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Scripts/Projectiles/ProjectilePool.cs

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+using System.Collections.Generic;
+using Godot;
+
+
+public partial class ProjectilePool : Node
+{
+    [Export] private PackedScene _scene;
+    [Export] private int _poolSize;
+
+    private readonly Queue<Projectile> _pool = new();
+    
+    public override void _Ready()
+    {
+        for (int i = 0; i < _poolSize; i++)
+        {
+            _pool.Enqueue(CreateProjectile());
+        }
+    }
+
+    private Projectile CreateProjectile()
+    {
+        var p = _scene.Instantiate<Projectile>();
+        p.OnDespawn += ReturnToPool;
+        return p;
+    }
+
+    public Projectile Get()
+    {
+        var p = _pool.Count > 0 ? _pool.Dequeue() : CreateProjectile();
+        return p;
+    }
+
+    private void ReturnToPool(Projectile p)
+    {
+        p.GetParent()?.RemoveChild(p);
+        p.ProcessMode = ProcessModeEnum.Disabled;
+        _pool.Enqueue(p);
+    }
+}