Enemy Navigation Movement

Scenes/Actors/ActorEnemyTest.tscn

@@ -1,10 +1,13 @@
-[gd_scene load_steps=32 format=3 uid="uid://bqjcwxene73l2"]
+[gd_scene load_steps=36 format=3 uid="uid://bqjcwxene73l2"]
 
 [ext_resource type="Script" path="res://Scripts/Components/Actors/Actor.cs" id="1_k5cyk"]
 [ext_resource type="Texture2D" uid="uid://hukxr2e63gky" path="res://Sprites/Actors/Robot3.png" id="2_wt8wl"]
-[ext_resource type="Script" path="res://Scripts/Components/Actors/ActorFreeMovement.cs" id="3_4dv5b"]
+[ext_resource type="Script" path="res://Scripts/Components/Actors/EnemyPossessionMovement.cs" id="3_a5upk"]
 [ext_resource type="Script" path="res://Scripts/Components/Actors/KeyboardInputProvider.cs" id="4_8bcq6"]
 [ext_resource type="Script" path="res://Scripts/Components/Actors/AnimationHandler.cs" id="5_c7ovk"]
+[ext_resource type="Script" path="res://Scripts/Components/Actors/ActorAi.cs" id="6_jlcsg"]
+[ext_resource type="Script" path="res://Scripts/Components/Actors/EnemyNavigationMovement.cs" id="7_fvl12"]
+[ext_resource type="Script" path="res://Scripts/Components/ProximityPlayerDetection.cs" id="8_62r5q"]
 
 [sub_resource type="AtlasTexture" id="AtlasTexture_spe0p"]
 atlas = ExtResource("2_wt8wl")
@@ -220,6 +223,9 @@ animations = [{
 [sub_resource type="CircleShape2D" id="CircleShape2D_2b36v"]
 radius = 5.0
 
+[sub_resource type="CircleShape2D" id="CircleShape2D_sthwe"]
+radius = 85.0529
+
 [node name="ActorEnemyTest" type="CharacterBody2D"]
 collision_layer = 16
 collision_mask = 115
@@ -232,7 +238,7 @@ sprite_frames = SubResource("SpriteFrames_ix17a")
 animation = &"walk_down"
 
 [node name="MovementProvider" type="Node2D" parent="."]
-script = ExtResource("3_4dv5b")
+script = ExtResource("3_a5upk")
 
 [node name="InputProvider" type="Node2D" parent="MovementProvider"]
 script = ExtResource("4_8bcq6")
@@ -243,3 +249,33 @@ shape = SubResource("CircleShape2D_2b36v")
 [node name="AnimationHandler" type="Node2D" parent="." node_paths=PackedStringArray("_animatedSprite")]
 script = ExtResource("5_c7ovk")
 _animatedSprite = NodePath("../AnimatedSprite2D")
+
+[node name="ActorAi" type="Node2D" parent="."]
+script = ExtResource("6_jlcsg")
+Ai = 0
+
+[node name="NavigationMovementProvider" type="Node2D" parent="." node_paths=PackedStringArray("_playerDetection")]
+script = ExtResource("7_fvl12")
+_navigationEnabled = true
+_playerDetection = NodePath("../PlayerDetection")
+
+[node name="PlayerDetection" type="Area2D" parent="."]
+visible = false
+collision_layer = 16
+collision_mask = 2
+script = ExtResource("8_62r5q")
+
+[node name="PlayerDetectionArea" type="CollisionShape2D" parent="PlayerDetection"]
+shape = SubResource("CircleShape2D_sthwe")
+
+[node name="NavigationAgent2D" type="NavigationAgent2D" parent="."]
+target_desired_distance = 64.0
+path_max_distance = 800.0
+path_postprocessing = 1
+avoidance_enabled = true
+debug_enabled = true
+debug_path_custom_color = Color(1, 0, 0, 1)
+
+[connection signal="area_entered" from="PlayerDetection" to="PlayerDetection" method="_on_area_entered"]
+[connection signal="area_exited" from="PlayerDetection" to="PlayerDetection" method="_on_area_exited"]
+[connection signal="velocity_computed" from="NavigationAgent2D" to="NavigationMovementProvider" method="_on_navigation_agent_2d_velocity_computed"]

Scripts/Components/Actors/ActorAi.cs

@@ -0,0 +1,12 @@
+using Godot;
+
+public partial class ActorAi : Node2D 
+{
+
+    public EnemyState State { get; set; } = EnemyState.Idle;
+
+    [Export] // Temp until the special actor tha sets it
+    public AiState Ai { get; set; } = AiState.Disabled;
+
+
+}

