Basic boss patterns

Scripts/Actors/RogueliteEnemySpawner.cs

@@ -62,6 +62,7 @@ public partial class RogueliteEnemySpawner : Marker2D
             Item = mapTheme.EnemiesLootTable.Items.ToList().Shuffle().First(),
             Chance = mapTheme.EnemyDropChance
         });
+        
         _spawnedEnemy.ExtraLoot.Add(new LootDrop()
         {
             Item = mapTheme.PointItemResource,

Scripts/Resources/FSMMovementPattern.cs

@@ -0,0 +1,58 @@
+using Cirno.Scripts.Actors;
+using Cirno.Scripts.AttackPatterns;
+using Godot;
+
+namespace Cirno.Scripts.Resources;
+
+[GlobalClass]
+public partial class FSMMovementPattern : AttackPattern
+{
+    [Export] private Vector2 relativeTargetPosition;
+    [Export] private float moveDuration = 2f;
+    [Export] private Tween.TransitionType transitionType = Tween.TransitionType.Linear;
+    [Export] private Tween.EaseType easeType = Tween.EaseType.InOut;
+
+    public override IPatternMachine MakeMachine(Node2D parent)
+    {
+        return new FSMMovementPatternMachine(this, parent);
+    }
+
+    public class FSMMovementPatternMachine(FSMMovementPattern pattern, Node2D parent) : IPatternMachine
+    {
+        public Node2D Parent => parent;
+        
+        private Tween tween;
+        private bool isComplete = false;
+
+        protected IScriptHost Boss;
+    
+        public void Start()
+        {
+            if (parent is not IScriptHost boss)
+                return;
+        
+            Boss = boss;
+            tween = Parent.CreateTween();
+            isComplete = false;
+
+            Vector2 targetPosition = (Boss?.HomePosition ?? Parent.GlobalPosition) + pattern.relativeTargetPosition;
+        
+            boss.ChangeSpriteDirection(-(Parent.GlobalPosition - targetPosition));
+            tween.TweenProperty(Parent, "global_position", targetPosition, pattern.moveDuration)
+                .SetTrans(pattern.transitionType)
+                .SetEase(pattern.easeType)
+                .Finished += () =>
+            {
+                isComplete = true;
+                boss.ChangeSpriteDirection(Vector2.Zero);
+            };
+        }
+
+        public void UpdatePattern(double delta) { }
+
+        public bool IsComplete()
+        {
+            return isComplete;
+        }
+    }
+}

Scripts/Resources/FSMMovementPattern.cs.uid

@@ -0,0 +1 @@
+uid://bj3v4rlov86gw