Add new components: HealComponent, HitComponent, HomingMissileMotionComponent, LeverComponent, and TriggerLeverComponent

scripts/components/HealComponent.cs

@@ -0,0 +1,48 @@
+using Godot;
+using Mr.BrickAdventures.scripts.Resources;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+public partial class HealComponent : Node
+{
+    [Export] public GpuParticles2D HealFx { get; set; }
+    [Export] public CollectableComponent Collectable { get; set; }
+
+    public override void _Ready()
+    {
+        if (Collectable == null)
+        {
+            GD.PushError("HealComponent: Collectable is not set.");
+            return;
+        }
+        
+        Collectable.Collected += OnCollected;
+    }
+
+    private void OnCollected(Variant amount, CollectableType type, Node2D body)
+    {
+        if (type != CollectableType.Health) return;
+
+        if (Collectable == null) return;
+        
+        var healthComponent = body.GetNodeOrNull<HealthComponent>("HealthComponent");
+        if (healthComponent == null) return;
+
+        var value = amount.AsSingle();
+        healthComponent.IncreaseHealth(value);
+        if (HealFx != null)
+        {
+            PlayHealFx();
+        }
+        
+        Owner.QueueFree();
+    }
+
+    private void PlayHealFx()
+    {
+        if (HealFx == null) return;
+        
+        HealFx.Restart();
+        HealFx.Emitting = true;
+    }
+}

scripts/components/HitComponent.cs

@@ -0,0 +1,75 @@
+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+public partial class HitComponent : Node
+{
+    [Export] public Sprite2D Sprite { get; set; }
+    [Export] public HealthComponent Health { get; set; }
+    [Export] public float HitDuration { get; set; } = 0.1f;
+    [Export] public GpuParticles2D HitFx { get; set; }
+    [Export] public bool FlashMode { get; set; } = true;
+
+    public override void _Ready()
+    {
+        if (Health != null)
+        {
+            Health.HealthChanged += OnHealthChange;
+            Health.Death += OnDeath;
+        }
+
+        if (Sprite == null)
+        {
+            GD.PushError("HitComponent: Sprite is null");
+            return;
+        }
+
+        if (Sprite.Material != null && FlashMode)
+        {
+            Sprite.Material = (Material)Sprite.Material.Duplicate();
+        }
+    }
+
+    private void Activate()
+    {
+        if (!FlashMode) return;
+
+        Sprite.SetInstanceShaderParameter("enabled", true);
+    }
+
+    private void Deactivate()
+    {
+        if (!FlashMode) return;
+        
+        Sprite.SetInstanceShaderParameter("enabled", false);
+    }
+
+    private async void OnHealthChange(float delta, float totalHealth)
+    {
+        if (!(delta < 0f)) return;
+        
+        Activate();
+        await ToSignal(GetTree().CreateTimer(HitDuration), Timer.SignalName.Timeout);
+        Deactivate();
+            
+        if (totalHealth > 0f && delta < 0f)
+        {
+            HandleHitFx();
+        }
+    }
+
+    private async void OnDeath()
+    {
+        Activate();
+        await ToSignal(GetTree().CreateTimer(HitDuration), Timer.SignalName.Timeout);
+        Deactivate();
+    }
+
+    private void HandleHitFx()
+    {
+        if (HitFx == null) return;
+        
+        HitFx.Restart();
+        HitFx.Emitting = true;
+    }
+}

