knockback component

interfaces/IDamageDealer.cs

@@ -2,7 +2,7 @@ using Godot;
 
 namespace Movementtests.interfaces;
 
-public interface IDamageMaker
+public interface IDamageDealer
 {
     [Export]
     RDamage RDamage { get; set; }

interfaces/IDamageable.cs

@@ -1,9 +1,12 @@
 using System;
+using Godot;
 
 namespace Movementtests.interfaces;
 
+public record DamageRecord(Node3D Source, RDamage Damage);
+
 public interface IDamageable
 {
-    event Action<IDamageable, float> DamageTaken;
-    float TakeDamage(RDamage damage);
+    event Action<IDamageable, DamageRecord> DamageTaken;
+    DamageRecord TakeDamage(DamageRecord damageRecord);
 }

interfaces/IHealthable.cs

@@ -12,5 +12,5 @@ public interface IHealthable
     
     float CurrentHealth { get; set; }
     
-    void ReduceHealth(IDamageable source, float amount);
+    void ReduceHealth(IDamageable source, DamageRecord damageRecord);
 }

interfaces/IKnockbackable.cs

@@ -1,6 +1,11 @@
+using Godot;
+
 namespace Movementtests.interfaces;
 
 public interface IKnockbackable
 {
+    [Export] RKnockback RKnockback { get; set;}
     
+    public void RegisterKnockback(IDamageable source, DamageRecord damageRecord);
+    public Vector3 ComputeKnockback();
 }

maps/GYMs/enemies.tscn

@@ -16,7 +16,6 @@
 
 [sub_resource type="Resource" id="Resource_2e4ci"]
 script = ExtResource("2_sysok")
-DamageDealt = 10.0
 metadata/_custom_type_script = "uid://jitubgv6judn"
 
 [sub_resource type="ProceduralSkyMaterial" id="ProceduralSkyMaterial_0xm2m"]
@@ -145,6 +144,7 @@ MovementInputs = ExtResource("7_caohq")
 HealthInputs = SubResource("Resource_ybosk")
 DamageInputs = ExtResource("9_dmw1t")
 Target = NodePath("../Player")
+IsActiveOnStart = false
 
 [node name="FlyingSpawner" parent="." node_paths=PackedStringArray("Target") instance=ExtResource("6_7m3bq")]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 18, 11, -14)
@@ -153,3 +153,4 @@ MovementInputs = ExtResource("10_spw1u")
 HealthInputs = ExtResource("11_2e4ci")
 DamageInputs = ExtResource("9_gp7s3")
 Target = NodePath("../Player")
+IsActiveOnStart = false

player_controller/Scripts/PlayerController.cs

@@ -7,7 +7,9 @@ using Movementtests.systems;
 using Movementtests.player_controller.Scripts;
 using RustyOptions;
 
-public partial class PlayerController : CharacterBody3D, IDamageable, IKnockbackable, IDamageMaker
+public partial class PlayerController : CharacterBody3D, 
+	IDamageable, 
+	IDamageDealer
 {
 	// Enums
 	public enum AllowedInputs
@@ -33,7 +35,7 @@ public partial class PlayerController : CharacterBody3D, IDamageable, IKnockback
 	// Signals and events //
 	///////////////////////////
 
-	public event Action<IDamageable, float> DamageTaken;
+	public event Action<IDamageable, DamageRecord> DamageTaken;
 	
 	///////////////////////////
 	// Public stuff //
@@ -1735,9 +1737,9 @@ public partial class PlayerController : CharacterBody3D, IDamageable, IKnockback
 		}
 	}
 
-	public float TakeDamage(RDamage damage)
+	public DamageRecord TakeDamage(DamageRecord damageRecord)
 	{
-		var finalDamage = CDamage.TakeDamage(damage);
+		var finalDamage = CDamage.TakeDamage(damageRecord);
 		DamageTaken?.Invoke(this, finalDamage);
 		return finalDamage;
 	}
@@ -1757,7 +1759,7 @@ public partial class PlayerController : CharacterBody3D, IDamageable, IKnockback
 		foreach (var body in bodies)
 		{
 			if(body is IDamageable spawnable) 
-				spawnable.TakeDamage(RDamage);
+				spawnable.TakeDamage(new DamageRecord(this, RDamage));
 		}
 	}
 }

resource_definitions/RDamageModifier.cs

@@ -6,7 +6,7 @@ using Movementtests.systems.damage;
 [GlobalClass]
 public partial class RDamageModifier : Resource, IDamageable
 {
-    public event Action<IDamageable, float> DamageTaken;
+    public event Action<IDamageable, DamageRecord> DamageTaken;
     
