Question How can I throw a object to an location where the camera is aimed at?

I'm creating a AR game where the player can throw an object. The problem is that the object can only be thrown at the direction of where the camera is aimed at the start of the game. So after loading the object and throwing it, it doesn't matter where I stand with my device. Even when I stand on the opposite with my device, the ball will instead going forward be aimed at me while swiping my finger forward.

How can I make sure the ball will be throwed to where my camera is aiming at?

code for swiping the ball

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class SwipeScript : MonoBehaviour {
6.  
7.     Vector2 startPos, endPos, direction; // touch start position, touch end position, swipe direction
8.     float touchTimeStart, touchTimeFinish, timeInterval; // to calculate swipe time to sontrol throw force in Z direction
9.  
10.     [SerializeField]
11.     float throwForceInXandY = 1f; // to control throw force in X and Y directions
12.  
13.     [SerializeField]
14.     float throwForceInZ = 50f; // to control throw force in Z direction
15.  
16.     Rigidbody rb;
17.  
18.     void Start()
19.     {
20.         rb = GetComponent<Rigidbody> ();
21.     }
22.  
23.     // Update is called once per frame
24.     void Update () {
25.  
26.         // if you touch the screen
27.         if (Input.touchCount > 0 && Input.GetTouch (0).phase == TouchPhase.Began) {
28.  
29.             // getting touch position and marking time when you touch the screen
30.             touchTimeStart = Time.time;
31.             startPos = Input.GetTouch (0).position;
32.         }
33.  
34.         // if you release your finger
35.         if (Input.touchCount > 0 && Input.GetTouch (0).phase == TouchPhase.Ended) {
36.  
37.             // marking time when you release it
38.             touchTimeFinish = Time.time;
39.  
40.             // calculate swipe time interval
41.             timeInterval = touchTimeFinish - touchTimeStart;
42.  
43.             // getting release finger position
44.             endPos = Input.GetTouch (0).position;
45.  
46.             // calculating swipe direction in 2D space
47.             direction = startPos - endPos;
48.  
49.             // add force to balls rigidbody in 3D space depending on swipe time, direction and throw forces
50.             rb.isKinematic = false;
51.             rb.AddForce (- direction.x * throwForceInXandY, - direction.y * throwForceInXandY, throwForceInZ / timeInterval);
52.  
53.             // Destroy ball in 4 seconds
54.             Destroy (gameObject, 3f);
55.  
56.         }
57.            
58.     }
59. }