What is the difference between void start() and void awake()?

WHAT IS THE DIFFERENCE BETWEEN VOID START() AND VOID AWAKE()?


I HAVE SAMPLE SCRIPT PLEASE EXPLAIN THIS

Code (csharp):

1.  
2. private int out;
3.  
4. void Start()
5.  
6. {
7.  
8. out=0;
9.  
10. }
11.  
12.  
13. void awake()
14.  
15. {
16. out=1;
17. }
18.  
19. debug.log("what is the difference?="+out);

 

Awake happens first.

 

http://unity3d.com/support/documentation/ScriptReference/MonoBehaviour.Awake.html
http://unity3d.com/support/documentation/ScriptReference/MonoBehaviour.Start.html

 

start call when the program start but awake call when you initialize the object into that.

 

That is wrong.

The docs clearly say "The difference between Awake and Start is that Start is only called if the script instance is enabled"

 

ya difference between Awake and Start is that Start is only called if the script instance is enabled, i never refuse this. but here i say if both the function have same instance which is first execute.

 

Awake is invoked when the MonoBehaviour is created. You may view it as your default constructor.

Start is a message which is sent to MonoBehaviours when all initialisation is done and the first frame for the behaviour is about to run. As mentioned, disabled behaviours do not get the start message as they are indeed not about to run their first frame.

So the Start message is sent just before the first Update call on the same behaviour. At this point most dependencies should be fully initialised.

A key difference between a function invoke which is used for Awake and a message transmission which is used for Start is that the handler for the latter can be turned into a co-routine.

 

So if you have a game object with a script attached and in the inspector it's disabled, and when you enable that game object the Start function in the script is then activated? Or both Start & awake? been trying to understand that fully for a while now lol

 

You may want to read the "Execution Order of Event Functions" doc.

 

Awake gets called immediately the first time a GameObject is enabled. This is when it's Instantiated for enabled GameObjects, or when ts enabled for disabled ones.

Start gets called immediately before the first frame that a GameObject is enabled for.

The beauty of this system is Awake will be called for all GameObjevts before Start is called. Which is why the two methods exist. Use Awake to set up a Component internally, and Start to set it up externally.

 

In this case both. If your script is disabled it's first of all mono behaviour wasn't created, so Awake function won't invoked. And also if your script is disabled it can't recieve messages, so you message functions like Start, Update, FixedUpdate and LateUpdate, etc also won't work.

 

So, for anyone still confused...

-On a script that is disabled: Nothing is called (No Awake or Start functions called).
-On a enabled script: Awake is called first when an object 'carrying' the script is first activated(enabled/initialized), Start is then called when the game/application proceeds.

This might be of interest to those who need to perform tasks before an object is actually 'instantiated' into the game.

 

Thank you, oh righteous necromancer, saviour of us noobs!

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