Merge pull request #87715 from Scony/add-is-baking

Expose `is_baking` method in navigation servers and region nodes.

doc/classes/NavigationRegion2D.xml

@@ -56,6 +56,12 @@
 				Returns the [RID] of this region on the [NavigationServer2D]. Combined with [method NavigationServer2D.map_get_closest_point_owner] can be used to identify the [NavigationRegion2D] closest to a point on the merged navigation map.
 			</description>
 		</method>
+		<method name="is_baking" qualifiers="const">
+			<return type="bool" />
+			<description>
+				Returns [code]true[/code] when the [NavigationPolygon] is being baked on a background thread.
+			</description>
+		</method>
 		<method name="set_avoidance_layer_value">
 			<return type="void" />
 			<param index="0" name="layer_number" type="int" />

doc/classes/NavigationRegion3D.xml

@@ -49,6 +49,12 @@
 				Returns the [RID] of this region on the [NavigationServer3D]. Combined with [method NavigationServer3D.map_get_closest_point_owner] can be used to identify the [NavigationRegion3D] closest to a point on the merged navigation map.
 			</description>
 		</method>
+		<method name="is_baking" qualifiers="const">
+			<return type="bool" />
+			<description>
+				Returns [code]true[/code] when the [NavigationMesh] is being baked on a background thread.
+			</description>
+		</method>
 		<method name="set_navigation_layer_value">
 			<return type="void" />
 			<param index="0" name="layer_number" type="int" />

doc/classes/NavigationServer2D.xml

@@ -303,6 +303,13 @@
 				Returns all created navigation map [RID]s on the NavigationServer. This returns both 2D and 3D created navigation maps as there is technically no distinction between them.
 			</description>
 		</method>
+		<method name="is_baking_navigation_polygon" qualifiers="const">
+			<return type="bool" />
+			<param index="0" name="navigation_polygon" type="NavigationPolygon" />
+			<description>
+				Returns [code]true[/code] when the provided navigation polygon is being baked on a background thread.
+			</description>
+		</method>
 		<method name="link_create">
 			<return type="RID" />
 			<description>

doc/classes/NavigationServer3D.xml

@@ -342,6 +342,13 @@
 				Returns information about the current state of the NavigationServer. See [enum ProcessInfo] for a list of available states.
 			</description>
 		</method>
+		<method name="is_baking_navigation_mesh" qualifiers="const">
+			<return type="bool" />
+			<param index="0" name="navigation_mesh" type="NavigationMesh" />
+			<description>
+				Returns [code]true[/code] when the provided navigation mesh is being baked on a background thread.
+			</description>
+		</method>
 		<method name="link_create">
 			<return type="RID" />
 			<description>

modules/navigation/godot_navigation_server.cpp

@@ -1116,6 +1116,10 @@ void GodotNavigationServer::bake_from_source_geometry_data_async(const Ref<Navig
 #endif // _3D_DISABLED
 }
 
+bool GodotNavigationServer::is_baking_navigation_mesh(Ref<NavigationMesh> p_navigation_mesh) const {
+	return NavMeshGenerator3D::get_singleton()->is_baking(p_navigation_mesh);
+}
+
 COMMAND_1(free, RID, p_object) {
 	if (map_owner.owns(p_object)) {
 		NavMap *map = map_owner.get_or_null(p_object);

modules/navigation/godot_navigation_server.h

@@ -258,6 +258,7 @@ public:
 	virtual void parse_source_geometry_data(const Ref<NavigationMesh> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData3D> &p_source_geometry_data, Node *p_root_node, const Callable &p_callback = Callable()) override;
 	virtual void bake_from_source_geometry_data(const Ref<NavigationMesh> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData3D> &p_source_geometry_data, const Callable &p_callback = Callable()) override;
 	virtual void bake_from_source_geometry_data_async(const Ref<NavigationMesh> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData3D> &p_source_geometry_data, const Callable &p_callback = Callable()) override;
+	virtual bool is_baking_navigation_mesh(Ref<NavigationMesh> p_navigation_mesh) const override;
 
