Smoothing Movement with Interpolation | How to Make a Multiplayer Game - Part 3

In this third part of my Unity multiplayer tutorial series, we implement interpolation to smooth out player movement.
Riptide tutorials playlist: • Riptide Multiplayer Tu...
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Source code: github.com/tom-weiland/Riptid...
Changes since part 2: github.com/tom-weiland/Riptid...
RiptideNetworking repo: github.com/tom-weiland/Riptid...
Pirate game devlogs: • Multiplayer Pirate Gam...
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0:00 Intro
0:09 Things that Changed
1:20 Creating a Tick System
4:26 Adding Interpolation
9:48 Things to Note
10:31 Outro
#RiptideNetworking #Multiplayer #UnityTutorial #Unity #GameDev
Over the last year I've been working on a C# networking library called RiptideNetworking, and in this tutorial series I show you how to use it to make a multiplayer game in Unity! Multiplayer game dev is difficult and time-consuming, and Riptide saves you the effort of writing the super low level stuff yourself-it takes care of establishing connections between a client and a server and makes sending data back and forth really easy, while still giving you plenty of control over what your code is doing.
Riptide can be used both in and out of Unity, and it supports a wide variety of game architectures. Whether you need an authoritative server for a competitive shooter you're building or you're just looking to make a multiplayer co-op game where players host their own lobbies (sometimes referred to as peer to peer), RiptideNetworking can help you do that.
At the end of the last video, players were essentially being teleported around every time a client receives a position update from the server, and instability in connections can cause messages to be lost or delayed, both of which make movement look choppy. The tick & interpolation systems we set up in this tutorial are built to account for those situations and smooth out player movement.

[@tomweiland]

This will be the last video of the series, at least for now. I _may_ cover client prediction at some point in the future, but I don't want to make any promises yet-making tutorials is relatively mundane & tedious work, and it's about time I get back to work on my pirate game 😅 *Riptide v2.0.0 is out now:* riptide.tomweiland.net/manual/updates/release-notes/v2.0.0.html Quite a few things have been renamed in v2 which will make it slightly more difficult to follow along with the video, so I recommend using v1.1.0 while watching the tutorials and then updating your project afterwards with the help of the upgrade guide (on the NEW docs site): riptide.tomweiland.net/manual/updates/guides/update-to-v2.html *Important links:* Source code (start of video) ► github.com/tom-weiland/RiptideSampleFPS/tree/part3-beginning Source code (end of video) ► github.com/tom-weiland/RiptideSampleFPS/tree/part3 Things added since part 2 ► github.com/tom-weiland/RiptideSampleFPS/compare/c3f7fde..8f3bfd6 Discord server ► tomweiland.net/discord RiptideNetworking repo ► github.com/tom-weiland/RiptideNetworking Check out my devlogs ► kzbin.info/aero/PLXkn83W0QkfmQI9lUzi--TxJaOFYIN7Q4 Support me via GitHub Sponsors ► github.com/sponsors/tom-weiland

[@focuslabstudios]

Yarr we're looking forward to seeing you return to the pirate game!

[@tomweiland]

@@focuslabstudios same 😅

[@syedmoin7939]

More videos fast??????!!!

[@holdenthompson1449]

Will we be getting a tutorial on how to integrate it into Steam API?

[@Aisbejsijdns]

I Really like your tutorials i hope in future we will get some more awesome tuts :D

[@EmptySkySora]

I feel like cheating for following an interpolation tutorial instead of breaking my head myself. Thank you for doing it for us all. You are great!

[@tomweiland]

Don't worry, you'll have plenty to break your head over once you start working on client prediction and/or lag compensation 😂

[@trainzmarcel2074]

dont reinvent the wheel

[@quickscopesheep5994]

Thank you tom. Have been developing a relatively similar game to your pirate game and both riptide networking and your tutorials have been a saviour. Easily one of the best networking libraries I have used as it is easy to use yet gives fairly low level control. Thank you and good luck with your game

[@tomweiland]

I'm glad you like it! Good luck to you too :D

[@tsunamidev]

when i saw this video in my recommended and comprehended the fact that a new part of this series is out i genuinely screamed with happiness

[@tomweiland]

LOL 👌

[@RSKG]

Something similar happened to me.

[@andrejris7273]

same man

[@JovisSE]

Thanks for explaining interpolation Tom! You really make an intermediate concept look easy :)

[@tomweiland]

Glad it was helpful :D

[@DashM670]

Yesss finally a useful multiplayer tutorial series to make my game with. Thanks so much for creating it. And good luck with your pirate game. :):)

[@tomweiland]

Thank you! Good luck with your own project :)

[@desawwww]

I was waiting for this. Thanks Tom

[@tomweiland]

Took a while 😅

[@radishmouse22]

I love your dedication man. I feel bad getting to take the code you've spent weeks working on and being able to slap it into my project in half an hour. But get to working on your game, not ours :)

[@tomweiland]

Well the good thing is that my game needed a networking solution too, so in a way working on Riptide was/is kind of working on my game at the same time. The more I can decouple things-particularly when they're complicated, like networking stuff-from the rest of the game code, the better :P

[@radishmouse22]

@@tomweiland makes sense

[@soggyaudio4925]

Yes! A new multiplayer video. Can't wait for more 😃

[@tomweiland]

This will probably be the last one for now-I want to get back to work on my pirate game 😅

[@trentlangford9050]

Awesome, works really well. To combat the tick rollover problem I just used uints instead of ushorts, which makes the time to roll over pretty large. Idk if that introduces any complexity or lag but whatever. Thank you for this tutorial!

