feat: implemented enemy wretched patrol and chase states

modules/wave_survival/player_detector.h

@@ -0,0 +1,33 @@
+#ifndef PLAYER_DETECTOR_H
+#define PLAYER_DETECTOR_H
+
+#include "player_body.h"
+#include "scene/3d/node_3d.h"
+
+class PlayerDetector : public Node3D {
+	GDCLASS(PlayerDetector, Node3D);
+	static void _bind_methods();
+	bool check() const;
+	void ready();
+	void process(double delta);
+	void set_aware_of_player(bool value);
+
+protected:
+	void _notification(int what);
+
+public:
+	bool is_aware_of_player() const;
+
+private:
+	bool aware_of_player{ false };
+	float max_distance{ 100.f };
+	float min_dot{ 0.1f };
+	double query_time{ 0.3 };
+	double query_timer{ 0.0 };
+	PhysicsDirectSpaceState3D::RayParameters ray_params{};
+
+public:
+	static String sig_awareness_changed;
+};
+
+#endif // !PLAYER_DETECTOR_H