What is the difference between Update() , LateUpdate() , FixedUpdate(), and when i should use them

Questions & Answers
1

Update() , LateUpdate() and FixedUpdate()

what is the difference between these and when i should use one of them and is it wrong to use Update() all the time?

2

Check out this link on Update Order

4
  • Update() is called on every Frame, regardless of time passed since last frame
    • Good for Movement, InputControl etc. (most of the time you’ll use Update)
    • Usually you will use Time.DeltaTime to take passed time into account (e.g. for GameObject Translations)
  • LateUpdate() is called after all Update() methods are processed
    • So e.g. for the camera that follows your character it’s good to Update after it has moved
  • FixedUpdate() is called by the physics engine in fixed intervals (that can be set in the Options)
    • This is basically good for all Physics related functions (trigger, collisions etc.)
3

Don’t forget, @Ziad , that if you are performing camera scripting its best to put it in LateUpdate(). That way the movement calculations have already been done.