scripts/components/HomingMissileMotionComponent.cs

@@ -0,0 +1,64 @@
+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+public partial class HomingMissileMotionComponent : Node
+{
+    [Export] public LaunchComponent Launch { get; set; }
+    [Export] public float MaxSpeed { get; set; } = 16f;
+    [Export] public float Acceleration { get; set; } = 8f;
+    [Export] public float MaxTurnRate { get; set; } = 180f; // degrees per second
+    [Export] public float WobbleStrength { get; set; } = 5f; // degrees
+    [Export] public float Drag { get; set; } = 0.98f;
+    [Export] public float SteeringLerp { get; set; } = 0.05f; // low = sluggish, high = responsive
+    [Export] public Area2D DetectionArea { get; set; }
+    
+    private Vector2 _steeringDirection = Vector2.Zero;
+    private Vector2 _velocity = Vector2.Zero;
+    private Node2D _target = null;
+
+    public override void _Ready()
+    {
+        DetectionArea.BodyEntered += OnBodyEntered;
+        _velocity = Launch.GetInitialVelocity();
+    }
+
+    public override void _PhysicsProcess(double delta)
+    {
+        if (Launch == null) return;
+        if (Owner is not Node2D owner) return;
+        if (_target == null)
+        {
+            owner.Position += _velocity * (float)delta;
+            return;
+        }
+        
+        var toTarget = (_target.GlobalPosition - owner.GlobalPosition).Normalized();
+        _steeringDirection = _steeringDirection.Lerp(toTarget, SteeringLerp);
+        
+        var angleToTarget = _velocity.AngleTo(_steeringDirection);
+        var maxAngle = Mathf.DegToRad(MaxTurnRate) * (float)delta;
+        var clampedAngle = Mathf.Clamp(angleToTarget, -maxAngle, maxAngle);
+
+        var rng = new RandomNumberGenerator();
+        var wobble = Mathf.DegToRad(rng.RandfRange(-WobbleStrength, WobbleStrength));
+        clampedAngle += wobble;
+        
+        _velocity = _velocity.Rotated(clampedAngle);
+        _velocity *= Drag;
+
+        var desiredSpeed = Mathf.Min(MaxSpeed, _velocity.Length() + Acceleration * (float)delta);
+        _velocity = _velocity.Normalized() * desiredSpeed;
+        
+        owner.Position += _velocity * (float)delta;
+        owner.Rotation = _velocity.Angle();
+    }
+
+    private void OnBodyEntered(Node2D body)
+    {
+        if (_target != null) return;
+        if (body == null) return;
+        
+        _target = body;
+    }
+}

scripts/components/LeverComponent.cs

@@ -0,0 +1,66 @@
+using System.Threading.Tasks;
+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+public partial class LeverComponent : Node
+{
+    [Export] public Area2D Area { get; set; }
+    [Export] public Sprite2D Sprite { get; set; }
+    [Export] public int StartAnimationIndex { get; set; } = 0;
+    [Export] public float AnimationDuration { get; set; } = 0.5f;
+    [Export] public AudioStreamPlayer2D Sfx { get; set; }
+
+    [Signal]
+    public delegate void ActivatedEventHandler();
+
+    public override void _Ready()
+    {
+        if (Area == null)
+        {
+            GD.PushError("LeverComponent: Area is not set.");
+            return;
+        }
+        
+        if (Sprite == null)
+        {
+            GD.PushError("LeverComponent: Sprite is not set.");
+            return;
+        }
+        
+        Area.BodyEntered += OnBodyEntered;
+        Area.AreaEntered += OnAreaEntered;
+    }
+
+    private void OnAreaEntered(Area2D area)
+    {
+        HandleTriggerLogic(area);
+    }
+
+    private void OnBodyEntered(Node2D body)
+    {
+        HandleTriggerLogic(body);
+    }
+
+    private async Task Activate()
+    {
+        EmitSignalActivated();
+        Sfx?.Play();
+        Sprite.Frame = StartAnimationIndex + 1;
+        var timer = GetTree().CreateTimer(AnimationDuration);
+        await timer.ToSignal(timer, Timer.SignalName.Timeout);
+        Sprite.Frame = StartAnimationIndex;
+    }
+    
+    private void HandleTriggerLogic(Node2D obj)
+    {
+        var triggerLever = obj.GetNodeOrNull<TriggerLeverComponent>("TriggerLeverComponent");
+        if (triggerLever == null)
+        {
+            GD.PushWarning("LeverComponent: TriggerLeverComponent not found in body.");
+            return;
+        }
+
+        _ = Activate();
+    }
+}

scripts/components/TriggerLeverComponent.cs

@@ -0,0 +1,8 @@
+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+public partial class TriggerLeverComponent : Node
+{
+    
+}