float p_linear) { return Math::log(p_linear) * 8.6858896380650365530225783783321; }
 
diff --git a/core/math/quat.h b/core/math/quat.h
index 7d71ec03e8..8ed2fa7cc2 100644
--- a/core/math/quat.h
+++ b/core/math/quat.h
@@ -131,6 +131,14 @@ public:
 			w(q.w) {
 	}
 
+	Quat operator=(const Quat &q) {
+		x = q.x;
+		y = q.y;
+		z = q.z;
+		w = q.w;
+		return *this;
+	}
+
 	Quat(const Vector3 &v0, const Vector3 &v1) // shortest arc
 	{
 		Vector3 c = v0.cross(v1);
diff --git a/core/math/random_number_generator.cpp b/core/math/random_number_generator.cpp
index fccc0f72fe..6add00c1d8 100644
--- a/core/math/random_number_generator.cpp
+++ b/core/math/random_number_generator.cpp
@@ -40,6 +40,7 @@ void RandomNumberGenerator::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("randi"), &RandomNumberGenerator::randi);
 	ClassDB::bind_method(D_METHOD("randf"), &RandomNumberGenerator::randf);
+	ClassDB::bind_method(D_METHOD("randfn", "mean", "deviation"), &RandomNumberGenerator::randfn, DEFVAL(0.0), DEFVAL(1.0));
 	ClassDB::bind_method(D_METHOD("randf_range", "from", "to"), &RandomNumberGenerator::randf_range);
 	ClassDB::bind_method(D_METHOD("randi_range", "from", "to"), &RandomNumberGenerator::randi_range);
 	ClassDB::bind_method(D_METHOD("randomize"), &RandomNumberGenerator::randomize);
diff --git a/core/math/random_number_generator.h b/core/math/random_number_generator.h
index 66c77b8ccf..6b6bcdd2cd 100644
--- a/core/math/random_number_generator.h
+++ b/core/math/random_number_generator.h
@@ -55,6 +55,8 @@ public:
 
 	_FORCE_INLINE_ real_t randf_range(real_t from, real_t to) { return randbase.random(from, to); }
 
+	_FORCE_INLINE_ real_t randfn(real_t mean = 0.0, real_t deviation = 1.0) { return randbase.randfn(mean, deviation); }
+
 	_FORCE_INLINE_ int randi_range(int from, int to) {
 		unsigned int ret = randbase.rand();
 		return ret % (to - from + 1) + from;
diff --git a/core/math/random_pcg.h b/core/math/random_pcg.h
index cd721ef4d1..0d1b311c0d 100644
--- a/core/math/random_pcg.h
+++ b/core/math/random_pcg.h
@@ -31,6 +31,8 @@
 #ifndef RANDOM_PCG_H
 #define RANDOM_PCG_H
 
+#include <math.h>
+
 #include "core/math/math_defs.h"
 
 #include "thirdparty/misc/pcg.h"
@@ -61,6 +63,13 @@ public:
 	_FORCE_INLINE_ double randd() { return (double)rand() / (double)RANDOM_MAX; }
 	_FORCE_INLINE_ float randf() { return (float)rand() / (float)RANDOM_MAX; }
 
+	_FORCE_INLINE_ double randfn(double p_mean, double p_deviation) {
+		return p_mean + p_deviation * (cos(Math_TAU * randd()) * sqrt(-2.0 * log(randd()))); // Box-Muller transform
+	}
+	_FORCE_INLINE_ float randfn(float p_mean, float p_deviation) {
+		return p_mean + p_deviation * (cos(Math_TAU * randf()) * sqrt(-2.0 * log(randf()))); // Box-Muller transform
+	}
+
 	double random(double p_from, double p_to);
 	float random(float p_from, float p_to);
 	real_t random(int p_from, int p_to) { return (real_t)random((real_t)p_from, (real_t)p_to); }
diff --git a/core/math/vector2.h b/core/math/vector2.h
index a20326f667..ae2d1ec660 100644
--- a/core/math/vector2.h
+++ b/core/math/vector2.h
@@ -65,6 +65,7 @@ struct Vector2 {
 	real_t distance_squared_to(const Vector2 &p_vector2) const;
 	real_t angle_to(const Vector2 &p_vector2) const;
 	real_t angle_to_point(const Vector2 &p_vector2) const;
+	_FORCE_INLINE_ Vector2 direction_to(const Vector2 &p_b) const;
 
 	real_t dot(const Vector2 &p_other) const;
 	real_t cross(const Vector2 &p_other) const;
@@ -236,6 +237,12 @@ Vector2 Vector2::slerp(const Vector2 &p_b, real_t p_t) const {
 	return rotated(theta * p_t);
 }
 
+Vector2 Vector2::direction_to(const Vector2 &p_b) const {
+	Vector2 ret(p_b.x - x, p_b.y - y);
+	ret.normalize();
+	return ret;
+}
+
 Vector2 Vector2::linear_interpolate(const Vector2 &p_a, const Vector2 &p_b, real_t p_t) {
 
 	Vector2 res = p_a;
diff --git a/core/math/vector3.h b/core/math/vector3.h
index b11838d16e..e9074c5bd4 100644
--- a/core/math/vector3.h
+++ b/core/math/vector3.h
@@ -112,6 +112,7 @@ struct Vector3 {
 	_FORCE_INLINE_ Vector3 project(const Vector3 &p_b) const;
 
 	_FORCE_INLINE_ real_t angle_to(const Vector3 &p_b) const;
+	_FORCE_INLINE_ Vector3 direction_to(const Vector3 &p_b) const;
 
 	_FORCE_INLINE_ Vector3 slide(const Vector3 &p_normal) const;
 	_FORCE_INLINE_ Vector3 bounce(const Vector3 &p_normal) const;
@@ -244,6 +245,12 @@ real_t Vector3::angle_to(const Vector3 &p_b) const {
 	return Math::atan2(cross(p_b).length(), dot(p_b));
 }
 
+Vector3 Vector3::direction_to(const Vector3 &p_b) const {
+	Vector3 ret(p_b.x - x, p_b.y - y, p_b.z - z);
+	ret.normalize();
+	return ret;
+}
+
 /* Operators */
 
 Vector3 &Vector3::operator+=(const Vector3 &p_v) {
diff --git a/core/os/file_access.cpp b/core/os/file_access.cpp
index 39d9f45bd7..4be1364278 100644
--- a/core/os/file_access.cpp
+++ b/core/os/file_access.cpp
@@ -571,10 +571,16 @@ void FileAccess::store_buffer(const uint8_t *p_src, int p_length) {
 		store_8(p_src[i]);
 }
 
-Vector<uint8_t> FileAccess::get_file_as_array(const String &p_path) {
+Vector<uint8_t> FileAccess::get_file_as_array(const String &p_path, Error *r_error) {
 
-	FileAccess *f = FileAccess::open(p_path, READ);
-	ERR_FAIL_COND_V(!f, Vector<uint8_t>());
+	FileAccess *f = FileAccess::open(p_path, READ, r_error);
+	if (!f) {
+		if (r_error) { // if error requested, do not throw error
+			return Vector<uint8_t>();
+		} else {
+			ERR_FAIL_COND_V(!f, Vector<uint8_t>());
+		}
+	}
 	Vector<uint8_t> data;
 	data.resize(f->get_len());
 	f->get_buffer(data.ptrw(), data.size());
@@ -582,6 +588,26 @@ Vector<uint8_t> FileAccess::get_file_as_array(const String &p_path) {
 	return data;
 }
 
+String FileAccess::get_file_as_string(const String &p_path, Error *r_error) {
+
+	Error err;
+	Vector<uint8_t> array = get_file_as_array(p_path, &err);
+	if (r_error) {
+		*r_error = err;
+	}
+	if (err != OK) {
+		if (r_error) {
+			return String();
+		} else {
+			ERR_FAIL_COND_V(err != OK, String());
+		}
+	}
+
+	String ret;
+	ret.parse_utf8((const char *)array.ptr(), array.size());
+	return ret;
+}
+
 String FileAccess::get_md5(const String &p_file) {
 
 	FileAccess *f = FileAccess::open(p_file, READ);
diff --git a/core/os/file_access.h b/core/os/file_access.h
index c65b75369c..9df2a5cade 100644
--- a/core/os/file_access.h
+++ b/core/os/file_access.h
@@ -164,7 +164,8 @@ public:
 	static String get_sha256(const String &p_file);
 	static String get_multiple_md5(const Vector<String> &p_file);
 
-	static Vector<uint8_t> get_file_as_array(const String &p_path);
+	static Vector<uint8_t> get_file_as_array(const String &p_path, Error *r_error = NULL);
+	static String get_file_as_string(const String &p_path, Error *r_error = NULL);
 
 	template <class T>
 	static void make_default(AccessType p_access) {
diff --git a/core/project_settings.cpp b/core/project_settings.cpp
index 8c9a3dbcd4..5752cdca2b 100644
--- a/core/project_settings.cpp
+++ b/core/project_settings.cpp
@@ -1004,6 +1004,8 @@ ProjectSettings::ProjectSettings() {
 	GLOBAL_DEF("application/config/use_custom_user_dir", false);
 	GLOBAL_DEF("application/config/custom_user_dir_name", "");
 	GLOBAL_DEF("application/config/project_settings_override", "");
+	GLOBAL_DEF("audio/default_bus_layout", "res://default_bus_layout.tres");
+	custom_prop_info["audio/default_bus_layout"] = PropertyInfo(Variant::STRING, "audio/default_bus_layout", PROPERTY_HINT_FILE, "*.tres");
 
 	action = Dictionary();
 	action["deadzone"] = Variant(0.5f);
diff --git a/core/typedefs.h b/core/typedefs.h
index a3d7314b1c..660139b90a 100644
--- a/core/typedefs.h
+++ b/core/typedefs.h
@@ -331,7 +331,28 @@ struct _GlobalLock {
 /** This is needed due to a strange OpenGL API that expects a pointer
  *  type for an argument that is actually an offset.
  */
-
 #define CAST_INT_TO_UCHAR_PTR(ptr) ((uint8_t *)(uintptr_t)(ptr))
 
