archived-code-advanced

[lament salmon]

yeah to my understanding this is the go-to resolution

[iron urchin]

So, in essence, it’s an engine limitation?

[frozen badger]

Yeah but I dunno about the 16k x 16k figure, I feel like a lot of games have more

[lament salmon]

as to storing the map, you could store it in chunks all in their local space, but with a world offset

[compact ingot]

its a limitation of digital computers

[iron urchin]

Well 16 K is arbitrary without defining a unit of measurement, and a scale. Right?

[compact ingot]

well, they dont

[compact ingot]

human scale

[lament salmon]

so meters

[frozen badger]

The example of minecraft which has like, 60 milllion in diameter plus a z axis of like 255

[compact ingot]

those that do, use a floating origin but that is super annoying to deal with

[iron urchin]

I mean within the virtual world. Defining what 1 m is on the screen.

[frozen badger]

I feel like if one dude in his basement can make a world that big that works it's not that hard of a limit

[compact ingot]

it doesnt really matter how big 1 unit is

[frozen badger]

Yeah it's more the number of units

[lament salmon]

its still taking the range of 1 from that float

[frozen badger]

Terraria has like, 17000 x 5000 or something?

[compact ingot]

1 unit in a game is usually what 1m would be to a human, maybe 1 foot

its not a hard cutoff

but just for giggles, make a unit sphere in unity and move it to like 16000, 0, 0

[frozen badger]

Ah, nevermind apparently it's 88920 x 64600

[compact ingot]

and you will start to see glitches in the mesh

[compact ingot]

certainly using floating origin

[lament salmon]

if you fall thru your map, and wait for a bit, your character might start to deform

this was trippy when i didnt know the concept of floating point imprecision

[frozen badger]

But... I worked on a pretty big survival game in unreal, and our world was like 400k x 400k

we had no floating origin as it was multiplayer and your position would just be shown as like, x 120 000

[compact ingot]

is unreal 64 bit?

[frozen badger]

Doesn't that depend on the build? Anyway here is a ball at 45k in unity

[compact ingot]

you need to move it to see it

[frozen badger]

I did

if I bring it up to 150k unity warns me that bad things may happen

[iron urchin]

According to Google

[frozen badger]

Ball does get a bit wonky at 75k

30kx, 30ky is fine though.

[compact ingot]

actually you can see it without moving this is at 16k

[compact ingot]

doesnt mean the coordinate system uses 64 bit

unity is a 64 bit app too, but all the graphics are 32 bit

[iron urchin]

Oh, I see.

[compact ingot]

furthemore the display quality isnt even the problem, its just that all your math gets progressively more wonky beyond 8k

integration errors accumulate much more quickly and comparisons will fall out of range

[frozen badger]

Well yeah, comparing floats to each other won't work very well

but then, shouldn't do that in the first place

[compact ingot]

duh

but if you compare ranges, i.e. your approximately function with a custom epsilon

those ranges might not work for large values

because values are spread further apart than your epsilon

[iron urchin]

As far as I just read, UE5 now handles double precision coordinate systems.

[compact ingot]

anyway, make a game keep everything within 8k from the origin and you're fine

[compact ingot]

so we will get even bigger, more empty maps now 😄

iirc UE5 will also do floating origin automatically (as part of the world streaming)

[frozen badger]

In our case our physics started going wonky after numbers reached 800k

wouldn't floating origin mean physics wouldn't go wonky ever?

[iron urchin]

Funny enough, this is exactly tied to the reason I started inquiring in this channel. I want to understand the limitations to filling that emptiness with digital psuedo-life and let the player discover it. With the advancements of a.i. in games (like ML Agents) can’t the world be alive and ever changing without the players input?

[frozen badger]

I mean it could anyway

[compact ingot]

AI and procgen will only ever produce self similar environments

[frozen badger]

don't need machine learning for it

[compact ingot]

you can get away with it to some extent but an engaging environment will always have to be handcrafted

[frozen badger]

Machine learning is like a hammer and every programmer that touches it goes around seeing nails everywhere

[compact ingot]

ML wont solve the lack of creativity problem

[frozen badger]

The original Ultima Online actually had this

[compact ingot]

you can see that with Midjourney/Dall-E, those images are not capable of the same expressiveness as a handcrafted image and to a trained artist they look outright bad

[frozen badger]

which is a 1997 MMO

[iron urchin]

What I imagine is the rules of the world are handcrafted, the world itself is procedurally generated, and the player and non-player entities in it interacts and exist together and independently of one another.

[frozen badger]

It doesn't really sound concrete

[compact ingot]

you are imagining the perfect game that has been on the "want to make" list of every gamedev since 1985

such a game will never exist

[iron urchin]

I have a much more fleshed out idea, something I’ve been working on on the side for the past 15 years. However, I feel that we’ve gotten to a point where technology is actually caught up with our imaginations for what games can be.

[frozen badger]

yeah man I had this dream of making a game where the whole world was simulated like skyrim and characters would go around eating and sleeping and talking to eachother kilometers from the player

I felt that way 10 years ago

[compact ingot]

no

[iron urchin]

Short and sweet lol

[frozen badger]

Still though, gotta warn ya, we all have that same exact idea

[compact ingot]

all modern tech in games is focusing on compressing the simulation more and more to the point where only the visible pixels are simulated

this is where ML is heading to

[frozen badger]

ML dialogue in games could be fun though

[compact ingot]

ML dialogue would be meaningless

[iron urchin]

I didn’t mean specifically dependent on machine learning. That just being one of the many expansions of the tools developers have. Compared to 20 years ago.

[compact ingot]

why would you care about dialogue that is inventend on the spot with no relation to any other systems in the game

[frozen badger]

Nah I mean, google had that one programmer that went nuts and started believing their text generator had become sentient right?

What you never wanted to just, hang out and talk with your crewmates in mass effect

[iron urchin]

I’m gonna have to look that up.

[compact ingot]

ML can interpolate

thats all its good for

if you interpolate too much, you get ugly artefacts

[frozen badger]

Yeah, sure. It's not great. But it's a step up from npc repeating dialogue

[compact ingot]

superficial improvement really

[frozen badger]

Still, If it can trick that google engineer into losing his job over it

I'm sure you can trick the people that marry hatsune miku into enjoying it too

[compact ingot]

we're already tricked into believing all sorts of crap that came out of ML and not a human brain

everything you watch on YT is brainwashing driven by an AI

[frozen badger]

AI tricked me into watching WIDE PUTIN 10 HOURS meme

[iron urchin]

To go back to the skyrim example, I think questing/Npcs controlled by aspects of ML and Neural networks could help to create a very unique and meaningful experience for gamers. If Npcs behaved based on weighted needs driven systems, you can create unique worlds and ecosystems with problems that need unscripted solutions.

[frozen badger]

Why do you think machine learning will help you in this case?

Why not just use, say, utility AI

[iron urchin]

You can hardcode things like movement and interaction, and let a reward/punishment ML system govern the actions and evolution of the entity behavior.

[frozen badger]

Yeah but why do you think that would be engaging to interact with?

[compact ingot]

but you do not specify at all what ML contributes to that

[frozen badger]

not to mention, how do you define "good" or "bad" for the ML?