[@tomweiland]

That's definitely a viable solution-I doubt you'll have a server running for several years straight :P The one downside is that an int/uint uses 4 bytes compared to just 2 for a ushort, so you're sending more bytes every time you send the tick value, but that could arguably be considered a micro-optimization.

[@firkedis]

I saw this in my recommendation right now and I freaking screamed that a new part came

[@tomweiland]

LOL 😂

[@tiagomartins5487]

Great video as always Tom, but sad to hear it's the last in the series!

[@tomweiland]

Most likely only _for now_ though 😅

[@bartoszkowalski885]

tysm Tom! Cant wait for another one :D

[@tomweiland]

This will probably be the last one for now-I want to get back to work on my pirate game 😅

[@dont_smoke_here1188]

Thasnks that was really usfefull, Whole guide is quite calm and clear

[@tomweiland]

Glad to hear it :)

[@jayslex]

Thanks I really need that it is really useful continu the great content!

[@tomweiland]

🙌

[@kojirohiori666]

Hey Tom. thank you for this new series the new videos are great! Not sure if you mentioned by any reason you chose not to use an existing library like LiteNetLib for the pirate game and created Riptide instead? Just curious haha

[@tomweiland]

When I got into multiplayer, I initially tried UNet, hated it, and then went straight to learning the low level stuff, largely because I didn't realize other low level solutions existed. By the time I found out about LNL and other libraries like it, I already had my old solution, and I wanted to try turning into something more usable (aka Riptide) for the learning experience.

[@kojirohiori666]

​@@tomweiland This is very interesting to know! When I first got into multiplayer, I tried using Mirror. But the idea of having the server and client into the same code was really confusing for me (I know it sounds ironic because Mirror is supposed to make it simpler). But your old/new series made the whole concept very clear by separating the server and the client and distinguishing each one's role on the process, so it finally started making sense to me

[@xzippyzachx]

Smoooooooooth tutorial Tom! :p

[@tomweiland]

Lol good one 😂

[@RSKG]

Words can't explain my happiness right now.

[@tomweiland]

😅

[@holdenthompson1449]

I literally needed this video

[@tomweiland]

Good timing then :P

[@holdenthompson1449]

@@tomweiland Excellent timing 👌

[@HarmNone]

Hey Tom it's Mason from school, just wanted to say I'm proud of you dude these videos are awesome and so well done.

[@tomweiland]

Hey! Thanks for the kind words, but I'm curious-how did you come across these videos? Are you building a multiplayer game too now?

[@HarmNone]

@@tomweiland Somebody told me you were doing KZbin videos and I am too so I was curious to see what it was that you were making, I’m not working on a game or anything I was just curious to know :)

[@tomweiland]

@@HarmNone ah gotcha :)

[@mikestewart7914]

Hey Tom, do you think you could do a video covering PvE type of bots and how to implement them with Riptide? I like what you've done so far and I'd like to make something for me and my friends to try together but I'm not great with Enemy AI networking.

[@tomweiland]

I likely won't be making any more tutorials, mainly because of how tedious/time-consuming they are to make and the severely diminishing returns as you get further into a series like this. Making bots wouldn't be too dissimilar to how you'd do it in a singleplayer game-just run the bot AI on the server, and then figure out how you want to sync their behavior, whether that's by informing clients of their next destination or syncing the position explicitly. The last video of my old series covers an extremely rudimentary AI implementation, so you could also take a look at that.

[@JoppieToppie]

I'm currently working on my dream game using riptide! Currently i'm trying to add vehicles to it, do you have any tips how i could implement them? Love the tutorials btw!!

[@tomweiland]

Glad to hear it :) That's a very broad/generic question-if you're not having any specific problems then I'm not sure sort of tips you need from me :P

[@skelo4492]

An amazing video Mr. Weiland. I was just wondering if you'd have some recommendations concerning implementing deterministic physics in a Unity project. It just feels like my client predictions make a lot of errors when running into things. Which library should I use, or is it even worth it?

[@tomweiland]

Have you actually implemented prediction? Or are you maybe just seeing the problems with the interpolation implementation from this video? Take a look at issue #1 on the repo. Deterministic physics are not possible in Unity, at least not with PhysX. I think enabling the enhanced determinism option does make it deterministic on the same machine, but there's no guarantees across different machines (which is obviously the necessary in a multiplayer context) due to differences in floating point number processing or something. However, you really don't need determinism in the vast majority of games. Your prediction logic should correct itself (reconcile) every time you receive a state update from the server, and any small discrepancies that need correcting are relatively easy to smooth out with a bit of interpolation.

