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

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;
+    }
+}