Wayback Machinekoobas.hobune.stream
May JUN Jul
Previous capture 12 Next capture
2021 2022 2023
1 capture
12 Jun 22 - 12 Jun 22
sparklines
Close Help
  • 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 srcurtis493 · Mar 10, 2018 at 11:43 AM · spawning problemsspawnpoints

Don't spawn if spawn point is in use

Hey,

I've had a look around but can't quite find the right stuff to put into this code, so I'd appreciate if someone could help me out.

I'm using the spawn script provided by Unity here: https://unity3d.com/learn/tutorials/projects/survival-shooter/more-enemies

I'm using the spawner to randomly spawn pickups around my map which do not move, however I want to be able to stop them from overlapping each other. Right now if I leave the code running I'll end up with an infinite number of pickups on each location. How would I amend this code to stop a new prefab from being instantiated in the same place as another?

Here is the function I'm using:

 public class GemManager : MonoBehaviour {
 
     public GameObject gem;
     public float spawnTime = 3f;
     public Transform[] spawnPoints;
     public int spawnLimit = 10;
 
     // Use this for initialization
     void Start () {
         InvokeRepeating("Spawn", spawnTime, spawnTime);
     }
     
     void Spawn()
     {
         
         int spawnPointIndex = Random.Range(0, spawnPoints.Length);
 
         Instantiate(gem, spawnPoints[spawnPointIndex].position, spawnPoints[spawnPointIndex].rotation);
 
     }

Thanks for your help!

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
1
Best Answer

Answer by ShadyProductions · Mar 10, 2018 at 12:13 PM

Try this:

 using System.Collections.Generic;
 using UnityEngine;
 
 public class GemManager : MonoBehaviour
 {
 
     public GameObject gem;
     public float spawnTime = 3f;
     public Transform[] spawnPoints;
     public List<Transform> _usedSpawnPoints;
     public int spawnLimit = 10;
 
     // Use this for initialization
     void Start()
     {
         _usedSpawnPoints = new List<Transform>();
         InvokeRepeating("Spawn", spawnTime, spawnTime);
     }
 
     void Spawn()
     {
         int spawnPointIndex = Random.Range(0, spawnPoints.Length);
         if (!_usedSpawnPoints.Contains(spawnPoints[spawnPointIndex]))
         {
             Instantiate(gem, spawnPoints[spawnPointIndex].position, spawnPoints[spawnPointIndex].rotation);
             _usedSpawnPoints.Add(spawnPoints[spawnPointIndex]);
         }
     }
 }

To allow a spawnpoint again just do _usedSpawnPoints.Remove(spawnPoints[spawnPointIndex]);

Comment
Add comment · Show 1 · 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 srcurtis493 · Mar 10, 2018 at 01:20 PM 0
Share

Thanks, got it working with your code! Just need to add in the _usedSpawnPoints.Remove now, but I've coded this game realllllly badly, so I need to rearrange a few things.

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.

Follow this Question

Answers Answers and Comments

75 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 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

How to prevent multiple spawns from a single spawn point? 1 Answer

Is it possible to instantiate a prefab in 2d game from particular locations without using empty game object? 2 Answers

Spawn gameobject in proper spawn position 0 Answers

How to spawn objects using an array of spawn points w/o intersecting 1 Answer

Overlapping on random spawn on random set locations,Need help with overlapping spawning 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