+/** Hint for compilers that this fallthrough in a switch is intentional.
+ *  Can be replaced by [[fallthrough]] annotation if we move to C++17.
+ *  Including conditional support for it for people who set -std=c++17
+ *  themselves.
+ *  Requires a trailing semicolon when used.
+ */
+#if __cplusplus >= 201703L
+#define FALLTHROUGH [[fallthrough]]
+#elif defined(__GNUC__) && __GNUC__ >= 7
+#define FALLTHROUGH __attribute__((fallthrough))
+#elif defined(__llvm__) && __cplusplus >= 201103L && defined(__has_feature)
+#if __has_feature(cxx_attributes) && defined(__has_warning)
+#if __has_warning("-Wimplicit-fallthrough")
+#define FALLTHROUGH [[clang::fallthrough]]
+#endif
+#endif
+#endif
+
+#ifndef FALLTHROUGH
+#define FALLTHROUGH
+#endif
+
 #endif // TYPEDEFS_H
diff --git a/core/ucaps.h b/core/ucaps.h
index 5dd81296dd..ae5729a53d 100644
--- a/core/ucaps.h
+++ b/core/ucaps.h
@@ -704,672 +704,672 @@ static const int caps_table[CAPS_LEN][2] = {
 };
 
 static const int reverse_caps_table[CAPS_LEN - 1][2] = {
-	{ 0x41, 0x61 },
-	{ 0x42, 0x62 },
-	{ 0x43, 0x63 },
-	{ 0x44, 0x64 },
-	{ 0x45, 0x65 },
-	{ 0x46, 0x66 },
-	{ 0x47, 0x67 },
-	{ 0x48, 0x68 },
-	{ 0x49, 0x69 },
-	{ 0x4a, 0x6a },
-	{ 0x4b, 0x6b },
-	{ 0x4c, 0x6c },
-	{ 0x4d, 0x6d },
-	{ 0x4e, 0x6e },
-	{ 0x4f, 0x6f },
-	{ 0x50, 0x70 },
-	{ 0x51, 0x71 },
-	{ 0x52, 0x72 },
-	{ 0x53, 0x73 },
-	{ 0x54, 0x74 },
-	{ 0x55, 0x75 },
-	{ 0x56, 0x76 },
-	{ 0x57, 0x77 },
-	{ 0x58, 0x78 },
-	{ 0x59, 0x79 },
-	{ 0x5a, 0x7a },
-	{ 0xc0, 0xe0 },
-	{ 0xc1, 0xe1 },
-	{ 0xc2, 0xe2 },
-	{ 0xc3, 0xe3 },
-	{ 0xc4, 0xe4 },
-	{ 0xc5, 0xe5 },
-	{ 0xc6, 0xe6 },
-	{ 0xc7, 0xe7 },
-	{ 0xc8, 0xe8 },
-	{ 0xc9, 0xe9 },
-	{ 0xca, 0xea },
-	{ 0xcb, 0xeb },
-	{ 0xcc, 0xec },
-	{ 0xcd, 0xed },
-	{ 0xce, 0xee },
-	{ 0xcf, 0xef },
-	{ 0xd0, 0xf0 },
-	{ 0xd1, 0xf1 },
-	{ 0xd2, 0xf2 },
-	{ 0xd3, 0xf3 },
-	{ 0xd4, 0xf4 },
-	{ 0xd5, 0xf5 },
-	{ 0xd6, 0xf6 },
-	{ 0xd8, 0xf8 },
-	{ 0xd9, 0xf9 },
-	{ 0xda, 0xfa },
-	{ 0xdb, 0xfb },
-	{ 0xdc, 0xfc },
-	{ 0xdd, 0xfd },
-	{ 0xde, 0xfe },
-	{ 0x178, 0xff },
-	{ 0x100, 0x101 },
-	{ 0x102, 0x103 },
-	{ 0x104, 0x105 },
-	{ 0x106, 0x107 },
-	{ 0x108, 0x109 },
-	{ 0x10a, 0x10b },
-	{ 0x10c, 0x10d },
-	{ 0x10e, 0x10f },
-	{ 0x110, 0x111 },
-	{ 0x112, 0x113 },
-	{ 0x114, 0x115 },
-	{ 0x116, 0x117 },
-	{ 0x118, 0x119 },
-	{ 0x11a, 0x11b },
-	{ 0x11c, 0x11d },
-	{ 0x11e, 0x11f },
-	{ 0x120, 0x121 },
-	{ 0x122, 0x123 },
-	{ 0x124, 0x125 },
-	{ 0x126, 0x127 },
-	{ 0x128, 0x129 },
-	{ 0x12a, 0x12b },
-	{ 0x12c, 0x12d },
-	{ 0x12e, 0x12f },
-	//{0x49,0x131},
-	{ 0x132, 0x133 },
-	{ 0x134, 0x135 },
-	{ 0x136, 0x137 },
-	{ 0x139, 0x13a },
-	{ 0x13b, 0x13c },
-	{ 0x13d, 0x13e },
-	{ 0x13f, 0x140 },
-	{ 0x141, 0x142 },
-	{ 0x143, 0x144 },
-	{ 0x145, 0x146 },
-	{ 0x147, 0x148 },
-	{ 0x14a, 0x14b },
-	{ 0x14c, 0x14d },
-	{ 0x14e, 0x14f },
-	{ 0x150, 0x151 },
-	{ 0x152, 0x153 },
-	{ 0x154, 0x155 },
-	{ 0x156, 0x157 },
-	{ 0x158, 0x159 },
-	{ 0x15a, 0x15b },
-	{ 0x15c, 0x15d },
-	{ 0x15e, 0x15f },
-	{ 0x160, 0x161 },
-	{ 0x162, 0x163 },
-	{ 0x164, 0x165 },
-	{ 0x166, 0x167 },
-	{ 0x168, 0x169 },
-	{ 0x16a, 0x16b },
-	{ 0x16c, 0x16d },
-	{ 0x16e, 0x16f },
-	{ 0x170, 0x171 },
-	{ 0x172, 0x173 },
-	{ 0x174, 0x175 },
-	{ 0x176, 0x177 },
-	{ 0x179, 0x17a },
-	{ 0x17b, 0x17c },
-	{ 0x17d, 0x17e },
-	{ 0x182, 0x183 },
-	{ 0x184, 0x185 },
-	{ 0x187, 0x188 },
-	{ 0x18b, 0x18c },
-	{ 0x191, 0x192 },
-	{ 0x198, 0x199 },
-	{ 0x1a0, 0x1a1 },
-	{ 0x1a2, 0x1a3 },
-	{ 0x1a4, 0x1a5 },
-	{ 0x1a7, 0x1a8 },
-	{ 0x1ac, 0x1ad },
-	{ 0x1af, 0x1b0 },
-	{ 0x1b3, 0x1b4 },
-	{ 0x1b5, 0x1b6 },
-	{ 0x1b8, 0x1b9 },
-	{ 0x1bc, 0x1bd },
-	{ 0x1c4, 0x1c6 },
-	{ 0x1c7, 0x1c9 },
-	{ 0x1ca, 0x1cc },
-	{ 0x1cd, 0x1ce },
-	{ 0x1cf, 0x1d0 },
-	{ 0x1d1, 0x1d2 },
-	{ 0x1d3, 0x1d4 },
-	{ 0x1d5, 0x1d6 },
-	{ 0x1d7, 0x1d8 },
-	{ 0x1d9, 0x1da },
-	{ 0x1db, 0x1dc },
-	{ 0x1de, 0x1df },
-	{ 0x1e0, 0x1e1 },
-	{ 0x1e2, 0x1e3 },
-	{ 0x1e4, 0x1e5 },
-	{ 0x1e6, 0x1e7 },
-	{ 0x1e8, 0x1e9 },
-	{ 0x1ea, 0x1eb },
-	{ 0x1ec, 0x1ed },
-	{ 0x1ee, 0x1ef },
-	{ 0x1f1, 0x1f3 },
-	{ 0x1f4, 0x1f5 },
-	{ 0x1fa, 0x1fb },
-	{ 0x1fc, 0x1fd },
-	{ 0x1fe, 0x1ff },
-	{ 0x200, 0x201 },
-	{ 0x202, 0x203 },
-	{ 0x204, 0x205 },
-	{ 0x206, 0x207 },
-	{ 0x208, 0x209 },
-	{ 0x20a, 0x20b },
-	{ 0x20c, 0x20d },
-	{ 0x20e, 0x20f },
-	{ 0x210, 0x211 },
-	{ 0x212, 0x213 },
-	{ 0x214, 0x215 },
-	{ 0x216, 0x217 },
-	{ 0x181, 0x253 },
-	{ 0x186, 0x254 },
-	{ 0x18a, 0x257 },
-	{ 0x18e, 0x258 },
-	{ 0x18f, 0x259 },
-	{ 0x190, 0x25b },
-	{ 0x193, 0x260 },
-	{ 0x194, 0x263 },
-	{ 0x197, 0x268 },
-	{ 0x196, 0x269 },
-	{ 0x19c, 0x26f },
-	{ 0x19d, 0x272 },
-	{ 0x19f, 0x275 },
-	{ 0x1a9, 0x283 },
-	{ 0x1ae, 0x288 },
-	{ 0x1b1, 0x28a },
-	{ 0x1b2, 0x28b },
-	{ 0x1b7, 0x292 },
-	{ 0x386, 0x3ac },
-	{ 0x388, 0x3ad },
-	{ 0x389, 0x3ae },
-	{ 0x38a, 0x3af },
-	{ 0x391, 0x3b1 },
-	{ 0x392, 0x3b2 },
-	{ 0x393, 0x3b3 },
-	{ 0x394, 0x3b4 },
-	{ 0x395, 0x3b5 },
-	{ 0x396, 0x3b6 },
