2 files changed, 31 insertions, 10 deletions
diff --git a/scene/animation/animation_blend_space_2d.cpp b/scene/animation/animation_blend_space_2d.cpp
index 8b26044805..d744d6cc8e 100644
--- a/scene/animation/animation_blend_space_2d.cpp
+++ b/scene/animation/animation_blend_space_2d.cpp
@@ -80,18 +80,15 @@ void AnimationNodeBlendSpace2D::add_blend_point(const Ref<AnimationRootNode> &p_
 	blend_points[p_at_index].node->connect("tree_changed", this, "_tree_changed", varray(), CONNECT_REFERENCE_COUNTED);
 	blend_points_used++;
 
-	if (auto_triangles) {
-		trianges_dirty = true;
-	}
+	_queue_auto_triangles();
+
 	emit_signal("tree_changed");
 }
 
 void AnimationNodeBlendSpace2D::set_blend_point_position(int p_point, const Vector2 &p_position) {
 	ERR_FAIL_INDEX(p_point, blend_points_used);
 	blend_points[p_point].position = p_position;
-	if (auto_triangles) {
-		trianges_dirty = true;
-	}
+	_queue_auto_triangles();
 }
 void AnimationNodeBlendSpace2D::set_blend_point_node(int p_point, const Ref<AnimationRootNode> &p_node) {
 	ERR_FAIL_INDEX(p_point, blend_points_used);
@@ -309,15 +306,27 @@ Vector<int> AnimationNodeBlendSpace2D::_get_triangles() const {
 	return t;
 }
 
+void AnimationNodeBlendSpace2D::_queue_auto_triangles() {
+	if (!auto_triangles || trianges_dirty) {
+		return;
+	}
+
+	trianges_dirty = true;
+	call_deferred("_update_triangles");
+}
+
 void AnimationNodeBlendSpace2D::_update_triangles() {
 
 	if (!auto_triangles || !trianges_dirty)
 		return;
 
+	print_line("updating triangles");
 	trianges_dirty = false;
 	triangles.clear();
-	if (blend_points_used < 3)
+	if (blend_points_used < 3) {
+		emit_signal("triangles_updated");
 		return;
+	}
 
 	Vector<Vector2> points;
 	points.resize(blend_points_used);
@@ -327,9 +336,12 @@ void AnimationNodeBlendSpace2D::_update_triangles() {
 
 	Vector<Delaunay2D::Triangle> triangles = Delaunay2D::triangulate(points);
 
+	print_line("triangles generated: " + itos(triangles.size()));
+
 	for (int i = 0; i < triangles.size(); i++) {
 		add_triangle(triangles[i].points[0], triangles[i].points[1], triangles[i].points[2]);
 	}
+	emit_signal("triangles_updated");
 }
 
 Vector2 AnimationNodeBlendSpace2D::get_closest_point(const Vector2 &p_point) {
@@ -546,6 +558,10 @@ String AnimationNodeBlendSpace2D::get_caption() const {
 }
 
 void AnimationNodeBlendSpace2D::_validate_property(PropertyInfo &property) const {
+
+	if (auto_triangles && property.name == "triangles") {
+		property.usage = 0;
+	}
 	if (property.name.begins_with("blend_point_")) {
 		String left = property.name.get_slicec('/', 0);
 		int idx = left.get_slicec('_', 2).to_int();
@@ -557,10 +573,12 @@ void AnimationNodeBlendSpace2D::_validate_property(PropertyInfo &property) const
 }
 
 void AnimationNodeBlendSpace2D::set_auto_triangles(bool p_enable) {
-	auto_triangles = p_enable;
-	if (auto_triangles) {
-		trianges_dirty = true;
+	if (auto_triangles == p_enable) {
+		return;
 	}
+
+	auto_triangles = p_enable;
+	_queue_auto_triangles();
 }
 
 bool AnimationNodeBlendSpace2D::get_auto_triangles() const {
@@ -625,6 +643,7 @@ void AnimationNodeBlendSpace2D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_blend_mode"), &AnimationNodeBlendSpace2D::get_blend_mode);
 
 	ClassDB::bind_method(D_METHOD("_tree_changed"), &AnimationNodeBlendSpace2D::_tree_changed);
+	ClassDB::bind_method(D_METHOD("_update_triangles"), &AnimationNodeBlendSpace2D::_update_triangles);
 
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "auto_triangles", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "set_auto_triangles", "get_auto_triangles");
 
@@ -642,6 +661,7 @@ void AnimationNodeBlendSpace2D::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::STRING, "y_label", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "set_y_label", "get_y_label");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "blend_mode", PROPERTY_HINT_ENUM, "Interpolated,Discrete,Carry", PROPERTY_USAGE_NOEDITOR), "set_blend_mode", "get_blend_mode");
 
+	ADD_SIGNAL(MethodInfo("triangles_updated"));
 	BIND_ENUM_CONSTANT(BLEND_MODE_INTERPOLATED);
 	BIND_ENUM_CONSTANT(BLEND_MODE_DISCRETE);
 	BIND_ENUM_CONSTANT(BLEND_MODE_DISCRETE_CARRY);
diff --git a/scene/animation/animation_blend_space_2d.h b/scene/animation/animation_blend_space_2d.h
index 53885d4ad2..c21360beb9 100644
--- a/scene/animation/animation_blend_space_2d.h
+++ b/scene/animation/animation_blend_space_2d.h
@@ -82,6 +82,7 @@ protected:
 	bool trianges_dirty;
 
 	void _update_triangles();
+	void _queue_auto_triangles();
 
 	void _tree_changed();