Problems with Raycasting in Unity 5

I'm trying to create a simple script that shoots out a raycast and then moves Unitys DeothOfField, image effect scripts, focal point to the raycasts hit point. Whenever the ray hits something, I get an error.

Code (csharp):

1.  
2. using UnityEngine;
3. using UnityStandardAssets.ImageEffects;
4. using System.Collections;
5.  
6. public class DOFFocusFinder : MonoBehaviour
7. {
8.     public float maxDistance = 100f;
9.     public Vector3 defaultFocusPoint = new Vector3(0f, 0f, 10f);
10.     public float adjustSpeed = 2f;
11.     public DepthOfField depthOfField;
12.  
13.     private Ray ray = new Ray();
14.     private RaycastHit hit = new RaycastHit();
15.     private Transform focusPoint;
16.  
17.     void Update ()
18.     {
19.         if(Physics.Raycast(transform.position, transform.forward, out hit, maxDistance))
20.             //The error is a null-reference and it directs me to this line
21.             focusPoint.position = Vector3.Lerp(focusPoint.position, hit.point, adjustSpeed * Time.deltaTime);
22.         else
23.             //and also this line, when the raycast doesn't return true
24.             focusPoint.position = Vector3.Lerp(focusPoint.position, transform.position + defaultFocusPoint, adjustSpeed * Time.deltaTime);
25.  
26.         depthOfField.focalTransform = focusPoint;
27.     }
28. }

 

"focusPoint" was never set?

 

Stick this on line 20:

Debug.Log(focusPoint);
Debug.Log(hit);

 

Good call, here's the working code. Basically, just make an empty gameobject and drag it into the focalTransform slot in the DOF script and also drag it into the focusTransform slot on the DOFFocusFinder script.

Code (csharp):

1.  
2. using UnityEngine;
3. using UnityStandardAssets.ImageEffects;
4. using System.Collections;
5.  
6. public class DOFFocusFinder : MonoBehaviour
7. {
8.     public float maxDistance = 100f;
9.     public Vector3 defaultFocusPoint = new Vector3(0f, 0f, 10f);
10.     public float adjustSpeed = 2f;
11.     public Transform focusTransform;
12.     public DepthOfField depthOfField;
13.  
14.     private Ray ray = new Ray();
15.     private RaycastHit hit = new RaycastHit();
16.  
17.     void Start()
18.     {
19.         focusTransform.position = transform.position + (transform.rotation * defaultFocusPoint);
20.     }
21.     void Update ()
22.     {
23.         if(Physics.Raycast(transform.position, transform.forward, out hit, maxDistance))
24.             focusTransform.position = Vector3.Lerp(focusTransform.position, hit.point, adjustSpeed * Time.deltaTime);
25.         else
26.             focusTransform.position = Vector3.Lerp(focusTransform.position, transform.position + (transform.rotation * defaultFocusPoint), adjustSpeed * Time.deltaTime);
27.     }
28. }