• Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
  • Asset Store
  • Get Unity

UNITY ACCOUNT

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account
  • Blog
  • Forums
  • Answers
  • Evangelists
  • User Groups
  • Beta Program
  • Advisory Panel

Navigation

  • Home
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
    • Blog
    • Forums
    • Answers
    • Evangelists
    • User Groups
    • Beta Program
    • Advisory Panel

Unity account

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account

Language

  • Chinese
  • Spanish
  • Japanese
  • Korean
  • Portuguese
  • Ask a question
  • Spaces
    • Default
    • Help Room
    • META
    • Moderators
    • Topics
    • Questions
    • Users
    • Badges
  • Home /
avatar image
0
Question by ethranes · Aug 15, 2016 at 08:16 PM · objecterror messagemousepositionobject referenceobject-reference-error

Object reference not set error

Hi,

I have an "Object reference not set to instance of object error in my game and looking at the line of code that it has the problem with I can't figure out what is going wrong, any help or advice would be appreciated.

Here's a screenshot of the game object that I'm having the issue with-

alt text

Here is the code that has the error with the error message line of code highlighted -

 using UnityEngine;
 using System.Collections;
 
 public class plateSwitch : MonoBehaviour {
 
     public Sprite plate, setting;
     private SpriteRenderer spriteRenderer;
 
     void Start() {
         spriteRenderer = gameObject.GetComponent<SpriteRenderer>();
         SetVolume(PlayerPrefs.GetInt("volume", 50) != 50 ? false : true);
     }
 
     void Update() {
         if(isTouched()) {
             SetVolume(PlayerPrefs.GetInt("volume", 50) != 50 ? true : false);
         }
     }
 
     private void SetVolume(bool IsOn) {
         if(IsOn) {
             spriteRenderer.sprite = plate;
             PlayerPrefs.SetInt("volume", 50);
         } else {
             spriteRenderer.sprite = setting;
             PlayerPrefs.SetInt("volume", 0);
         }
     }
 
     public bool isTouched() {
         bool result = false;
         if(Input.touchCount == 1) {
             if(Input.touches[0].phase == TouchPhase.Ended) {
                 Vector3 wp = Camera.main.ScreenToWorldPoint(Input.GetTouch(0).position);
                 Vector2 touchPos = new Vector2(wp.x, wp.y);
                 if (GetComponent<Collider2D>() == Physics2D.OverlapPoint(touchPos)) {
                     result = true;
                 }
             }
         }
         if(Input.GetMouseButtonUp(0)) {
             ***Vector3 wp = Camera.main.ScreenToWorldPoint(Input.mousePosition);***
             Vector2 mousePos = new Vector2(wp.x, wp.y);
             if (GetComponent<Collider2D>() == Physics2D.OverlapPoint(mousePos)) {
                 result = true;
             }
         }
         return result;
     }
 
 }

I've been stuck with this, and I just don't know enough sharp myself at the moment to solve the issue.

Vector3 wp = Camera.main.ScreenToWorldPoint(Input.mousePosition);

Is the line in question. Thanks again for any help or advice that can point me in the right direction to fix this.

screen-shot-2016-08-15-at-211104.png (477.1 kB)
Comment
Add comment
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

1 Reply

· Add your reply
  • Sort: 
avatar image
2
Best Answer

Answer by lunoland · Aug 15, 2016 at 08:27 PM

Does your Main Camera object have the "MainCamera" tag?

Comment
Add comment · Show 2 · Share
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users
avatar image ethranes · Aug 15, 2016 at 09:12 PM 0
Share

Hi lunoland, it didn't have the main camera tag, the name was set to $$anonymous$$ain Camera, but not the tag, the script is running without any errors now, thanks for your help.

avatar image lunoland ethranes · Aug 15, 2016 at 09:27 PM 0
Share

no problem!

Your answer

Hint: You can notify a user about this post by typing @username

Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.

Welcome to Unity Answers

The best place to ask and answer questions about development with Unity.

To help users navigate the site we have posted a site navigation guide.

If you are a new user to Unity Answers, check out our FAQ for more information.

Make sure to check out our Knowledge Base for commonly asked Unity questions.

If you are a moderator, see our Moderator Guidelines page.

We are making improvements to UA, see the list of changes.



Follow this Question

Answers Answers and Comments

54 People are following this question.

avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image

Related Questions

Is it possible to define a public variable of type UnityEngine.Object? 0 Answers

How can i make the object follow mouse position 1 Answer

Why does this cause an "object reference not set to an instance of an object?" 2 Answers

FSM object reference not set to an instance of an object 0 Answers

NullReferenceException: Object reference not set to an instance of an object PlayerControl.Update () (at Assets/PlayerControl.cs:20) <-lineno:- 0 Answers


Enterprise
Social Q&A

Social
Subscribe on YouTube social-youtube Follow on LinkedIn social-linkedin Follow on Twitter social-twitter Follow on Facebook social-facebook Follow on Instagram social-instagram

Footer

  • Purchase
    • Products
    • Subscription
    • Asset Store
    • Unity Gear
    • Resellers
  • Education
    • Students
    • Educators
    • Certification
    • Learn
    • Center of Excellence
  • Download
    • Unity
    • Beta Program
  • Unity Labs
    • Labs
    • Publications
  • Resources
    • Learn platform
    • Community
    • Documentation
    • Unity QA
    • FAQ
    • Services Status
    • Connect
  • About Unity
    • About Us
    • Blog
    • Events
    • Careers
    • Contact
    • Press
    • Partners
    • Affiliates
    • Security
Copyright © 2020 Unity Technologies
  • Legal
  • Privacy Policy
  • Cookies
  • Do Not Sell My Personal Information
  • Cookies Settings
"Unity", Unity logos, and other Unity trademarks are trademarks or registered trademarks of Unity Technologies or its affiliates in the U.S. and elsewhere (more info here). Other names or brands are trademarks of their respective owners.
  • Anonymous
  • Sign in
  • Create
  • Ask a question
  • Spaces
  • Default
  • Help Room
  • META
  • Moderators
  • Explore
  • Topics
  • Questions
  • Users
  • Badges