-	{ 0x397, 0x3b7 },
-	{ 0x398, 0x3b8 },
-	{ 0x399, 0x3b9 },
-	{ 0x39a, 0x3ba },
-	{ 0x39b, 0x3bb },
-	{ 0x39c, 0x3bc },
-	{ 0x39d, 0x3bd },
-	{ 0x39e, 0x3be },
-	{ 0x39f, 0x3bf },
-	{ 0x3a0, 0x3c0 },
-	{ 0x3a1, 0x3c1 },
-	{ 0x3a3, 0x3c3 },
-	{ 0x3a4, 0x3c4 },
-	{ 0x3a5, 0x3c5 },
-	{ 0x3a6, 0x3c6 },
-	{ 0x3a7, 0x3c7 },
-	{ 0x3a8, 0x3c8 },
-	{ 0x3a9, 0x3c9 },
-	{ 0x3aa, 0x3ca },
-	{ 0x3ab, 0x3cb },
-	{ 0x38c, 0x3cc },
-	{ 0x38e, 0x3cd },
-	{ 0x38f, 0x3ce },
-	{ 0x3e2, 0x3e3 },
-	{ 0x3e4, 0x3e5 },
-	{ 0x3e6, 0x3e7 },
-	{ 0x3e8, 0x3e9 },
-	{ 0x3ea, 0x3eb },
-	{ 0x3ec, 0x3ed },
-	{ 0x3ee, 0x3ef },
-	{ 0x410, 0x430 },
-	{ 0x411, 0x431 },
-	{ 0x412, 0x432 },
-	{ 0x413, 0x433 },
-	{ 0x414, 0x434 },
-	{ 0x415, 0x435 },
-	{ 0x416, 0x436 },
-	{ 0x417, 0x437 },
-	{ 0x418, 0x438 },
-	{ 0x419, 0x439 },
-	{ 0x41a, 0x43a },
-	{ 0x41b, 0x43b },
-	{ 0x41c, 0x43c },
-	{ 0x41d, 0x43d },
-	{ 0x41e, 0x43e },
-	{ 0x41f, 0x43f },
-	{ 0x420, 0x440 },
-	{ 0x421, 0x441 },
-	{ 0x422, 0x442 },
-	{ 0x423, 0x443 },
-	{ 0x424, 0x444 },
-	{ 0x425, 0x445 },
-	{ 0x426, 0x446 },
-	{ 0x427, 0x447 },
-	{ 0x428, 0x448 },
-	{ 0x429, 0x449 },
-	{ 0x42a, 0x44a },
-	{ 0x42b, 0x44b },
-	{ 0x42c, 0x44c },
-	{ 0x42d, 0x44d },
-	{ 0x42e, 0x44e },
-	{ 0x42f, 0x44f },
-	{ 0x401, 0x451 },
-	{ 0x402, 0x452 },
-	{ 0x403, 0x453 },
-	{ 0x404, 0x454 },
-	{ 0x405, 0x455 },
-	{ 0x406, 0x456 },
-	{ 0x407, 0x457 },
-	{ 0x408, 0x458 },
-	{ 0x409, 0x459 },
-	{ 0x40a, 0x45a },
-	{ 0x40b, 0x45b },
-	{ 0x40c, 0x45c },
-	{ 0x40e, 0x45e },
-	{ 0x40f, 0x45f },
-	{ 0x460, 0x461 },
-	{ 0x462, 0x463 },
-	{ 0x464, 0x465 },
-	{ 0x466, 0x467 },
-	{ 0x468, 0x469 },
-	{ 0x46a, 0x46b },
-	{ 0x46c, 0x46d },
-	{ 0x46e, 0x46f },
-	{ 0x470, 0x471 },
-	{ 0x472, 0x473 },
-	{ 0x474, 0x475 },
-	{ 0x476, 0x477 },
-	{ 0x478, 0x479 },
-	{ 0x47a, 0x47b },
-	{ 0x47c, 0x47d },
-	{ 0x47e, 0x47f },
-	{ 0x480, 0x481 },
-	{ 0x490, 0x491 },
-	{ 0x492, 0x493 },
-	{ 0x494, 0x495 },
-	{ 0x496, 0x497 },
-	{ 0x498, 0x499 },
-	{ 0x49a, 0x49b },
-	{ 0x49c, 0x49d },
-	{ 0x49e, 0x49f },
-	{ 0x4a0, 0x4a1 },
-	{ 0x4a2, 0x4a3 },
-	{ 0x4a4, 0x4a5 },
-	{ 0x4a6, 0x4a7 },
-	{ 0x4a8, 0x4a9 },
-	{ 0x4aa, 0x4ab },
-	{ 0x4ac, 0x4ad },
-	{ 0x4ae, 0x4af },
-	{ 0x4b0, 0x4b1 },
-	{ 0x4b2, 0x4b3 },
-	{ 0x4b4, 0x4b5 },
-	{ 0x4b6, 0x4b7 },
-	{ 0x4b8, 0x4b9 },
-	{ 0x4ba, 0x4bb },
-	{ 0x4bc, 0x4bd },
-	{ 0x4be, 0x4bf },
-	{ 0x4c1, 0x4c2 },
-	{ 0x4c3, 0x4c4 },
-	{ 0x4c7, 0x4c8 },
-	{ 0x4cb, 0x4cc },
-	{ 0x4d0, 0x4d1 },
-	{ 0x4d2, 0x4d3 },
-	{ 0x4d4, 0x4d5 },
-	{ 0x4d6, 0x4d7 },
-	{ 0x4d8, 0x4d9 },
-	{ 0x4da, 0x4db },
-	{ 0x4dc, 0x4dd },
-	{ 0x4de, 0x4df },
-	{ 0x4e0, 0x4e1 },
-	{ 0x4e2, 0x4e3 },
-	{ 0x4e4, 0x4e5 },
-	{ 0x4e6, 0x4e7 },
-	{ 0x4e8, 0x4e9 },
-	{ 0x4ea, 0x4eb },
-	{ 0x4ee, 0x4ef },
-	{ 0x4f0, 0x4f1 },
-	{ 0x4f2, 0x4f3 },
-	{ 0x4f4, 0x4f5 },
-	{ 0x4f8, 0x4f9 },
-	{ 0x531, 0x561 },
-	{ 0x532, 0x562 },
-	{ 0x533, 0x563 },
-	{ 0x534, 0x564 },
-	{ 0x535, 0x565 },
-	{ 0x536, 0x566 },
-	{ 0x537, 0x567 },
-	{ 0x538, 0x568 },
-	{ 0x539, 0x569 },
-	{ 0x53a, 0x56a },
-	{ 0x53b, 0x56b },
-	{ 0x53c, 0x56c },
-	{ 0x53d, 0x56d },
-	{ 0x53e, 0x56e },
-	{ 0x53f, 0x56f },
-	{ 0x540, 0x570 },
-	{ 0x541, 0x571 },
-	{ 0x542, 0x572 },
-	{ 0x543, 0x573 },
-	{ 0x544, 0x574 },
-	{ 0x545, 0x575 },
-	{ 0x546, 0x576 },
-	{ 0x547, 0x577 },
-	{ 0x548, 0x578 },
-	{ 0x549, 0x579 },
-	{ 0x54a, 0x57a },
-	{ 0x54b, 0x57b },
-	{ 0x54c, 0x57c },
-	{ 0x54d, 0x57d },
-	{ 0x54e, 0x57e },
-	{ 0x54f, 0x57f },
-	{ 0x550, 0x580 },
-	{ 0x551, 0x581 },
-	{ 0x552, 0x582 },
-	{ 0x553, 0x583 },
-	{ 0x554, 0x584 },
-	{ 0x555, 0x585 },
-	{ 0x556, 0x586 },
-	{ 0x10a0, 0x10d0 },
-	{ 0x10a1, 0x10d1 },
-	{ 0x10a2, 0x10d2 },
-	{ 0x10a3, 0x10d3 },
-	{ 0x10a4, 0x10d4 },
-	{ 0x10a5, 0x10d5 },
-	{ 0x10a6, 0x10d6 },
-	{ 0x10a7, 0x10d7 },
-	{ 0x10a8, 0x10d8 },
-	{ 0x10a9, 0x10d9 },
-	{ 0x10aa, 0x10da },
-	{ 0x10ab, 0x10db },
-	{ 0x10ac, 0x10dc },
-	{ 0x10ad, 0x10dd },
-	{ 0x10ae, 0x10de },
-	{ 0x10af, 0x10df },
-	{ 0x10b0, 0x10e0 },
-	{ 0x10b1, 0x10e1 },
-	{ 0x10b2, 0x10e2 },
-	{ 0x10b3, 0x10e3 },
-	{ 0x10b4, 0x10e4 },
-	{ 0x10b5, 0x10e5 },
-	{ 0x10b6, 0x10e6 },
-	{ 0x10b7, 0x10e7 },
-	{ 0x10b8, 0x10e8 },
-	{ 0x10b9, 0x10e9 },
-	{ 0x10ba, 0x10ea },
-	{ 0x10bb, 0x10eb },
-	{ 0x10bc, 0x10ec },
-	{ 0x10bd, 0x10ed },
-	{ 0x10be, 0x10ee },
-	{ 0x10bf, 0x10ef },
-	{ 0x10c0, 0x10f0 },
-	{ 0x10c1, 0x10f1 },
-	{ 0x10c2, 0x10f2 },
-	{ 0x10c3, 0x10f3 },
-	{ 0x10c4, 0x10f4 },
-	{ 0x10c5, 0x10f5 },
-	{ 0x1e00, 0x1e01 },
-	{ 0x1e02, 0x1e03 },
-	{ 0x1e04, 0x1e05 },
-	{ 0x1e06, 0x1e07 },
-	{ 0x1e08, 0x1e09 },
-	{ 0x1e0a, 0x1e0b },
-	{ 0x1e0c, 0x1e0d },
-	{ 0x1e0e, 0x1e0f },
-	{ 0x1e10, 0x1e11 },
-	{ 0x1e12, 0x1e13 },
-	{ 0x1e14, 0x1e15 },
-	{ 0x1e16, 0x1e17 },
-	{ 0x1e18, 0x1e19 },
-	{ 0x1e1a, 0x1e1b },
-	{ 0x1e1c, 0x1e1d },
-	{ 0x1e1e, 0x1e1f },
-	{ 0x1e20, 0x1e21 },
-	{ 0x1e22, 0x1e23 },
-	{ 0x1e24, 0x1e25 },
-	{ 0x1e26, 0x1e27 },
-	{ 0x1e28, 0x1e29 },
-	{ 0x1e2a, 0x1e2b },
-	{ 0x1e2c, 0x1e2d },
-	{ 0x1e2e, 0x1e2f },