 	COMMAND_1(free, RID, p_object);
 

modules/navigation/godot_navigation_server_2d.cpp

@@ -221,6 +221,10 @@ void GodotNavigationServer2D::bake_from_source_geometry_data_async(const Ref<Nav
 #endif // CLIPPER2_ENABLED
 }
 
+bool GodotNavigationServer2D::is_baking_navigation_polygon(Ref<NavigationPolygon> p_navigation_polygon) const {
+	return NavMeshGenerator2D::get_singleton()->is_baking(p_navigation_polygon);
+}
+
 GodotNavigationServer2D::GodotNavigationServer2D() {}
 
 GodotNavigationServer2D::~GodotNavigationServer2D() {}

modules/navigation/godot_navigation_server_2d.h

@@ -250,6 +250,7 @@ public:
 	virtual void parse_source_geometry_data(const Ref<NavigationPolygon> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData2D> &p_source_geometry_data, Node *p_root_node, const Callable &p_callback = Callable()) override;
 	virtual void bake_from_source_geometry_data(const Ref<NavigationPolygon> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData2D> &p_source_geometry_data, const Callable &p_callback = Callable()) override;
 	virtual void bake_from_source_geometry_data_async(const Ref<NavigationPolygon> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData2D> &p_source_geometry_data, const Callable &p_callback = Callable()) override;
+	virtual bool is_baking_navigation_polygon(Ref<NavigationPolygon> p_navigation_polygon) const override;
 };
 
 #endif // GODOT_NAVIGATION_SERVER_2D_H

modules/navigation/nav_mesh_generator_2d.cpp

@@ -157,11 +157,10 @@ void NavMeshGenerator2D::bake_from_source_geometry_data(Ref<NavigationPolygon> p
 		return;
 	}
 
-	baking_navmesh_mutex.lock();
-	if (baking_navmeshes.has(p_navigation_mesh)) {
-		baking_navmesh_mutex.unlock();
+	if (is_baking(p_navigation_mesh)) {
 		ERR_FAIL_MSG("NavigationPolygon is already baking. Wait for current bake to finish.");
 	}
+	baking_navmesh_mutex.lock();
 	baking_navmeshes.insert(p_navigation_mesh);
 	baking_navmesh_mutex.unlock();
 
@@ -193,11 +192,10 @@ void NavMeshGenerator2D::bake_from_source_geometry_data_async(Ref<NavigationPoly
 		return;
 	}
 
-	baking_navmesh_mutex.lock();
-	if (baking_navmeshes.has(p_navigation_mesh)) {
-		baking_navmesh_mutex.unlock();
+	if (is_baking(p_navigation_mesh)) {
 		ERR_FAIL_MSG("NavigationPolygon is already baking. Wait for current bake to finish.");
 	}
+	baking_navmesh_mutex.lock();
 	baking_navmeshes.insert(p_navigation_mesh);
 	baking_navmesh_mutex.unlock();
 
@@ -212,6 +210,13 @@ void NavMeshGenerator2D::bake_from_source_geometry_data_async(Ref<NavigationPoly
 	generator_task_mutex.unlock();
 }
 
+bool NavMeshGenerator2D::is_baking(Ref<NavigationPolygon> p_navigation_polygon) {
+	baking_navmesh_mutex.lock();
+	bool baking = baking_navmeshes.has(p_navigation_polygon);
+	baking_navmesh_mutex.unlock();
+	return baking;
+}
+
 void NavMeshGenerator2D::generator_thread_bake(void *p_arg) {
 	NavMeshGeneratorTask2D *generator_task = static_cast<NavMeshGeneratorTask2D *>(p_arg);
 

modules/navigation/nav_mesh_generator_2d.h

@@ -92,6 +92,7 @@ public:
 	static void parse_source_geometry_data(Ref<NavigationPolygon> p_navigation_mesh, Ref<NavigationMeshSourceGeometryData2D> p_source_geometry_data, Node *p_root_node, const Callable &p_callback = Callable());
 	static void bake_from_source_geometry_data(Ref<NavigationPolygon> p_navigation_mesh, Ref<NavigationMeshSourceGeometryData2D> p_source_geometry_data, const Callable &p_callback = Callable());
 	static void bake_from_source_geometry_data_async(Ref<NavigationPolygon> p_navigation_mesh, Ref<NavigationMeshSourceGeometryData2D> p_source_geometry_data, const Callable &p_callback = Callable());
+	static bool is_baking(Ref<NavigationPolygon> p_navigation_polygon);
 