[@skelo4492]

@@tomweiland Perhaps I just did it wrong, it's not issue #1, it happens when you run into another player and start both pushing and sliding against his circle collider (my project). I might have tinkered with the correction thresholds back when I implemented the system, so now it often takes a couple of seconds before teleporting me back. I'll probably end up just scrapping player collisions, or make something like minecraft does it. Thank you for the info!

[@tomweiland]

If it's only an issue when two players run into each other then that's kind of to be expected, because they're each predicting their own position but see the other player in the past so they mispredict where the collision between the two *actually* happens, which then leads to corrections. As far as I'm aware there's no easy way to solve this problem-one option is to have clients predict other players' positions, but that's pretty difficult to do well, especially in games where players can suddenly and swiftly change their direction drastically.

[@Reysious]

Great tutorial tom! Wouldn't it be better to use uint for the tick value though? Since the uint max value is way higher

[@tomweiland]

Using a uint would definitely help avoid the wrapping problem (considering it would take 3.4 years to hit the max value at a tick rate of 40), but it's 2 extra bytes you're sending any time you need to "timestamp" data with a tick.

[@Reysious]

@@tomweiland would it be that big of a deal if you send it only once every five sec though? ulong would probably be overkill though 😂

[@Reysious]

nvm, forgot you have to send it each time you send the position data as well, think I'll go with uint anyways though

[@tp-xk8ns]

Yeahhhh bro ❤️❤️❤️

[@tomweiland]

:)

[@ataz1522]

Nah, at this point this is black magic. Thanks for the amazing tutorial.

[@tomweiland]

Glad you like it :D

[@LeadEngineer]

They are quite amazing. Do you plan on continuing it ?

[@tomweiland]

The tutorials? Not really-these first 3 cover the essentials. Tutorials are time consuming and tedious to produce, and they'll also become outdated rather quickly if/when I make major changes to the library.

[@stickguy9109]

Okay I will try my hand in multiplayer again, this time with hope that I won't fail like last time

[@tomweiland]

Good luck :)

[@ianh3385]

To get past the tick ushort issue you could just say if the tick is over like 5 minutes worth increments then make 0 relevant for a while - eg the next comparison of 0 will classify 0 as newer. Alternatively you could just count the number of times it overflows, and then multiply or subtract that from the current tick and store it in a regular int or something? Eg tick sent across network is still ushort but internal tick is int or long - being current tick + ushortmax * overflow times? Then you could write easily get hours of play without any issues?

[@tomweiland]

Using something similar to this method instead of the less/greater than checks would probably do the trick: github.com/tom-weiland/RiptideNetworking/blob/ad1ce59d60fe69db9b7bcbca37854a171dba5e6f/RiptideNetworking/RiptideNetworking/Transports/RudpTransport/RudpPeer.cs#L128 Obviously you'd want to return a bool based on which one is bigger instead of the difference between the two.

[@n0n3x]

Can you please make a tutorial on how to synchronise procedually generated worlds?

[@tomweiland]

Just send the seed over and have the client generate the world based on that.

[@rogerayman4499]

THANKS !!!, but can I make a lobby where I can find the created rooms?

[@tomweiland]

Yes-if you think about it, that's also just a matter of sending data back and forth (pretty much everything multiplayer-related is). If you plan to release on Steam, they also have a lobby API which you can use together with the Steam transport.

[@That1Dev15]

How would i make a system where the player gets a scene from the server instead forcing the client and server to have identical scenes?

[@tomweiland]

If your world is procedurally generated you can just send over the seed and have the client generate it at runtime. If it's a pre-built scene, sending it over probably isn't a great idea. It'd be better to either use one project for both the server and client or use Unity's Package Manager to share the scene file.

[@Bollsjen]

How will Riptide handle host over the internet? Can it open a port or should the host always open a port on the router manually? I have just skimmed the video parts so please refer to what video you talks about this if you do.

[@tomweiland]

You have to portforward to open the server's ports. This applies to player-hosted scenarios as well (the host would have to portforward) although that's only if you want to directly connect players to the host, which I wouldn't recommend since it'll expose the other players' IPs to the host player and vice versa. Player-hosted games typically make use of a relay server-that way players' IPs are hidden from each other and no one has to portforward (other than your relay servers) to play. If you're releasing on Steam you can even use their relay servers for free (via the Steam transport), meaning IPs aren't being exposed, no one has to portforward, and you don't have to pay any hosting costs either.

[@williammartel2659]

This is great

[@tomweiland]

:D

[@akshaygupta3436]

I am able to connect p2p connection between 2 mobile with IPv6, but if player A in a WIFI and other player B also in WIFI so they can't connect/Find to each other.. HELP!!!