-	{ 0x1e30, 0x1e31 },
-	{ 0x1e32, 0x1e33 },
-	{ 0x1e34, 0x1e35 },
-	{ 0x1e36, 0x1e37 },
-	{ 0x1e38, 0x1e39 },
-	{ 0x1e3a, 0x1e3b },
-	{ 0x1e3c, 0x1e3d },
-	{ 0x1e3e, 0x1e3f },
-	{ 0x1e40, 0x1e41 },
-	{ 0x1e42, 0x1e43 },
-	{ 0x1e44, 0x1e45 },
-	{ 0x1e46, 0x1e47 },
-	{ 0x1e48, 0x1e49 },
-	{ 0x1e4a, 0x1e4b },
-	{ 0x1e4c, 0x1e4d },
-	{ 0x1e4e, 0x1e4f },
-	{ 0x1e50, 0x1e51 },
-	{ 0x1e52, 0x1e53 },
-	{ 0x1e54, 0x1e55 },
-	{ 0x1e56, 0x1e57 },
-	{ 0x1e58, 0x1e59 },
-	{ 0x1e5a, 0x1e5b },
-	{ 0x1e5c, 0x1e5d },
-	{ 0x1e5e, 0x1e5f },
-	{ 0x1e60, 0x1e61 },
-	{ 0x1e62, 0x1e63 },
-	{ 0x1e64, 0x1e65 },
-	{ 0x1e66, 0x1e67 },
-	{ 0x1e68, 0x1e69 },
-	{ 0x1e6a, 0x1e6b },
-	{ 0x1e6c, 0x1e6d },
-	{ 0x1e6e, 0x1e6f },
-	{ 0x1e70, 0x1e71 },
-	{ 0x1e72, 0x1e73 },
-	{ 0x1e74, 0x1e75 },
-	{ 0x1e76, 0x1e77 },
-	{ 0x1e78, 0x1e79 },
-	{ 0x1e7a, 0x1e7b },
-	{ 0x1e7c, 0x1e7d },
-	{ 0x1e7e, 0x1e7f },
-	{ 0x1e80, 0x1e81 },
-	{ 0x1e82, 0x1e83 },
-	{ 0x1e84, 0x1e85 },
-	{ 0x1e86, 0x1e87 },
-	{ 0x1e88, 0x1e89 },
-	{ 0x1e8a, 0x1e8b },
-	{ 0x1e8c, 0x1e8d },
-	{ 0x1e8e, 0x1e8f },
-	{ 0x1e90, 0x1e91 },
-	{ 0x1e92, 0x1e93 },
-	{ 0x1e94, 0x1e95 },
-	{ 0x1ea0, 0x1ea1 },
-	{ 0x1ea2, 0x1ea3 },
-	{ 0x1ea4, 0x1ea5 },
-	{ 0x1ea6, 0x1ea7 },
-	{ 0x1ea8, 0x1ea9 },
-	{ 0x1eaa, 0x1eab },
-	{ 0x1eac, 0x1ead },
-	{ 0x1eae, 0x1eaf },
-	{ 0x1eb0, 0x1eb1 },
-	{ 0x1eb2, 0x1eb3 },
-	{ 0x1eb4, 0x1eb5 },
-	{ 0x1eb6, 0x1eb7 },
-	{ 0x1eb8, 0x1eb9 },
-	{ 0x1eba, 0x1ebb },
-	{ 0x1ebc, 0x1ebd },
-	{ 0x1ebe, 0x1ebf },
-	{ 0x1ec0, 0x1ec1 },
-	{ 0x1ec2, 0x1ec3 },
-	{ 0x1ec4, 0x1ec5 },
-	{ 0x1ec6, 0x1ec7 },
-	{ 0x1ec8, 0x1ec9 },
-	{ 0x1eca, 0x1ecb },
-	{ 0x1ecc, 0x1ecd },
-	{ 0x1ece, 0x1ecf },
-	{ 0x1ed0, 0x1ed1 },
-	{ 0x1ed2, 0x1ed3 },
-	{ 0x1ed4, 0x1ed5 },
-	{ 0x1ed6, 0x1ed7 },
-	{ 0x1ed8, 0x1ed9 },
-	{ 0x1eda, 0x1edb },
-	{ 0x1edc, 0x1edd },
-	{ 0x1ede, 0x1edf },
-	{ 0x1ee0, 0x1ee1 },
-	{ 0x1ee2, 0x1ee3 },
-	{ 0x1ee4, 0x1ee5 },
-	{ 0x1ee6, 0x1ee7 },
-	{ 0x1ee8, 0x1ee9 },
-	{ 0x1eea, 0x1eeb },
-	{ 0x1eec, 0x1eed },
-	{ 0x1eee, 0x1eef },
-	{ 0x1ef0, 0x1ef1 },
-	{ 0x1ef2, 0x1ef3 },
-	{ 0x1ef4, 0x1ef5 },
-	{ 0x1ef6, 0x1ef7 },
-	{ 0x1ef8, 0x1ef9 },
-	{ 0x1f08, 0x1f00 },
-	{ 0x1f09, 0x1f01 },
-	{ 0x1f0a, 0x1f02 },
-	{ 0x1f0b, 0x1f03 },
-	{ 0x1f0c, 0x1f04 },
-	{ 0x1f0d, 0x1f05 },
-	{ 0x1f0e, 0x1f06 },
-	{ 0x1f0f, 0x1f07 },
-	{ 0x1f18, 0x1f10 },
-	{ 0x1f19, 0x1f11 },
-	{ 0x1f1a, 0x1f12 },
-	{ 0x1f1b, 0x1f13 },
-	{ 0x1f1c, 0x1f14 },
-	{ 0x1f1d, 0x1f15 },
-	{ 0x1f28, 0x1f20 },
-	{ 0x1f29, 0x1f21 },
-	{ 0x1f2a, 0x1f22 },
-	{ 0x1f2b, 0x1f23 },
-	{ 0x1f2c, 0x1f24 },
-	{ 0x1f2d, 0x1f25 },
-	{ 0x1f2e, 0x1f26 },
-	{ 0x1f2f, 0x1f27 },
-	{ 0x1f38, 0x1f30 },
-	{ 0x1f39, 0x1f31 },
-	{ 0x1f3a, 0x1f32 },
-	{ 0x1f3b, 0x1f33 },
-	{ 0x1f3c, 0x1f34 },
-	{ 0x1f3d, 0x1f35 },
-	{ 0x1f3e, 0x1f36 },
-	{ 0x1f3f, 0x1f37 },
-	{ 0x1f48, 0x1f40 },
-	{ 0x1f49, 0x1f41 },
-	{ 0x1f4a, 0x1f42 },
-	{ 0x1f4b, 0x1f43 },
-	{ 0x1f4c, 0x1f44 },
-	{ 0x1f4d, 0x1f45 },
-	{ 0x1f59, 0x1f51 },
-	{ 0x1f5b, 0x1f53 },
-	{ 0x1f5d, 0x1f55 },
-	{ 0x1f5f, 0x1f57 },
-	{ 0x1f68, 0x1f60 },
-	{ 0x1f69, 0x1f61 },
-	{ 0x1f6a, 0x1f62 },
-	{ 0x1f6b, 0x1f63 },
-	{ 0x1f6c, 0x1f64 },
-	{ 0x1f6d, 0x1f65 },
-	{ 0x1f6e, 0x1f66 },
-	{ 0x1f6f, 0x1f67 },
-	{ 0x1f88, 0x1f80 },
-	{ 0x1f89, 0x1f81 },
-	{ 0x1f8a, 0x1f82 },
-	{ 0x1f8b, 0x1f83 },
-	{ 0x1f8c, 0x1f84 },
-	{ 0x1f8d, 0x1f85 },
-	{ 0x1f8e, 0x1f86 },
-	{ 0x1f8f, 0x1f87 },
-	{ 0x1f98, 0x1f90 },
-	{ 0x1f99, 0x1f91 },
-	{ 0x1f9a, 0x1f92 },
-	{ 0x1f9b, 0x1f93 },
-	{ 0x1f9c, 0x1f94 },
-	{ 0x1f9d, 0x1f95 },
-	{ 0x1f9e, 0x1f96 },
-	{ 0x1f9f, 0x1f97 },
-	{ 0x1fa8, 0x1fa0 },
-	{ 0x1fa9, 0x1fa1 },
-	{ 0x1faa, 0x1fa2 },
-	{ 0x1fab, 0x1fa3 },
-	{ 0x1fac, 0x1fa4 },
-	{ 0x1fad, 0x1fa5 },
-	{ 0x1fae, 0x1fa6 },
-	{ 0x1faf, 0x1fa7 },
-	{ 0x1fb8, 0x1fb0 },
-	{ 0x1fb9, 0x1fb1 },
-	{ 0x1fd8, 0x1fd0 },
-	{ 0x1fd9, 0x1fd1 },
-	{ 0x1fe8, 0x1fe0 },
-	{ 0x1fe9, 0x1fe1 },
-	{ 0x24b6, 0x24d0 },
-	{ 0x24b7, 0x24d1 },
-	{ 0x24b8, 0x24d2 },
-	{ 0x24b9, 0x24d3 },
-	{ 0x24ba, 0x24d4 },
-	{ 0x24bb, 0x24d5 },
-	{ 0x24bc, 0x24d6 },
-	{ 0x24bd, 0x24d7 },
-	{ 0x24be, 0x24d8 },
-	{ 0x24bf, 0x24d9 },
-	{ 0x24c0, 0x24da },
-	{ 0x24c1, 0x24db },
-	{ 0x24c2, 0x24dc },
-	{ 0x24c3, 0x24dd },
-	{ 0x24c4, 0x24de },
-	{ 0x24c5, 0x24df },
-	{ 0x24c6, 0x24e0 },
-	{ 0x24c7, 0x24e1 },
-	{ 0x24c8, 0x24e2 },
-	{ 0x24c9, 0x24e3 },
-	{ 0x24ca, 0x24e4 },
-	{ 0x24cb, 0x24e5 },
-	{ 0x24cc, 0x24e6 },
-	{ 0x24cd, 0x24e7 },
-	{ 0x24ce, 0x24e8 },
-	{ 0x24cf, 0x24e9 },
-	{ 0xff21, 0xff41 },
-	{ 0xff22, 0xff42 },
-	{ 0xff23, 0xff43 },
-	{ 0xff24, 0xff44 },
-	{ 0xff25, 0xff45 },
-	{ 0xff26, 0xff46 },
-	{ 0xff27, 0xff47 },
-	{ 0xff28, 0xff48 },
-	{ 0xff29, 0xff49 },
-	{ 0xff2a, 0xff4a },
-	{ 0xff2b, 0xff4b },
-	{ 0xff2c, 0xff4c },
-	{ 0xff2d, 0xff4d },
-	{ 0xff2e, 0xff4e },
-	{ 0xff2f, 0xff4f },
-	{ 0xff30, 0xff50 },
-	{ 0xff31, 0xff51 },
-	{ 0xff32, 0xff52 },
-	{ 0xff33, 0xff53 },
-	{ 0xff34, 0xff54 },
-	{ 0xff35, 0xff55 },
-	{ 0xff36, 0xff56 },
-	{ 0xff37, 0xff57 },
