cirnogodot/Scripts/Tools.cs

using Godot;

namespace Cirno.Scripts;

public static class Tools
{
	public static T CreateChild<T>(this Node2D node, PackedScene prefab) where T : Node2D
	{
		return CreateChild<T>(node, prefab, node.GlobalPosition);
	}

	public static T CreateChild<T>(this Node2D node, PackedScene prefab, Vector2 position) where T : Node2D
	{
		return CreateChildOf<T>(node, node, prefab, position);
		
		// if (prefab == null) return null;
		// var newInstance = prefab.Instantiate<T>();
		// node.GetParent().CallDeferred("add_child", newInstance);
		// // Need to use parent instead of owner because tilemap scenes have no owner
		// //node.Owner.CallDeferred("add_child", newInstance);
		// newInstance.Transform = node.GlobalTransform;
		// newInstance.Position = position;
		//
		// return newInstance;
	}
	
	public static T CreateSibling<T>(this Node2D node, PackedScene prefab) where T : Node2D
	{
		return CreateChildOf<T>(node, node.GetParent<Node2D>(), prefab, node.GlobalPosition);
	} 
	
	public static T CreateSibling<T>(this Node2D node, PackedScene prefab,  Vector2 position) where T : Node2D
	{
		return CreateChildOf<T>(node, node.GetParent<Node2D>(),  prefab, position);
	} 

	public static T CreateChildOf<T>(this Node2D node, Node2D parentNode, PackedScene prefab) where T : Node2D
	{
		return CreateChildOf<T>(node, parentNode, prefab, node.GlobalPosition);
	}
	
	public static T CreateChildOf<T>(this Node2D node, Node2D parentNode, PackedScene prefab, Vector2 position) where T : Node2D
	{
		if (prefab == null)
		{
			GD.PrintErr("Tried to instantiate a null prefab");
			return null;
		}
		
		if (parentNode == null)
		{
			GD.PrintErr("Tried to instantiate child of a null parent");
			return null;
		}
		
		var newInstance = prefab.Instantiate<T>();
		//node.GetParent().CallDeferred("add_child", newInstance);
		parentNode.CallDeferred("add_child", newInstance);
		//newInstance.Transform = node.GlobalTransform;
		newInstance.Position = parentNode.ToLocal(position);

		return newInstance;
	}
}