[compact ingot]

and what data would you use to train it in the first place

[frozen badger]

is it good for the AI to stand in a corner all day, wait for the exact moment it needs "food" and then go "eat"?

Nearly every good machine learning project has a very simple "win" or "lose" condition, and the reason certain machine learning algorithms exploded in skill recently is that people managed to clearly define "win" conditions for them

AI is now able to kinda draw art because someone coupled it up with AI that tries to guess which picture is a picture of something that fits the description.

[iron urchin]

That’s where the programmers ingenuity and creativity come into play in defining tue rules of the world. What makes something good or bad for a human? or good for one person and bad for another. The framework for the digital existence has to be specified, but the uniqueness of the “life” the entity lives out and how that effects the digital world, in unscripted ways, is where the intrigue grows from.

What if every time you played Skyrim, the rules were the same but the experience was completely unique?

[frozen badger]

And when you have made all this right, you've made all these rules for how important it is to run out of your house when its on fire vs how important it is to eat when you're hungry

you've made Utility AI

and don't need the machine learning at all

and Utility AI has the thing you want anyway, just look at something like dwarf fortress or rimworld

or heck, the sims even

[iron urchin]

There are tons of tutorials on YouTube from complete beginner to extremely advanced.

[frozen badger]

Maybe we can help if you have a precise question

[iron urchin]

To slide back to the discussion at hand, I feel that utility AI is just limited to the possible decisions that are hard coded in, while with machine learning you can get to a point where the entity is using input data to create its own possible decisions.

[sly grove]

#🤖┃ai-navigation

[frozen badger]

That is a common misconception

It's like thinking text generator AI will come up with its own letters

There have been examples of AI playing games really well and coming up with strategies that humans never knew about

but still entirely within the options coded by the player

[iron urchin]

Right. And if the entity can learn to access code that was not inherently accessible to it, you can create unique situations.

[frozen badger]

What do you mean learn to access code

It's not magic, it gets segfaulted by the OS just like any other program

It's like saying if we give dall-e 2 another 500 billion images it's gonna learn to reach out from the computer screen and grab a brush and paint in real life

It just seems entirely disjointed from what machine learning is actually capable of, or even good at

[iron urchin]

let me try to give a practical example. Imagine a child that sticks a fork in a light socket. That child is going to get a zap, and it’s not going to feel good. depending on how intelligent and perceptive the child is, the child may or may not ever do that again. That we have a learned behavior through a reward and punishment system.

if I replicated that whole scenario digitally, I could use utility AI to specify that if the child puts the fork in the socket the data that it collects will tell it that that was bad and to not do that again.
however through machine learning the entity would collect data and then make its own decision from the decisions available to it.

that’s the difference to my understanding, and I think one of those lends itself a lot easier to vastly unique and varying situations.

[frozen badger]

The issue is that, through defining all these rules for what is "good" or "bad" you really just end up with utility AI and there is no value added from "machine learning" it

you say it'll be more dynamic if the AI figures it out for itself but really all it figures out is how to follow the rules you've set out

which, you could just tell it to do

[iron urchin]

Then every entity would react the same to every stimuli. If you vary the weight of the stimuli for each individual entity then outcomes won’t be repetitious

[frozen badger]

That is also true for machine learning

every entity would react the same to the exact same stimuli

[iron urchin]

Not if the weights aren’t the same though.

[frozen badger]

So what, each individual character has their own neural net?

it's not "one" machine learning it's one per person?

In normal AI this is solved by just, giving characters traits that cannot be shared. Or indeed by them not ever receiving the exact same stimuli

[iron urchin]

I suppose so. To go back to a cruel perversion of the child getting shocked example. What say you have two children and one is a masochist. The masochist would then continue to zap itself, possibly until death, because it drives pleasure from the pain.

[frozen badger]

Right but that is already doable

no machine learning required

dwarf fortress does stuff like this all the time

[iron urchin]

I’ve heard of that game, but I’ve never looked into it. Perhaps I will now.

[frozen badger]

a third of my soldiers are too cowardly to fight for me and run away from danger, or my best smith goes berserk because he doesn't get to work with the materials he wants

[iron urchin]

So the AI gains traits that begin to form their personality and influence their decisions and reactions?

[rugged radish]

machine learning is perfect for situations when you have a lot of data, and want to turn it into behaviors
if you have nothing, you yourself will end up being the source of data, and you will drive the network to learn the things you want it to learn
which only adds a lot of overhead and work and gives the same result as just writing code

[frozen badger]

Yeah. Like you have clearly defined outcomes and good/bad states, and data you can easily curate

like you could probably use machine learning to make a bot that fakes being a player in an MMO

[iron urchin]

What do you mean by fakes being a player?

[frozen badger]

Like, you already have player data for a hundred thousand players right?

So you make one AI that tries to separate bot players from real players, and one AI that tries to behave like a player

[iron urchin]

So basically how a chess computer works?

[compact ingot]

the state space of a MMO is way too large for an AI to learn it

[iron urchin]

I guess a Chess trainer to be more accurate

[frozen badger]

I would have agreed with you, but it doesn't have to be "good" right, it just has to behave like a player

it could stand in the auction house half the day

and that would be "like a player"

[compact ingot]

the best use case for AI so far is upscaling coarse data of any kind

its basically all that these fancy AIs from DLSS to Midjourney to Copilot do

[frozen badger]

I mean the best go player in the world is an AI right

self taught

[compact ingot]

in theory you could define A over here on the left and B over there on the right and have a NN that was trained on basically everything and it would invent a random permutation of the world constrained by A and B

[frozen badger]

created its own data

[compact ingot]

self taught by knowing the win condition of the game, not really self taught

[frozen badger]

I mean, that is also the only thing it was taught

"did you win" or "did you not"

[compact ingot]

yes, but that is a classifier

[frozen badger]

it wasn't taught the win condition it was just told if it won or not

[compact ingot]

it did not come up with the idea of winning

which is the whole point of creativity

[frozen badger]

I mean yeah but you said the best use case for AI was upscaling data

I am saying there was no upscaled data here

it solved a problem better than humans did

[compact ingot]

it constantly interpolates data

thats how it works

[frozen badger]

data it itself provided

as opposed to AI trained on human data

[compact ingot]

it interpolates between winning and loosing and invents a game inbetween

[rugged radish]

you also need access to resources google has to make something close

[compact ingot]

don't get confused by the convolutions inside the interpolation, the rules are the A and B

[rugged radish]

it will take forever to train it on consumer hardware

realistically you need a good dataset, most likely marked

[iron urchin]

so what is the true bottleneck that is stifling innovation in the video game industry? Is it really just lack of creativity on behalf of developers?

Or perhaps that just boils down to aversion to risk…

Game companies, at least the major ones, will only focus on products that have made money in the past…

[sly grove]

I'm a capitalist, but the bottleneck is capitalism. It rewards terrible games with profitable monetization strategies (skinner boxes), disincentivizes risk taking.

[iron urchin]

Great point. It’s as if games have become little businesses, as opposed to products businesses create.

