Hit collider problem

Questions & Answers
1

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;

}

}
}

2

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)