TraverseExtension Class For https://github.com/neuecc/LINQ-to-GameObject-for-Unity

TraverseExtension.cs

using System.Linq;
using UnityEngine;

// ReSharper disable once CheckNamespace
namespace Unity.Linq
{
    public static class TraverseExtension
    {
        public static Vector3 TotalPositionAncestor(this GameObject origin, int level)
        {
            var position = Vector3.zero;
            var enumerable = origin.Ancestors();
            var count = enumerable.Count();
            count = count <= level ? count : level;

            for (var i = 0; i < count; i++)
            {
                position += enumerable.ElementAt(i).transform.localPosition;
            }

            return position;
        }

        public static Vector3 TotalPositionAncestorSelf(this GameObject origin, int level)
        {
            var position = Vector3.zero;
            var enumerable = origin.AncestorsAndSelf();
            var count = enumerable.Count();
            count = count <= level ? count : level;

            for (var i = 0; i < count; i++)
            {
                position += enumerable.ElementAt(i).transform.localPosition;
            }

            return position;
        }

        /// <summary>
        /// Require RectTransform Component In All Ancestor
        /// </summary>
        /// <param name="origin"></param>
        /// <returns></returns>
        public static Vector3 TotalPositioEndNoChangeSelf(this GameObject origin)
        {
            var array = new GameObject[0];
            // travese but no allocate memory
            var size = origin.AncestorsAndSelf().ToArrayNonAlloc(ref array);
            for (var i = size - 1; i >= 0; i--)
            {
                var rect = array[i].GetComponent<RectTransform>();
                if (rect.anchorMin.Equals(Vector2.zero) && (rect.anchorMax.Equals(Vector2.one) || rect.anchorMax.Equals(Vector2.zero)))
                {
                    array[i] = null;
                    continue;
                }

                break;
            }

            return array.Where(_ => _ != null).Aggregate<GameObject, Vector3>(Vector2.zero, (current, item) => current + item.transform.localPosition);
        }

        /// <summary>
        /// Require RectTransform Component In All Ancestor
        /// </summary>
        /// <param name="origin"></param>
        /// <returns></returns>
        public static Vector3 TotalPositioEndNoChange(this GameObject origin)
        {
            var array = new GameObject[0];
            // travese but no allocate memory
            var size = origin.Ancestors().ToArrayNonAlloc(ref array);
            for (var i = size - 1; i >= 0; i--)
            {
                var rect = array[i].GetComponent<RectTransform>();
                if (rect.offsetMin.Equals(Vector2.zero) && rect.offsetMax.Equals(Vector2.one))
                {
                    array[i] = null;
                    continue;
                }

                break;
            }

            return array.Where(_ => _ != null).Aggregate<GameObject, Vector3>(Vector2.zero, (current, item) => current + item.transform.localPosition);
        }
    }
}