A Unity compass script to point in app objects towards a real world location

CompassBehaviour.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro;
using System;
using UnityEngine.SceneManagement;

public class CompassBehaviour : MonoBehaviour {
  //script for having an object point towards an IRL point in space from within the app using phone location and orientation.
  
  private bool startTracking = false;

  //holds location of phone (location services must be accessed and permissions asked)
  private float currentLatitude;
  private float currentLongitude;

  //set destination long and lat here
  private float destinationLatitude = 43.6389881f;
  private float destinationLongitude = -79.3821859f;

  //calculate compass bearing from one location to another
  private float angleFromCoordinate(float lat1, float long1, float lat2, float long2)
  {
    lat1 *= Mathf.Deg2Rad;
    lat2 *= Mathf.Deg2Rad;
    long1 *= Mathf.Deg2Rad;
    long2 *= Mathf.Deg2Rad;

    float dLon = (long2 - long1);
    float y = Mathf.Sin(dLon) * Mathf.Cos(lat2);
    float x = (Mathf.Cos(lat1) * Mathf.Sin(lat2)) - (Mathf.Sin(lat1) * Mathf.Cos(lat2) * Mathf.Cos(dLon));
    float brng = Mathf.Atan2(y, x);
    brng = Mathf.Rad2Deg * brng;
    brng = (brng + 360) % 360;
    brng = 360 - brng;
    return brng;
  }

  void Start() {
    Input.compass.enabled = true;
    Input.location.Start();
    StartCoroutine(InitializeCompass());
  }

  void Update() {
    if (startTracking) {
        currentLatitude = Input.location.lastData.latitude;
        currentLongitude = Input.location.lastData.longitude;
      
      float bearing = angleFromCoordinate(currentLatitude, currentLongitude, destinationLatitude, destinationLongitude);
       //smooth the rotation as it continually updates 
      transform.rotation = Quaternion.Slerp(transform.rotation, Quaternion.Euler(0, 0, Input.compass.magneticHeading + bearing), 100f);
      }
  }

  IEnumerator InitializeCompass() {
    yield return new WaitForSeconds(1f);
    startTracking |= Input.compass.enabled;
  }

  //function to calculate distance to destination
  private float currentDistanceToDestination(float currentLat, float currentLong, float destinationLat, float destinationLong){
		float latSquare = Mathf.Pow((destinationLat - currentLat), 2);
		float longSquare = Mathf.Pow((destinationLong - currentLong), 2);
		return Mathf.Sqrt(latSquare + longSquare);

  }
  //function to return true or false depending on distance to destination and a given allowance/accuracy.
  private bool arrivedAtDestination (float dist, float allowance) {
       if (dist <= allowance) {
			return true;
		}
		
  }


}