[@tomweiland]

Probably because your port isn't forwarded, but if you're developing a mobile game where players are the hosts, you should probably use a relay server instead of _actually_ letting players host, as mobile devices are very prone to connection problems-host player closed the app momentarily to check the time? Connection issues (probably) incoming. That kind of thing.

[@valentinadegrandi9711]

Hello Tom! Could you make a tutorial on your procedural terrain generation? it should be great :D thanks

[@tomweiland]

I'm not really sure what the point in that would be given that it's nothing special-you could watch Sebastian Lague's series on terrain gen and end up with essentially the same thing that I have (if not something better since he covers stuff like LODs which I haven't implemented yet).

[@valentinadegrandi9711]

i've tryied watching him but i had a lot of problems: no colors on start, odd images at the end of chunks, no properly working collision... any suggestion?

[@eleocraft278]

So I'ts very possible that I messed up the code myself at some point while copying parts of it to my project (cause the architecture of my project is quite different), but from my understanding there are problems with the interpolator as soon as the framerate drops below a certain point. then it is possible that the interpolation tick is actually greater than the new tick. in this case the timeToReackTarget is negative or zero, which causes all kinds of problems. Hovewer at least for me the problem seems to be fixed by just making the Update funktion in the interpolator a fixed update.

[@tomweiland]

_"there are problems with the interpolator as soon as the framerate drops below a certain point"_ Interesting, I'll have to look into that 🤔 _"for me the problem seems to be fixed by just making the Update funktion in the interpolator a fixed update"_ I mean at that point you could also just remove the interpolation entirely and send the position updates every tick, as that'd be the same update frequency as interpolating in FixedUpdate...

[@eleocraft278]

@@tomweiland yes, but there are still upsides to having the interpolator. You don't need to send position updates every frame and it's not a big deal if one or two updates get lost

[@talhagenc9401]

Hey Tom! I want you to say thanks you firstly for all your helps to game dev community. But i think it must be tiring for you. Spedin this much time and effort and only getting 10k-50k views. I recommend you to making videos like Trying to Make a Game in 1 day or something like that. It really is understandable if you dont want to keep making videos anymore. But in the way i suggest you believe me you gonna get more views cuz its not based on teaching rahter than entertaining. Trt it love you!

[@tomweiland]

10k views is definitely less than I'd like, although it's to be expected that the further you go in a series, the less people will end up watching the later videos. The whole "trying to make a game in x amount of time" concept doesn't really appeal to me unfortunately-I just don't find that challenge particularly exciting. I'd rather spend that time working on projects I actually care about and want to invest in over the long term, which is why I want to get back to working on pirate game and making devlogs.

[@MyHubbert]

Question. When i connect with two players and the scene change to map1. I have only a blackscreen. The map was load but only see black ^^

[@tomweiland]

That sounds very strange, but troubleshooting in the comments is a pain so I'd suggest joining the Discord server and asking there.

[@Everythingzof]

Why are you encoding/decoding bits manually with RiptideConverter when C# already has BitConverter class that does the same thing?

[@tomweiland]

Because BitConverter is slower (according to my benchmarks) in all cases except those where RiptideConverter uses it. All of the BitConverter.GetBytes overloads for the various types allocate a new byte array, and that's highly undesirable, at least for Riptide's use case.

[@RealSocket]

can you please do a tutorial on how to host the game servers on cloud (eg google cloud or aws)

[@tomweiland]

Unlikely, as I haven't done that myself either.

[@anzlcdev]

How can I then implement server rollback for server to see players position at a given tick?

[@tomweiland]

Track positions by tick (for the last x ticks) so you can revert them given a tick value in the acceptable range.

[@crazyunitylaboratory1607]

Cool !

[@tomweiland]

Thanks!

[@thejacraft1]

Can you make an tutoreal for Client side Prediktion and Server reconciliation

[@tomweiland]

At this point I don't plan to make any more tutorials. Client prediction is also not a simple thing, and it tends to rely on a number of other systems that would need to be implemented first/alongside it, and realistically that would require a whole separate series which is simply not worth the time investment for me.

[@alcytte7006]

Hey Tom, I'm a beginner in multiplayer thing. So I would like to ask you a question. I'm planning on making a game which runs multiple game instances running at the same time. For example: Lets take Fall Guys game. In each match, 60 players can play. But there are many instances of the 60 players matches running at the same time. Can I, and if yes, how can I make run multiple instances of the game using Riptide Networking Solution? In these three tutorials, using your Riptide Solution, whenever a client runs/starts the game, he gets connected to one server and I don't think multiple instances logic is implemented here. For basic understanding, what I'm looking for is: When a players starts a game, he should be able to choose in which game-instance he wants to join. Each game instance can have 10 players. I guess such game-instance are known as Rooms in multiplayer theory. The same functiionality is seen in Among Us game. Can you please guide me on how to achieve that?

