Interacting with the 3D preview

If you want to be able to tap on the popups or anything else and have it do something you can do it like follows.

Base class

First I created a base class again, because I wanted a click effect and an outline for the currently selected object.

I used the HighlightPlus asset for this, but you can look if you find something free.

using HighlightPlus;
using System;
using UnityEngine;

public class BaseSelectableObject : MonoBehaviour
{
    public static event Action OnHideAllOutlines;

    private HighlightEffect highlightEffect;

    protected void Init()
    {
        highlightEffect = GetComponent<HighlightEffect>();
        OnHideAllOutlines += BaseSelectableObject_OnHideAllOutlines;
    }

    private void BaseSelectableObject_OnHideAllOutlines()
    {
        highlightEffect.highlighted = false;
    }

    protected void OutlineEffect()
    {
        OnHideAllOutlines?.Invoke();

        highlightEffect.highlighted = true;
        highlightEffect.HitFX();
    }

    public static void HideAllOutlines()
    {
        OnHideAllOutlines?.Invoke();
    }
}

Popup script

Here is the script I used for the left popup to wink when I click it.

You also need a collider for OnMouseUpAsButton() to work.

public class LeftLight : BaseSelectableObject
{
    private void Start()
    {
        Init();
    }

    private void OnMouseUpAsButton()
    {
        if (Utilities.IsOverUI()) { return; }

        OutlineEffect();

        LightController.Instance.WinkLeft();
    }
}

To access the Light controller from everywhere without an extra reference you have to make it a singleton.

To do this you just have to add this to the code of LightController.cs:

public class LightController : BaseArduinoCommunication
{
    public static LightController Instance { get; private set; }

    private void Awake()
    {
        Instance = this;

        //Other code that was in Awake
    }
}

To deselect when you click somewhere else you can add a collider and this script to the ground.

public class Deselect : MonoBehaviour
{
    private void OnMouseDown()
    {
        BaseSelectableObject.HideAllOutlines();
    }
}