     [Export]
     public EDamageTypes DamageType = EDamageTypes.Normal;
@@ -24,11 +24,14 @@ public partial class RDamageModifier : Resource, IDamageable
         DamageType = damageType;
     }
 
-    public float TakeDamage(RDamage damage)
+    public DamageRecord TakeDamage(DamageRecord damageRecord)
     {
-        if (damage.DamageType != DamageType) return 0;
-        var finalDamage = damage.DamageDealt * Modifier;
-        DamageTaken?.Invoke(this, finalDamage);
-        return finalDamage;
+        if (damageRecord.Damage.DamageType != DamageType) 
+            return damageRecord with { Damage = new RDamage(0, damageRecord.Damage.DamageType) };
+        
+        var finalDamage = damageRecord.Damage.DamageDealt * Modifier;
+        var finalDamageRecord = damageRecord with { Damage = new RDamage(finalDamage, damageRecord.Damage.DamageType) };
+        DamageTaken?.Invoke(this, finalDamageRecord);
+        return finalDamageRecord;
     }
 }

resource_definitions/RKnockback.cs

@@ -0,0 +1,19 @@
+using Godot;
+using System;
+using Movementtests.interfaces;
+
+[GlobalClass]
+public partial class RKnockback : Resource
+{
+    [Export]
+    public float Modifier = 1.0f;
+    
+    public RKnockback()
+    {
+        Modifier = 1.0f;
+    }
+    public RKnockback(float modifier)
+    {
+        Modifier = modifier;
+    }
+}

resource_definitions/RKnockback.cs.uid

@@ -0,0 +1 @@
+uid://b44cse62qru7j

resource_definitions/RMovement.cs

@@ -6,6 +6,8 @@ public partial class RMovement : Resource
 {
     [Export(PropertyHint.Range, "0,10,0.1,or_greater")]
     public float Speed;
+    [Export(PropertyHint.Range, "0,10,0.1,or_greater")]
+    public float Acceleration;
     
     [Export(PropertyHint.Range, "0,20,1,or_greater")]
     public float TargetHeight;
@@ -13,11 +15,13 @@ public partial class RMovement : Resource
     public RMovement()
     {
         Speed = 3.0f;
+        Acceleration = 1.0f;
         TargetHeight = 10.0f;
     }
-    public RMovement(float speed, float targetHeight)
+    public RMovement(float speed, float acceleration, float targetHeight)
     {
         Speed = speed;
+        Acceleration = acceleration;
         TargetHeight = targetHeight;
     }
 }

scenes/damage/CDamageable.cs

@@ -5,18 +5,19 @@ using Movementtests.interfaces;
 [GlobalClass]
 public partial class CDamageable : Node, IDamageable
 {
-    public event Action<IDamageable, float> DamageTaken;
+    public event Action<IDamageable, DamageRecord> DamageTaken;
     
     [Export]
     public RDamageModifier[] DamageModifiers { get; set; }
 
 
-    public float TakeDamage(RDamage damage)
+    public DamageRecord TakeDamage(DamageRecord damageRecord)
     {
         var finalDamage = 0f;
         foreach (var damageable in DamageModifiers.ToIDamageables())
-            finalDamage += damageable.TakeDamage(damage);
-        DamageTaken?.Invoke(this, finalDamage);
-        return finalDamage;
+            finalDamage += damageable.TakeDamage(damageRecord).Damage.DamageDealt;
+        var finalDamageRecord = damageRecord with { Damage = new RDamage(finalDamage, damageRecord.Damage.DamageType) };
+        DamageTaken?.Invoke(this, finalDamageRecord);
+        return finalDamageRecord;
     }
 }

scenes/enemies/Enemy.cs

@@ -3,37 +3,53 @@ using Godot;
 using Movementtests.interfaces;
 
 [GlobalClass]
-public partial class Enemy : CharacterBody3D, IDamageable, IDamageMaker, IHealthable, IKillable, IMoveable, ISpawnable
+public partial class Enemy : CharacterBody3D, 
+	IDamageable, 
+	IDamageDealer, 
+	IHealthable, 
+	IKillable, 
+	IMoveable, 
+	ISpawnable,
+	IKnockbackable
 {
-	public event Action<IDamageable, float> DamageTaken;
+	// Signals and events
+	public event Action<IDamageable, DamageRecord> DamageTaken;
 	public event Action<IHealthable, float> HealthChanged;
 	public event Action<IHealthable> HealthDepleted;
 
+	// Public export components
 	[Export]
 	public Node3D Target { get; set; }
 	
+	[ExportGroup("Health")]
 	[Export]
 	public Node CHealth { get; set; }
 	[Export]
 	public RHealth RHealth { get; set; }
-    
-	public float CurrentHealth { get; set; }
 	
+	[Export]
+	public RDeathEffect[] DeathEffects { get; set; }
+	
+	[ExportGroup("Damage")]
 	[Export]
 	public Node CDamage { get; set; }
-
 	[Export]
 	public RDamage RDamage { get; set; }
+	[Export]
+	public Node CKnockback { get; set; }
+	[Export]
+	public RKnockback RKnockback { get; set; }
 	
+	[ExportGroup("Movement")]
 	[Export]
 	public Node CMovement { get; set; }
 	[Export]
 	public RMovement RMovement { get; set; }
-
-
-	[Export]
-	public RDeathEffect[] DeathEffects { get; set; }
 	
+	// Public stuff
+	public float CurrentHealth { get; set; }
+	
+	// Private stuff
 	private Area3D _damageBox;
 	
 	public override void _Ready()
@@ -52,12 +68,17 @@ public partial class Enemy : CharacterBody3D, IDamageable, IDamageMaker, IHealth
 			healthable.RHealth = RHealth;
 			healthable.CurrentHealth = RHealth.StartingHealth;
 		}
+		if (CKnockback is IKnockbackable knockbackable && RKnockback != null) knockbackable.RKnockback = RKnockback;
 	}
 
 	public void SetupSignals()
 	{
 		_damageBox.BodyEntered += OnDamageBoxTriggered;
-		if (CDamage is IDamageable damageable) damageable.DamageTaken += ReduceHealth;
+		if (CDamage is IDamageable damageable)
+		{
+			damageable.DamageTaken += ReduceHealth;
+			damageable.DamageTaken += RegisterKnockback;
+		}
 		if (CHealth is IHealthable healthable) healthable.HealthDepleted += Kill;
 	}
 	
@@ -74,6 +95,7 @@ public partial class Enemy : CharacterBody3D, IDamageable, IDamageMaker, IHealth
 			delta: delta
 		);
 		Velocity = ComputeVelocity(inputs);
+		Velocity += ComputeKnockback();
 		MoveAndSlide();
 	}
 	
@@ -85,25 +107,28 @@ public partial class Enemy : CharacterBody3D, IDamageable, IDamageMaker, IHealth
 
 	public void OnDamageBoxTriggered(Node3D body)
 	{
-		GD.Print("Take this!");
 		if (body is not IDamageable damageable) return;
-		damageable.TakeDamage(RDamage);
+		
+		var damageRecord = new DamageRecord(this, RDamage);
+		damageable.TakeDamage(damageRecord);
 	}
 
-	public float TakeDamage(RDamage damage)
+	public DamageRecord TakeDamage(DamageRecord damageRecord)
 	{
-		GD.Print("Ouch!");
-		if (CDamage is not IDamageable damageable) return 0;
+		if (CDamage is not IDamageable damageable)
+			return damageRecord with { Damage = new RDamage(0, damageRecord.Damage.DamageType) };
 		
-		var finalDamage = damageable.TakeDamage(damage);
-		DamageTaken?.Invoke(this, damage.DamageDealt);
+		var finalDamage = damageable.TakeDamage(damageRecord);
+		DamageTaken?.Invoke(this, finalDamage);
+		
+		GD.Print($"Received damage: {finalDamage.Damage.DamageDealt}");
 		return finalDamage;
 	}
 