Micro transactions have truly become the thorn in the side of the industry. At least, in relation to consumer satisfaction.

seems to me that most of this money is made off of trying to give players a pseudo-unique experience. Leveraging that inate desire in people to tell their own story, in a legitimate, non-faux way, would be a gold mine.

I’ve definitely driven this far off the subject of coding, so I’ll leave you all be. But I appreciate you all humoring me, and sharing your knowledge.

[mortal orchid]

When Many enemies come to attack the player and when they collide with each other they go into this kind of drizziness state. I am using Aaron's A* package.

Here is the code

https://pastebin.com/vSXh8dQ2

[uneven ocean]

I haven't looked at your code, but my first guess is that as soon as they don't move they face toward the camera. They alternate between not moving and being able to go a pixel toward you, so they snap back and forth between these two states.

[mortal orchid]

Yes, actually the animations are flickering. Initially, I passed the directions to the animations of the enemy but they were flickering all the time then I used the smoothed velocity to tackle this problem and it worked but when they came at the same time and collided it started to flicker again.

[uneven ocean]

Well yeah the smoothed velocity would help if they were stopping for a short time to hold the animation state for longer

What you could do is to ignore the idle state

Set it up in a way that makes it so that it maintains the last state (left / right) until it switches to the other side, or maybe if you have a face for walking up and down too

If they walk left and stop walking left they shouldnt switch to the front facing posiiton

Only if they start walking in ANOTHER direction should they change their sprite

[mortal orchid]

There is no idle state there are just horizontal and vertical blend animations.

It is flicker between horizontal and vertical movement basically

[undone coral]

i forget, is it possible to translate the physics world bounds and resolve this issue?

[compact ingot]

no, you'd have to move the stuff in the scene so player and stuff are closer to the origin

[midnight venture]

I don’t think creativity of the old days has really gone anywhere. Indie and ”AA-indie” are at least as willing to try something different as AAA of 90s was and the budgets are comparable (not to mention you often can do more with similar value adjusted budget)

[bronze geyser]

Is there a CPU effecient way to track whether or not a new GameObject had become active this frame? (And to get a reference to said gameobject)

[compact ingot]

You could make a component that on enable fires a static event with the reference. Put that on all objects you want to track.

[bronze geyser]

Doesn't quite work here. I'm doing this for a modding project, so I would largely need be able to do this purely through runtime logic.

I don't suppose there's any way to hook into the GameObject lifecycle

[compact ingot]

Not from the outside

[undone coral]

you can check every frame and compare to the previous one

don't overthink it. it isn't cpu heavy

you're modding my bro. it do not matter

[fathom rover]

is it okay to ask about modding related things here?

[balmy cargo]

anyone knows how to fix this ?

i just have a start function with this line
DatabaseReference reference = FirebaseDatabase.DefaultInstance.RootReference;

[fathom rover]

because my unity is crashing trying to add a MonoBehavior to a GameObject at runtime on Linux 😭

[lament salmon]

did you do what the error suggests?

[balmy cargo]

yeah

[bronze geyser]

I mean I imagine doing a FindAll for gameobjects 60 times a second is a bit much

That being said, I would probably reduce the call down to like every 6 frames

Frame perfect percision isn't required, but I largely just need to know when certain GameObjects have become active

[midnight venture]

Does the game spawn more of those game objects? If not, you should just cache game object references

And then GameObject.activeInHierarchy can be used to check if the object is active

[digital helm]

Is it possible to calculate childs world rotation from local rotation?

Well i'm sure it is, but does anyone have an idea how

[upbeat path]

no need to calculate it a GameObject contains both

[digital helm]

Yeah but

I have localRotation values

I wanna calculate into world rotation values

[devout hare]

That makes no sense, just get the world rotation directly

If for some bizarre reason you only have local rotations all the way down, you have to add them together until you get to the root object

or multiplying if they're quaternions

[digital helm]

Okay basically what I'm trying to do is

Apply babylonjs's camera rotation values into unity

but because it's a different coordinate system the values aren't correct ofcourse

any advice how to convert?

[devout hare]

so actually nothing to do with world/local rotation then

first figure out what coordinate system BabylonJS uses, then find out how to convert between those two systems

here's an example for Blender -> Unity: https://forum.unity.com/threads/converting-positions-and-rotations-from-blender-within-an-internal-tool.1092433/#post-7046887

[digital helm]

It uses right handed y up

[blissful bay]

Hi, this is a very specific issue, but I hope there is a solution... is there a way to start a coroutine defined in class A from class B and run it in a separate thread?

[compact ingot]

no, if you want to use threads, use Tasks or Jobs

[blissful bay]

Well, that was fast

[upbeat path]

The Coroutine will always run on the main thread but I suppose it would be possible to start a new thread from within the coroutine to do the actual processing

[blissful bay]

that would be great

[upbeat path]

becarefull though because most Unity API calls will only run on the main thread

[blissful bay]

to elaborate on the issue - I have a very demanding task that needs to be on a separate thread, but the class that has all the needed logic musnt be monobehaviour

and it appears to me that

sendThread = new Thread(() => SendFrame());

a wording like this simply doesnt cycle as it should

[upbeat path]

Something like this should work

    IEnumerator StartThread()
    {
        ThreadStart newTh = new ThreadStart(myMethod);
        Thread th = new Thread(newTh);
        th.Priority = System.Threading.ThreadPriority.AboveNormal;
        th.Start();
        yield return new WaitUntil(() => !th.IsAlive);
    }

    void myMethod()
    {

    }

[soft ginkgo]

Hello, anyone here who have samples/references on how to use unity authenticate with Google play games?

Tried my best following the manual but still stuck for like a month now

[blissful bay]

Thanks, will try to make it work

[pliant crest]

one way is use ECS

other ways depends on what you are trying to do

with that singleton

[brisk pasture]

feel its too generic of a question, like without more details all i would say is remove the static stuff from it, and and stuff enforcing one instance, then simply pass it to things that depend on it instead

[tidal maple]

i have a Managed Dll and i should be able to access it, but unity says it can't find it at runtime

[fickle obsidian]

@regal olive I’m working through something similar and I find that the only option that I’ve found to work so far for me is implementing an observer pattern to handle manager-like communication between classes. You’re asking the right questions imo, as we all usually seem to agree that singletons are sometimes the right fit.

However, in the community of Unity it’s very rare that folks get into a robust/scalable implementation of other patterns as I believe most folks who can actually utilize these patterns do know how to implement them from a high level conversation, while others looking to “get there” are sort of left with a half measure.

[pliant crest]

i literally just pass the reference of the "manager" class to whatever needs it

when its instantiated

or assign it in the inspector before hand

if it already exists in the scene

[dawn haven]

Hi, I want to get the percentage of color in my render texture for each color (as an example to know how many % of blue there are), how can I do that?

(I would like to retrieve this value as a float variable)

[sly grove]

wdym by "each color"?

how would you classify a given pixel as a color?

there's like 32 million possible colors for each pixel right?

[dawn haven]

basically I need to know if there is more orange or blue in my scene and for that I use this material:

[sly grove]

you'll need to classify each pixel as being "orange" or "blue", probably by converting the RGB to HSV and bucketing the hue

[dawn haven]

(not really in the whole scene but only for the inked surface so I can use a tag on the materials concerned)

I have to do that with the render texture or the materials?

[sly grove]

wait you're talking about scoring for a splatoon like game right?

Is this like a game jam people are doing? THere's been like 5 people asking about this lately

[dawn haven]

exactly

[sly grove]

you need to just do that analysis on the splatmap texture or whatever you're using for painting

[dawn haven]

oh

nope

[sly grove]

Oh wait duh I know why, it's because Splatoon 3 just came out recently.

[dawn haven]

probably i guess

[humble leaf]

I guess Splatoon will become the new Backrooms like Dani-Grappling-Gun-Mechanic before it. 😆

[sly grove]

Seems like the shader you're using doesn't have a texture called "Mask"

[dawn haven]

Does GetTexture work with Texture2D?

[sage radish]

It's not guaranteed to be a Texture2D. It could be a RenderTexture too.

Otherwise it would just return Texture2D

[sly grove]

Double click that Mask one

I think the actual name might be different?

[jolly token]

See the properties of it

[dawn haven]

How can I do this? I don't understand what this mean

[jolly token]

Reference name can be different

Just click it ig

[dawn haven]

_MaskTexture

ok i think i can use this

[jolly token]

Yeah that

[sly grove]

yep that'll be the one you use in code

[undone coral]

you're at the start of a long journey

when the players run around and paint the ground, a piece of code does that right?

so you already know exactly when paint is added and removed

count there

you don't have to interact with the texture at all

splatfest... they probably have a little tutorial on this yeah?

[dawn haven]

I found how to do it but I just need to know how to convert a texture to a 2D texture ("as texture2D" doesn't work)

splatfest?

[undone coral]

what is your objective?

[undone coral]

hmm

i'm describing another approach

do you know where the code is that paints the ground?

[undone coral]

this is an xyproblem

you already know how much paint was added or replaced, it's in the code that paints the ground

did you find it?

[undone coral]

what's your objective? what is the code trying to do?

[dawn haven]

I know what you want to do but that would mean I have to know when the blue player is painting on orange paint to know when to take points off the orange player

[undone coral]

have you looked at the code?

it sounds like you did not author it

are you using an asset?

it is okay. you should read it

it is going to illuminate for you how it works

[undone coral]

you can use the exact approach of counting the pixels, pixel by pixel

[dawn haven]

I added the multiplayer myself so the code doesn't expect there to be two different colors on the ground, that's why I can't tell when the blue ink covers the orange ink

[undone coral]

i don't really know why you're being stubborn about this

you know when you draw on the texture. it is writeable and readable there.

you have to look at the code

[undone coral]

that's why I can't tell when the blue ink covers the orange ink

?

[undone coral]

you also have a reference to the texture elsewhere

it's in the code. you have to read the code!!

[blissful bay]

I need a loop that sends some data, enclosed in a internal class, so that I can "hide" it inside a library. Since the class is internal, it cannot inherit from monobehaviour, thus no update and no StartCoroutine

[undone coral]

@blissful bay if you use the code snippet that was shared with you as is, it is going to crash your editor

[blissful bay]

And the task is demanding, so I need to have it in a separate thread

[undone coral]

what does the code do?

what is the task?

you're authoring a library for someone else? or what is the idea?

[blissful bay]

Yes

[undone coral]

so what is thea pplication / game?

succinctly

this matters a lot

[blissful bay]

Reading camera output, chunking it up into packets and sending them to a remote java application

[undone coral]

okay

camera output? you mean a unity camera right?

[blissful bay]

I have a non-DLL version working, I have a DLL non-threaded version working, but I cannot combine then

[undone coral]

as in a Camera, not the webcam right?

[blissful bay]

Ye, sorry

[undone coral]

and the point of this is to show the unity camera feed in a web page? or what are you doing with it in the java application

[blissful bay]

Not necessarily a web page, an application

[undone coral]

instead of my guessing

like what is thea pplication? you've almost helped me understand

[dawn haven]

this is what paints the ground, I don't know how to tell if you are painting on a blank surface or if you are painting on a surface that has already been covered by enemy ink

[undone coral]

i make a unity streaming technology, i probably know more about this than anyone. i'm asking a really basic question

there isn't anything sensitive about what the application is

[blissful bay]

tbf Im not familiar with the other end of the app, I have the java script that recieves the data and converts it back to JPEGs, which are then displayed on an android app, but I havent really digged into it

[undone coral]

hmm

i'm asking what is the application, not the Application

if that makes sense

"i am making a basketball game that streams a camera to a remote android phone because the gameplay is XXX"

[blissful bay]

oh

[undone coral]

you've achieved a lot so far based on you've been writing in the chat for a while

i mean in the search results

[blissful bay]

Im making VR educational software and I want to stream what the teacher to see what the students are doing etc

[undone coral]

like i'm asking you Why you need this, not why you need this.

OKAY

THANK YOU

[blissful bay]

lmao

[undone coral]

it took 10 minutes to get to that

[blissful bay]

sorry for me being a lil dumb

[undone coral]

are you a student?

[blissful bay]

ye

[undone coral]

okay

[blissful bay]

honestly really new to all this "backend" stuff, I mostly do the gameplay logic

[undone coral]

how much time do you have

to work on this? is there a deadline?

[blissful bay]

not a hard one, why?

[undone coral]

you're on the start of a very long journey

[blissful bay]

even if I have the working scripts up and going?

I just need the one last step

[undone coral]

the problem is just way harder than you've discovered

i'm also familiar with how students use the word "just" and "working" lol

for example, punch the three words i just need into the search

[blissful bay]

understandable, lmao

[undone coral]

to see where you are in this journey

from the outside

this is a pretty good illustration

do you see what i mean?

[blissful bay]

I do

[undone coral]

so

[blissful bay]

so, how much difficulty does the threading add to the task?

[undone coral]

when you want to send the rendered output of a video game over the network, the image graphics transit over a lot of different boundaries that have very strict rules - the gpu, the unity render thread, the unity main thread, the api to the network stack...

trying to do this in real time is extremely hard. it isn't possible to do in unity on the oculus without a native android plugin yet, for example

for the application you're talking about, the best thing to do will be:

[blissful bay]

could you elaborate on "without a native android plugin"?

there is obviously something I am missing and I am well aware of it, and regarding my current main-thread version working - I am getting the input back just fine

[dawn haven]

I managed for a while to add points to the player when he paints but how do I know if he paints on his own ink (this is to prevent the player from accumulating points by re-painting on his own ink)

[undone coral]

public class SendView : MonoBehaviour
{
 string playerId;
 void Start()
 {
  StartCoroutine(Loop());
 }
 IEnumerator Loop() {
  while (Application.isRunning) {
   yield return new WaitForSeconds(1f);
   yield return new WaitForEndOfFrame();
   ScreenCapture.CaptureScreenshot("temp.png");
   var form = new WWWForm();
   var data = new MultipartFormFileSection(File.ReadAllBytes("temp.png"), "1.png")
   form.Add(data);
   var www = UnityWebRequest.Post($"http://server:8000/imagefor/{playerId}", form);
   yield return www.SendWebRequest();
  }
 }
}

this is probably your best bet

is this already similar to what you're doing?

