Destroy Gameobject not Working

Unity Engine
1

This is a bullet in a Game…But when i shot the bullet it hits a obstacle (With BoxCollision2D) but the bullet doesnt get destroyed…?..Why…?

using UnityEngine;

public class Projebehav : MonoBehaviour
{
public float Speed = 4.5f;

private void Update()
{
transform.position += -transform.right * Time.deltaTime * Speed;
}

private void OnCollisionEnter2D(Collision2D collision)
{
Destroy(gameObject);
}
}

2

Great question. This will help you answer it:

To help gain more insight into your problem, I recommend liberally sprinkling Debug.Log() statements through your code to display information in realtime.

Doing this should help you answer these types of questions:

  • is this code even running? which parts are running? how often does it run? what order does it run in?
  • what are the values of the variables involved? Are they initialized? Are the values reasonable?
  • are you meeting ALL the requirements to receive callbacks such as triggers / colliders (review the documentation)

Knowing this information will help you reason about the behavior you are seeing.

You can also put in Debug.Break() to pause the Editor when certain interesting pieces of code run, and then study the scene

You could also just display various important quantities in UI Text elements to watch them change as you play the game.

If you are running a mobile device you can also view the console output. Google for how on your particular mobile target.

Here’s an example of putting in a laser-focused Debug.Log() and how that can save you a TON of time wallowing around speculating what might be going wrong:

https://discussions.unity.com/t/839300/3

Be very sure you are meeting 100% of the requirements for receiving physics callbacks. See the documentation for specific requirements for your use case.

If you post a code snippet, ALWAYS USE CODE TAGS:

How to use code tags: https://discussions.unity.com/t/481379

3

Is OnCollisionEnter2D getting called? Is there a Rigidbody2D on this object?

4

Hey am I allowed to send Youtube Links in here? I watched this tutorial:

But the bullets arent getting destroyed when i hit something

5

Excellent!

How to do tutorials properly:

Tutorials are a GREAT idea. Tutorials should be used this way:

Step 1. Follow the tutorial and do every single step of the tutorial 100% precisely the way it is shown. Even the slightest deviation (even a single character!) generally ends in disaster. That’s how software engineering works. Every single letter must be spelled, capitalized, punctuated and spaced (or not spaced) properly. Fortunately this is the easiest part to get right.

Be a robot. Don’t make any mistakes. BE PERFECT IN EVERYTHING YOU DO HERE.

If you get any errors, learn how to read the error code and fix it. Google is your friend here. Do NOT continue until you fix the error. The error will probably be somewhere near the parenthesis numbers (line and character position) in the file. It is almost CERTAINLY your typo causing the error, so look again and fix it.

Step 2. Go back and work through every part of the tutorial again, and this time explain it to your doggie. See how I am doing that in my avatar picture? If you have no dog, explain it to your house plant. If you are unable to explain any part of it, STOP. DO NOT PROCEED. Now go learn how that part works. Read the documentation on the functions involved. Go back to the tutorial and try to figure out WHY they did that. This is the part that takes a LOT of time when you are new. It might take days or weeks to work through a single 5-minute tutorial. Stick with it. You will learn.

Step 2 is the part everybody seems to miss. Without Step 2 you are simply a code-typing monkey and outside of the specific tutorial you did, you will be completely lost.

Of course, all this presupposes no errors in the tutorial. For certain tutorial makers (like Unity, Brackeys, Imphenzia, Sebastian Lague) this is usually the case. For some other less-well-known content creators, this is less true. Read the comments on the video: did anyone have issues like you did? If there’s an error, you will NEVER be the first guy to find it.

Beyond that, Step 3, 4, 5 and 6 become easy because you already understand!

6

That doesn’t really help, because I have to assume that whatever is in the tutorial actually works, and there is something different about your project than the tutorial which makes it not work. But you’re not able to say what that difference is (not an accusation, just an observation that if you knew what was wrong you would have just fixed it instead of posting the thread).

So I’d start investigating with the questions I asked in comment #3. In order to tell if a function is called, just add a Debug.Log statement to it by the way.