Auto-bake edited NavigationPolygons in the Editor on a timer

Auto-bakes edited NavigationPolygons in the Editor on a timer.

doc/classes/EditorSettings.xml

@@ -429,6 +429,9 @@
 		<member name="editors/panning/warped_mouse_panning" type="bool" setter="" getter="">
 			If [code]true[/code], warps the mouse around the 2D viewport while panning in the 2D editor. This makes it possible to pan over a large area without having to exit panning and adjust the mouse cursor.
 		</member>
+		<member name="editors/polygon_editor/auto_bake_delay" type="float" setter="" getter="">
+			The delay in seconds until more complex and performance costly polygon editors commit their outlines, e.g. the 2D navigation polygon editor rebakes the navigation mesh polygons. A negative value stops the auto bake.
+		</member>
 		<member name="editors/polygon_editor/point_grab_radius" type="int" setter="" getter="">
 			The radius in which points can be selected in the [Polygon2D] and [CollisionPolygon2D] editors (in pixels). Higher values make it easier to select points quickly, but can make it more difficult to select the expected point when several points are located close to each other.
 		</member>

editor/editor_settings.cpp

@@ -756,6 +756,7 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 	// Polygon editor
 	_initial_set("editors/polygon_editor/point_grab_radius", has_touchscreen_ui ? 32 : 8);
 	_initial_set("editors/polygon_editor/show_previous_outline", true);
+	EDITOR_SETTING(Variant::FLOAT, PROPERTY_HINT_RANGE, "editors/polygon_editor/auto_bake_delay", 1.5, "-1.0,10.0,0.01");
 
 	// Animation
 	_initial_set("editors/animation/autorename_animation_tracks", true);

editor/plugins/navigation_polygon_editor_plugin.cpp

@@ -31,6 +31,7 @@
 #include "navigation_polygon_editor_plugin.h"
 
 #include "editor/editor_node.h"
+#include "editor/editor_settings.h"
 #include "editor/editor_undo_redo_manager.h"
 #include "scene/2d/navigation_region_2d.h"
 #include "scene/gui/dialogs.h"
@@ -50,6 +51,13 @@ Node2D *NavigationPolygonEditor::_get_node() const {
 
 void NavigationPolygonEditor::_set_node(Node *p_polygon) {
 	node = Object::cast_to<NavigationRegion2D>(p_polygon);
+	if (node) {
+		Ref<NavigationPolygon> navpoly = node->get_navigation_polygon();
+		if (navpoly.is_valid() && navpoly->get_outline_count() > 0 && navpoly->get_polygon_count() == 0) {
+			// We have outlines drawn / added by the user but no polygons were created for this navmesh yet so let's bake once immediately.
+			_rebake_timer_timeout();
+		}
+	}
 }
 
 int NavigationPolygonEditor::_get_polygon_count() const {
@@ -73,27 +81,43 @@ Variant NavigationPolygonEditor::_get_polygon(int p_idx) const {
 void NavigationPolygonEditor::_set_polygon(int p_idx, const Variant &p_polygon) const {
 	Ref<NavigationPolygon> navpoly = _ensure_navpoly();
 	navpoly->set_outline(p_idx, p_polygon);
+
+	if (rebake_timer && _rebake_timer_delay >= 0.0) {
+		rebake_timer->start();
+	}
 }
 
 void NavigationPolygonEditor::_action_add_polygon(const Variant &p_polygon) {
 	Ref<NavigationPolygon> navpoly = _ensure_navpoly();
 	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	undo_redo->add_do_method(navpoly.ptr(), "add_outline", p_polygon);
 	undo_redo->add_undo_method(navpoly.ptr(), "remove_outline", navpoly->get_outline_count());
+
+	if (rebake_timer && _rebake_timer_delay >= 0.0) {
+		rebake_timer->start();
+	}
 }
 
 void NavigationPolygonEditor::_action_remove_polygon(int p_idx) {
 	Ref<NavigationPolygon> navpoly = _ensure_navpoly();
 	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	undo_redo->add_do_method(navpoly.ptr(), "remove_outline", p_idx);
 	undo_redo->add_undo_method(navpoly.ptr(), "add_outline_at_index", navpoly->get_outline(p_idx), p_idx);
+
+	if (rebake_timer && _rebake_timer_delay >= 0.0) {
+		rebake_timer->start();
+	}
 }
 