@blissful bay

[blissful bay]

Waaay off

[undone coral]

the reason i'm suggesting this is

you can't send the graphics off the device in real time with low latency

not without writing something that is going to take you 6-12mo of full time work to achieve

even with high latency, it is going to take you a really long time. i would still say at least 3mo

based on what you know today

[blissful bay]

Which part are interested in, the sender itself, or the camera capture?

[undone coral]

so in this code, we're taking a screenshot every second

and uploading it to a remote server using a simple http post

[blissful bay]

I'm looking at at least 25 FPS

[undone coral]

that remote server can be a standards based one

[blissful bay]

Ideally 60

[undone coral]

this is beyond your abilities

i mean, you can get there eventually. you would first have to scrap pretty much everything you already have

[blissful bay]

The script I already have already works in production tho

[undone coral]

you can certainly try recording pieces of video, for which there are plugins, then uploading those pieces. the video feed will be 5-10s delayed

[undone coral]

why are you saying stuff like this

[blissful bay]

Because

[undone coral]

lol

[blissful bay]

It is the truth

[undone coral]

i'm just teasing

c'mon

you don't comprehend yet that the multithreading isn't going to improve performance.

you don't really know what the problem is yet

i actually started writing what it was, and you asked no follow up questions about it

you're still convinced that if you "just" could get htis thread working

or whatever

[blissful bay]

Wait, let's get one thing straight, as I think we are missing the point

What do you think is the issue I have

[undone coral]

you don't know yet it will instantly give you errors

i think you have a 3d rendered game on a Quest device

and when you turn your image sending code "on" the game runs very slowly

and you've been working on trying to make this faster

you may have given it to someone else to use

and they got a headache

because it isn't running at 90fps

there might be a lot of stuttering too

75fps or 90fps... it might be running too slow

you might have an empty scene

and this is "working"

and maybe you tried the "library" in the "real" game and now you've discovered it's "too slow"

is this correct?

it might be running at 60fps but 60fps on an HMD is too slow

[blissful bay]

Alrighty so, I have 2 scripts - one without threading, one with threading, first one causes lag, second one doesn't (tested and proven) and my task is to turn the second one into a library, which I'm struggling with, so I came back to the first, simpler one, to try if it helps me uncover something I am missing
I have managed to turn the first one into a library, but it didn't help me with the second one at all, so I asked here

[undone coral]

yes, but everything i described

is it true?

is that was literally happened?

[blissful bay]

This is true with the old script, not the new one

[undone coral]

well but the new one doesn't send picture at all now does it

not on the real device

the new script isnt' finished

it isn't "working" as you say

right?

and if you "just" had multithreading then it "will" work

[blissful bay]

It does, but I cannot turn it into a library

[undone coral]

i'm sorry, i am not trying to bully you or anything

i don't understand, is it running inside the unity game or not?

this new script?

i don't think it is right?

otherwise you wouldn't be here

[blissful bay]

Yes it does

[undone coral]

hmm

this is a weird gambit you are doing

[blissful bay]

The streaming works, but I need enclose it in a library, so it can be a marketable product on its own

[undone coral]

you're saying the streaming works...

what is working according to you?

you keep saying "working"

[blissful bay]

I am receiving JPGs at preset frame rate and dimensions

[undone coral]

a quite low frame rate i presume

which is fine

there's nothing wrong with that

[blissful bay]

Doesn't need to be 144fps for the target use

[undone coral]

i am trying to say it will never be at 60fps with this approach

on the quest 2, it will probably not be able to send at even 25, and also have a real game happening at the same time

it can be an empty scene, but not a real game

so if you dispose of this objective of trying to do 60fps

or even 25fps

for this application, probably 3fps will work

and this is besides the latency - i have no opinion, i would guess a second of latency will be fine, maybe even 5s, realyl depends what the idea is

you will have a much easier time

if you make the goal fps lower

i understand you might occasionally observe "60fps" in some situations, but i am telling you know, me, someone who knows a lot more about this than you, that off a quest, in an ordinary condition like someone else's wifi network and accessing a remote server, it's not going to work

[blissful bay]

Im comparing your code to mine, Im usind UDP client to send the data

[undone coral]

you think it's about the network

we tried to talk about this. there are boundaries with rules

they're complex

you haven't run a profiler. you don't know yet what is slow

[blissful bay]

I am absolutely not denying that

[undone coral]

i am just trying to instill some perspective of what is hard. 60fps is really hard

it's way beyond what you are going to be able to do

target 3fps

then, you can use an HTTP API. which is way simpler, and it is already "multithreaded"

that is to say, in unity, the unitywebrequest api does blocking IO on a different thread, and it presents an easy to use async API

this would have the added benefit of obsoleting this java backend, which was a bad idea

@blissful bay stay focused on what i am writing

i think you can go to class, and you'll read that UDP is fast and TCP is slow

or something

this just happens to be a uniquely hard problem

i can also tell you that this thing you are developing

there are other people developing it, it sort of already exists, specifically for this purpose, specifically people doing VR trainings and seeing what the trainees are doing in a browser

they use agora, and they accept the performance limitations, and i had the same exact conversation with them. agora is the library you are trying to replace

so there's another thing you can do. you're a student, you don't have to make a library to sell

you can work on making a really great piece of technology! just focus on that

you can try ot learn this stuff and just make it free and work on it with clear goals

@blissful bay do you see what i am saying?

[blissful bay]

I am

[undone coral]

okay

agora is pretty good

like if this sounds all so annoying, "just" use agora 🙂

it has samples, the samples look very similar to what i showed

saving the screenshot is slow. you'll see examples in their repo for how to do it correctly

https://github.com/AgoraIO-Community/Unity-Virtual-Camera-Prefab

https://github.com/AgoraIO-Community/Unity-Virtual-Camera-Prefab/blob/9981827812727f5899a013d652494890992aeac6/AgoraVirtualCam/AgoraVirtualCamera.cs#L504

@blissful bay exact same approach as yours

this all exists

just with a protocol that actually works

then you can use the agora react component

and agora signaling server

and show the feed in the browser

then you're done

you can do it in an android app too

[blissful bay]

the thing is - this part has been written by my colleagues and tbh I dont see a reason to rewrite it

[undone coral]

i am really not trying to bully you into doing anything that doesn't make sense

one perspective is that 3 developers do not do 3x the work of 1 developer. sometimes it adds up to less than 1 developer

[blissful bay]

what would be the benefit of changing a working piece of code?

[undone coral]

you're using that word again 🙂

[blissful bay]

let me reword that then - what is the benefit of changing a piece of code that does what it needs to do?

[undone coral]

because it isn't solving the problem

right now you're north korea trying to build a rocket ship

like you can launch a rocket repeatedly into the sky and is repeatedly crashing into the ground, and it goes a little higher every time

is it going to go into space? i don't think so

i'm sorry, you're right, afghanistan*

agora focuses on this one aspect that is 90% of the work

in this application

it's a very good value

https://www.agora.io/en/blog/how-to-embed-drag-drop-video-streaming-vr-oculus-quest/

@blissful bay using this will also help you focus on the domain specific problem of teaching using headsets

it will end this colossal distraction

@blissful bay share this colorful explanation with your friends, with the other students / grad students

tell them doctorpangloss thinks you guys are the Afghan Space Program right now

and i think they'll be convinced they should just use agora, and you will be in a much better place

[blissful bay]

there is one more issue - this is a commertial product, not a school project

[undone coral]

well

you said you were a student right?

are you?

like this is for an internship?

i don't know what to say, you pay for the agora fee, it is small

you pay for a unity license, you pay for the backend servers, you pay for agora

you can also try to do something impossible

[blissful bay]

yes

[undone coral]

you can afghan space program

[blissful bay]

and yes

sort of

[undone coral]

lol to sort of

is this your company?

i am trying to understand

you're doing it again

you're not saying the thing

anyway agora is your best bet, good luck out there

[blissful bay]

alright, thanks for your time and sorry for being a dork, lol

[undone coral]

lol

no it's okay

i am trying to help for real

basically you can go back to them and ask for way more time

or moderate expectations somehow

[blissful bay]

and I am trying to apply your advice on what I need to do

[undone coral]

you're certainly going to be able to start a thread and loop send udp packets with it

i don't think you really need help with that

you will readrawtexturedata and it will be fine

you should probably google "vr training instructor watch"

and see that there are like 10,000 people in 1,000 different companies working on stuff like this

[blissful bay]

well, thanks again

I will try to sort it out somehow and I will see

[rugged radish]

is there a way to make a compute shader kernel handle zero length buffers ?
if I don't set the buffer that is referenced in the kernel's code I get an error that the buffer was not set (it is known in advance it won't be used by the kernel)
and it's not allowed to create zero length compute buffers

right now I have to put dummy 1-length data in those cases, which makes the c# side of things somewhat ugly

[native plover]

There will be many CustomRigidbodies, but not many GravityVolumes

[icy aspen]

I am having a small problem with the playfab RegisterPlayFabUserRequest: I want to sign up users with a username and a password, this is my code:

public void Register()
    {
        var request = new RegisterPlayFabUserRequest
        {
            Username = username,
            DisplayName = displayName,
            Password = password,
            RequireBothUsernameAndEmail = false
        };
        PlayFabClientAPI.RegisterPlayFabUser(request, OnRegisterSuccess, OnRegisterError);
    }

The displayname, username and password get defined here in the update function:

displayName = displaynameInput.GetComponent<TextMeshProUGUI>().text.ToString();
        password = passwordInput.GetComponent<TextMeshProUGUI>().text.ToString();
        username = displaynameInput.GetComponent<TextMeshProUGUI>().text.ToString();

When i run this, this error pops up (it's from error.GenerateErrorReport()

I've read some stuff online and this is what i found: https://community.playfab.com/questions/36762/registerplayfabuser-fails-with-invalid-characters.html There seems to be a problem with TextMeshPro.

Does anyone know how to fix this?

this was the error i was talking about

[regal olive]

anyone know why this interface isnt available in Unity.Jobs

[sly grove]

Do you have the package installed?

[regal olive]

Burst package?

[sly grove]

Jobs package

[regal olive]

there's nothing like that in package manager

[sly grove]

it's an experimental one

you have to add by name

[regal olive]

oh great

thanks @sly grove

[sly grove]

I think by "kernel" they're talking about the compute shader "program"/"function" itself which are referred to as "kernels".

e.g. https://docs.unity3d.com/ScriptReference/ComputeShader.FindKernel.html

[dapper cave]

in 2021.3 is Mathematics still dog slow compared to Mathf?

[wooden cedar]

No idea, 2021 hasn't had a stable build that gave me a clean pass on my team's QA

But we need to support a large array of devices, so getting a true stable Unity build is very rare for us

[dapper cave]

oh boy, thanks for the heads up 😅

I wish more people would share their in-production experience of each Unity version... it's become a game on itself to find a config that's not shit

[chilly nymph]

What are you testing?

[dapper cave]

there used to be a bool in Application, I think it was called Application.isQuitting or similar, that'd go true if the game is exiting, thing's gone. you know what it's called now?

(hope not one of these god damn events)

[pliant crest]

whats wrong with events?

[pliant crest]

https://docs.unity3d.com/ScriptReference/Application-quitting.html

[rugged radish]

as PraetorBlue said, it's a compute shader kernel
I should've worded that more clearly

[maiden turtle]

I'd guess you need to make shader variants then, use ifdef and defines to make the buffer optional

[rugged radish]

gave it a quick read, looks like it would work, but also sounds painful, considering how small the issue is
thanks 👍

[stuck onyx]

is it possible after upgrading unity from 2020.3 to 2021 the script execution has increased quite a lot ? im on I2LCPP build

i had a quite heavy script that i tested on editor and device and it took almost 1 second to execute... now im doing exactly the same on device and its barely 200ms

[maiden turtle]

it's either internal optimizations or better code generation, totally possible

one or two functions got inlined in some hot loop

+200 speed

[stuck onyx]

I see....

thanks

[obsidian glade]

they don't - but a decoupled architecture that achieves its decoupling by using events will be easier to test

[maiden turtle]

interfaces same thing

that's one of the points of these things

[jolly token]

Is it? Test setup for events are pretty fussy because their async nature

[orchid marsh]

Targeting the individual credibility rather than the nature of async isn't beneficial.

I didn't see the mentioning of issues just that of asynchronous nature which could be fussy.

[jolly token]

How do you testing the event? If your code base has lots of events? With lambdas and counting events?
I guess basic unit test would look like this

int eventCount = 0;
EventPublisher pub1 = new();
pub.OnSomething += () => eventCount++;
pub.SomethingHappened();
Assert.Equal(1, eventCount);

When do integration test it will become more complex to set up
Because each event can expect other event to do anther thing 🤔

[obsidian glade]

the parts doing the work in making your code easy to test there are the interfaces rather than the events

having a simple interface for components to connect & interact, you don't necessarily need events to do that

the hard part of testing would come when you have a component you can't just instantiate as a prefab - perhaps some networking service or database IO, in which case you can replace the entire interface with a stub instead while the rest of your code can be tested as if it's there

[jolly token]

Even with integration tests you'd need to mock some behaviour, (e.g. Server response)
I find it is easier to mock things with interface and Tasks than bunch of event callbacks

[jolly token]

I guess it is code smell because it means your implementation is aware of test?

[tired creek]

Hi, I am writing code that removes loose vertices from a mesh. Ive come up with the following:

public static void RemoveLooseVertices(List<Vector3> vertices, List<int> triangles)
        {
            SortedSet<int> looseVertices = new();
            HashSet<int> usedVertices = new(triangles);
            List<int> subtractions = new(new int[triangles.Count]);

            for(int i = 0; i < vertices.Count; i++)
            {
                if (!usedVertices.Contains(i)) looseVertices.Add(i);
            }

            foreach(int v in looseVertices)
            {
                for(int i = 0; i < triangles.Count; i++)
                {
                    if (triangles[i] > v) subtractions[i]++;
                }
            }

            for (int i = 0; i < triangles.Count; i++)
            {
                triangles[i] -= subtractions[i];
            }

            foreach (int v in looseVertices.Reverse())
            {
                vertices.RemoveAt(v);
            }
        }

However this is O(n*n) which is not good.