 	NavMeshGenerator2D();
 	~NavMeshGenerator2D();

modules/navigation/nav_mesh_generator_3d.cpp

@@ -172,11 +172,10 @@ void NavMeshGenerator3D::bake_from_source_geometry_data(Ref<NavigationMesh> p_na
 		return;
 	}
 
-	baking_navmesh_mutex.lock();
-	if (baking_navmeshes.has(p_navigation_mesh)) {
-		baking_navmesh_mutex.unlock();
+	if (is_baking(p_navigation_mesh)) {
 		ERR_FAIL_MSG("NavigationMesh is already baking. Wait for current bake to finish.");
 	}
+	baking_navmesh_mutex.lock();
 	baking_navmeshes.insert(p_navigation_mesh);
 	baking_navmesh_mutex.unlock();
 
@@ -208,12 +207,11 @@ void NavMeshGenerator3D::bake_from_source_geometry_data_async(Ref<NavigationMesh
 		return;
 	}
 
-	baking_navmesh_mutex.lock();
-	if (baking_navmeshes.has(p_navigation_mesh)) {
-		baking_navmesh_mutex.unlock();
+	if (is_baking(p_navigation_mesh)) {
 		ERR_FAIL_MSG("NavigationMesh is already baking. Wait for current bake to finish.");
 		return;
 	}
+	baking_navmesh_mutex.lock();
 	baking_navmeshes.insert(p_navigation_mesh);
 	baking_navmesh_mutex.unlock();
 
@@ -228,6 +226,13 @@ void NavMeshGenerator3D::bake_from_source_geometry_data_async(Ref<NavigationMesh
 	generator_task_mutex.unlock();
 }
 
+bool NavMeshGenerator3D::is_baking(Ref<NavigationMesh> p_navigation_mesh) {
+	baking_navmesh_mutex.lock();
+	bool baking = baking_navmeshes.has(p_navigation_mesh);
+	baking_navmesh_mutex.unlock();
+	return baking;
+}
+
 void NavMeshGenerator3D::generator_thread_bake(void *p_arg) {
 	NavMeshGeneratorTask3D *generator_task = static_cast<NavMeshGeneratorTask3D *>(p_arg);
 

modules/navigation/nav_mesh_generator_3d.h

@@ -99,6 +99,7 @@ public:
 	static void parse_source_geometry_data(Ref<NavigationMesh> p_navigation_mesh, Ref<NavigationMeshSourceGeometryData3D> p_source_geometry_data, Node *p_root_node, const Callable &p_callback = Callable());
 	static void bake_from_source_geometry_data(Ref<NavigationMesh> p_navigation_mesh, Ref<NavigationMeshSourceGeometryData3D> p_source_geometry_data, const Callable &p_callback = Callable());
 	static void bake_from_source_geometry_data_async(Ref<NavigationMesh> p_navigation_mesh, Ref<NavigationMeshSourceGeometryData3D> p_source_geometry_data, const Callable &p_callback = Callable());
+	static bool is_baking(Ref<NavigationMesh> p_navigation_mesh);
 
 	NavMeshGenerator3D();
 	~NavMeshGenerator3D();

scene/2d/navigation_region_2d.cpp

@@ -253,6 +253,10 @@ void NavigationRegion2D::_bake_finished(Ref<NavigationPolygon> p_navigation_poly
 	emit_signal(SNAME("bake_finished"));
 }
 