-	{ 0xff38, 0xff58 },
-	{ 0xff39, 0xff59 },
-	{ 0xff3a, 0xff5a }
+	{ 0x0041, 0x0061 },
+	{ 0x0042, 0x0062 },
+	{ 0x0043, 0x0063 },
+	{ 0x0044, 0x0064 },
+	{ 0x0045, 0x0065 },
+	{ 0x0046, 0x0066 },
+	{ 0x0047, 0x0067 },
+	{ 0x0048, 0x0068 },
+	{ 0x0049, 0x0069 },
+	// { 0x0049, 0x0131 }, // dotless I
+	{ 0x004A, 0x006A },
+	{ 0x004B, 0x006B },
+	{ 0x004C, 0x006C },
+	{ 0x004D, 0x006D },
+	{ 0x004E, 0x006E },
+	{ 0x004F, 0x006F },
+	{ 0x0050, 0x0070 },
+	{ 0x0051, 0x0071 },
+	{ 0x0052, 0x0072 },
+	{ 0x0053, 0x0073 },
+	{ 0x0054, 0x0074 },
+	{ 0x0055, 0x0075 },
+	{ 0x0056, 0x0076 },
+	{ 0x0057, 0x0077 },
+	{ 0x0058, 0x0078 },
+	{ 0x0059, 0x0079 },
+	{ 0x005A, 0x007A },
+	{ 0x00C0, 0x00E0 },
+	{ 0x00C1, 0x00E1 },
+	{ 0x00C2, 0x00E2 },
+	{ 0x00C3, 0x00E3 },
+	{ 0x00C4, 0x00E4 },
+	{ 0x00C5, 0x00E5 },
+	{ 0x00C6, 0x00E6 },
+	{ 0x00C7, 0x00E7 },
+	{ 0x00C8, 0x00E8 },
+	{ 0x00C9, 0x00E9 },
+	{ 0x00CA, 0x00EA },
+	{ 0x00CB, 0x00EB },
+	{ 0x00CC, 0x00EC },
+	{ 0x00CD, 0x00ED },
+	{ 0x00CE, 0x00EE },
+	{ 0x00CF, 0x00EF },
+	{ 0x00D0, 0x00F0 },
+	{ 0x00D1, 0x00F1 },
+	{ 0x00D2, 0x00F2 },
+	{ 0x00D3, 0x00F3 },
+	{ 0x00D4, 0x00F4 },
+	{ 0x00D5, 0x00F5 },
+	{ 0x00D6, 0x00F6 },
+	{ 0x00D8, 0x00F8 },
+	{ 0x00D9, 0x00F9 },
+	{ 0x00DA, 0x00FA },
+	{ 0x00DB, 0x00FB },
+	{ 0x00DC, 0x00FC },
+	{ 0x00DD, 0x00FD },
+	{ 0x00DE, 0x00FE },
+	{ 0x0100, 0x0101 },
+	{ 0x0102, 0x0103 },
+	{ 0x0104, 0x0105 },
+	{ 0x0106, 0x0107 },
+	{ 0x0108, 0x0109 },
+	{ 0x010A, 0x010B },
+	{ 0x010C, 0x010D },
+	{ 0x010E, 0x010F },
+	{ 0x0110, 0x0111 },
+	{ 0x0112, 0x0113 },
+	{ 0x0114, 0x0115 },
+	{ 0x0116, 0x0117 },
+	{ 0x0118, 0x0119 },
+	{ 0x011A, 0x011B },
+	{ 0x011C, 0x011D },
+	{ 0x011E, 0x011F },
+	{ 0x0120, 0x0121 },
+	{ 0x0122, 0x0123 },
+	{ 0x0124, 0x0125 },
+	{ 0x0126, 0x0127 },
+	{ 0x0128, 0x0129 },
+	{ 0x012A, 0x012B },
+	{ 0x012C, 0x012D },
+	{ 0x012E, 0x012F },
+	{ 0x0132, 0x0133 },
+	{ 0x0134, 0x0135 },
+	{ 0x0136, 0x0137 },
+	{ 0x0139, 0x013A },
+	{ 0x013B, 0x013C },
+	{ 0x013D, 0x013E },
+	{ 0x013F, 0x0140 },
+	{ 0x0141, 0x0142 },
+	{ 0x0143, 0x0144 },
+	{ 0x0145, 0x0146 },
+	{ 0x0147, 0x0148 },
+	{ 0x014A, 0x014B },
+	{ 0x014C, 0x014D },
+	{ 0x014E, 0x014F },
+	{ 0x0150, 0x0151 },
+	{ 0x0152, 0x0153 },
+	{ 0x0154, 0x0155 },
+	{ 0x0156, 0x0157 },
+	{ 0x0158, 0x0159 },
+	{ 0x015A, 0x015B },
+	{ 0x015C, 0x015D },
+	{ 0x015E, 0x015F },
+	{ 0x0160, 0x0161 },
+	{ 0x0162, 0x0163 },
+	{ 0x0164, 0x0165 },
+	{ 0x0166, 0x0167 },
+	{ 0x0168, 0x0169 },
+	{ 0x016A, 0x016B },
+	{ 0x016C, 0x016D },
+	{ 0x016E, 0x016F },
+	{ 0x0170, 0x0171 },
+	{ 0x0172, 0x0173 },
+	{ 0x0174, 0x0175 },
+	{ 0x0176, 0x0177 },
+	{ 0x0178, 0x00FF },
+	{ 0x0179, 0x017A },
+	{ 0x017B, 0x017C },
+	{ 0x017D, 0x017E },
+	{ 0x0181, 0x0253 },
+	{ 0x0182, 0x0183 },
+	{ 0x0184, 0x0185 },
+	{ 0x0186, 0x0254 },
+	{ 0x0187, 0x0188 },
+	{ 0x018A, 0x0257 },
+	{ 0x018B, 0x018C },
+	{ 0x018E, 0x0258 },
+	{ 0x018F, 0x0259 },
+	{ 0x0190, 0x025B },
+	{ 0x0191, 0x0192 },
+	{ 0x0193, 0x0260 },
+	{ 0x0194, 0x0263 },
+	{ 0x0196, 0x0269 },
+	{ 0x0197, 0x0268 },
+	{ 0x0198, 0x0199 },
+	{ 0x019C, 0x026F },
+	{ 0x019D, 0x0272 },
+	{ 0x019F, 0x0275 },
+	{ 0x01A0, 0x01A1 },
+	{ 0x01A2, 0x01A3 },
+	{ 0x01A4, 0x01A5 },
+	{ 0x01A7, 0x01A8 },
+	{ 0x01A9, 0x0283 },
+	{ 0x01AC, 0x01AD },
+	{ 0x01AE, 0x0288 },
+	{ 0x01AF, 0x01B0 },
+	{ 0x01B1, 0x028A },
+	{ 0x01B2, 0x028B },
+	{ 0x01B3, 0x01B4 },
+	{ 0x01B5, 0x01B6 },
+	{ 0x01B7, 0x0292 },
+	{ 0x01B8, 0x01B9 },
+	{ 0x01BC, 0x01BD },
+	{ 0x01C4, 0x01C6 },
+	{ 0x01C7, 0x01C9 },
+	{ 0x01CA, 0x01CC },
+	{ 0x01CD, 0x01CE },
+	{ 0x01CF, 0x01D0 },
+	{ 0x01D1, 0x01D2 },
+	{ 0x01D3, 0x01D4 },
+	{ 0x01D5, 0x01D6 },
+	{ 0x01D7, 0x01D8 },
+	{ 0x01D9, 0x01DA },
+	{ 0x01DB, 0x01DC },
+	{ 0x01DE, 0x01DF },
+	{ 0x01E0, 0x01E1 },
+	{ 0x01E2, 0x01E3 },
+	{ 0x01E4, 0x01E5 },
+	{ 0x01E6, 0x01E7 },
+	{ 0x01E8, 0x01E9 },
+	{ 0x01EA, 0x01EB },
+	{ 0x01EC, 0x01ED },
+	{ 0x01EE, 0x01EF },
+	{ 0x01F1, 0x01F3 },
+	{ 0x01F4, 0x01F5 },
+	{ 0x01FA, 0x01FB },
+	{ 0x01FC, 0x01FD },
+	{ 0x01FE, 0x01FF },
+	{ 0x0200, 0x0201 },
+	{ 0x0202, 0x0203 },
+	{ 0x0204, 0x0205 },
+	{ 0x0206, 0x0207 },
+	{ 0x0208, 0x0209 },
+	{ 0x020A, 0x020B },
+	{ 0x020C, 0x020D },
+	{ 0x020E, 0x020F },
+	{ 0x0210, 0x0211 },
+	{ 0x0212, 0x0213 },
+	{ 0x0214, 0x0215 },
+	{ 0x0216, 0x0217 },
+	{ 0x0386, 0x03AC },
+	{ 0x0388, 0x03AD },
+	{ 0x0389, 0x03AE },
+	{ 0x038A, 0x03AF },
+	{ 0x038C, 0x03CC },
+	{ 0x038E, 0x03CD },
+	{ 0x038F, 0x03CE },
+	{ 0x0391, 0x03B1 },
+	{ 0x0392, 0x03B2 },
+	{ 0x0393, 0x03B3 },
+	{ 0x0394, 0x03B4 },
+	{ 0x0395, 0x03B5 },
+	{ 0x0396, 0x03B6 },
+	{ 0x0397, 0x03B7 },
+	{ 0x0398, 0x03B8 },
+	{ 0x0399, 0x03B9 },
+	{ 0x039A, 0x03BA },
+	{ 0x039B, 0x03BB },
+	{ 0x039C, 0x03BC },
+	{ 0x039D, 0x03BD },
+	{ 0x039E, 0x03BE },
+	{ 0x039F, 0x03BF },
+	{ 0x03A0, 0x03C0 },
+	{ 0x03A1, 0x03C1 },
+	{ 0x03A3, 0x03C3 },
+	{ 0x03A4, 0x03C4 },
+	{ 0x03A5, 0x03C5 },
+	{ 0x03A6, 0x03C6 },
+	{ 0x03A7, 0x03C7 },
+	{ 0x03A8, 0x03C8 },