Does anyone know how to do this in O(n) time?

[flint sage]

I doubt that is possible in o(n) unless you already have analyzed the mesh before hand

[tired creek]

what data do you think i would need to generate for the mesh

[flint sage]

Actually, can't you just add all used verts to a hashset and then check what verts (from vertices) are missing, wouldn't that still scale linearly

Idk what that subtractions is all about tbh

[tired creek]

subtractions says how much do i need to subtract from a given triangle index

so trianges match up with correct vertices after i remove the loose vertices

[jolly token]

And for same reason you are sorting looseVertices which is actually indices?

[tired creek]

i am sorting looseVertices so i can iterate from the largest to lowest index, because otherwise I woudl invalidate looseVertices values by removing stuff from vertices

[jolly token]

Hmm you could keep your deleted vertices as empty spots, keep your indices unchanged, and when you need to add vertices fill from empty spots.

[rugged radish]

can't you just reassemble the vertices and indices
linear time complexity

newVertices
newIndices

iterate over input indices
using them, take out vertices from the input vertices
copy them into newVertices
add the new index to newIndices```

at the end you have new vertex and index lists

[tired creek]

I need to remove them because otherwise Unity will consider them when creating MeshCollider convex hull

[jolly token]

Or you could set all of them as one of your valid vertices

[hasty nimbus]

How to get all gameobjects in the scene in C#7.3 (not 8)

[dawn haven]

hi, i use cinemachine for my TPS camera, I want to make a port of my game for android but i can't put mobile axis in my freelook component :

Is there a way to replace that with the touch screen?

[jolly token]

Why would C# version matter? https://docs.unity3d.com/ScriptReference/SceneManagement.Scene.GetRootGameObjects.html

[hasty nimbus]

"Feature 'range operator' is not available in C# 7.3. Please use language version 8.0 or greater." but i have the problem that i cant upgrade

[jolly token]

Then don't use range operator

[hasty nimbus]

But how can i get all gameobjects in the scene without using a range operator?

[jolly token]

Why do you need range operator, I just gave you a link

[tired creek]

@jolly token @rugged radish @flint sage

public static void RemoveLooseVertices(List<Vector3> vertices, List<int> triangles)
        {

            HashSet<int>[] tIndexesOfVertices = new HashSet<int>[vertices.Count];
            for (int i = 0; i < vertices.Count; i++)
            {
                tIndexesOfVertices[i] = new HashSet<int>();
            }

            SortedSet<int> looseVertices = new();

            for (int i = 0; i < triangles.Count; i++)
            {
                tIndexesOfVertices[triangles[i]].Add(i);
            }

            int offset = 0;
            for (int i = 0; i < tIndexesOfVertices.Count(); i++)
            {
                if (tIndexesOfVertices[i].Count == 0)
                {
                    offset++;
                    looseVertices.Add(i);
                }
                else
                {
                    foreach (int idx in tIndexesOfVertices[i])
                    {
                        triangles[idx] -= offset;
                    }
                }
            }

            foreach (int idx in looseVertices.Reverse())
            {
                vertices.RemoveAt(idx);
            }

        }

Changed to this and I think this is linear

pinging if you are maybe curious

[tired creek]

Either way this takes 5ms in debug mode when previous took 18ms

[blazing osprey]

I have an issue with pun2 after changing my build to uwp, is this the right channel or should I use #archived-code-general?

[jolly token]

#archived-networking ? or photon has own discord server

[undone coral]

why?

[undone coral]

are you saying there is a performance regression in 2021?

[blazing osprey]

huh

why is #archived-networking in the simulation category I collapsed that like a year ago and haven't opened it since

thank you

[last compass]

Hey yall I have a big project

[lavish sail]

and your skill level is?

[last compass]

Oh I am a producer of a project

[lavish sail]

I mean how much experience do you have with gamedev

[last compass]

Oh

I have been into it for about 4 years now

[jolly token]

Your profile says you're 21

[lavish sail]

so you're sure you're ready to handle a "big project"

[lavish sail]

having 4 years of experience at 21 is normal

[last compass]

I have been through many projects before big and small

[lavish sail]

alright then good luck

[last compass]

But i am looking for some programmers and I found this server

[jolly token]

I wouldn't count it as professional experience but yeah

[sleek ocean]

I have 4 years and I started at 13

[sleek ocean]

Don’t downplay because of age

[last compass]

I am gonna be honest I am not a professional at this

[sleek ocean]

I had friends make tens of thousands of dollars

[lavish sail]

years of experience don't even mean that much because it's all up to how much you've actually learned in them

[last compass]

but I have experience to be able to head into a new direction

[sleek ocean]

Yeah it’s just his reason is when he started and not the one between

[last compass]

I have worked with many ppl

but I am not myself a programmer

[tired creek]

why what

[last compass]

I am a producer and director

and streamer/recorder

[lavish sail]

so you hire people to do all the development job?

[last compass]

I wouldn't put it like that because we all do the development job

everyone has their own part in it

like we have animators and we have artists

[lavish sail]

and what do you do exactly

[last compass]

you mean the language or what game

[jolly token]

That's like minimum wage, sure
Can someone really say what to do in a big project if they didn't experienced professional environment

[sleek ocean]

I mean like at 16 that’s a lot for a month

[lavish sail]

what work do you do in the project? do you do 3d modelling? programming? sound? game design? animation?

[sleek ocean]

They dev on roblox so they make a lot more money but the games are more cash grabby

[last compass]

oh I see what you mean

[lavish sail]

oh yeah, that's roblox nowadays

[sleek ocean]

I quit though because single player is a super niche meta

That isnt pushed very often

I also wanna make games that can run smoothly at any degree

Performance is a major issue

And I found a lot of issues in the engine

Overall it’s really for devs who want to make some money

[lavish sail]

Roblox is a highly commercialized platform so it's almost all about money really

[sleek ocean]

Yeah

[last compass]

basically, my job in the project is to help put it all together and help with everyone's job and basically make the project run smoothly make sure the tests all get performed and I make sure it gets published correctly

[lavish sail]

so you're just overseeing

[last compass]

if that's the words you want to use

[lavish sail]

ok then, it should work as long as you don't expect people to work for free

but generally it won't work with non-commercial collaboration

[last compass]

The languages involved are C#, JavaScript, and maybe some Python

if you are interested in trying out for the project you can DM me

[lavish sail]

^

[sleek ocean]

Wait how did you

[lavish sail]

that's where you go if you want to hire

[orchid marsh]

#📖┃code-of-conduct

[sleek ocean]

Oh that’s an image

[blazing osprey]

I had 4 at 13

[sleek ocean]

As a writer it is highly offensive to be caught off guard in such a way

I shall log off for the day

[blazing osprey]

ok

[undone coral]

I am writing code that removes loose vertices from a mesh.
why this part? what is your objective?