Scripts/Components/Actors/EnemyNavigationMovement.cs

@@ -0,0 +1,157 @@
+using Godot;
+using Cirno.Scripts;
+using Cirno.Scripts.Components;
+using System.Collections.Generic;
+using System.Linq;
+using Cirno.Scripts.Components.Actors;
+
+public partial class EnemyNavigationMovement : MovementHandler 
+{
+    public override Vector2 FacingDirection
+    {
+        get => _parent.FacingDirection;
+        set => _parent.FacingDirection = value;
+    }
+
+    public override Vector2 MovementDirection
+    {
+        get => _parent.MovementDirection;
+        set => _parent.MovementDirection = value;
+    }
+
+    [Export]
+    private bool _navigationEnabled = false;
+
+    [Export] public float AlarmReactRange = 200f;
+
+    [Export] public float PlayerDisengageRange = 500f;
+
+    public bool NavigationEnabled
+	{
+		get => _actorAi is not null && _actorAi.Ai is AiState.Enabled && _navigationEnabled && _navigationAgent != null;
+		set => _navigationEnabled = value;
+	}
+
+    [Export]
+	private PlayerDetection _playerDetection;
+
+    private ActorAi _actorAi;
+    private NavigationAgent2D _navigationAgent;
+    private AlarmManager _alarmManager;
+
+    private Vector2? _lastPlayerPosition = null;
+
+    private bool IsPlayerInRange => _playerDetection is { IsPlayerInRange: true };
+
+    private bool IsPlayerInSight => _playerDetection is not null && _playerDetection.IsPlayerInSight(_parent.CollisionMask);
+
+    public override void Init(Actor parent) 
+    {
+        base.Init(parent);
+       
+        MovementDirection = Vector2.Zero;
+        FacingDirection = Vector2.Down;
+
+         _actorAi = parent.GetNode<ActorAi>("ActorAi");
+         _navigationAgent = GetNodeOrNull<NavigationAgent2D>("NavigationAgent2D");
+         _alarmManager = this.GetAlarmManager();
+
+        if (_alarmManager != null)
+		{
+			_alarmManager.AlarmEnabled += AlarmManagerOnAlarmEnabled;
+		}
+
+    }
+
+    private void AlarmManagerOnAlarmEnabled(Vector2 location)
+	{
+		if (NavigationEnabled && location.DistanceTo(this.GlobalPosition) <= AlarmReactRange)
+		{
+			GD.Print($"Enemy {Name} alerted");
+			_actorAi.State = EnemyState.Alert;
+			_lastPlayerPosition = location;
+		}
+	}
+
+    public override void Move(double delta)
+    {
+        if (_actorAi.Ai is not AiState.Enabled) 
+            return;
+
+
+        switch (_actorAi.State) 
+        {
+            case EnemyState.Idle:
+                if (_playerDetection != null && _playerDetection.IsPlayerInSight(_parent.CollisionMask))
+				{
+					_actorAi.State = EnemyState.Alert;
+				}
+            break;
+            case EnemyState.Alert:
+
+				// Update last known player position if it's in range
+				if (IsPlayerInRange)
+				{
+					_lastPlayerPosition = _playerDetection.CachedPlayer.GlobalPosition;
+				}
+				
+				if (NavigationEnabled)
+				{
+					if (_lastPlayerPosition.HasValue)
+					{
+						_navigationAgent.SetTargetPosition(_lastPlayerPosition.Value);
+					}
+					
+					var currentAgentPosition = GlobalPosition;
+			
+					var nextPathPosition = _navigationAgent.GetNextPathPosition();
+				
+					var newVelocity = currentAgentPosition.DirectionTo(nextPathPosition) * _parent.MovementSpeed;
+				
+				
+					// Navigation is over, can do other things like shooting
+					if (_navigationAgent.IsNavigationFinished())
+					{
+						// Shoot player
+						if (IsPlayerInSight)
+						{
+							//Shoot();
+						}
+					
+						// TODO: If player totally left the max range it should stop shooting and go back to idle
+					
+						return;
+					}
+				
+					if (_navigationAgent.AvoidanceEnabled)
+					{
+						_navigationAgent.SetVelocity(newVelocity);
+			
+					}
+					else
+					{
+						_on_navigation_agent_2d_velocity_computed(newVelocity);
+					}
+
+					_parent.MoveAndSlide();
+				}
+				else
+				{
+					if (IsPlayerInSight)
+					{
+						//Shoot();
+					}
+				}
+				
+				break;
+        }
+        
+    }
+
+    public void _on_navigation_agent_2d_velocity_computed(Vector2 safeVelocity)
+	{
+		_parent.Velocity = safeVelocity; 
+		
+	}
+
+}

Scripts/Components/Actors/EnemyPossessionMovement.cs

@@ -0,0 +1,23 @@
+using Godot;
+
+public partial class EnemyPossessionMovement : ActorFreeMovement 
+{
+
+    private ActorAi _actorAi;
+
+    // State accessor
+
+    public override void Init(Actor parent)
+    {
+        base.Init(parent);
+
+        _actorAi = parent.GetNode<ActorAi>("ActorAi");
+    }
+
+    public override void Move(double delta)
+    {
+        if (_actorAi.Ai is AiState.Controlled) 
+            base.Move(delta);
+    }
+
+}

Scripts/Enemy.cs

@@ -308,17 +308,21 @@ public partial class Enemy : CharacterBody2D
 		Ai = AiState.Controlled;
 	}
 
-	protected enum EnemyState
-	{
-		Idle,
-		Alert,
-		Patrolling
-	}
 	
-	public enum AiState
+
-	{
+	
-		Enabled,
+}
-		Disabled,
+
-		Controlled
+public enum EnemyState
-	}
+{
+	Idle,
+	Alert,
+	Patrolling
+}
+
+public enum AiState
+{
+	Enabled,
+	Disabled,
+	Controlled
 }