+	{ 0x03A9, 0x03C9 },
+	{ 0x03AA, 0x03CA },
+	{ 0x03AB, 0x03CB },
+	{ 0x03E2, 0x03E3 },
+	{ 0x03E4, 0x03E5 },
+	{ 0x03E6, 0x03E7 },
+	{ 0x03E8, 0x03E9 },
+	{ 0x03EA, 0x03EB },
+	{ 0x03EC, 0x03ED },
+	{ 0x03EE, 0x03EF },
+	{ 0x0401, 0x0451 },
+	{ 0x0402, 0x0452 },
+	{ 0x0403, 0x0453 },
+	{ 0x0404, 0x0454 },
+	{ 0x0405, 0x0455 },
+	{ 0x0406, 0x0456 },
+	{ 0x0407, 0x0457 },
+	{ 0x0408, 0x0458 },
+	{ 0x0409, 0x0459 },
+	{ 0x040A, 0x045A },
+	{ 0x040B, 0x045B },
+	{ 0x040C, 0x045C },
+	{ 0x040E, 0x045E },
+	{ 0x040F, 0x045F },
+	{ 0x0410, 0x0430 },
+	{ 0x0411, 0x0431 },
+	{ 0x0412, 0x0432 },
+	{ 0x0413, 0x0433 },
+	{ 0x0414, 0x0434 },
+	{ 0x0415, 0x0435 },
+	{ 0x0416, 0x0436 },
+	{ 0x0417, 0x0437 },
+	{ 0x0418, 0x0438 },
+	{ 0x0419, 0x0439 },
+	{ 0x041A, 0x043A },
+	{ 0x041B, 0x043B },
+	{ 0x041C, 0x043C },
+	{ 0x041D, 0x043D },
+	{ 0x041E, 0x043E },
+	{ 0x041F, 0x043F },
+	{ 0x0420, 0x0440 },
+	{ 0x0421, 0x0441 },
+	{ 0x0422, 0x0442 },
+	{ 0x0423, 0x0443 },
+	{ 0x0424, 0x0444 },
+	{ 0x0425, 0x0445 },
+	{ 0x0426, 0x0446 },
+	{ 0x0427, 0x0447 },
+	{ 0x0428, 0x0448 },
+	{ 0x0429, 0x0449 },
+	{ 0x042A, 0x044A },
+	{ 0x042B, 0x044B },
+	{ 0x042C, 0x044C },
+	{ 0x042D, 0x044D },
+	{ 0x042E, 0x044E },
+	{ 0x042F, 0x044F },
+	{ 0x0460, 0x0461 },
+	{ 0x0462, 0x0463 },
+	{ 0x0464, 0x0465 },
+	{ 0x0466, 0x0467 },
+	{ 0x0468, 0x0469 },
+	{ 0x046A, 0x046B },
+	{ 0x046C, 0x046D },
+	{ 0x046E, 0x046F },
+	{ 0x0470, 0x0471 },
+	{ 0x0472, 0x0473 },
+	{ 0x0474, 0x0475 },
+	{ 0x0476, 0x0477 },
+	{ 0x0478, 0x0479 },
+	{ 0x047A, 0x047B },
+	{ 0x047C, 0x047D },
+	{ 0x047E, 0x047F },
+	{ 0x0480, 0x0481 },
+	{ 0x0490, 0x0491 },
+	{ 0x0492, 0x0493 },
+	{ 0x0494, 0x0495 },
+	{ 0x0496, 0x0497 },
+	{ 0x0498, 0x0499 },
+	{ 0x049A, 0x049B },
+	{ 0x049C, 0x049D },
+	{ 0x049E, 0x049F },
+	{ 0x04A0, 0x04A1 },
+	{ 0x04A2, 0x04A3 },
+	{ 0x04A4, 0x04A5 },
+	{ 0x04A6, 0x04A7 },
+	{ 0x04A8, 0x04A9 },
+	{ 0x04AA, 0x04AB },
+	{ 0x04AC, 0x04AD },
+	{ 0x04AE, 0x04AF },
+	{ 0x04B0, 0x04B1 },
+	{ 0x04B2, 0x04B3 },
+	{ 0x04B4, 0x04B5 },
+	{ 0x04B6, 0x04B7 },
+	{ 0x04B8, 0x04B9 },
+	{ 0x04BA, 0x04BB },
+	{ 0x04BC, 0x04BD },
+	{ 0x04BE, 0x04BF },
+	{ 0x04C1, 0x04C2 },
+	{ 0x04C3, 0x04C4 },
+	{ 0x04C7, 0x04C8 },
+	{ 0x04CB, 0x04CC },
+	{ 0x04D0, 0x04D1 },
+	{ 0x04D2, 0x04D3 },
+	{ 0x04D4, 0x04D5 },
+	{ 0x04D6, 0x04D7 },
+	{ 0x04D8, 0x04D9 },
+	{ 0x04DA, 0x04DB },
+	{ 0x04DC, 0x04DD },
+	{ 0x04DE, 0x04DF },
+	{ 0x04E0, 0x04E1 },
+	{ 0x04E2, 0x04E3 },
+	{ 0x04E4, 0x04E5 },
+	{ 0x04E6, 0x04E7 },
+	{ 0x04E8, 0x04E9 },
+	{ 0x04EA, 0x04EB },
+	{ 0x04EE, 0x04EF },
+	{ 0x04F0, 0x04F1 },
+	{ 0x04F2, 0x04F3 },
+	{ 0x04F4, 0x04F5 },
+	{ 0x04F8, 0x04F9 },
+	{ 0x0531, 0x0561 },
+	{ 0x0532, 0x0562 },
+	{ 0x0533, 0x0563 },
+	{ 0x0534, 0x0564 },
+	{ 0x0535, 0x0565 },
+	{ 0x0536, 0x0566 },
+	{ 0x0537, 0x0567 },
+	{ 0x0538, 0x0568 },
+	{ 0x0539, 0x0569 },
+	{ 0x053A, 0x056A },
+	{ 0x053B, 0x056B },
+	{ 0x053C, 0x056C },
+	{ 0x053D, 0x056D },
+	{ 0x053E, 0x056E },
+	{ 0x053F, 0x056F },
+	{ 0x0540, 0x0570 },
+	{ 0x0541, 0x0571 },
+	{ 0x0542, 0x0572 },
+	{ 0x0543, 0x0573 },
+	{ 0x0544, 0x0574 },
+	{ 0x0545, 0x0575 },
+	{ 0x0546, 0x0576 },
+	{ 0x0547, 0x0577 },
+	{ 0x0548, 0x0578 },
+	{ 0x0549, 0x0579 },
+	{ 0x054A, 0x057A },
+	{ 0x054B, 0x057B },
+	{ 0x054C, 0x057C },
+	{ 0x054D, 0x057D },
+	{ 0x054E, 0x057E },
+	{ 0x054F, 0x057F },
+	{ 0x0550, 0x0580 },
+	{ 0x0551, 0x0581 },
+	{ 0x0552, 0x0582 },
+	{ 0x0553, 0x0583 },
+	{ 0x0554, 0x0584 },
+	{ 0x0555, 0x0585 },
+	{ 0x0556, 0x0586 },
+	{ 0x10A0, 0x10D0 },
+	{ 0x10A1, 0x10D1 },
+	{ 0x10A2, 0x10D2 },
+	{ 0x10A3, 0x10D3 },
+	{ 0x10A4, 0x10D4 },
+	{ 0x10A5, 0x10D5 },
+	{ 0x10A6, 0x10D6 },
+	{ 0x10A7, 0x10D7 },
+	{ 0x10A8, 0x10D8 },
+	{ 0x10A9, 0x10D9 },
+	{ 0x10AA, 0x10DA },
+	{ 0x10AB, 0x10DB },
+	{ 0x10AC, 0x10DC },
+	{ 0x10AD, 0x10DD },
+	{ 0x10AE, 0x10DE },
+	{ 0x10AF, 0x10DF },
+	{ 0x10B0, 0x10E0 },
+	{ 0x10B1, 0x10E1 },
+	{ 0x10B2, 0x10E2 },
+	{ 0x10B3, 0x10E3 },
+	{ 0x10B4, 0x10E4 },
+	{ 0x10B5, 0x10E5 },
+	{ 0x10B6, 0x10E6 },
+	{ 0x10B7, 0x10E7 },
+	{ 0x10B8, 0x10E8 },
+	{ 0x10B9, 0x10E9 },
+	{ 0x10BA, 0x10EA },
+	{ 0x10BB, 0x10EB },
+	{ 0x10BC, 0x10EC },
+	{ 0x10BD, 0x10ED },
+	{ 0x10BE, 0x10EE },
+	{ 0x10BF, 0x10EF },
+	{ 0x10C0, 0x10F0 },
+	{ 0x10C1, 0x10F1 },
+	{ 0x10C2, 0x10F2 },
+	{ 0x10C3, 0x10F3 },
+	{ 0x10C4, 0x10F4 },
+	{ 0x10C5, 0x10F5 },
+	{ 0x1E00, 0x1E01 },
+	{ 0x1E02, 0x1E03 },
+	{ 0x1E04, 0x1E05 },
+	{ 0x1E06, 0x1E07 },
+	{ 0x1E08, 0x1E09 },
+	{ 0x1E0A, 0x1E0B },
+	{ 0x1E0C, 0x1E0D },
+	{ 0x1E0E, 0x1E0F },
+	{ 0x1E10, 0x1E11 },
+	{ 0x1E12, 0x1E13 },
+	{ 0x1E14, 0x1E15 },
+	{ 0x1E16, 0x1E17 },
+	{ 0x1E18, 0x1E19 },
+	{ 0x1E1A, 0x1E1B },
+	{ 0x1E1C, 0x1E1D },
+	{ 0x1E1E, 0x1E1F },
+	{ 0x1E20, 0x1E21 },
+	{ 0x1E22, 0x1E23 },
+	{ 0x1E24, 0x1E25 },
+	{ 0x1E26, 0x1E27 },
+	{ 0x1E28, 0x1E29 },
+	{ 0x1E2A, 0x1E2B },
+	{ 0x1E2C, 0x1E2D },
+	{ 0x1E2E, 0x1E2F },
+	{ 0x1E30, 0x1E31 },
+	{ 0x1E32, 0x1E33 },
+	{ 0x1E34, 0x1E35 },
