Fixing Jittery Movement In Godot 

I like the explanations, I get a better grasp if I get the why instead of a "it's common standard"

This actually helps me with my jitter problem in my 2D game! Thanks!

This reminds me of techniques used in online multiplayer games. Interpolation plays an important role in smoothing the client-side animations regardless of low/laggy update packets coming from the authoritative server. Btw, you should definitely talk about multiplayer synchronization techniques! Things like client-side prediction and server reconciliation, etc. :)

This worked for my fps camera great, thanks so much. For this wondering how to achieve the jitter fix for a first person camera, here's my current working code for Godot 4.2.2, which sits on the camera itself. A couple of notes: - linear_interpolate() has been shortened to lerp() -If you rotate the camera directly, your code will probably look more like Garbaj's. I had to modify it because of the way my player is set up. extends Camera3D @export var player_controller:PlayerController # The node with the script containing the player's direction var @export var player_eyes:Node3D # The node that rotates my camera. You might not need this. func _process(delta): self.global_basis = player_eyes.global_basis var fps = Engine.get_frames_per_second() var lerp_interval = player_controller.direction / fps var lerp_position = player_eyes.global_transform.origin + lerp_interval if fps > 60: # The value here should be the same as the project's physics ticks per second, as Garbaj said, # because the jitter comes from the game outputting higher FPS than physics ticks. self.set_as_top_level(true) self.global_transform.origin = self.global_transform.origin.lerp(lerp_position, 20 * delta) else: self.global_transform = player_controller.global_transform self.set_as_top_level(false)

To reduce visual lag you can do a projected position. position + (position - prevPosition). The tradeoff would be a "glitch in the matrix" when a prediction is too different from the actual next physics position (should be minimal).

This is one of the things that Godot REALLY needs to improve; stuff like this should be handled automatically like in Unity. Recommending setting your monitor to 60hz or using a smoothing-addon is not good, especially for a beginner.

I am from Russia and do not speak English well. It is better to use get_physics_interpolation_fraction () for interpolation rather than get_frames_per_second (). If you use get_frames_per_second (), it is impossible to remove ALL the jitter/support/hangs. You have a special case, because fps ratio of physics and graphics 1/2 Try your code at different fps ratios of physics and graphics. For example - physics: 47fps, graphics: 60fps, etc. A slight tug will appear. --- var fraction = Engine.get_physics_interpolation_fraction() player_body.global_transform.origin = last_physics_pos.linear_interpolate(global_transform.origin, fraction)

THANK YOU!!!! Exactly what i was looking for! Really needed it for my 2d game... But i didn't want sprites to be set toplevel obviously, so a made a little change. I made a Vector2 "globals_sprites_position" variable that will replace global_transform.origin var FPS = Engine.get_frames_per_second() var lerp_interval = velocity / FPS var lerp_position = global_position + lerp_interval globals_sprites_position = globals_sprites_position.lerp(lerp_position, 20 * delta) Sprites.position = globals_sprites_position - global_position works just fine

My solution: If you are on a more modern version of godot, you can just go project settings>common>set physics fps from 60 to the refresh rate you need, you will need to re adjust your player speed but after that it's a definitive solution, then, from the inspector, check your camera process from idle to physics as well, jittering causes when stuff is not called simultaneosly, so assuring that player and camera updates are synchronized in my case removed the problem completely

i really like the format of these Godot engine tutorials, very concise and well presented information relevant to specific tasks that game devs need to code their own projects using this platform. Many thanks @Garbaj

You read my mind, I've been struggling with this this past week.

Thank you so much for this tutorial, I was having such a headache trying to fix this

that's a good method. I had done something similar in the past by measuring the time between frames, honestly...your method is cleaner.

Boi for 3d iam just waiting for Godot 4.0 And now Learning 2d

godot lately have an explosion of high quality tutorials.

Just want you to know. I've been faced with this problem all over years and now everything has been resolved. Million Thanks!!!

There's a really useful Smoother plugin for Godot 4 that can do this automatically just by adding a Smoother node to your scene tree!

Finally I found the right tutorial for what I want. But actually, I will still write my own way of jitter reduction for my intention specific.

This just helped me solve the mystery of why, after upgrading to a gaming monitor with a 144Hz refresh rate over my old 60Hz monitor, Godot suddenly seemed to have "broken" physics! Thank you! Your content is not such "garbaj" after all!

you could do alllllllllll of that or do this project > project settings > common (under physics make sure advanced settings are on) and set physics jitter fix to 0 this worked for me in godot 4.2.2!

Thanks! Garbaj Sometimes My player would just j-j-jitter everywhere at this fixed it!

Can you do a video about viewmodel rendering. separating the viewmodel fov and the main fps camera fov is something ive been looking around for. its possible to do using two cameras, one rendering the viewmodel to a separate viewport and then extracting that texture data and overlaying to the main camera. Ive been trying to implement this but have faced problems.

Amazing Video!! Keep the hard work buddy!

Using _physics_process instead of _process already helped a lot, thanks. Jitter is so annoying.

i was using the _process function before this, even just moving my movement to the physics process function has fixed the problem

If anybody's running into this issue with Godot 4 go to Project Settings > Physics > Common and tick 'Physics Interpolation.' I do not know why it's not turned on by default

Can you make a complementary video (or text) showing how to do this on the camera like you talked about in the end?

Can you make scopes with magnification? Probably do like a viewport in a mesh or something. I don't know. Would be nice

Isn't the physics jitter fix option right below the physics fps at 0:25 meant for that? I thought I had read something like that about it, but idk if and how it works.

