Show hotspot icon when In interactive boundary

jrush64

Hi,

So I'm trying to do this. When the player is in the interactive boundary, I want an icon to show over the hotspot using the SetIconVisibility function.

This is the code.

`using UnityEngine;
using System.Collections.Generic;

namespace AC
{

/**
 * Used to limit a Hotspot's interactivity to Players that are within a given volume.
 * Attach this to a Trigger collider, and assign in a Hotspot's Inspector. When assigned, the Hotspot will only be interactable when the Player is within the collider's boundary.
 */
[AddComponentMenu("Adventure Creator/Hotspots/Interactive boundary")]
[HelpURL("https://www.adventurecreator.org/scripting-guide/class_a_c_1_1_interactive_boundary.html")]
public class InteractiveBoundary : MonoBehaviour
{

    #region Variables

    protected bool forcePresence;
    protected List<GameObject> playersPresent = new List<GameObject>();
    private Hotspot currentSpot;

    #endregion


    #region UnityStandards


    private void OnEnable()
    {
        currentSpot = GetComponent<Hotspot>();
    }



    protected void OnTriggerEnter (Collider other)
    {
        if (KickStarter.player && other.gameObject == KickStarter.player.gameObject && !playersPresent.Contains (other.gameObject))
        {
            currentSpot.SetIconVisibility(true, 5f);
            playersPresent.Add (other.gameObject);
        }
    }


    protected void OnTriggerExit (Collider other)
    {
        if (KickStarter.player && other.gameObject == KickStarter.player.gameObject && playersPresent.Contains (other.gameObject))
        {
            currentSpot.SetIconVisibility(false, 5f);

            playersPresent.Remove (other.gameObject);
        }
    }


    protected void OnTriggerEnter2D (Collider2D other)
    {
        if (KickStarter.player && other.gameObject == KickStarter.player.gameObject && !playersPresent.Contains (other.gameObject))
        {
            playersPresent.Add (other.gameObject);
        }
    }


    protected void OnTriggerExit2D (Collider2D other)
    {
        if (KickStarter.player && other.gameObject == KickStarter.player.gameObject && playersPresent.Contains (other.gameObject))
        {
            playersPresent.Remove (other.gameObject);
        }
    }

    #endregion


    #region GetSet

    /** True if the active Player is within the Collider boundary */
    public bool PlayerIsPresent
    {
        get
        {
            if (forcePresence)
            {
                return true;
            }
            return (KickStarter.player && playersPresent.Contains (KickStarter.player.gameObject));
        }
    }


    /** If True, the Player will always be considered as present within the Collider boundary, even when not physically so */
    public bool ForcePresence
    {
        set
        {
            forcePresence = value;
        }
    }

    #endregion

}

}`

However when I enter the boundary, it doesnt work. I get;

"NullReferenceException: Object reference not set to an instance of an object
AC.InteractiveBoundary.OnTriggerEnter (UnityEngine.Collider other) (at Assets/AdventureCreator/Scripts/Object/InteractiveBoundary.cs:50)
"

ChrisIceBox

What is on line 50, and is it attached to a Hotspot?

jrush64

        currentSpot.SetIconVisibility(true, 5f);

This is the interactive boundary script attached to the interactive boundary object. The interactive boundary object is a child of the hotspot.

ChrisIceBox

You're setting currentSpot to the Hotspot attached to the same object:

currentSpot = GetComponent<Hotspot>();

Remove this, and make currentSpot public so that you can assign it to the correct Hotspot in the Inspector.

jrush64

Alright its working thanks. How do i change the icon that shows?

ChrisIceBox

It's either a fixed texture for all Hotspots, or each Hotspot's first-defined Use icon, depending on the Settings Manager's Hotspot icon type field.