campfire/Assets/Scripts/BackpackAccessor.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Valve.VR;
using Valve.VR.InteractionSystem;

public class BackpackAccessor : MonoBehaviour {
    public Backpack Backpack;

    [Header("Actions")]
    public SteamVR_Action_Boolean[] GrabActions;
    [Tooltip("Should GrabAction become true or false when grabbing?")]
    public bool GrabOnBoolean = false;

    public SteamVR_Action_Boolean[] StoreActions;
    [Tooltip("Should StoreAction become true or false when dropping an item in the backpack?")]
    public bool StoreOnBoolean = false;

    private Hand Hand;

    private void OnEnable() {
        Hand = GetComponent<Hand>();
        foreach (SteamVR_Action_Boolean GrabAction in GrabActions) {
            GrabAction.AddOnChangeListener(OnGrabActionChange, Hand.handType);
        }
        foreach (SteamVR_Action_Boolean StoreAction in StoreActions) {
            StoreAction.AddOnChangeListener(OnStoreActionChange, Hand.handType);
        }
    }

    private void OnDisable() {
        foreach (SteamVR_Action_Boolean GrabAction in GrabActions) {
            GrabAction.RemoveOnChangeListener(OnGrabActionChange, Hand.handType);
        }
        foreach (SteamVR_Action_Boolean StoreAction in StoreActions) {
            StoreAction.RemoveOnChangeListener(OnStoreActionChange, Hand.handType);
        }
    }

    private void OnGrabActionChange(SteamVR_Action_Boolean actionIn, SteamVR_Input_Sources inputSources, bool newValue) {
        if (newValue == GrabOnBoolean) {
            Backpack.Grab(Hand);
        }
    }

    private void OnStoreActionChange(SteamVR_Action_Boolean actionIn, SteamVR_Input_Sources inputSources, bool newValue) {
        if (newValue == StoreOnBoolean) {
            Backpack.Store(Hand);
        }
    }
}