+bool NavigationRegion2D::is_baking() const {
+	return NavigationServer2D::get_singleton()->is_baking_navigation_polygon(navigation_polygon);
+}
+
 void NavigationRegion2D::_navigation_polygon_changed() {
 	if (is_inside_tree() && (Engine::get_singleton()->is_editor_hint() || get_tree()->is_debugging_navigation_hint())) {
 		queue_redraw();
@@ -320,6 +324,7 @@ void NavigationRegion2D::_bind_methods() {
 	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("is_baking"), &NavigationRegion2D::is_baking);
 
 	ClassDB::bind_method(D_METHOD("_navigation_polygon_changed"), &NavigationRegion2D::_navigation_polygon_changed);
 

scene/2d/navigation_region_2d.h

@@ -117,6 +117,7 @@ public:
 
 	void bake_navigation_polygon(bool p_on_thread);
 	void _bake_finished(Ref<NavigationPolygon> p_navigation_polygon);
+	bool is_baking() const;
 
 	NavigationRegion2D();
 	~NavigationRegion2D();

scene/3d/navigation_region_3d.cpp

@@ -266,6 +266,10 @@ void NavigationRegion3D::_bake_finished(Ref<NavigationMesh> p_navigation_mesh) {
 	emit_signal(SNAME("bake_finished"));
 }
 
+bool NavigationRegion3D::is_baking() const {
+	return NavigationServer3D::get_singleton()->is_baking_navigation_mesh(navigation_mesh);
+}
+
 PackedStringArray NavigationRegion3D::get_configuration_warnings() const {
 	PackedStringArray warnings = Node::get_configuration_warnings();
 
@@ -308,6 +312,7 @@ void NavigationRegion3D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_travel_cost"), &NavigationRegion3D::get_travel_cost);
 
 	ClassDB::bind_method(D_METHOD("bake_navigation_mesh", "on_thread"), &NavigationRegion3D::bake_navigation_mesh, DEFVAL(true));
+	ClassDB::bind_method(D_METHOD("is_baking"), &NavigationRegion3D::is_baking);
 
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "navigation_mesh", PROPERTY_HINT_RESOURCE_TYPE, "NavigationMesh"), "set_navigation_mesh", "get_navigation_mesh");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "enabled"), "set_enabled", "is_enabled");

scene/3d/navigation_region_3d.h

@@ -105,6 +105,7 @@ public:
 	/// sets the new navigation mesh and emits a signal
 	void bake_navigation_mesh(bool p_on_thread);
 	void _bake_finished(Ref<NavigationMesh> p_navigation_mesh);
+	bool is_baking() const;
 
 	PackedStringArray get_configuration_warnings() const override;
 

servers/navigation_server_2d.cpp

@@ -162,6 +162,7 @@ void NavigationServer2D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("parse_source_geometry_data", "navigation_polygon", "source_geometry_data", "root_node", "callback"), &NavigationServer2D::parse_source_geometry_data, DEFVAL(Callable()));
 	ClassDB::bind_method(D_METHOD("bake_from_source_geometry_data", "navigation_polygon", "source_geometry_data", "callback"), &NavigationServer2D::bake_from_source_geometry_data, DEFVAL(Callable()));
 	ClassDB::bind_method(D_METHOD("bake_from_source_geometry_data_async", "navigation_polygon", "source_geometry_data", "callback"), &NavigationServer2D::bake_from_source_geometry_data_async, DEFVAL(Callable()));
+	ClassDB::bind_method(D_METHOD("is_baking_navigation_polygon", "navigation_polygon"), &NavigationServer2D::is_baking_navigation_polygon);
 
 	ClassDB::bind_method(D_METHOD("free_rid", "rid"), &NavigationServer2D::free);
 

servers/navigation_server_2d.h

@@ -303,6 +303,7 @@ public:
 	virtual void parse_source_geometry_data(const Ref<NavigationPolygon> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData2D> &p_source_geometry_data, Node *p_root_node, const Callable &p_callback = Callable()) = 0;
 	virtual void bake_from_source_geometry_data(const Ref<NavigationPolygon> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData2D> &p_source_geometry_data, const Callable &p_callback = Callable()) = 0;
 	virtual void bake_from_source_geometry_data_async(const Ref<NavigationPolygon> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData2D> &p_source_geometry_data, const Callable &p_callback = Callable()) = 0;
+	virtual bool is_baking_navigation_polygon(Ref<NavigationPolygon> p_navigation_polygon) const = 0;
 