[@tomweiland]

_"Can I, and if yes, how can I make run multiple instances of the game using Riptide Networking Solution?"_ Yes. Doing so is just a matter of running the server application multiple times, although at scale/in production that's usually a bit more involved because you want to automate the process of starting up and shutting down servers as needed. In that context you'd want clients to connect to a main master server first instead of directly to a game server, and then the master server can tell the client which game server to connect to based on matchmaking criteria or a room ID that the player enters. If you want to display a browsable server list you'll need a way to store which servers are currently online and send that information to clients.

[@alcytte7006]

​@@tomweiland Thank you so much for the info. I now know that it can be done. But as I'm a beginner in this multiplayer thing, I don't know how to do although I know what to do. So is there any tutorials out in the Internet to help me get through this? Or if possible can you please make a tutorial to make the functionality. I think most of the devs would want that.

[@tomweiland]

_"So is there any tutorials out in the Internet to help me get through this?"_ Nope. Multiplayer is like the wild west of game dev-other than a few tutorials on the basics and articles about the theory behind more advanced concepts, you're basically on your own. You think about how you might approach a problem, and then you try it. If you can't do that, you're somewhat screwed :P You should also consider whether this is really something you need at this point. Have you already built a game that's fun and a master server/matchmaking system is the last thing you need to release it? Or are you jumping the gun and wanting to implement systems that you really don't need yet? Once you've spent time working with multiplayer by building a functional game, figuring out how to deal with multiple servers and stuff is much easier. _"Or if possible can you please make a tutorial to make the functionality"_ That's highly unlikely. Making tutorials is tedious, unexciting, and time consuming, and I really don't enjoy it. It's also not worth it, because the number of people _actually_ in need of this information is quite small. On top of all that, building some sort of one-size-fits all system for this kind of thing is somewhat impossible. So yeah, I won't be making tutorials on this any time soon.

[@user-wh9lz9tp3o]

wow, you made Riptide? is your multi networking module?

[@tomweiland]

Yes, I made Riptide. I'm not sure what you're trying to ask with "is your multi networking module?" though.

[@user-wh9lz9tp3o]

@@tomweiland ah, i try to enter same mean just for checking made riptide. sorry i am not good at english. haha. you are so cool. very good at programing. thank you

[@sametkoser4867]

hi as ı understand for message packets 1225 is the maximum size. is there any way to resize it?

[@tomweiland]

As of v2.0.0 you can change the Message.MaxPayloadSize, however I don't recommend doing this as it makes it more likely that packets will be lost and have to be resent to ensure delivery. Packets larger than the MTU are fragmented and if any fragment is dropped/lost, the whole packet is lost: en.wikipedia.org/wiki/Maximum_transmission_unit Assuming you're using Riptide to build a game (which is what it was primarily built for), you shouldn't ever really have to send so much data that you can't fit it into a single message.

[@sametkoser4867]

@@tomweiland thank you so much. I see what you mean. In another game project I saw that message packets was bigger and I thought it was okey. I will consider it😊

[@jjvs7102]

If u havent can u make a tutorial on how to make a game launcher like steams, epicgames, riot where u can buy people can buy games and then play them?

[@tomweiland]

I have a basic launcher tutorial, but it doesn't go into anything remotely advanced like payment processing, and I don't plan to expand on that video.

[@not-id]

Im searching for an funktion to get the ip address of an connected client, i want to get the ip for using this as an peer to peer network thairfor i need to can get ip on the server side, if not what do i need to chanche or where is the ip address stored in the code of Riptide

[@tomweiland]

If you're using v2.0.0, you can cast the client's Connection instance to a UdpConnection and then access its RemoteEndPoint field. Off the top of my head I can't remember how to do it with older versions, but you should update to v2.0.0 anyways if you haven't already.

[@not-id]

@@tomweiland Thanks, im using v2.0.0

[@surv1vor249]

When u gonna finish ur pirate game? Really want to play that

[@tomweiland]

Unfortunately I haven't had much time to work on it lately, so it's pretty much still in the state that I left in after the last devlog. I do want to get back to it, but I've got no idea when it'll be finished considering how large of a project it is...

[@rontheturtle4117]

thank you

[@tomweiland]

You're welcome :)

[@-._63]

hi Tom! what else can interpolation be used for?

[@tomweiland]

Anything that moves.

[@-._63]

@@tomweiland thank you for tutorials. Thats amazing!

[@thiagodasilvaandrade3974]

Hello, I cant put interpolation to work because of the error "transform.position assign attempt for 'Character' is not valid. Input position is { nan, -Infinity, nan}", I have tried a few things but it hasn't work, the game works, but it doesnt really make it smoothier. I am new in developing, so I dont know what I am doing wrongly. Can you help me, please?

[@tomweiland]

It's an issue with the way the interpolation is set up (it's an _extremely_ basic solution). Take a look at the issue on the sample FPS's GitHub repo (link in description).

[@crazyunitylaboratory1607]

You should continue the pirate game. Unless I am blind I still haven't seen the grappling hook thingy ma bobby.