 void NavigationPolygonEditor::_action_set_polygon(int p_idx, const Variant &p_previous, const Variant &p_polygon) {
 	Ref<NavigationPolygon> navpoly = _ensure_navpoly();
 	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
 	undo_redo->add_do_method(navpoly.ptr(), "set_outline", p_idx, p_polygon);
 	undo_redo->add_undo_method(navpoly.ptr(), "set_outline", p_idx, p_previous);
+
+	if (rebake_timer && _rebake_timer_delay >= 0.0) {
+		rebake_timer->start();
+	}
 }
 
 bool NavigationPolygonEditor::_has_resource() const {
@@ -136,6 +160,15 @@ NavigationPolygonEditor::NavigationPolygonEditor() {
 	bake_info = memnew(Label);
 	bake_hbox->add_child(bake_info);
 
+	rebake_timer = memnew(Timer);
+	add_child(rebake_timer);
+	rebake_timer->set_one_shot(true);
+	_rebake_timer_delay = EDITOR_GET("editors/polygon_editor/auto_bake_delay");
+	if (_rebake_timer_delay >= 0.0) {
+		rebake_timer->set_wait_time(_rebake_timer_delay);
+	}
+	rebake_timer->connect("timeout", callable_mp(this, &NavigationPolygonEditor::_rebake_timer_timeout));
+
 	err_dialog = memnew(AcceptDialog);
 	add_child(err_dialog);
 	node = nullptr;
@@ -147,15 +180,26 @@ void NavigationPolygonEditor::_notification(int p_what) {
 			button_bake->set_icon(get_theme_icon(SNAME("Bake"), SNAME("EditorIcons")));
 			button_reset->set_icon(get_theme_icon(SNAME("Reload"), SNAME("EditorIcons")));
 		} break;
+		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
+			if (rebake_timer) {
+				_rebake_timer_delay = EDITOR_GET("editors/polygon_editor/auto_bake_delay");
+				if (_rebake_timer_delay >= 0.0) {
+					rebake_timer->set_wait_time(_rebake_timer_delay);
+				}
+			}
+		} break;
 	}
 }
 
 void NavigationPolygonEditor::_bake_pressed() {
+	if (rebake_timer) {
+		rebake_timer->stop();
+	}
 	button_bake->set_pressed(false);
 
 	ERR_FAIL_NULL(node);
 	Ref<NavigationPolygon> navigation_polygon = node->get_navigation_polygon();
-	if (!navigation_polygon.is_valid()) {
+	if (navigation_polygon.is_null()) {
 		err_dialog->set_text(TTR("A NavigationPolygon resource must be set or created for this node to work."));
 		err_dialog->popup_centered();
 		return;
@@ -167,6 +211,9 @@ void NavigationPolygonEditor::_bake_pressed() {
 }
 
 void NavigationPolygonEditor::_clear_pressed() {
+	if (rebake_timer) {
+		rebake_timer->stop();
+	}
 	if (node) {
 		if (node->get_navigation_polygon().is_valid()) {
 			node->get_navigation_polygon()->clear();
@@ -193,6 +240,19 @@ void NavigationPolygonEditor::_update_polygon_editing_state() {
 	}
 }
 
+void NavigationPolygonEditor::_rebake_timer_timeout() {
+	if (!node) {
+		return;
+	}
+	Ref<NavigationPolygon> navigation_polygon = node->get_navigation_polygon();
+	if (!navigation_polygon.is_valid()) {
+		return;
+	}
+
+	node->bake_navigation_polygon(true);
+	node->queue_redraw();
+}
+
 NavigationPolygonEditorPlugin::NavigationPolygonEditorPlugin() :
 		AbstractPolygon2DEditorPlugin(memnew(NavigationPolygonEditor), "NavigationRegion2D") {
 }

editor/plugins/navigation_polygon_editor_plugin.h

@@ -56,6 +56,10 @@ class NavigationPolygonEditor : public AbstractPolygon2DEditor {
 	Button *button_reset = nullptr;
 	Label *bake_info = nullptr;
 
+	Timer *rebake_timer = nullptr;
+	float _rebake_timer_delay = 1.5;
+	void _rebake_timer_timeout();
+
 	void _bake_pressed();
 	void _clear_pressed();