 	NavigationServer2D();
 	~NavigationServer2D() override;

servers/navigation_server_2d_dummy.h

@@ -167,6 +167,7 @@ public:
 	void parse_source_geometry_data(const Ref<NavigationPolygon> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData2D> &p_source_geometry_data, Node *p_root_node, const Callable &p_callback = Callable()) override {}
 	void bake_from_source_geometry_data(const Ref<NavigationPolygon> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData2D> &p_source_geometry_data, const Callable &p_callback = Callable()) override {}
 	void bake_from_source_geometry_data_async(const Ref<NavigationPolygon> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData2D> &p_source_geometry_data, const Callable &p_callback = Callable()) override {}
+	bool is_baking_navigation_polygon(Ref<NavigationPolygon> p_navigation_polygon) const override { return false; }
 
 	void set_debug_enabled(bool p_enabled) {}
 	bool get_debug_enabled() const { return false; }

servers/navigation_server_3d.cpp

@@ -179,6 +179,7 @@ void NavigationServer3D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("parse_source_geometry_data", "navigation_mesh", "source_geometry_data", "root_node", "callback"), &NavigationServer3D::parse_source_geometry_data, DEFVAL(Callable()));
 	ClassDB::bind_method(D_METHOD("bake_from_source_geometry_data", "navigation_mesh", "source_geometry_data", "callback"), &NavigationServer3D::bake_from_source_geometry_data, DEFVAL(Callable()));
 	ClassDB::bind_method(D_METHOD("bake_from_source_geometry_data_async", "navigation_mesh", "source_geometry_data", "callback"), &NavigationServer3D::bake_from_source_geometry_data_async, DEFVAL(Callable()));
+	ClassDB::bind_method(D_METHOD("is_baking_navigation_mesh", "navigation_mesh"), &NavigationServer3D::is_baking_navigation_mesh);
 
 	ClassDB::bind_method(D_METHOD("free_rid", "rid"), &NavigationServer3D::free);
 

servers/navigation_server_3d.h

@@ -343,6 +343,7 @@ public:
 	virtual void parse_source_geometry_data(const Ref<NavigationMesh> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData3D> &p_source_geometry_data, Node *p_root_node, const Callable &p_callback = Callable()) = 0;
 	virtual void bake_from_source_geometry_data(const Ref<NavigationMesh> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData3D> &p_source_geometry_data, const Callable &p_callback = Callable()) = 0;
 	virtual void bake_from_source_geometry_data_async(const Ref<NavigationMesh> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData3D> &p_source_geometry_data, const Callable &p_callback = Callable()) = 0;
+	virtual bool is_baking_navigation_mesh(Ref<NavigationMesh> p_navigation_mesh) const = 0;
 
 	NavigationServer3D();
 	~NavigationServer3D() override;

servers/navigation_server_3d_dummy.h

@@ -170,6 +170,8 @@ public:
 	void parse_source_geometry_data(const Ref<NavigationMesh> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData3D> &p_source_geometry_data, Node *p_root_node, const Callable &p_callback = Callable()) override {}
 	void bake_from_source_geometry_data(const Ref<NavigationMesh> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData3D> &p_source_geometry_data, const Callable &p_callback = Callable()) override {}
 	void bake_from_source_geometry_data_async(const Ref<NavigationMesh> &p_navigation_mesh, const Ref<NavigationMeshSourceGeometryData3D> &p_source_geometry_data, const Callable &p_callback = Callable()) override {}
+	bool is_baking_navigation_mesh(Ref<NavigationMesh> p_navigation_mesh) const override { return false; }
+
 	void free(RID p_object) override {}
 	void set_active(bool p_active) override {}
 	void process(real_t delta_time) override {}

tests/scene/test_navigation_region_3d.h

@@ -31,8 +31,10 @@
 #ifndef TEST_NAVIGATION_REGION_3D_H
 #define TEST_NAVIGATION_REGION_3D_H
 
