Closest#

using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Pool;
using VisualScript.Icons;

namespace VisualScript.Runtime
{
    [Get]

    [Title("Closest")]
    [Category("Collections/Closest")]

    [Description("The Game Object of a collection that is nearest to a position")]
    [Image(typeof(IconCompass), ColorTheme.Type.Teal, typeof(BadgeArrowDown))]

    [Parameter("Collection", "The collection the Game Object is picked from")]
    [Parameter("Position", "The position distances are measured from")]

    [Keywords("Near", "Distance", "Sort", "Order", "Pick", "List", "Array")]

    [Serializable]
    public class TypeGameObjectCollectionClosest : TypeGameObject
    {
        [SerializeField] private GetCollectionGameObjects m_Collection = new GetCollectionGameObjects();
        [SerializeField] private GetVector3 m_Position = new GetVector3();

        public override GameObject Get(Args args)
        {
            List<GameObject> buffer = ListPool<GameObject>.Get();

            try
            {
                this.m_Collection.Get(args, buffer);

                Vector3 origin = this.m_Position.Get(args);

                GameObject result = null;
                float bestDistance = 0f;
                bool hasResult = false;

                foreach (GameObject gameObject in buffer)
                {
                    if (gameObject == null) continue;

                    float distance = (gameObject.transform.position - origin).sqrMagnitude;
                    if (hasResult && !(distance < bestDistance)) continue;

                    bestDistance = distance;
                    result = gameObject;
                    hasResult = true;
                }

                return result;
            }
            finally
            {
                ListPool<GameObject>.Release(buffer);
            }
        }

        public override string ToString()
        {
            return $"Closest of {this.m_Collection}";
        }

        protected override SubscriptionMode Subscription => SubscriptionMode.OnChange;
    }
}