Does physics get executed after each scripts FixedUpdate?

Unity Engine
1

Does unity’s physics get updated after each scripts FixedUpdate? or does it only update after every scripts FixedUpdate is complete?

e.g) I have a script that runs code in fixedupdate that moves the player using physics and another script on another object that is set to run afterwards(order of execution settings) that also has code in fixedupdate to draw a ray between itself and the player. Would the player move and then the ray would update with its new position? or would both fixedupdates in the different scripts run before the internal physics moves the player?

2

You can see the execution order here: Unity - Manual: Order of execution for event functions

As you might see the internal physics update happens after FixedUpdate()

3

Thanks for the reply.

I am aware of the physics updating after fixedupdate. However I am wondering if that’s on a per script basis or it only updates after all other fixedupdates in other scripts have ran?.

4

As far as I am aware all physics will be updated after all scripts have been executed. That makes the most sense as some physics depend on other physics to work properly (for example an object falling against another object).

5

I see, so in my example then would the raycast update before the movement of the player is actually applied by the physics engine?

Thanks again =)

6

If you drew the ray in Update instead of FixedUpdate then it would do it correctly every frame and you wouldn’t have to worry about any of this :slight_smile:

7

Do raycasts not have to be in the fixedUpdate to execute properly? due to them being part of the physics?

Cheers for the reply.

8

Not at all.

9

Oh if that’s the case it solves this issue for me =)

Thanks again!