CODEWITHSUNDEEP
unity-game-engine
systemdebt
systemdebt

Reputation: 4941

Should I use Start or Update to call the given method in Unity3d

1.I have a class in which I have a method called ProjectileMotion() with return type IEnumerator and this method is being called from Start(). 2. The above script is attached to a prefab that is instantiated from another class.

Problem:

In IENumerator ProjectileMotion() method, I need to have updated position of an object which is moving continuously,so I declared

//assigned the o=gameobject to it and it is moving continuously
Public Transform Target;

In ProjectileMotion(), if I do Target.transform,position, it gives the starting position only and not where it was at the time of instantiation of the prefab to which this script is attached, However, I am able to get the updated position of Target in Update method(checked using Debug.Log).

But I can not call the ProjectileMotion() in Update method of course, what should I do to get updated position of Target every time the prefab is instantiated and so the script is called.

Upvotes: 0

Views: 55

Answers (1)

War
War

Reputation: 8618

Simply put ...

If you want the code to execute when the component is "started" then call it on start.

OR

If you want the code to execute each frame after the component has started then call it on update.

Judging by the name of this method I would think this is something that updates the position of a projectile after a gun has instantiated it. The position being updated is likely a per frame operation so.

I would put this in the update method.

EDIT:

UNLESS ...

Does this function do a multiframe animation?

Unity has the concept of coroutines that allow to do certain actions of several frames. in this case you might be better off doing something like this in your start method ...

StartCoroutine(ProjectileMotion)

Upvotes: 1

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