awesome-uiwidgets/AwesomeUIWidgets/Assets/Scripts/RaycastableScene/GameObjectManager.cs

using System.Collections.Generic;
using Unity.UIWidgets.foundation;
using UnityEngine;

namespace UIWidgetsSample.RaycastableScene
{
    public class ObjectItem
    {
        public GameObject obj;
        public Vector3 position;
        public string name;
        public bool active;
    }
    
    public class GameObjectManager : MonoBehaviour
    {
        public GameObject cube;
        public GameObject ball;
        public GameObject cylinder;

        public Transform center;
        public static Transform centerInstance;
        
        public static Dictionary<string, ObjectItem> objects = new Dictionary<string, ObjectItem>();

        public static Vector3? cameraPosition;

        public static Camera cameraInstance;

        public Camera camera;
        
        
        // public static List<GameObject> closeObjects = new List<GameObject>();

        public Vector3 NewPosition()
        {
            int count = objects.Count;
            int sq = (int) Mathf.Sqrt(count);
            int remain = count - sq * sq;
            int r = 0;
            int c = 0;
            if (remain <= sq)
            {
                r = sq;
                c = remain;
            }
            else
            {
                r = 2 * sq - remain;
                c = sq;
            }

            var s = RaycastableSceneConfig.scaterScale;
            return center.position + new Vector3(r * s, c * s, 0);
        }

        public void CreateGameObject(GameObject obj, int count, string name)
        {
            int sq = (int)Mathf.Sqrt(count);
            if (obj)
            {
                 for (int i = 0; i <count; i++)
                 {
                     int r = i % sq;
                     int c = i / sq;
                     int s = 1;
                     var position = NewPosition();
                    var newObj = Instantiate(obj, position, Quaternion.identity);
                    newObj.name = $"{name}{i + 1}";
                    objects.Add(newObj.name, new ObjectItem()
                    {
                        obj = newObj,
                        name = newObj.name,
                        position = newObj.transform.position,
                        active = true
                    }); 
                }
            }
        }
        private void OnEnable()
        {
            centerInstance = center;
            cameraInstance = camera;
            CreateGameObject(cube, RaycastableSceneConfig.cubeCount, RaycastableSceneConfig.cubeName);
            CreateGameObject(ball, RaycastableSceneConfig.ballCount, RaycastableSceneConfig.ballName);
            CreateGameObject(cylinder, RaycastableSceneConfig.cylinderCount, RaycastableSceneConfig.cylinderName);
        }

        
        void Update()
        { 
            if (cameraPosition != null )
            {
                var dif = cameraPosition.Value - camera.transform.position;
                if (dif.sqrMagnitude > RaycastableSceneConfig.delta)
                {
                    camera.transform.position = dif.normalized * (RaycastableSceneConfig.cameraSpeed * Time.deltaTime) 
                                                + camera.transform.position;
                    
                }
            }
        }

        void OnDisable()
        {
            foreach (var obj in objects)
            {
                Destroy(obj.Value.obj);
            }
        }

        public static void FocusOnObject(string name)
        {
            var obj = objects.getOrDefault(name);
            if (obj != null && obj.active)
            {
                cameraPosition = new Vector3(obj.position.x, obj.position.y, cameraInstance.transform.position.z);
            }
        }
        
        public static void MoveCenter(string name)
        {
            var obj = objects.getOrDefault(name);
            if (obj != null)
            {
                obj.obj.transform.position = obj.position;
                obj.active = true;
            }
        }
        
        public static void MoveFar(string name)
        {
            var obj = objects.getOrDefault(name);
            if (obj != null)
            {
                obj.obj.transform.position = RaycastableSceneConfig.far;
                obj.active = false;
            }
        }
    }
}