[@tomweiland]

Yeah, I want to get back to that. It's been like 7 months since I've touched the project 😭

[@jacobwoodman4488]

after following this tutorial it seems like there are new issues with my game; the camera jitters rapidly on every resync (i assume that's what causes it), and I get an invalid assign attempt in the interpolator (transform.position = Vector3.LerpUnclamped(from.Position, to.Position, lerpAmount);) which seems to also be a result of the resync attempts, the input position on these errors is Infinity, NaN, Infinity, sometimes the infinites are negative. I'll try watching through again and see if I did anything wrong, otherwise I'd appreciate some help if anyone has seen and resolved this issue themselves before

[@tomweiland]

Yeah, there's a divide by zero issue that can happen which causes the input position errors, which in turn (I think) causes the jittering. You could get rid of the errors by forcing the _timeToReachTarget_ to always be greater than 0, but that's only fixing the symptom-I need to come back to this at some point and see if I can figure out why exactly that time value sometimes gets set to 0.

[@MorMoLoc]

i had the same problem, just change Fixed Timestamp for the client too. 01:20

[@jacobwoodman4488]

@@MorMoLoc Strange, I have the same issue even with both client and server using the same fixed timestep

[@AmleshKumar-zr4ht]

@Tom Weiland... With the help of this can we make communication between two individuals Avatar.

[@tomweiland]

You could use Riptide to send audio/video data, yes.

[@AmleshKumar-zr4ht]

@@tomweiland Thank you...have u made any tutorial for this video audio and video data

[@BluePhantomGames]

I have a question, Can we add room system in our own multiplayer solution? If yes how can we do it? Waiting for ur reply

[@tomweiland]

Yes, you can do that-Riptide gives you the tools to send & receive data, and you can use that do build whatever you need/want. That being said, a rooms system (if you want it to be scalable) will likely involve running multiple servers, each acting as its own room, and therefore it gets a bit more into the devops side of things. Look into stuff like Docker and Kubernetes, or use Riptide's Steam transport and take advantage of Steam's relay servers & lobby system. You can of course run multiple rooms from within the same server application (just start a new Riptide Server instance, and give each one its own physics scene), but this won't scale well as you'll obviously be limited to just a single machine.

[@BluePhantomGames]

@@tomweiland looks like I have to be careful with my multiplayer games

[@user-jo1cm5ew8d]

Amazing work! I have followed this video but I didn't put anything further from the last video except what you posted in this video. I could see in Server, it works fine but on Client side, it stops and teleports to the new position after Time Elapsed becomes 0. Also when I jump and at the same time the Client screen stops, I get an error "transform.position assign attempt for ... input position is (NaN, Infinity, NaN)" Is there a way to fix this?

[@tomweiland]

Are you sure your code is identical to mine? _timeElapsed_ hitting 0 shouldn't cause any problems... I think the NaN issue can occur when the tick value is corrected because it can result in the time to reach the target being 0, which then results in a division by 0.

[@user-jo1cm5ew8d]

@@tomweiland After adding the part about didTeleport, it works fine! thank you!

[@inevitable.3991]

@@user-jo1cm5ew8d How did you do it? Do you have teleporting in your game?

[@user-jo1cm5ew8d]

@@inevitable.3991 i just followed everything he did on video, even without the extra parts from 2. It works

[@inevitable.3991]

@@user-jo1cm5ew8d ok thank you.

[@sahhesyt]

I need to know: How can I do a matchmaking system, using this. Example: League of Legends´ matchmaking.

[@tomweiland]

Have a master server which clients connect to, and then that tells the clients which game server to connect to based on who you've matched them with.

[@markeur5854]

Is there going to be a part 4

[@tomweiland]

Unlikely-I don't enjoy making tutorials (it's mundane, tedious, and very time-consuming), and this series already covers what you need to be able to go off on your own. The other thing is that as I improve and update Riptide, video tutorials will become outdated with no way to properly update them, aside from deleting the old ones and uploading a new versions. Also, as series go on, less and less people watch the later parts. This video only has 13k views so far, whereas part 1 is at 78k. Continuing the series simply isn't worth the time it takes given the diminishing returns.

[@markeur5854]

@@tomweiland understandable

[@-._63]

Hi Tom. I have two servers. The first is for authorization, the second is the game (world). How can I make the game server receive user data (nickname, clan, etc.)?

[@tomweiland]

Retrieve the data you want from a database or wherever you're storing it. If that doesn't answer your question, I'm not sure I understand what you're asking...

[@-._63]

I have a "social server".(interacts with the database). the user connects to the "social server" and can get data about friends, daily rewards, clans, etc. There is also a matchmaking server. How can I make it so that the matchmaking server can get data about the user (nickname, clan, etc.). The social server also needs to know which specific matchmaking (they may be in different regions) server the client has connected to.

[@tomweiland]

Why don't you have the social server communicate with the matchmaking server then?

