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Question by angel_luis · Mar 05, 2021 at 07:53 PM · scriptingbasicsexecution-order

Trying to understand the execution order with more than one script (some questions)

We've the lifecycle chart: https://docs.unity3d.com/Manual/ExecutionOrder.html and also the execution order: https://docs.unity3d.com/Manual/class-MonoManager.html

For example we've a script PlayerController(with execution order 1) and another script CameraController (with execution order 2).

We have in PlayerController:

  • FixedUpdate a function to update the movement.

  • Update a function to get the axis controller.

And we have in CameraController:

  • LateUpdate a function to follow the player movement.

Q1: In the first frame, the player won't move because Update is called after FixedUpdate, but as FixedUpdate can loop more than one time per frame, in what moment FixedUpdate will stop to loop? Just after Update, just before Renderingcycle...?

Q2: Are the callbacks executed in order? For example, 1- Start of PlayerController, then Start of CameraController, then FixedUpdate of PlayerController, then FixedUpdate of CameraController... and so on.

Q3. If the above answer is yes... In the first frame, if we had in PlayerControllera long processing task, it would block the execution of the other scripts?

With that questions I try to understand also if LateUpdatealways will be called after the Update of PlayerController, or if has another order.

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