Unity, Create Primitive Object

PrimitiveCreator.cs

using System.Collections.Generic;
using UnityEngine;

namespace NekomimiDaimao
{
    public class PrimitiveCreator
    {
        private const float DefaultScale = 0.2f;

        private readonly PrimitiveType _type;
        private readonly Vector3 _scale;
        private readonly Color _color;

        private readonly List<GameObject> _createObjects;

        #region Constructor

        private PrimitiveCreator(PrimitiveType type, float scale, Color color)
        {
            _type = type;
            _scale = new Vector3(scale, scale, scale);
            _color = color;
            _createObjects = new List<GameObject>();
        }

        public static PrimitiveCreator Initialize(PrimitiveType type, float scale = DefaultScale, Color color = default)
        {
            return new PrimitiveCreator(type, scale, color);
        }

        #endregion

        public GameObject Create(Vector3 position, Transform parent = null, Color? color = null)
        {
            var obj = GameObject.CreatePrimitive(_type);
            var ts = obj.transform;

            if (parent != null)
            {
                ts.SetParent(parent);
            }

            ts.localScale = _scale;
            ts.position = position;

            obj.GetComponent<Renderer>().material.color = color ?? _color;

            _createObjects.Add(obj);

            return obj;
        }

        public GameObject Create(Vector3 position, Color color)
        {
            return Create(position, null, color);
        }


        public void Shrink()
        {
            _createObjects.RemoveAll(o => o == null);
        }

        public void Clear()
        {
            foreach (var gameObject in _createObjects)
            {
                if (gameObject != null)
                {
                    GameObject.Destroy(gameObject);
                }
            }

            _createObjects.Clear();
        }
    }
}