+	{ 0x1E36, 0x1E37 },
+	{ 0x1E38, 0x1E39 },
+	{ 0x1E3A, 0x1E3B },
+	{ 0x1E3C, 0x1E3D },
+	{ 0x1E3E, 0x1E3F },
+	{ 0x1E40, 0x1E41 },
+	{ 0x1E42, 0x1E43 },
+	{ 0x1E44, 0x1E45 },
+	{ 0x1E46, 0x1E47 },
+	{ 0x1E48, 0x1E49 },
+	{ 0x1E4A, 0x1E4B },
+	{ 0x1E4C, 0x1E4D },
+	{ 0x1E4E, 0x1E4F },
+	{ 0x1E50, 0x1E51 },
+	{ 0x1E52, 0x1E53 },
+	{ 0x1E54, 0x1E55 },
+	{ 0x1E56, 0x1E57 },
+	{ 0x1E58, 0x1E59 },
+	{ 0x1E5A, 0x1E5B },
+	{ 0x1E5C, 0x1E5D },
+	{ 0x1E5E, 0x1E5F },
+	{ 0x1E60, 0x1E61 },
+	{ 0x1E62, 0x1E63 },
+	{ 0x1E64, 0x1E65 },
+	{ 0x1E66, 0x1E67 },
+	{ 0x1E68, 0x1E69 },
+	{ 0x1E6A, 0x1E6B },
+	{ 0x1E6C, 0x1E6D },
+	{ 0x1E6E, 0x1E6F },
+	{ 0x1E70, 0x1E71 },
+	{ 0x1E72, 0x1E73 },
+	{ 0x1E74, 0x1E75 },
+	{ 0x1E76, 0x1E77 },
+	{ 0x1E78, 0x1E79 },
+	{ 0x1E7A, 0x1E7B },
+	{ 0x1E7C, 0x1E7D },
+	{ 0x1E7E, 0x1E7F },
+	{ 0x1E80, 0x1E81 },
+	{ 0x1E82, 0x1E83 },
+	{ 0x1E84, 0x1E85 },
+	{ 0x1E86, 0x1E87 },
+	{ 0x1E88, 0x1E89 },
+	{ 0x1E8A, 0x1E8B },
+	{ 0x1E8C, 0x1E8D },
+	{ 0x1E8E, 0x1E8F },
+	{ 0x1E90, 0x1E91 },
+	{ 0x1E92, 0x1E93 },
+	{ 0x1E94, 0x1E95 },
+	{ 0x1EA0, 0x1EA1 },
+	{ 0x1EA2, 0x1EA3 },
+	{ 0x1EA4, 0x1EA5 },
+	{ 0x1EA6, 0x1EA7 },
+	{ 0x1EA8, 0x1EA9 },
+	{ 0x1EAA, 0x1EAB },
+	{ 0x1EAC, 0x1EAD },
+	{ 0x1EAE, 0x1EAF },
+	{ 0x1EB0, 0x1EB1 },
+	{ 0x1EB2, 0x1EB3 },
+	{ 0x1EB4, 0x1EB5 },
+	{ 0x1EB6, 0x1EB7 },
+	{ 0x1EB8, 0x1EB9 },
+	{ 0x1EBA, 0x1EBB },
+	{ 0x1EBC, 0x1EBD },
+	{ 0x1EBE, 0x1EBF },
+	{ 0x1EC0, 0x1EC1 },
+	{ 0x1EC2, 0x1EC3 },
+	{ 0x1EC4, 0x1EC5 },
+	{ 0x1EC6, 0x1EC7 },
+	{ 0x1EC8, 0x1EC9 },
+	{ 0x1ECA, 0x1ECB },
+	{ 0x1ECC, 0x1ECD },
+	{ 0x1ECE, 0x1ECF },
+	{ 0x1ED0, 0x1ED1 },
+	{ 0x1ED2, 0x1ED3 },
+	{ 0x1ED4, 0x1ED5 },
+	{ 0x1ED6, 0x1ED7 },
+	{ 0x1ED8, 0x1ED9 },
+	{ 0x1EDA, 0x1EDB },
+	{ 0x1EDC, 0x1EDD },
+	{ 0x1EDE, 0x1EDF },
+	{ 0x1EE0, 0x1EE1 },
+	{ 0x1EE2, 0x1EE3 },
+	{ 0x1EE4, 0x1EE5 },
+	{ 0x1EE6, 0x1EE7 },
+	{ 0x1EE8, 0x1EE9 },
+	{ 0x1EEA, 0x1EEB },
+	{ 0x1EEC, 0x1EED },
+	{ 0x1EEE, 0x1EEF },
+	{ 0x1EF0, 0x1EF1 },
+	{ 0x1EF2, 0x1EF3 },
+	{ 0x1EF4, 0x1EF5 },
+	{ 0x1EF6, 0x1EF7 },
+	{ 0x1EF8, 0x1EF9 },
+	{ 0x1F08, 0x1F00 },
+	{ 0x1F09, 0x1F01 },
+	{ 0x1F0A, 0x1F02 },
+	{ 0x1F0B, 0x1F03 },
+	{ 0x1F0C, 0x1F04 },
+	{ 0x1F0D, 0x1F05 },
+	{ 0x1F0E, 0x1F06 },
+	{ 0x1F0F, 0x1F07 },
+	{ 0x1F18, 0x1F10 },
+	{ 0x1F19, 0x1F11 },
+	{ 0x1F1A, 0x1F12 },
+	{ 0x1F1B, 0x1F13 },
+	{ 0x1F1C, 0x1F14 },
+	{ 0x1F1D, 0x1F15 },
+	{ 0x1F28, 0x1F20 },
+	{ 0x1F29, 0x1F21 },
+	{ 0x1F2A, 0x1F22 },
+	{ 0x1F2B, 0x1F23 },
+	{ 0x1F2C, 0x1F24 },
+	{ 0x1F2D, 0x1F25 },
+	{ 0x1F2E, 0x1F26 },
+	{ 0x1F2F, 0x1F27 },
+	{ 0x1F38, 0x1F30 },
+	{ 0x1F39, 0x1F31 },
+	{ 0x1F3A, 0x1F32 },
+	{ 0x1F3B, 0x1F33 },
+	{ 0x1F3C, 0x1F34 },
+	{ 0x1F3D, 0x1F35 },
+	{ 0x1F3E, 0x1F36 },
+	{ 0x1F3F, 0x1F37 },
+	{ 0x1F48, 0x1F40 },
+	{ 0x1F49, 0x1F41 },
+	{ 0x1F4A, 0x1F42 },
+	{ 0x1F4B, 0x1F43 },
+	{ 0x1F4C, 0x1F44 },
+	{ 0x1F4D, 0x1F45 },
+	{ 0x1F59, 0x1F51 },
+	{ 0x1F5B, 0x1F53 },
+	{ 0x1F5D, 0x1F55 },
+	{ 0x1F5F, 0x1F57 },
+	{ 0x1F68, 0x1F60 },
+	{ 0x1F69, 0x1F61 },
+	{ 0x1F6A, 0x1F62 },
+	{ 0x1F6B, 0x1F63 },
+	{ 0x1F6C, 0x1F64 },
+	{ 0x1F6D, 0x1F65 },
+	{ 0x1F6E, 0x1F66 },
+	{ 0x1F6F, 0x1F67 },
+	{ 0x1F88, 0x1F80 },
+	{ 0x1F89, 0x1F81 },
+	{ 0x1F8A, 0x1F82 },
+	{ 0x1F8B, 0x1F83 },
+	{ 0x1F8C, 0x1F84 },
+	{ 0x1F8D, 0x1F85 },
+	{ 0x1F8E, 0x1F86 },
+	{ 0x1F8F, 0x1F87 },
+	{ 0x1F98, 0x1F90 },
+	{ 0x1F99, 0x1F91 },
+	{ 0x1F9A, 0x1F92 },
+	{ 0x1F9B, 0x1F93 },
+	{ 0x1F9C, 0x1F94 },
+	{ 0x1F9D, 0x1F95 },
+	{ 0x1F9E, 0x1F96 },
+	{ 0x1F9F, 0x1F97 },
+	{ 0x1FA8, 0x1FA0 },
+	{ 0x1FA9, 0x1FA1 },
+	{ 0x1FAA, 0x1FA2 },
+	{ 0x1FAB, 0x1FA3 },
+	{ 0x1FAC, 0x1FA4 },
+	{ 0x1FAD, 0x1FA5 },
+	{ 0x1FAE, 0x1FA6 },
+	{ 0x1FAF, 0x1FA7 },
+	{ 0x1FB8, 0x1FB0 },
+	{ 0x1FB9, 0x1FB1 },
+	{ 0x1FD8, 0x1FD0 },
+	{ 0x1FD9, 0x1FD1 },
+	{ 0x1FE8, 0x1FE0 },
+	{ 0x1FE9, 0x1FE1 },
+	{ 0x24B6, 0x24D0 },
+	{ 0x24B7, 0x24D1 },
+	{ 0x24B8, 0x24D2 },
+	{ 0x24B9, 0x24D3 },
+	{ 0x24BA, 0x24D4 },
+	{ 0x24BB, 0x24D5 },
+	{ 0x24BC, 0x24D6 },
+	{ 0x24BD, 0x24D7 },
+	{ 0x24BE, 0x24D8 },
+	{ 0x24BF, 0x24D9 },
+	{ 0x24C0, 0x24DA },
+	{ 0x24C1, 0x24DB },
+	{ 0x24C2, 0x24DC },
+	{ 0x24C3, 0x24DD },
+	{ 0x24C4, 0x24DE },
+	{ 0x24C5, 0x24DF },
+	{ 0x24C6, 0x24E0 },
+	{ 0x24C7, 0x24E1 },
+	{ 0x24C8, 0x24E2 },
+	{ 0x24C9, 0x24E3 },
+	{ 0x24CA, 0x24E4 },
+	{ 0x24CB, 0x24E5 },
+	{ 0x24CC, 0x24E6 },
+	{ 0x24CD, 0x24E7 },
+	{ 0x24CE, 0x24E8 },
+	{ 0x24CF, 0x24E9 },
+	{ 0xFF21, 0xFF41 },
+	{ 0xFF22, 0xFF42 },
+	{ 0xFF23, 0xFF43 },
+	{ 0xFF24, 0xFF44 },
+	{ 0xFF25, 0xFF45 },
+	{ 0xFF26, 0xFF46 },
+	{ 0xFF27, 0xFF47 },
+	{ 0xFF28, 0xFF48 },
+	{ 0xFF29, 0xFF49 },
+	{ 0xFF2A, 0xFF4A },
+	{ 0xFF2B, 0xFF4B },
+	{ 0xFF2C, 0xFF4C },
+	{ 0xFF2D, 0xFF4D },
+	{ 0xFF2E, 0xFF4E },
+	{ 0xFF2F, 0xFF4F },
+	{ 0xFF30, 0xFF50 },
+	{ 0xFF31, 0xFF51 },
+	{ 0xFF32, 0xFF52 },
+	{ 0xFF33, 0xFF53 },
+	{ 0xFF34, 0xFF54 },
+	{ 0xFF35, 0xFF55 },
+	{ 0xFF36, 0xFF56 },
+	{ 0xFF37, 0xFF57 },
+	{ 0xFF38, 0xFF58 },
+	{ 0xFF39, 0xFF59 },
+	{ 0xFF3A, 0xFF5A },
 };
 
