• 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
2
Question by fscutaro · May 02, 2013 at 04:24 AM · c#getcomponentaddcomponentgenerics

How to GetComponent from Class that uses Generics

Hi, i'm tweaking a State Machine Class that allows to work with Generics to simplify work. I'm getting an error that i can't decode:

 Assets/Scripts/Entities/Character.cs(60,33): error CS0309: The type `StateMachine<Character>' must be convertible to `UnityEngine.Component' in order to use it as parameter `T' in the generic type or method `UnityEngine.Component.GetComponent<T>()'

Here's the code i'm using:

 _stateMachine = GetComponent<StateMachine<Character>>();

And The State Machine Class format:

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class StateMachine<T> where T : MonoBehaviour {
     
     private List<State<T>> _states = new List<State<T>>();
     
     public void onState()
     {
     }
     public void setState(int state)
     {
 
     }
     /// <summary>
     /// Adds the state.
     /// </summary>
     /// <param name='s'>
     /// a state component.
     /// </param>
     public void addState(State<T> s)
     {
     }
 
 }

Character Class extends MonoBehaviour, so i don't understand what it's the nature of the problem.

Any ideas??

Thanks in advance.

Francisco.

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

Answer by Loius · May 02, 2013 at 05:20 AM

Well it says right there, Statemachine must be convertible to Component. Statemachine must itself be a component. (MonoB is a child of Component).

If it's possible to do it'll look like this:

public class StateMachine : MonoBehaviour where T : MonoBehaviour

You might have more luck with StateMachine as a parent class/interface rather than a generic.

Comment
Add comment · 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

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

14 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

Related Questions

Implicit type GetComponent call 0 Answers

Getting variables by their names? 3 Answers

How should I use the Generic versions of GetComponent and AddComponent? 3 Answers

Why do I get a "Can't add component because class doesn't exist!" error using generic AddComponent? 3 Answers

How to get a component from an object and add it to another? (Copy components at runtime) 12 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