-	public void ReduceHealth(IDamageable source, float amount)
+	public void ReduceHealth(IDamageable source, DamageRecord damageRecord)
 	{
 		if (CHealth is not IHealthable healthable) return;
-		healthable.ReduceHealth(source, amount);
+		healthable.ReduceHealth(source, damageRecord);
 	}
 
 	public void Kill(IHealthable source)
@@ -114,4 +139,16 @@ public partial class Enemy : CharacterBody3D, IDamageable, IDamageMaker, IHealth
 		}
 		QueueFree();
 	}
+
+	public void RegisterKnockback(IDamageable source, DamageRecord damageRecord)
+	{
+		if (CKnockback is not IKnockbackable knockbackable) return;
+		knockbackable.RegisterKnockback(source, damageRecord);
+	}
+
+	public Vector3 ComputeKnockback()
+	{
+		if (CKnockback is not IKnockbackable knockbackable) return Vector3.Zero;
+		return knockbackable.ComputeKnockback();
+	}
 }

scenes/enemies/grounded_enemy/grounded_enemy.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=17 format=3 uid="uid://dxt0e2ugmttqq"]
+[gd_scene load_steps=19 format=3 uid="uid://dxt0e2ugmttqq"]
 
 [ext_resource type="Script" uid="uid://bn7sc6id7n166" path="res://scenes/enemies/Enemy.cs" id="1_r6506"]
 [ext_resource type="Resource" uid="uid://otfc2snh8umc" path="res://scenes/enemies/grounded_enemy/grounded_enemy_damage.tres" id="2_bn56u"]
@@ -9,9 +9,12 @@
 [ext_resource type="Script" uid="uid://b0u23nkpaimyc" path="res://scenes/damage/CDamageable.cs" id="7_1tw73"]
 [ext_resource type="PackedScene" uid="uid://dbr7ioio158ew" path="res://scenes/movement/CGroundedMovement.tscn" id="7_qyswd"]
 [ext_resource type="Script" uid="uid://dtpxijlnb2c5" path="res://resource_definitions/RMovement.cs" id="8_6d4gl"]
+[ext_resource type="PackedScene" uid="uid://bctpe34ddamg5" path="res://scenes/knockback/CKnockback.tscn" id="10_jqqi6"]
+[ext_resource type="Resource" uid="uid://cektf6waf4s04" path="res://scenes/enemies/grounded_enemy/grounded_enemy_knockback.tres" id="11_8k3xb"]
 
 [sub_resource type="Resource" id="Resource_qj0ob"]
 script = ExtResource("2_r3cnf")
+Modifier = 3.0
 metadata/_custom_type_script = "uid://b6y3ugfydvch0"
 
 [sub_resource type="Resource" id="Resource_6d4gl"]
@@ -35,17 +38,19 @@ albedo_color = Color(0.06469653, 0.06469653, 0.06469653, 1)
 [sub_resource type="BoxShape3D" id="BoxShape3D_4yfjf"]
 size = Vector3(1, 2, 2)
 
-[node name="GroundedEnemy" type="CharacterBody3D" node_paths=PackedStringArray("CHealth", "CDamage", "CMovement")]
+[node name="GroundedEnemy" type="CharacterBody3D" node_paths=PackedStringArray("CHealth", "CDamage", "CKnockback", "CMovement")]
 collision_layer = 16
 collision_mask = 273
 script = ExtResource("1_r6506")
 CHealth = NodePath("CHealth")
 RHealth = ExtResource("2_w4lm8")
+DeathEffects = Array[Object]([])
 CDamage = NodePath("CDamageable")
 RDamage = ExtResource("2_bn56u")
+CKnockback = NodePath("CKnockback")
+RKnockback = ExtResource("11_8k3xb")
 CMovement = NodePath("CGroundedMovement")
 RMovement = ExtResource("4_na24f")
-DeathEffects = Array[Object]([])
 
 [node name="CHealth" type="Node" parent="."]
 script = ExtResource("2_gsmti")
@@ -61,6 +66,8 @@ metadata/_custom_type_script = "uid://b0u23nkpaimyc"
 RMovement = SubResource("Resource_6d4gl")
 WallInFrontRayCast = NodePath("../WallInFrontRayCast")
 
