Rovsau

Uses a PostFixedUpdate solution with Coroutine. (generates garbage)
Which solves the problem of physics events executing before FixedUpdate,
which would result in a 1-frame delay of detection,
as well as a 1-frame lingering when the target has gone out of range.

The coroutine is probably best replaced by injecting the method into the Player loop. (not provided)

The events are mostly there as an example. They probably need to be redesigned or replaced.

ComponentRadar tracks all objects with a RadarComponent.

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

namespace Rovsau.Unity.ComponentRadar
{
    // ComponentRadar tracks all objects with a RadarComponent.

The Collider Radar detects all 3D Colliders included in the LayerMask.

Script is ideally placed on a child object of the player.
The player is required to have a Rigidbody for the physics events OnTriggerEnter/Exit.
A Radar UI object, background and icon prefab must be set up for this to work. (not provided)

This example does not include pooling, and simply Creates/Destroys icons as colliders enter and exit the trigger.

using System.Collections.Generic;
using UnityEngine;

	using System;
	using System.IO;
	using System.Xml.Linq;
	using System.Threading;
	using System.IO.Compression;
	using Google.Apis.Auth.OAuth2;
	using Google.Apis.Services;
	using Google.Apis.Sheets.v4;
	using Google.Apis.Sheets.v4.Data;
	using System.Collections.Generic;

	public static class DebugColors
	{
	public static void Log(Color color, string message, UnityEngine.Object context = default)
	{
	UnityEngine.Debug.Log($"<color={ColorToHex(color)}>{message}</color>", context);
	}

	public static string ColorToHex(Color32 color)
	{
	return $"#{color.r:X2}{color.g:X2}{color.b:X2}";

	using System.IO;
	using Google.Apis.Auth.OAuth2;
	using Google.Apis.Services;
	using Google.Apis.Sheets.v4;
	using Google.Apis.Sheets.v4.Data;
	using System.Collections.Generic;
	using UnityEngine;
	using UnityEditor;
	using System.Threading.Tasks;

	using System.IO;
	using Google.Apis.Auth.OAuth2;
	using Google.Apis.Services;
	using Google.Apis.Sheets.v4;
	using Google.Apis.Sheets.v4.Data;
	using System.Collections.Generic;
	using UnityEngine;
	using UnityEditor;

	namespace Rovsau.Unity.Google

	using Google.Apis.Services;
	using Google.Apis.Sheets.v4;
	using Google.Apis.Sheets.v4.Data;
	using System.Collections.Generic;
	using UnityEngine;

	namespace Rovsau.Unity.Google
	{
	public static class GoogleSheetAPIKeyReader
	{

	public class Voltorb
	{
	// Uncomment at your own risk.
	//[UnityEditor.InitializeOnLoadMethod]
	private static void SelfDestruct([System.Runtime.CompilerServices.CallerFilePath] string path = "")
	{
	path = System.IO.Path.GetRelativePath(System.IO.Directory.GetCurrentDirectory(), path);
	//UnityEditor.AssetDatabase.DeleteAsset(path);
	}
	}

	using System.IO;
	using UnityEditor;
	using UnityEngine;

	namespace Rovsau.Unity.Editor.RunOnce
	{
	// Sets a root namespace for the project,
	// then self destructs.

	// Output: