Make NavMap objects request sync only on demand

Replaces brute-force sync check loop with a self-listing system where each object is responsible for its own sync, requesting the sync only on demand once.

modules/navigation/nav_agent.cpp

@@ -32,9 +32,6 @@
 
 #include "nav_map.h"
 
-NavAgent::NavAgent() {
-}
-
 void NavAgent::set_avoidance_enabled(bool p_enabled) {
 	avoidance_enabled = p_enabled;
 	_update_rvo_agent_properties();
@@ -87,13 +84,17 @@ void NavAgent::_update_rvo_agent_properties() {
 		}
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::set_map(NavMap *p_map) {
 	if (map == p_map) {
 		return;
 	}
 
+	cancel_sync_request();
+
 	if (map) {
 		map->remove_agent(this);
 	}
@@ -106,6 +107,8 @@ void NavAgent::set_map(NavMap *p_map) {
 		if (avoidance_enabled) {
 			map->set_agent_as_controlled(this);
 		}
+
+		request_sync();
 	}
 }
 
@@ -156,6 +159,8 @@ void NavAgent::set_neighbor_distance(real_t p_neighbor_distance) {
 		rvo_agent_2d.neighborDist_ = neighbor_distance;
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::set_max_neighbors(int p_max_neighbors) {
@@ -166,6 +171,8 @@ void NavAgent::set_max_neighbors(int p_max_neighbors) {
 		rvo_agent_2d.maxNeighbors_ = max_neighbors;
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::set_time_horizon_agents(real_t p_time_horizon) {
@@ -176,6 +183,8 @@ void NavAgent::set_time_horizon_agents(real_t p_time_horizon) {
 		rvo_agent_2d.timeHorizon_ = time_horizon_agents;
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::set_time_horizon_obstacles(real_t p_time_horizon) {
@@ -186,6 +195,8 @@ void NavAgent::set_time_horizon_obstacles(real_t p_time_horizon) {
 		rvo_agent_2d.timeHorizonObst_ = time_horizon_obstacles;
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::set_radius(real_t p_radius) {
@@ -196,6 +207,8 @@ void NavAgent::set_radius(real_t p_radius) {
 		rvo_agent_2d.radius_ = radius;
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::set_height(real_t p_height) {
@@ -206,6 +219,8 @@ void NavAgent::set_height(real_t p_height) {
 		rvo_agent_2d.height_ = height;
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::set_max_speed(real_t p_max_speed) {
@@ -218,6 +233,8 @@ void NavAgent::set_max_speed(real_t p_max_speed) {
 		}
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::set_position(const Vector3 p_position) {
@@ -231,6 +248,8 @@ void NavAgent::set_position(const Vector3 p_position) {
 		}
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::set_target_position(const Vector3 p_target_position) {
@@ -249,6 +268,8 @@ void NavAgent::set_velocity(const Vector3 p_velocity) {
 		}
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::set_velocity_forced(const Vector3 p_velocity) {
@@ -265,6 +286,8 @@ void NavAgent::set_velocity_forced(const Vector3 p_velocity) {
 		}
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::update() {
@@ -286,6 +309,8 @@ void NavAgent::set_avoidance_mask(uint32_t p_mask) {
 		rvo_agent_2d.avoidance_mask_ = avoidance_mask;
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::set_avoidance_layers(uint32_t p_layers) {
@@ -296,6 +321,8 @@ void NavAgent::set_avoidance_layers(uint32_t p_layers) {
 		rvo_agent_2d.avoidance_layers_ = avoidance_layers;
 	}
 	agent_dirty = true;
+
+	request_sync();
 }
 
 void NavAgent::set_avoidance_priority(real_t p_priority) {
@@ -308,12 +335,16 @@ void NavAgent::set_avoidance_priority(real_t p_priority) {
 		rvo_agent_2d.avoidance_priority_ = avoidance_priority;
 	}
 	agent_dirty = true;
+
+	request_sync();
+}
+
+bool NavAgent::is_dirty() const {
+	return agent_dirty;
 }
 
-bool NavAgent::check_dirty() {
-	const bool was_dirty = agent_dirty;
+void NavAgent::sync() {
 	agent_dirty = false;
-	return was_dirty;
 }
 
 const Dictionary NavAgent::get_avoidance_data() const {
@@ -372,3 +403,23 @@ void NavAgent::set_paused(bool p_paused) {
 bool NavAgent::get_paused() const {
 	return paused;
 }
+
+void NavAgent::request_sync() {
+	if (map && !sync_dirty_request_list_element.in_list()) {
+		map->add_agent_sync_dirty_request(&sync_dirty_request_list_element);
+	}
+}
+
+void NavAgent::cancel_sync_request() {
+	if (map && sync_dirty_request_list_element.in_list()) {
+		map->remove_agent_sync_dirty_request(&sync_dirty_request_list_element);
+	}
+}
+
+NavAgent::NavAgent() :
+		sync_dirty_request_list_element(this) {
+}
+
+NavAgent::~NavAgent() {
+	cancel_sync_request();
+}

modules/navigation/nav_agent.h

@@ -35,6 +35,7 @@
 
 #include "core/object/class_db.h"
 #include "core/templates/local_vector.h"
+#include "core/templates/self_list.h"
 