There is a plugin for both Godot 3 and 4 that adds physics interpretation. I forget what it's called, but it should be easy to find.

Thank you for the tutorial. Can you please do a tutorial on 3D fog of war ?

Even though the interpolation causes input lag I think it gives the feeling of weight with the the character like there is some velocity to it

Your _physics_process() function has a minor bug, your object speed is not independent of update cycles. At the moment if you increased your physics to 60Hz, your object would move twice as fast. I recommend you use the delta passed in: direction = direction.normalized() * speed * delta ; This will ensure the object moves at a constant rate of 5 units per-second irrespective of your physics update rate. Interpolation will always lag behind the true state of the game world, the only way to get closer to the actual state of the game world is to increase the rendering rate, however you'll never reach the actual current state. In my own game-engine I built the interpolation into my 'draw' objects, this way the developer can update the position/scale/rotation of an object and leave the render to deal with the interpolation and frame rate passing.

Hey..! Uploaded good stuff man....I came here after my final term and I think you will be going to make cod or valorant like game from godot....

I believe they will be fixing this in Godot 4. I hope they make it transparent and automatic to the user, so we don't have to do this madness! thanks for the explanation.

I always had this Problem, now everything ist super smooth

1:14 It's probably not the correct solution but while I was trying to figure out how to fix jitter, I eventually just gave up and moved all my move_and_slide() code into the _process function and just multiplied all my movement vectors by 'delta' and defined my speeds for movement in terms of 'm/s'. Delta is always the length of time that has passed since the last frame. No matter how fast or slow the framerate gets, everything moves at the correct speed. Again probably not the correct solution for various reasons but after pulling my hair out for 2 weeks trying to fix the problems I had with jitter and sliding and other issues, doing that simple change just fixed everything so I said screw it and went with it.

can you do a tutorial on "earth bending"? So like raise the ground and take a piece out of it or something

Great video! However, things like this should be taken care of by the engine and not be fixed with hacky workarounds by the user.

Coming from Unity to Godot and Godot C# feels like there is no thought process or design behind implementation! everything feels like a mess & work-around.

gold like always

It doesn't look like a perfect solution, but a solution nonetheless. I'll save this tip for later if I ever need it.

I am using process delta for move and slide. I read that we should be using physics process. But there’s the frame rate issue. I will try to fix the issue with your suggestion

intrepid on steam is a godot game which clearly has this jitter issue on camera.

thanks bro it helped Alot

Hey do potato laptop make games??😩😩😩

i think i saw a video about how delta work and you just need to actualise half the value before moving the target and the other half after or something like that. Might be completely useless and not what you're searching for tho. idk

what about for rotation for a first-person controller?

Hey garbaj... Can u make a tutorial on adding hands to the fps gun.... I want but I am finding it hard...

Does it mean that you have to copy paste the interpolation code in _process() for every "interpolated" node?

Hmm.. I wonder world you save a lot of resources cutting the physics to say 20 and having process lerp at 60. It's collision that kills frame rate after all. I guess it depends on the game and you're best off playing with it. Nice tip, thanks!

Would I need to regulate my animation speed to match with this added interpolation? Since the jitter and timesteps are very minute, I assume it wouldn't be necessary.

hello friend It would be great if you could do a quake style bunny jump tutorial if you have time greetings!

Nice vid but can you make one on a toggleable third-person and first-person viewer, like in minecraft? If that's possible. Or maybe just a ladder tutorial lol

I still wonder if this method can fix my projectile bullets that sometimes didn't register collision issue or not, maybe I'll take some time to do this if I have time to spare.

Can you please make a video on destructible terrain like minecraft but not blocky ?

thank you :)

I thought delta is used for this?

Thx it helped 🙏

Would a formula similar to this also work for updating rotational values rather than position?

the ones that don't have monitor to see whats the diference =/ PS: btw the video is good :P

🤩🤩🤩🤩🔥🔥

Vhy would you create 3 variables for a single line command, you dont need that. The code will look messier, but it is no needed to befair. Would look messy but creating 3 new vars in scope and then destroying them when scope ends ir kind of redundant. Or have them as globals... creating variables every FPS if you have hunderds is kinda wasteful...

can you make a tutorial about portals? like in Portal 2?

Is it the same process for 2D as well? Wish I could have a solution for 2D.

A plugin exists for just this. lawnjellys fixed timestep interpolation plugin for godot. github.com/lawnjelly/smoothing-addon you should check it out. Although the problem with working with it is you need to restructure your scenes.

Couldnt this also be fixed by turning VSync on? Godot Physics rate is set to 60 fps by default. VSync locks the framerate at 60 fps.

What about a 3D segmented snake tutorial? I am thinking about adding a snake boss (like in Risk of Rain or Terraria) to my game. I know how to implement similar thing in GMS2, but I have no clue how to make it in Godot with all three dimensions. I can't find any information about segmented "snakes", but this demo video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-9Iqo2ieiTFI.html

orrrrrr just use the smoothing node

so good and tasty

i wasn't able to translate this into a 2d fix, someone plz help, what do i put in place of the "mesh"?

please throwing ax (by spinning) tutorial (like god of war)

I've never had this issue but also my PC is shit so...

нифига не андерстенд, но лайк поставлю

Can you make a tutorial for a fortnite style build system

Is there a reason not to use tweens ?

I have a 2D project with a jittering problem, if I copy and pasted the code for my player would this help?

Just turn on Vsync.

Shouldn't the engine take care of this?

I'd use tweens instead

4:50 was that 69 intentional?

Or you can use delta

Why don't you just change the physics FPS and don't write all that extra code and all that stuff ?

for me work with disabling v-synce