cirnogodot/Scripts/Utils/Tools3D.cs

using Godot;

namespace Cirno.Scripts.Utils;

public static class Tools3D
{
    public static T CreateChild<T>(this Node3D node, PackedScene prefab) where T : Node3D
    {
        return CreateChild<T>(node, prefab, node.GlobalPosition);
    }

    public static T CreateChild<T>(this Node3D node, PackedScene prefab, Vector3 position) where T : Node3D
    {
        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 Node3D node, PackedScene prefab) where T : Node3D
    {
        return CreateChildOf<T>(node, node.GetParent<Node3D>(), prefab, node.GlobalPosition);
    } 
	
    public static T CreateSibling<T>(this Node3D node, PackedScene prefab,  Vector3 position) where T : Node3D
    {
        return CreateChildOf<T>(node, node.GetParent<Node3D>(),  prefab, position);
    } 

    public static T CreateChildOf<T>(this Node3D node, Node3D parentNode, PackedScene prefab) where T : Node3D
    {
        return CreateChildOf<T>(node, parentNode, prefab, node.GlobalPosition);
    }
	
    public static T CreateChildOf<T>(this Node3D node, Node3D parentNode, PackedScene prefab, Vector3 position) where T : Node3D
    {
        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;
    }
}