【Unity】Vector2 の配列やリストで Average を使えるようにする拡張メソッド

ソースコード

using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;

namespace Kogane
{
    public static class Vector2ExtensionMethods
    {
        public static Vector2 Average( this IEnumerable<Vector2> self )
        {
            var enumerable = self as Vector2[] ?? self.ToArray();
            return enumerable.Aggregate( Vector2.zero, ( x, y ) => x + y ) / enumerable.Count();
        }

        public static Vector2 Average<T>( this IEnumerable<T> self, Func<T, Vector2> func )
        {
            var enumerable = self as T[] ?? self.ToArray();
            return enumerable.Aggregate( Vector2.zero, ( x, y ) => x + func( y ) ) / enumerable.Count();
        }
    }
}