Unity Fixed Update Purpose

September 25, 2020

Unity

Fixed Update


Title: GameDev Stream — What is FixedUpdate For?
By: Infallible Code
Youtube – Information
Description: Quick rundown of the main purpose of using fixed update in Unity.


Overview

This video quickly covers the main purpose of using FixedUpdate in Unity. As most Unity users know this is commonly used for containing physics calculations, but they better describe why that is here. They explain that FixedUpdate is much more consistent as it is inherently time based, whereas Update is tied directly to frame rate, which can vary drastically from computer to computer or user to user. This consistency however is what also makes FixedUpdate bad for uses such as user input because they could basically be entering inputs between the FixedUpdates and they will not be picked up at all, which is obviously extremely bad.