feat: units hold formation while patrolling

modules/wave_survival/enemies/enemy_wretched.cpp

@@ -46,6 +46,10 @@ NavigationAgent3D *WretchedState::get_nav() const {
 	return this->nav;
 }
 
+void WretchedPatrolState::set_patrol_target(Vector3 path_point) {
+	get_nav()->set_target_position(path_point + get_target()->get_unit_offset_3d());
+}
+
 void WretchedPatrolState::enter_state() {
 	this->path = get_target()->get_unit()->get_patrol_path();
 
@@ -53,13 +57,13 @@ void WretchedPatrolState::enter_state() {
 	get_target()->set_movement_speed(max_speed);
 	get_nav()->set_max_speed(max_speed);
 	Vector3 const nav_target{ this->path->get_closest_point(get_target()->get_global_position(), &this->path_point) };
-	get_nav()->set_target_position(nav_target);
+	set_patrol_target(nav_target);
 }
 
 void WretchedPatrolState::process(double delta) {
 	if (get_nav()->is_navigation_finished()) {
 		this->path_point += 1;
-		get_nav()->set_target_position(this->path->point_at(this->path_point));
+		set_patrol_target(this->path->point_at(this->path_point));
 	}
 	Vector3 const direction{ get_target()->get_global_position().direction_to(get_nav()->get_next_path_position()) };
 	get_target()->set_movement_direction(Vector2{ direction.x, direction.z }.normalized());

modules/wave_survival/enemies/enemy_wretched.h

@@ -36,6 +36,7 @@ private:
 class WretchedPatrolState : public WretchedState {
 	GDCLASS(WretchedPatrolState, WretchedState);
 	static void _bind_methods() {}
+	void set_patrol_target(Vector3 path_point);
 
 public:
 	virtual void enter_state() override;

modules/wave_survival/enemy_body.cpp

@@ -59,3 +59,15 @@ void EnemyBody::set_movement_speed(float value) {
 float EnemyBody::get_movement_speed() const {
 	return this->movement_speed;
 }
+
+void EnemyBody::set_unit_offset(Vector2 offset) {
+	this->unit_offset = offset;
+}
+
+Vector2 EnemyBody::get_unit_offset() const {
+	return this->unit_offset;
+}
+
+Vector3 EnemyBody::get_unit_offset_3d() const {
+	return { this->unit_offset.x, 0, this->unit_offset.y };
+}

modules/wave_survival/enemy_body.h

@@ -23,6 +23,9 @@ public:
 	NavigationAgent3D *get_nav() const;
 	void set_movement_speed(float value);
 	float get_movement_speed() const;
+	void set_unit_offset(Vector2 offset);
+	Vector2 get_unit_offset() const;
+	Vector3 get_unit_offset_3d() const;
 
 private:
 	float movement_speed{ 1.f };
@@ -31,6 +34,7 @@ private:
 	StateMachine *fsm{ nullptr };
 	NpcUnit *unit{ nullptr };
 	NavigationAgent3D *nav{ nullptr };
+	Vector2 unit_offset{ 0, 0 };
 };
 
 #endif // !ENEMY_BODY_H

modules/wave_survival/npc_unit.cpp

@@ -18,10 +18,13 @@ void NpcUnit::child_added(Node *node) {
 	if (EnemyBody * npc{ cast_to<EnemyBody>(node) }) {
 		this->npcs.push_back(npc);
 		npc->set_unit(this);
-		PlayerDetector *detector{ cast_to<PlayerDetector>(npc->get_node(NodePath("%PlayerDetector"))) };
+		Vector3 const offset{ npc->get_global_position() - get_global_position() };
+		npc->set_unit_offset({ offset.x, offset.z });
+		if (PlayerDetector * detector{ cast_to<PlayerDetector>(npc->get_node(NodePath("%PlayerDetector"))) }) {
 			detector->connect(PlayerDetector::sig_awareness_changed, callable_mp(this, &self_type::on_npc_awareness_changed));
 		}
 	}
+}
 
 void NpcUnit::enter_tree() {
 	this->connect("child_entered_tree", callable_mp(this, &self_type::child_added));

modules/wave_survival/npc_unit.h

@@ -1,13 +1,13 @@
 #ifndef NPC_UNIT_H
 #define NPC_UNIT_H
 
-#include "scene/main/node.h"
+#include "scene/3d/node_3d.h"
 class StateMachine;
 class EnemyBody;
 class PatrolPath;
 
-class NpcUnit : public Node {
-	GDCLASS(NpcUnit, Node);
+class NpcUnit : public Node3D {
+	GDCLASS(NpcUnit, Node3D);
 	static void _bind_methods();
 	void on_npc_awareness_changed(bool seen);
 	void child_added(Node *node);

modules/wave_survival/state_machine.cpp

@@ -56,8 +56,4 @@ void StateMachine::add_state(State *state) {
 	if (this->current_state == nullptr) {
 		this->switch_to_state(state);
 	}
-	print_line("states:");
-	for (KeyValue<StringName, State *> kv : this->states) {
-		print_line(vformat("\t\t| %s %s", kv.key, kv.value));
-	}
 }