+[node name="CKnockback" parent="." instance=ExtResource("10_jqqi6")]
+
 [node name="CollisionShape3D" type="CollisionShape3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0)
 shape = SubResource("CapsuleShape3D_62kkh")

scenes/enemies/grounded_enemy/grounded_enemy_knockback.tres

@@ -0,0 +1,8 @@
+[gd_resource type="Resource" script_class="RKnockback" load_steps=2 format=3 uid="uid://cektf6waf4s04"]
+
+[ext_resource type="Script" uid="uid://b44cse62qru7j" path="res://resource_definitions/RKnockback.cs" id="1_vdia8"]
+
+[resource]
+script = ExtResource("1_vdia8")
+Modifier = 100.0
+metadata/_custom_type_script = "uid://b44cse62qru7j"

scenes/enemies/grounded_enemy/grounded_enemy_movement.tres

@@ -5,4 +5,5 @@
 [resource]
 script = ExtResource("1_hsy8g")
 Speed = 5.0
+Acceleration = 10.0
 metadata/_custom_type_script = "uid://dtpxijlnb2c5"

scenes/health/CHealth.cs

@@ -18,10 +18,10 @@ public partial class CHealth : Node, IHealthable
         CurrentHealth = RHealth.StartingHealth;
     }
 
-    public void ReduceHealth(IDamageable source, float amount)
+    public void ReduceHealth(IDamageable source, DamageRecord damageRecord)
     {
         GD.Print(CurrentHealth);
-        CurrentHealth -= amount;
+        CurrentHealth -= damageRecord.Damage.DamageDealt;
         HealthChanged?.Invoke(this, CurrentHealth);
 
         if (CurrentHealth <= 0)

scenes/knockback/CKnockback.cs

@@ -0,0 +1,25 @@
+using Godot;
+using System;
+using Movementtests.interfaces;
+
+[GlobalClass]
+public partial class CKnockback : Node3D, IKnockbackable
+{
+    [Export] public RKnockback RKnockback { get; set;}
+    
+    private DamageRecord _damageRecord = null;
+    
+    public void RegisterKnockback(IDamageable source, DamageRecord damageRecord)
+    {
+        _damageRecord = damageRecord;
+    }
+
+    public Vector3 ComputeKnockback()
+    {
+        if (_damageRecord == null) return Vector3.Zero;
+        
+        var knockbackDirection = GlobalPosition - _damageRecord.Source.GlobalPosition;
+        _damageRecord = null;
+        return knockbackDirection.Normalized() * RKnockback.Modifier;
+    }
+}

scenes/knockback/CKnockback.cs.uid

@@ -0,0 +1 @@
+uid://b8dprpcjeac7e

scenes/knockback/CKnockback.tscn

@@ -0,0 +1,12 @@
+[gd_scene load_steps=4 format=3 uid="uid://bctpe34ddamg5"]
+
+[ext_resource type="Script" uid="uid://b8dprpcjeac7e" path="res://scenes/knockback/CKnockback.cs" id="1_ix2yg"]
+[ext_resource type="Script" uid="uid://b44cse62qru7j" path="res://resource_definitions/RKnockback.cs" id="2_uqiml"]
+
+[sub_resource type="Resource" id="Resource_gbu2d"]
+script = ExtResource("2_uqiml")
+metadata/_custom_type_script = "uid://b44cse62qru7j"
+
+[node name="CKnockback" type="Node3D"]
+script = ExtResource("1_ix2yg")
+RKnockback = SubResource("Resource_gbu2d")

scenes/movement/CGroundedMovement.cs

@@ -19,9 +19,10 @@ public partial class CGroundedMovement : Node3D, IMoveable
 
         var targetPlane = new Vector3(target.X, GlobalPosition.Y, target.Z);
         LookAt(targetPlane);
-		
-        velocity.X = direction.X * RMovement.Speed;
-        velocity.Z = direction.Z * RMovement.Speed;
+        float xAcc = (float) Mathf.Lerp(velocity.X, direction.X * RMovement.Speed, inputs.delta * RMovement.Acceleration);
+        float zAcc = (float) Mathf.Lerp(velocity.Z, direction.Z * RMovement.Speed, inputs.delta * RMovement.Acceleration);
+        velocity.X = xAcc;
+        velocity.Z = zAcc;
 
         if (WallInFrontRayCast.IsColliding())
             velocity.Y = RMovement.Speed;