 static int _find_upper(int ch) {
diff --git a/core/undo_redo.cpp b/core/undo_redo.cpp
index e13164d50f..69581e4115 100644
--- a/core/undo_redo.cpp
+++ b/core/undo_redo.cpp
@@ -90,7 +90,7 @@ void UndoRedo::create_action(const String &p_name, MergeMode p_mode) {
 			actions.write[actions.size() - 1].last_tick = ticks;
 
 			merge_mode = p_mode;
-
+			merging = true;
 		} else {
 
 			Action new_action;
@@ -250,6 +250,11 @@ void UndoRedo::commit_action() {
 	if (action_level > 0)
 		return; //still nested
 
+	if (merging) {
+		version--;
+		merging = false;
+	}
+
 	commiting++;
 	redo(); // perform action
 	commiting--;
@@ -396,6 +401,7 @@ UndoRedo::UndoRedo() {
 	action_level = 0;
 	current_action = -1;
 	merge_mode = MERGE_DISABLE;
+	merging = false;
 	callback = NULL;
 	callback_ud = NULL;
 
diff --git a/core/undo_redo.h b/core/undo_redo.h
index b626149ce6..6293e77acc 100644
--- a/core/undo_redo.h
+++ b/core/undo_redo.h
@@ -80,6 +80,7 @@ private:
 	int current_action;
 	int action_level;
 	MergeMode merge_mode;
+	bool merging;
 	uint64_t version;
 
 	void _pop_history_tail();
diff --git a/core/ustring.cpp b/core/ustring.cpp
index ff8fcaaaaf..d60bd16921 100644
--- a/core/ustring.cpp
+++ b/core/ustring.cpp
@@ -3748,6 +3748,24 @@ bool String::is_valid_html_color() const {
 	return Color::html_is_valid(*this);
 }
 
+bool String::is_valid_filename() const {
+
+	String stripped = strip_edges();
+	if (*this != stripped) {
+		return false;
+	}
+
+	if (stripped == String()) {
+		return false;
+	}
+
+	if (find(":") != -1 || find("/") != -1 || find("\\") != -1 || find("?") != -1 || find("*") != -1 || find("\"") != -1 || find("|") != -1 || find("%") != -1 || find("<") != -1 || find(">") != -1) {
+		return false;
+	} else {
+		return true;
+	}
+}
+
 bool String::is_valid_ip_address() const {
 
 	if (find(":") >= 0) {
diff --git a/core/ustring.h b/core/ustring.h
index cb3d87378a..85103057df 100644
--- a/core/ustring.h
+++ b/core/ustring.h
@@ -97,6 +97,10 @@ public:
 
 	_FORCE_INLINE_ CharString() {}
 	_FORCE_INLINE_ CharString(const CharString &p_str) { _cowdata._ref(p_str._cowdata); }
+	_FORCE_INLINE_ CharString operator=(const CharString &p_str) {
+		_cowdata._ref(p_str._cowdata);
+		return *this;
+	}
 
 	bool operator<(const CharString &p_right) const;
 	CharString &operator+=(char p_char);
@@ -331,6 +335,7 @@ public:
 	bool is_valid_hex_number(bool p_with_prefix) const;
 	bool is_valid_html_color() const;
 	bool is_valid_ip_address() const;
+	bool is_valid_filename() const;
 
 	/**
 	 * The constructors must not depend on other overloads
@@ -339,6 +344,10 @@ public:
 
 	_FORCE_INLINE_ String() {}
 	_FORCE_INLINE_ String(const String &p_str) { _cowdata._ref(p_str._cowdata); }
+	String operator=(const String &p_str) {
+		_cowdata._ref(p_str._cowdata);
+		return *this;
+	}
 
 	String(const char *p_str);
 	String(const CharType *p_str, int p_clip_to_len = -1);
@@ -398,11 +407,18 @@ _FORCE_INLINE_ bool is_str_less(const L *l_ptr, const R *r_ptr) {
 //tool translate
 #ifdef TOOLS_ENABLED
 
+//gets parsed
 String TTR(const String &);
+//use for c strings
+#define TTRC(m_value) m_value
+//use to avoid parsing (for use later with C strings)
+#define TTRGET(m_value) TTR(m_value)
 
 #else
 
 #define TTR(m_val) (String())
+#define TTRCDEF(m_value) (m_value)
+#define TTRC(m_value) (m_value)
 
 #endif
 
diff --git a/core/variant_call.cpp b/core/variant_call.cpp
index 3812592639..143b07418e 100644
--- a/core/variant_call.cpp
+++ b/core/variant_call.cpp
@@ -294,6 +294,7 @@ struct _VariantCall {
 	VCALL_LOCALMEM1R(String, is_valid_hex_number);
 	VCALL_LOCALMEM0R(String, is_valid_html_color);
 	VCALL_LOCALMEM0R(String, is_valid_ip_address);
+	VCALL_LOCALMEM0R(String, is_valid_filename);
 	VCALL_LOCALMEM0R(String, to_int);
 	VCALL_LOCALMEM0R(String, to_float);
 	VCALL_LOCALMEM0R(String, hex_to_int);
@@ -341,6 +342,7 @@ struct _VariantCall {
 	VCALL_LOCALMEM1R(Vector2, project);
 	VCALL_LOCALMEM1R(Vector2, angle_to);
 	VCALL_LOCALMEM1R(Vector2, angle_to_point);
+	VCALL_LOCALMEM1R(Vector2, direction_to);
 	VCALL_LOCALMEM2R(Vector2, linear_interpolate);
 	VCALL_LOCALMEM2R(Vector2, slerp);
 	VCALL_LOCALMEM4R(Vector2, cubic_interpolate);
@@ -397,6 +399,7 @@ struct _VariantCall {
 	VCALL_LOCALMEM1R(Vector3, distance_squared_to);
 	VCALL_LOCALMEM1R(Vector3, project);
 	VCALL_LOCALMEM1R(Vector3, angle_to);
+	VCALL_LOCALMEM1R(Vector3, direction_to);
 	VCALL_LOCALMEM1R(Vector3, slide);
 	VCALL_LOCALMEM1R(Vector3, bounce);
 	VCALL_LOCALMEM1R(Vector3, reflect);
@@ -1540,6 +1543,7 @@ void register_variant_methods() {
 	ADDFUNC1R(STRING, BOOL, String, is_valid_hex_number, BOOL, "with_prefix", varray(false));
 	ADDFUNC0R(STRING, BOOL, String, is_valid_html_color, varray());
 	ADDFUNC0R(STRING, BOOL, String, is_valid_ip_address, varray());
+	ADDFUNC0R(STRING, BOOL, String, is_valid_filename, varray());
 	ADDFUNC0R(STRING, INT, String, to_int, varray());
 	ADDFUNC0R(STRING, REAL, String, to_float, varray());
 	ADDFUNC0R(STRING, INT, String, hex_to_int, varray());
@@ -1556,6 +1560,7 @@ void register_variant_methods() {
 	ADDFUNC0R(VECTOR2, REAL, Vector2, angle, varray());
 	ADDFUNC0R(VECTOR2, REAL, Vector2, length_squared, varray());
 	ADDFUNC0R(VECTOR2, BOOL, Vector2, is_normalized, varray());
+	ADDFUNC1R(VECTOR2, VECTOR2, Vector2, direction_to, VECTOR2, "b", varray());
 	ADDFUNC1R(VECTOR2, REAL, Vector2, distance_to, VECTOR2, "to", varray());
 	ADDFUNC1R(VECTOR2, REAL, Vector2, distance_squared_to, VECTOR2, "to", varray());
 	ADDFUNC1R(VECTOR2, VECTOR2, Vector2, project, VECTOR2, "b", varray());
@@ -1604,6 +1609,7 @@ void register_variant_methods() {
 	ADDFUNC2R(VECTOR3, VECTOR3, Vector3, linear_interpolate, VECTOR3, "b", REAL, "t", varray());
 	ADDFUNC2R(VECTOR3, VECTOR3, Vector3, slerp, VECTOR3, "b", REAL, "t", varray());
 	ADDFUNC4R(VECTOR3, VECTOR3, Vector3, cubic_interpolate, VECTOR3, "b", VECTOR3, "pre_a", VECTOR3, "post_b", REAL, "t", varray());
+	ADDFUNC1R(VECTOR3, VECTOR3, Vector3, direction_to, VECTOR3, "b", varray());
 	ADDFUNC1R(VECTOR3, REAL, Vector3, dot, VECTOR3, "b", varray());
 	ADDFUNC1R(VECTOR3, VECTOR3, Vector3, cross, VECTOR3, "b", varray());
 	ADDFUNC1R(VECTOR3, BASIS, Vector3, outer, VECTOR3, "b", varray());
@@ -1927,9 +1933,9 @@ void register_variant_methods() {
 	_VariantCall::add_variant_constant(Variant::TRANSFORM, "IDENTITY", identity_transform);
 	transform_x.set(-1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0);
 	_VariantCall::add_variant_constant(Variant::TRANSFORM, "FLIP_X", transform_x);
-	transform_x.set(1, 0, 0, 0, -1, 0, 0, 0, 1, 0, 0, 0);
+	transform_y.set(1, 0, 0, 0, -1, 0, 0, 0, 1, 0, 0, 0);
 	_VariantCall::add_variant_constant(Variant::TRANSFORM, "FLIP_Y", transform_y);
-	transform_x.set(1, 0, 0, 0, 1, 0, 0, 0, -1, 0, 0, 0);
+	transform_z.set(1, 0, 0, 0, 1, 0, 0, 0, -1, 0, 0, 0);
 	_VariantCall::add_variant_constant(Variant::TRANSFORM, "FLIP_Z", transform_z);
 
 	_VariantCall::add_variant_constant(Variant::PLANE, "PLANE_YZ", Plane(Vector3(1, 0, 0), 0));
diff --git a/core/vmap.h b/core/vmap.h
index f46ed70a0f..fde9723d71 100644
--- a/core/vmap.h
+++ b/core/vmap.h
@@ -65,7 +65,7 @@ private:
 		const Pair *a = _cowdata.ptr();
 		int middle = 0;
 
-#if DEBUG_ENABLED
+#ifdef DEBUG_ENABLED
 		if (low > high)
 			ERR_PRINT("low > high, this may be a bug");
 #endif
diff --git a/core/vset.h b/core/vset.h
index 678ec507ba..5f087a5a03 100644
--- a/core/vset.h
+++ b/core/vset.h
@@ -50,7 +50,7 @@ class VSet {
 		const T *a = &_data[0];
 		int middle = 0;
 
-#if DEBUG_ENABLED
+#ifdef DEBUG_ENABLED
 		if (low > high)
 			ERR_PRINT("low > high, this may be a bug");
 #endif