[@-._63]

@@tomweiland But as a matchmaking server can get the user ID. After connecting to the matchmaking server, the client must transmit the user ID?

[@setseretze3565]

what happens if ticks go beyond ushort max

[@tomweiland]

It'll wrap back around to zero.

[@AmleshKumar-zr4ht]

@Tom Weiland can we integrate this with any meeting api like Zoom ,team .

[@tomweiland]

Uh...what? None of this has anything to do with Zoom or other "meeting apis"...

[@AmleshKumar-zr4ht]

@@tomweiland that means we can do meeting in unity without adding third party api like Teams or zoom.

[@AmleshKumar-zr4ht]

@@tomweiland Can we create meeting room using unity exact like in metaverse means effect of Virtual Reality?

[@Arcade_Archie]

i wonder, why arent you using a shared project for all that duplicated code in the Server/Client projects(i.e the MessageId enums)?

[@tomweiland]

Because setting up shared code between Unity projects is really annoying (especially on video), and it's really only the enums that are identical.

[@f0kes32]

@@tomweiland unity git package + gut submodule. pretty easy to setup

[@tomweiland]

Right, but that's a bunch of extra steps to explain and record (all of which introduce more potential for people doing things wrong, getting unexpected errors, etc.), just to avoid copy/pasting like 15 lines once per tutorial. Not worth it in my opinion.

[@Arcade_Archie]

@@tomweiland 👍

[@Rsparing]

Could You show how to make it so that we could use google cloud to do this? It's free and it can help a lot!

[@tomweiland]

That's not something which is specific to Riptide (or even to Unity projects in general) and videos already exist on how to do it, so I likely won't be covering it.

[@danielhuang6668]

YESSSS

[@tomweiland]

Yesssss

[@adam-ke7nm]

i cant port forward becouse my internet provider... is there any way i could use it? (any site that can host it for me or something like that) it would be great if it was free. :/

[@tomweiland]

If you plan to release on Steam, they have free relay servers.

[@adam-ke7nm]

@@tomweiland Hey! thanks for the answer. i wasn't planning to release it on steam but it is my only option... I wasn't able to find any info about it can you provide me a link to it?

[@kleitondiones8967]

Hi, How to make a milisseconds count? (ms). Sorry from english, i'm brasiliam

[@tomweiland]

I'm not really sure what you mean...

[@kleitondiones8967]

@@tomweiland a connection latency display, the response time in between server and client, as in league of legends(ms)

[@tomweiland]

riptide.tomweiland.net/api/Riptide.Client.SmoothRTT.html

[@dr.albitros4242]

Well, it's kinda sad you stopped, at least for now with this tutorial, and that you did THAT much off camera

[@tomweiland]

Everything I did off camera would have been pretty much the same thing over and over again, at least from a networking perspective. You can poke through the code on GitHub to see how I did it, and you can watch through some of the tutorials in the old series if you want more of a step-by-step walkthrough of implementing some of those mechanics. Tutorials in a series also have diminishing returns-you can easily see how this video already has _significantly_ less views than parts 1 and 2, and that's not just because this one came out later. Less and less people watch the videos the further you go in a tutorial series, and it's already at the point where it's arguably not worth the time and effort anymore.

[@inevitable.3991]

I've implemented this in my game, and now the movement feels much smoother. But there is one problem, when moving and jumping at high speeds, the game lags and freezes. What do you think causes this?

[@tomweiland]

No clue. Are you getting any errors? If not, there's not much to go off of...

[@inevitable.3991]

@@tomweiland Here is it: "transform.position assign attempt for 'Character' is not valid. Input position is { Infinity, -Infinity, -Infinity }."

[@tomweiland]

Join the Discord server and ask there-troubleshooting in the comments is a pain.

[@inevitable.3991]

@@tomweiland Ok sure

[@user-vb3bt1kd3u]

With these three tutorials, can I create my multiplayer game?

[@tomweiland]

Yes.

[@ParkerGameDev]

the comments never end !

[@tomweiland]

Or do they 🤔

[@ParkerGameDev]

@@tomweiland we ll just have to wait and see for our selfs :P

[@yuvrajdarshankar7121]

How can i run multiplayer in webGL?

[@tomweiland]

You'll need to use websockets-Riptide currently doesn't support browsers.

[@user-emxtgxl]

Please help me, sorry my english is so bad bud I need help witch NetworkManager I want a computer from another network to be able to connect, you could help me

[@tomweiland]

Google "how to portforward" for you router model.

[@holdenthompson1449]

Anyone try to do this with the Player Hosted Steam Transport? I tried but I got a Message handler error and a 0 bytes received for float value error. Client play just won't move now

[@tomweiland]

Join the Discord server and ask there (and include the full error as well as the code causing it).

[@holdenthompson1449]

@@tomweiland Okay, I posted in Riptide - Help

[@MegaXDbr]

@@tomweilandno

[@ahmadrazek377]

pls Make a Tutorial in TCP about Interpolation Thanks!