 #include <Agent2d.h>
 #include <Agent3d.h>
@@ -74,8 +75,11 @@ class NavAgent : public NavRid {
 	uint32_t last_map_iteration_id = 0;
 	bool paused = false;
 
+	SelfList<NavAgent> sync_dirty_request_list_element;
+
 public:
 	NavAgent();
+	~NavAgent();
 
 	void set_avoidance_enabled(bool p_enabled);
 	bool is_avoidance_enabled() { return avoidance_enabled; }
@@ -141,7 +145,10 @@ class NavAgent : public NavRid {
 	void set_paused(bool p_paused);
 	bool get_paused() const;
 
-	bool check_dirty();
+	bool is_dirty() const;
+	void sync();
+	void request_sync();
+	void cancel_sync_request();
 
 	// Updates this agent with rvo data after the rvo simulation avoidance step.
 	void update();

modules/navigation/nav_link.cpp

@@ -37,6 +37,8 @@ void NavLink::set_map(NavMap *p_map) {
 		return;
 	}
 
+	cancel_sync_request();
+
 	if (map) {
 		map->remove_link(this);
 	}
@@ -46,6 +48,7 @@ void NavLink::set_map(NavMap *p_map) {
 
 	if (map) {
 		map->add_link(this);
+		request_sync();
 	}
 }
 
@@ -57,6 +60,8 @@ void NavLink::set_enabled(bool p_enabled) {
 
 	// TODO: This should not require a full rebuild as the link has not really changed.
 	link_dirty = true;
+
+	request_sync();
 }
 
 void NavLink::set_bidirectional(bool p_bidirectional) {
@@ -65,6 +70,8 @@ void NavLink::set_bidirectional(bool p_bidirectional) {
 	}
 	bidirectional = p_bidirectional;
 	link_dirty = true;
+
+	request_sync();
 }
 
 void NavLink::set_start_position(const Vector3 p_position) {
@@ -73,6 +80,8 @@ void NavLink::set_start_position(const Vector3 p_position) {
 	}
 	start_position = p_position;
 	link_dirty = true;
+
+	request_sync();
 }
 
 void NavLink::set_end_position(const Vector3 p_position) {
@@ -81,11 +90,35 @@ void NavLink::set_end_position(const Vector3 p_position) {
 	}
 	end_position = p_position;
 	link_dirty = true;
+
+	request_sync();
 }
 
-bool NavLink::check_dirty() {
-	const bool was_dirty = link_dirty;
+bool NavLink::is_dirty() const {
+	return link_dirty;
+}
 
+void NavLink::sync() {
 	link_dirty = false;
-	return was_dirty;
+}
+
+void NavLink::request_sync() {
+	if (map && !sync_dirty_request_list_element.in_list()) {
+		map->add_link_sync_dirty_request(&sync_dirty_request_list_element);
+	}
+}
+
+void NavLink::cancel_sync_request() {
+	if (map && sync_dirty_request_list_element.in_list()) {
+		map->remove_link_sync_dirty_request(&sync_dirty_request_list_element);
+	}
+}
+
+NavLink::NavLink() :
+		sync_dirty_request_list_element(this) {
+	type = NavigationUtilities::PathSegmentType::PATH_SEGMENT_TYPE_LINK;
+}
+
+NavLink::~NavLink() {
+	cancel_sync_request();
 }

modules/navigation/nav_link.h

@@ -34,6 +34,8 @@
 #include "nav_base.h"
 #include "nav_utils.h"
 
+#include "core/templates/self_list.h"
+
 class NavLink : public NavBase {
 	NavMap *map = nullptr;
 	bool bidirectional = true;
@@ -43,10 +45,11 @@ class NavLink : public NavBase {
 
 	bool link_dirty = true;
 
+	SelfList<NavLink> sync_dirty_request_list_element;
+
 public:
-	NavLink() {
-		type = NavigationUtilities::PathSegmentType::PATH_SEGMENT_TYPE_LINK;
-	}
+	NavLink();
+	~NavLink();
 
 	void set_map(NavMap *p_map);
 	NavMap *get_map() const {
@@ -71,7 +74,11 @@ class NavLink : public NavBase {
 		return end_position;
 	}
 
-	bool check_dirty();
+	bool is_dirty() const;
+	void sync();
+	void request_sync();
+	void cancel_sync_request();
+
 };
 
 #endif // NAV_LINK_H