Enemy Damage

Scripts/Components/Actors/ActorResourceProvider.cs

@@ -2,7 +2,7 @@
 
 namespace Cirno.Scripts.Components.Actors;
 
-public partial class ActorResourceProvider : Node2D
+public partial class ActorResourceProvider : Node
 {
     [Export]
     public string ResourceName { get; private set; }

Scripts/Components/Actors/DamageReceiver3D.cs

@@ -0,0 +1,104 @@
+using System.Linq;
+using Cirno.Scripts.Resources;
+using Cirno.Scripts.Utils;
+using Cirno.Scripts.Weapons;
+using Godot;
+using Godot.Collections;
+
+namespace Cirno.Scripts.Components.Actors;
+
+public  partial class DamageReceiver3D : Area3D, IHittable
+{
+    [Export] public ActorResourceProvider HealthProvider { get; private set; }
+
+    [Export] public bool Invulnerable { get; private set; } = false;
+
+    [Export] public BulletOwner BulletGroup { get; set; } = BulletOwner.None;
+
+    [Export] public PackedScene Debris { get; set; }
+    
+    [Export] public Array<DamageResistance> DamageResistances { get; set; } = [];
+
+    [Export] public bool DeleteParentOnDeath { get; private set; } = true;
+
+    [Signal]
+    public delegate void ShieldHitEventHandler();
+    
+    [Signal] public delegate void BulletHitEventHandler(Bullet3D bullet, Vector3 position, Vector3 direction);
+    
+    //[Signal] public delegate void DeathEventHandler();
+    
+    private Node3D _parent;
+    
+    public bool Enabled { get; private set; } = true;
+    
+    public override void _Ready()
+    {
+        _parent = GetParent<Node3D>();
+        HealthProvider.FillResource();
+        HealthProvider.ResourceDepleted += OnDeath;
+    }
+
+    public void ChangeState(bool enabled)
+    {
+        Enabled = enabled;
+    }
+    
+    private void _on_damage_hitbox_area_entered(Area3D area)
+    {
+        if (!Enabled) return;
+        if (area is not Bullet3D bullet) return;
+        if (Invulnerable)
+        {
+            EmitSignalShieldHit();
+            return;
+        };
+
+        if (BulletGroup is BulletOwner.None)
+        {
+            this.Hit(bullet.Damage, bullet.DamageType);
+            
+            EmitSignalBulletHit(bullet, area.GlobalPosition, (this.GlobalPosition - area.GlobalPosition).Normalized());
+            
+            bullet.RequestCollisionDestruction();
+            return;
+        }
+
+        if (bullet.BulletInfo.Owner == BulletGroup) return; 
+        
+        this.Hit(bullet.Damage, bullet.DamageType);
+        
+        EmitSignalBulletHit(bullet, area.GlobalPosition, (this.GlobalPosition - area.GlobalPosition).Normalized());
+        
+        bullet.RequestCollisionDestruction();
+    }
+    
+    public void Hit(float damage, DamageType damageType = DamageType.Neutral)
+    {
+        if (!Enabled) return;
+        if (Invulnerable) return;
+        
+        // Change value based on difficulty
+        float difficultyReducedDmg = damage * GlobalState.Instance.SessionSettings.DifficultyDamageMultiplier;
+
+        var dmg = DamageResistances.Aggregate(difficultyReducedDmg, (current, resistance) => current * resistance.CalculateDamage(current, damageType));
+
+        HealthProvider.CurrentResource -= dmg;
+    }
+    
+    private void OnDeath()
+    {
+        if (Debris is not null)
+        {
+            _parent.CreateSibling<Node3D>(Debris);
+        }
+        
+        // Not needed because the health provider is accessible
+        //EmitSignal(SignalName.Death);
+        
+        if (DeleteParentOnDeath)
+        {
+            _parent.QueueFree();
+        }
+    }
+}

Scripts/Components/Actors/DamageReceiver3D.cs.uid

@@ -0,0 +1 @@
+uid://dmawekjfas6k8

Scripts/Components/FSM/Enemy/3D/Dead.cs

@@ -14,6 +14,6 @@ public partial class Dead : EnemyStateBase3D
         base.EnterState();
         // player detection
         // damage receiver will be a module
-        
+        MainObject.Hide();
     }
 }

Scripts/Components/FSM/Enemy/3D/EnemyDamageModule3D.cs

@@ -0,0 +1,55 @@
+using Cirno.Scripts.Components.Actors;
+using Cirno.Scripts.Enums;
+using Godot;
+
+namespace Cirno.Scripts.Components.FSM.Enemy._3D;
+
+public partial class EnemyDamageModule3D : ModuleBase<EnemyState, CharacterBody3D>
+{
+    [Export] public DamageReceiver3D  DamageReceiver { get; private set; }
+    [Export] public EnemyStorage3D StorageModule { get; private set; }
+
+    private IStateMachine<EnemyState, CharacterBody3D> _machine;
+    public override void EnterState(EnemyState state)
+    {
+        DamageReceiver.ChangeState(true);
+        DamageReceiver.HealthProvider.ResourceDepleted += HealthProviderOnResourceDepleted;
+        
+        // DamageReceiver.HealthProvider.ResourceDecreased += HealthProviderOnResourceDecreased;
+    }
+
+    public override void ExitState(EnemyState state)
+    {
+        DamageReceiver.HealthProvider.ResourceDepleted -= HealthProviderOnResourceDepleted;
+        
+        // DamageReceiver.HealthProvider.ResourceDecreased -= HealthProviderOnResourceDecreased;
+        DamageReceiver.ChangeState(false);
+    }
+
+    public override void Init(IStateMachine<EnemyState, CharacterBody3D> machine)
+    {
+        _machine = machine;
+    }
+
+    public override void Process(double delta)
+    {
+        
+    }
+
+    public override void PhysicsProcess(double delta)
+    {
+        
+    }
+    
+    private void HealthProviderOnResourceDecreased(float oldvalue, float newvalue, float maxvalue)
+    {
+        StorageModule.AiState = AiState.Enabled;
+        _machine.SetState(EnemyState.Alert);
+    }
+    
+    private void HealthProviderOnResourceDepleted()
+    {
+        _machine.SetState(EnemyState.Dead);
+    }
+
+}

Scripts/Components/FSM/Enemy/3D/EnemyDamageModule3D.cs.uid

@@ -0,0 +1 @@
+uid://bvcfa6wivpgy1