+#include "scene/3d/mesh_instance_3d.h"
 #include "scene/3d/navigation_region_3d.h"
 #include "scene/main/window.h"
+#include "scene/resources/primitive_meshes.h"
 
 #include "tests/test_macros.h"
 
@@ -44,6 +46,44 @@ TEST_SUITE("[Navigation]") {
 		CHECK(region_node->get_region_rid().is_valid());
 		memdelete(region_node);
 	}
+
+	TEST_CASE("[SceneTree][NavigationRegion3D] Region should bake successfully from valid geometry") {
+		Node3D *node_3d = memnew(Node3D);
+		SceneTree::get_singleton()->get_root()->add_child(node_3d);
+		Ref<NavigationMesh> navigation_mesh = memnew(NavigationMesh);
+		NavigationRegion3D *navigation_region = memnew(NavigationRegion3D);
+		navigation_region->set_navigation_mesh(navigation_mesh);
+		node_3d->add_child(navigation_region);
+		Ref<PlaneMesh> plane_mesh = memnew(PlaneMesh);
+		plane_mesh->set_size(Size2(10.0, 10.0));
+		MeshInstance3D *mesh_instance = memnew(MeshInstance3D);
+		mesh_instance->set_mesh(plane_mesh);
+		navigation_region->add_child(mesh_instance);
+
+		CHECK_FALSE(navigation_region->is_baking());
+		CHECK_EQ(navigation_mesh->get_polygon_count(), 0);
+		CHECK_EQ(navigation_mesh->get_vertices().size(), 0);
+
+		SUBCASE("Synchronous bake should have immediate effects") {
+			navigation_region->bake_navigation_mesh(false);
+			CHECK_FALSE(navigation_region->is_baking());
+			CHECK_NE(navigation_mesh->get_polygon_count(), 0);
+			CHECK_NE(navigation_mesh->get_vertices().size(), 0);
+		}
+
+		// Race condition is present in the below subcase, but baking should take many
+		// orders of magnitude longer than basic checks on the main thread, so it's fine.
+		SUBCASE("Asynchronous bake should not be immediate") {
+			navigation_region->bake_navigation_mesh(true);
+			CHECK(navigation_region->is_baking());
+			CHECK_EQ(navigation_mesh->get_polygon_count(), 0);
+			CHECK_EQ(navigation_mesh->get_vertices().size(), 0);
+		}
+
+		memdelete(mesh_instance);
+		memdelete(navigation_region);
+		memdelete(node_3d);
+	}
 }
 
 } //namespace TestNavigationRegion3D

tests/servers/test_navigation_server_3d.h

@@ -720,6 +720,24 @@ TEST_SUITE("[Navigation]") {
 		navigation_server->free(map);
 		navigation_server->process(0.0); // Give server some cycles to commit.
 	}
+
+	TEST_CASE("[NavigationServer3D] Server should be able to bake asynchronously") {
+		NavigationServer3D *navigation_server = NavigationServer3D::get_singleton();
+		Ref<NavigationMesh> navigation_mesh = memnew(NavigationMesh);
+		Ref<NavigationMeshSourceGeometryData3D> source_geometry = memnew(NavigationMeshSourceGeometryData3D);
+
+		Array arr;
+		arr.resize(RS::ARRAY_MAX);
+		BoxMesh::create_mesh_array(arr, Vector3(10.0, 0.001, 10.0));
+		source_geometry->add_mesh_array(arr, Transform3D());
+
+		// Race condition is present below, but baking should take many orders of magnitude
+		// longer than basic checks on the main thread, so it's fine.
+		navigation_server->bake_from_source_geometry_data_async(navigation_mesh, source_geometry, Callable());
+		CHECK(navigation_server->is_baking_navigation_mesh(navigation_mesh));
+		CHECK_EQ(navigation_mesh->get_polygon_count(), 0);
+		CHECK_EQ(navigation_mesh->get_vertices().size(), 0);
+	}
 }
 } //namespace TestNavigationServer3D