Add 2D navigation mesh baking

Adds 2D navigation mesh baking.

1 files changed, 31 insertions, 4 deletions

diff --git a/scene/2d/navigation_region_2d.cpp b/scene/2d/navigation_region_2d.cpp
index 670a2c641c..706b26bd05 100644
--- a/scene/2d/navigation_region_2d.cpp
+++ b/scene/2d/navigation_region_2d.cpp
@@ -179,10 +179,6 @@ void NavigationRegion2D::_notification(int p_what) {
 }
 
 void NavigationRegion2D::set_navigation_polygon(const Ref<NavigationPolygon> &p_navigation_polygon) {
-	if (p_navigation_polygon == navigation_polygon) {
-		return;
-	}
-
 	if (navigation_polygon.is_valid()) {
 		navigation_polygon->disconnect_changed(callable_mp(this, &NavigationRegion2D::_navigation_polygon_changed));
 	}
@@ -226,6 +222,32 @@ RID NavigationRegion2D::get_navigation_map() const {
 	return RID();
 }
 
+void NavigationRegion2D::bake_navigation_polygon(bool p_on_thread) {
+	ERR_FAIL_COND_MSG(!Thread::is_main_thread(), "The SceneTree can only be parsed on the main thread. Call this function from the main thread or use call_deferred().");
+	ERR_FAIL_COND_MSG(!navigation_polygon.is_valid(), "Baking the navigation polygon requires a valid `NavigationPolygon` resource.");
+
+	Ref<NavigationMeshSourceGeometryData2D> source_geometry_data;
+	source_geometry_data.instantiate();
+
+	NavigationServer2D::get_singleton()->parse_source_geometry_data(navigation_polygon, source_geometry_data, this);
+
+	if (p_on_thread) {
+		NavigationServer2D::get_singleton()->bake_from_source_geometry_data_async(navigation_polygon, source_geometry_data, callable_mp(this, &NavigationRegion2D::_bake_finished).bind(navigation_polygon));
+	} else {
+		NavigationServer2D::get_singleton()->bake_from_source_geometry_data(navigation_polygon, source_geometry_data, callable_mp(this, &NavigationRegion2D::_bake_finished).bind(navigation_polygon));
+	}
+}
+
+void NavigationRegion2D::_bake_finished(Ref<NavigationPolygon> p_navigation_polygon) {
+	if (!Thread::is_main_thread()) {
+		call_deferred(SNAME("_bake_finished"), p_navigation_polygon);
+		return;
+	}
+
+	set_navigation_polygon(p_navigation_polygon);
+	emit_signal(SNAME("bake_finished"));
+}
+
 void NavigationRegion2D::_navigation_polygon_changed() {
 	if (is_inside_tree() && (Engine::get_singleton()->is_editor_hint() || get_tree()->is_debugging_navigation_hint())) {
 		queue_redraw();
@@ -290,6 +312,8 @@ void NavigationRegion2D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_travel_cost", "travel_cost"), &NavigationRegion2D::set_travel_cost);
 	ClassDB::bind_method(D_METHOD("get_travel_cost"), &NavigationRegion2D::get_travel_cost);
 
+	ClassDB::bind_method(D_METHOD("bake_navigation_polygon", "on_thread"), &NavigationRegion2D::bake_navigation_polygon, DEFVAL(true));
+
 	ClassDB::bind_method(D_METHOD("_navigation_polygon_changed"), &NavigationRegion2D::_navigation_polygon_changed);
 
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "navigation_polygon", PROPERTY_HINT_RESOURCE_TYPE, "NavigationPolygon"), "set_navigation_polygon", "get_navigation_polygon");
@@ -300,6 +324,9 @@ void NavigationRegion2D::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "travel_cost"), "set_travel_cost", "get_travel_cost");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "constrain_avoidance"), "set_constrain_avoidance", "get_constrain_avoidance");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "avoidance_layers", PROPERTY_HINT_LAYERS_AVOIDANCE), "set_avoidance_layers", "get_avoidance_layers");
+
+	ADD_SIGNAL(MethodInfo("navigation_polygon_changed"));
+	ADD_SIGNAL(MethodInfo("bake_finished"));
 }
 
 #ifndef DISABLE_DEPRECATED