Question about Update vs FixedUpdate

Questions & Answers
1

I’m creating a player controller for a 2d platformer without using the CharacterController component. All of my collisions are detected using raycasts.

My question is: Should I do all of my collisions+movement in a FixedUpdate call or in Update with movement as a factor of Time.deltaTime ?

I’m not sure if there is a significant difference, but I’ve noticed strange behavior running in browser on slower machines while currently using FixedUpdate. Thanks for any input.

2

FixedUpdate should really only be used when you’re dealing with some sort of physics interaction. FixedUpdate is also at a (obviously) fixed frame step, and a maximum allowed time step, which is specifically for normalizing physics across varying machines.

You may want to consider raycasting and controlling the raycasts in update, and any physics / rigidbody movement in FixedUpdate.