[@tomweiland]

What do you mean? TCP has nothing to do with interpolation...

[@ahmadrazek377]

I mean On your TCP Multiplayer Tutorials Playlist

[@SDMagicvines]

Can i send image to server?

[@tomweiland]

Yeah, you just need to convert it to bytes.

[@SDMagicvines]

Thank you for your reply but when I send image to server it shows "message has insufficient remaining capacity (1245) to add byte[]"

[@tomweiland]

Yeah you'll need to split it up into several messages and reassemble it on the other end. Either that, or wait for v2.0.0 to come out as that will include the ability to change the max message size.

[@parnmusera2447]

Can someone tell me how to create script for disconnect button ?

[@tomweiland]

Just call the client's Disconnect method when the button is pressed.

[@parnmusera2447]

@@tomweiland Oh, I forget to destroy player after Disconnect. Thank for your help.

[@parnmusera2447]

@@tomweiland Can I make a script for check game version? If I want to update game in future.

[@kingofmatrixletsplayer2863]

May I ask, why this one line "if ((to.Position - previous.Position).sqrMagnitude < squareMovementThreshold)" ? What it does, why it is needed? Thanks

[@tomweiland]

Pretty sure I explained that one in the video-it determines whether the object's position should be changing based on how close the last 2 position updates were to each other.

[@Cavlar69]

I'm having trouble getting it to work on 2 different devices on the same network. I set the IP to the host computer's IP, and it doesn't work. Any tips?

[@tomweiland]

_"I set the IP to the host computer's IP"_ Normally that should do the trick, as long as the port is the same and no firewall stuff is blocking the connection. If you need help troubleshooting though, I'd recommend joining the Discord server.

[@Cavlar69]

@@tomweiland Okay thanks, I’ll definitely join the Discord server. I don’t think it asked me to let it through the firewall when I first opened it so I’ll try doing that manually as well :)

[@Cavlar69]

@@tomweiland I got it working now - just had to build the server project lmao

[@tutacat]

Unity implements it's own tick system, you are just changing the code to use it.

[@tomweiland]

If you're referring to the FixedUpdate loop, that doesn't really provide enough control, especially for fast-paced multiplayer games which need to predict and then reconcile things (which involves executing the same ticks multiple times).

[@bonse2000]

next ep?:(

[@tomweiland]

There probably won't be one-I've already given you all the info you need to use Riptide to pretty much build whatever you want. Making tutorials is also tedious and unexciting, and with a series like this, less and less people end up watching the later videos, so it doesn't really feel like it'd be worth it.

[@mouaad_games8]

Please make uploading videos faster I want to finish the serie

[@tomweiland]

The series pretty much _is_ finished. I _might_ add to it in the future (although I really don't enjoy making tutorials) with some stuff about more advanced topics, but this is it for now-I've given you the tools you need to make your game in these first 3 videos.

[@christophermc2]

So I guess you gave up on the pirate game?

[@tomweiland]

No, I want to get back to it, but between contract work and working on Riptide I just haven't had (and basically still don't have) much time left over :/

[@numerotinko]

P gun. yeah.

[@tomweiland]

P gun?

[@TETE]

Exception: Client-side message handler methods 'Player.SpawnPlayer' and 'NetworkManager.Sync' are both set to handle messages with ID 1! Only one handler method is allowed per message ID! RiptideNetworking.Client.CreateMessageHandlersDictionary (System.Reflection.Assembly assembly, System.Byte messageHandlerGroupId) (at :0) RiptideNetworking.Client.Connect (System.String hostAddress, System.Byte messageHandlerGroupId, RiptideNetworking.Message message) (at :0) NetworkManager.Connect () (at Assets/Scripts/Multiplayer/NetworkManager.cs:96) UiManager.ConnectClicked () (at Assets/Scripts/Multiplayer/UiManager.cs:36) UnityEngine.Events.InvokableCall.Invoke () (at :0) UnityEngine.Events.UnityEvent.Invoke () (at :0) UnityEngine.UI.Button.Press () (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/UI/Core/Button.cs:70) UnityEngine.UI.Button.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/UI/Core/Button.cs:114) UnityEngine.EventSystems.ExecuteEvents.Execute (UnityEngine.EventSystems.IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/ExecuteEvents.cs:57) UnityEngine.EventSystems.ExecuteEvents.Execute[T] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.ExecuteEvents+EventFunction`1[T1] functor) (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/ExecuteEvents.cs:272) UnityEngine.EventSystems.EventSystem:Update() (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/EventSystem.cs:501)

[@tomweiland]

Sounds like you have 2 message handler methods that are set to handle messages with the same ID...

[@taehee348]

@@tomweiland hello, I am also having this similar issue and I am not exactly sure how to fix this.. Would greatly appreciate help on this. Thanks!

[@tomweiland]

@@taehee348 as the error indicates, you are apparently giving the same message ID to multiple MessageHandler attributes. That's not allowed, and to fix it, you need to not do that 😅