Hit collider problem

Question

Hi guys,

I've a problem with this code. I always end up with null reference and can't find a solution

using UnityEngine; using System.Collections;

public class MyTapHandler : MonoBehaviour {

 public GameObject tapper;
 
 // reference to our tap gesture recognizer object
 public TapGestureRecognizer tapRecognizer;
 
 void Start()
 {
     
     // register to the tap recognizer's OnTap event
     tapRecognizer.OnTap += tapRecognizer_OnTap;
 }
       
 
 // our tap event handler method
 void tapRecognizer_OnTap( TapGestureRecognizer source )
 {
     GameObject obj = PickObject( source.Position );

if( obj.GetInstanceID() == tapper.GetInstanceID()){ Debug.Log( "You tapped "); }else{ Debug.Log( "You didn't pressed the right object" );}

 }
 
 GameObject PickObject (Vector2 screenPos){
     

     
 Ray ray = Camera.main.ScreenPointToRay( screenPos );
 RaycastHit hit = new RaycastHit();
         
     if ( Physics.Raycast( ray, out hit ) ) {
                 
         return hit.collider.gameObject;

     } else{
     
     return null;

}

} }

Answer 1

Here is a clean code version

 using UnityEngine;

using System.Collections;

public class MyTapHandler : MonoBehaviour {

 public GameObject tapper;
 
 // reference to our tap gesture recognizer object
 public TapGestureRecognizer tapRecognizer;
 
 void Start()
 {
     
     // register to the tap recognizer's OnTap event
     tapRecognizer.OnTap += tapRecognizer_OnTap;
 }
       
 
 // our tap event handler method
 void tapRecognizer_OnTap( TapGestureRecognizer source )
 {
     GameObject obj = PickObject( source.Position );

if( obj.GetInstanceID() == tapper.GetInstanceID())

     Debug.Log( "You tapped ");
 else
     Debug.Log( "You didn't pressed the right object" );
     

 }
 
 GameObject PickObject (Vector2 screenPos){
     

     
 Ray ray = Camera.main.ScreenPointToRay( screenPos );
 RaycastHit hit = new RaycastHit();
     
     if ( Physics.Raycast( ray, out hit ) ) 
                 
         return hit.collider.gameObject;

      else
     
     return null;

}

And here the console error:

NullReferenceException: Object reference not set to an instance of an object

MyTapHandler.tapRecognizer_OnTap (.TapGestureRecognizer source) (at Assets/Scripts/MyTapHandler.cs:24) TapGestureRecognizer.RaiseOnTap () (at Assets/Plugins/FingerGestures/Components/TapGestureRecognizer.cs:177) TapGestureRecognizer.OnActive (IFingerList touches) (at Assets/Plugins/FingerGestures/Components/TapGestureRecognizer.cs:133) GestureRecognizer.OnUpdate (IFingerList touches) (at Assets/Plugins/FingerGestures/Components/Base/GestureRecognizer.cs:181) FGComponent.FingerGestures_OnFingersUpdated () (at Assets/Plugins/FingerGestures/Components/Base/FGComponent.cs:34) FingerGestures.Update () (at Assets/Plugins/FingerGestures/FingerGestures.cs:973)

Hit collider problem

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