Scriptable bullet emitter

Scripts/Resources/BulletScript.cs

@@ -0,0 +1,41 @@
+using System.Linq;
+using Godot;
+using Godot.Collections;
+
+namespace Cirno.Scripts.Resources;
+
+[GlobalClass]
+public partial class BulletScript : Resource
+{
+    [Export]
+    public Array<AttackPattern> Patterns { get; private set; }
+
+    private Node2D _parent;
+    
+    private int _currentPatternIndex = 0;
+    private double _patternTimer;
+    
+    private AttackPattern CurrentPattern => Patterns[_currentPatternIndex];
+
+    public void Start(Node2D parent)
+    {
+        _parent = parent;
+        if (Patterns.Count == 0) return;
+        _currentPatternIndex = 0;
+        
+        CurrentPattern.Start(parent);
+    }
+    
+    public void UpdatePhase(double delta)
+    {
+        _patternTimer += delta;
+     
+        CurrentPattern.UpdatePattern(delta);
+
+        if (!CurrentPattern.WaitForCompletion || CurrentPattern.IsComplete())
+        {
+            _currentPatternIndex = (_currentPatternIndex + 1) % Patterns.Count;
+            CurrentPattern.Start(_parent);
+        }
+    }
+}