Movement for nodes patterns

Scripts/AttackPatterns/NodeMovementPattern.cs

@@ -0,0 +1,56 @@
+using Cirno.Scripts.Resources;
+using Godot;
+
+namespace Cirno.Scripts.AttackPatterns;
+
+[GlobalClass]
+public partial class NodeMovementPattern : 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 NodeMovementPatternMachine(this, parent);
+    }
+
+    public class NodeMovementPatternMachine(NodeMovementPattern pattern, Node2D parent) : IPatternMachine
+    {
+        public Node2D Parent => parent;
+        
+        private Tween tween;
+        private bool isComplete = false;
+    
+        public void Start()
+        {
+            if (Parent is not IScriptHost scriptHost)
+            {
+                GD.PrintErr("Parent was not a script host");
+                isComplete = true;
+                return;
+            }
+            
+            tween = Parent.CreateTween();
+            isComplete = false;
+
+            Vector2 targetPosition = (scriptHost?.HomePosition ?? Parent.GlobalPosition) + pattern.relativeTargetPosition;
+            
+            tween.TweenProperty(Parent, "global_position", targetPosition, pattern.moveDuration)
+                .SetTrans(pattern.transitionType)
+                .SetEase(pattern.easeType)
+                .Finished += () =>
+            {
+                isComplete = true;
+            };
+        }
+
+        public void UpdatePattern(double delta) { }
+
+        public bool IsComplete()
+        {
+            return isComplete;
+        }
+    }
+}