3 files changed, 14 insertions, 12 deletions
diff --git a/scene/animation/tween.cpp b/scene/animation/tween.cpp
index ccc878a6ec..97229ea89b 100644
--- a/scene/animation/tween.cpp
+++ b/scene/animation/tween.cpp
@@ -152,10 +152,6 @@ bool Tween::is_running() {
 	return running;
 }
 
-void Tween::set_valid(bool p_valid) {
-	valid = p_valid;
-}
-
 bool Tween::is_valid() {
 	return valid;
 }
@@ -648,7 +644,7 @@ void Tween::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("parallel"), &Tween::parallel);
 	ClassDB::bind_method(D_METHOD("chain"), &Tween::chain);
 
-	ClassDB::bind_method(D_METHOD("interpolate_value", "initial_value", "delta_value", "elapsed_time", "duration", "trans_type", "ease_type"), &Tween::interpolate_variant);
+	ClassDB::bind_static_method("Tween", D_METHOD("interpolate_value", "initial_value", "delta_value", "elapsed_time", "duration", "trans_type", "ease_type"), &Tween::interpolate_variant);
 
 	ADD_SIGNAL(MethodInfo("step_finished", PropertyInfo(Variant::INT, "idx")));
 	ADD_SIGNAL(MethodInfo("loop_finished", PropertyInfo(Variant::INT, "loop_count")));
@@ -679,6 +675,14 @@ void Tween::_bind_methods() {
 	BIND_ENUM_CONSTANT(EASE_OUT_IN);
 }
 
+Tween::Tween() {
+	ERR_FAIL_MSG("Tween can't be created directly. Use create_tween() method.");
+}
+
+Tween::Tween(bool p_valid) {
+	valid = p_valid;
+}
+
 Ref<PropertyTweener> PropertyTweener::from(Variant p_value) {
 	initial_val = p_value;
 	do_continue = false;
diff --git a/scene/animation/tween.h b/scene/animation/tween.h
index e28a499259..5c1567d510 100644
--- a/scene/animation/tween.h
+++ b/scene/animation/tween.h
@@ -139,7 +139,6 @@ public:
 	void kill();
 
 	bool is_running();
-	void set_valid(bool p_valid);
 	bool is_valid();
 	void clear();
 
@@ -160,8 +159,8 @@ public:
 	Ref<Tween> parallel();
 	Ref<Tween> chain();
 
-	real_t run_equation(TransitionType p_trans_type, EaseType p_ease_type, real_t t, real_t b, real_t c, real_t d);
-	Variant interpolate_variant(Variant p_initial_val, Variant p_delta_val, float p_time, float p_duration, Tween::TransitionType p_trans, Tween::EaseType p_ease);
+	static real_t run_equation(TransitionType p_trans_type, EaseType p_ease_type, real_t t, real_t b, real_t c, real_t d);
+	static Variant interpolate_variant(Variant p_initial_val, Variant p_delta_val, float p_time, float p_duration, Tween::TransitionType p_trans, Tween::EaseType p_ease);
 	Variant calculate_delta_value(Variant p_intial_val, Variant p_final_val);
 
 	bool step(float p_delta);
@@ -169,7 +168,8 @@ public:
 	Node *get_bound_node() const;
 	float get_total_time() const;
 
-	Tween() {}
+	Tween();
+	Tween(bool p_valid);
 };
 
 VARIANT_ENUM_CAST(Tween::TweenPauseMode);
diff --git a/scene/main/scene_tree.cpp b/scene/main/scene_tree.cpp
index 151239c9e7..bc9e2b8a92 100644
--- a/scene/main/scene_tree.cpp
+++ b/scene/main/scene_tree.cpp
@@ -1113,9 +1113,7 @@ Ref<SceneTreeTimer> SceneTree::create_timer(double p_delay_sec, bool p_process_a
 }
 
 Ref<Tween> SceneTree::create_tween() {
-	Ref<Tween> tween;
-	tween.instantiate();
-	tween->set_valid(true);
+	Ref<Tween> tween = memnew(Tween(true));
 	tweens.push_back(tween);
 	return tween;
 }