[tired creek]

im writing an implementation of a mesh splitting algorithm

[undone coral]

for what purpose

i mean what's your goal

[undone coral]

there should be libraries that do this

[tired creek]

it kinda works

but I still need to fix the uvs

[undone coral]

ah

[tired creek]

and fill the holes

[tired creek]

to learn something

[undone coral]

you might want to look at poseidon CSG

"CSG" is the name for this class of mesh operations

like boolean operations

[long tangle]

i was making a first person shooter and i was trying to make the camera stop rotating when looking completely up or completely down. I have come up with this code and i wanted to know if there is a better way to do this

[tired creek]

this is alright

you can look at functions Mathf.Clamp() and Mathf.Min/Max to explore other solutions

a nice trick is to write
cameraX = Mathf.Clamp(cameraX + angleDifference, -90f, 90f)
instead of
cameraX += angleDifference
this way the angle will never be outside the desired range in the first place

[terse bobcat]

Hello does anyone know how to smooth the camera rotation i have liitle jitter

    {
        if (!HasAnimator) return;

        var MouseX = InputManager.Look.x;
        var MouseY = InputManager.Look.y;
        Camera.position = CameraRoot.position;


        XRotation -= MouseY * MouseSensitivity * Time.smoothDeltaTime;
        XRotation = Mathf.Clamp(XRotation, UpperLimit, BottomLimit);

        Camera.localRotation = Quaternion.Euler(XRotation, 0, 0);
        PlayerRigidBody.MoveRotation(PlayerRigidBody.rotation * Quaternion.Euler(0, MouseX * MouseSensitivity * Time.smoothDeltaTime, 0));
    }```

[tired creek]

do you call this in FixedUpdate?

[terse bobcat]

no

in LateUpdate

[tired creek]

also this should probably go in #💻┃code-beginner

[terse bobcat]

okay, but do you have a solution?

[tired creek]

not really

[queen meadow]

Trying to figure out a good flow for interactive animated meshes. Shortly named Active Ragdolls, usually.

I want to create a zombie, that I can interact with in VR. Grab his head, stab him etc; while keeping some animations like swiping towards you as he is grabbed by his head. Now, I got Active Ragdolls going.. though they aren't perfect in any matter, with addition, if I try to play a walking animation... well they love to bounce.

My currently solution which feels the wrong direction, is to do Animated Mesh -> Ragdoll -> Active Ragdoll (play get up animation) [if the character successfully get up at some angle]->Animated Mesh. Interactions with the mesh, a cylinder trigger would cause the Animated Mesh -> Active Ragdoll. Maybe even a zombie swipe causes it to go into active ragdoll.

If anyone has a clean way to reproduce something like Blade & Sorcery and/or Boneworks (less soo, too clumsie for my needs).
Thanks!

[lament salmon]

For my active ragdolls I setup them with ConfigurableJoints, and these extensions make settings their target rotation easy:
https://gist.github.com/mstevenson/7b85893e8caf5ca034e6
Nevertheless you will be doing a lot of tweaking

[queen meadow]

Ah ye, I'm also using ConfigurableJoints and have my guy standing upright... though I'm totally cheating by constraining the hip rotations. Though I guess my questions leads to how do you get the character to get up again after falling down?

This is what my Active Ragdoll looks like so far. With the puppet on the left.

[lament salmon]

Yeah, bipedal balancing is hard to do realistically, robotics engineers struggle with it IRL too... 😁
As to blending back to animation... you would usually have two animators/skeleton inside your character. First armature would always run the animations, and the second one has rigidbodies and joints enabled, copying their respective target rotations from the 100% animated version.
Then when your character gets back up/you want to disable physics, you just blend into 100% following animations, and finally back to using only animations

[queen meadow]

Ye trying to solve a robotics question is difficult. 😅

So are you suggesting that the Active Ragdoll will always be the visible model, the animated mesh would be hidden (with the animator Always Animating turned on). Then when checking if the character is upright, if it fails that test; then you want to disable the physics towards itself, and run the animation of getting up, then turn back on the physics when the character is upright again?

[lament salmon]

I mean it all depends on how you want your character to behave. But I think you got the basic idea of having 2 skeletons:

1. The Source skeleton, that always runs animations and yes, using Always Animating
2. The Physical skeleton with Rigidbodies & ConfJoints, that copies target rotations to each of it's bones from Source skeleton

If you want to 'disable' physics, just show the Source renderer
Use joint slerpDrive/angularDrive strength to simulate muscle strength

I'm by no means solving a certain problem you have here, but throwing at you this workflow/technique that works for me

[queen meadow]

Hm okay, and does animations need to be different in any way or can I use normal animations for example, walking and running.... currently causes a lot of bunch, maybe that's related with my fixed hip?

Right of course, I'm just throwing questions, since I'm at a very early state of learning active ragdolls, and it seems you have more of an idea than I do. Which I appreciate your guidance on this. 🙂

[lament salmon]

In my own project I use a separate AnimatorController when the character is in 'Active ragdoll' mode, just for custom sets on animations when physics are enabled, so yeah thats a possibility

A lot of this is so usecase specific that you just have to try a lot of stuff out

[queen meadow]

Hm interesting. It sounds like you don't use the animated mesh only for puppeteering, if I am not wrong, with custom animations for some physical ragdoll differences.

[lament salmon]

My characters are fully animation driven by default, but when they get injured/die, the active ragdoll activates, and the source skeleton plays appropriate hit animations

[queen meadow]

Okay that makes sense, performance would tank otherwise. 🤣

[lament salmon]

A couple of GDC videos to check out:
https://www.youtube.com/watch?v=TmAU8aPekEo
https://www.youtube.com/watch?v=7S-_vuoKgR4
Not Unity related directly, but similiar concepts and good visualization

[queen meadow]

When you are trying to get back up, are you still in active ragdoll?

[lament salmon]

I got some work to do on that part still, but it's a blend from physics back to normal 100% animated

[queen meadow]

Alrighty, yeah this sounds like my mindset was in the right place. Thanks, I really appreciate this!
( I have lunch, gotta go eat 🍔 )

[lament salmon]

happy to help, it's a pretty niche thing that no one seems to discuss much 😁 bon appetit!

[regal olive]

Woah that’s some accurate looking collider sizes, did you use unity’s default Ragdoll builder?

[queen meadow]

I used the Ragdoll builder then throw away their character joints. I did have to tweak up the sizes just a little bit.

I am planning to write my own Ragdoll Builder, because it Unity's version doesn't work well for active ragdolls or at least my use.

But first need to get the darn thing working. 🙂

[regal olive]

oh alrigh

thanks lol

[jolly token]

Does RegexOptions.Compiled work well in IL2CPP?

[queen meadow]

Thought to share where I was with a vid. 😄

[lament salmon]

might want to start by trying larger damping values, to avoid the shakiness. Idk how active this channel is but theres always #⚛️┃physics

also ragdolls are a pain to debug, so one idea is to create a ScriptableObject that all ragdolls use to get their joint values

makes it easier to debug and test different values runtime

just a peek on my SO's inspector so you get the idea

and then multipliers and mass scales etc for each type of bodypart... you just adjust them until it works like you want

[regal olive]

oh my god they are alive

[grave vortex]

Can I set render order by render layer rather than material type?

[torn basalt]

under the hood, where does transform.localscale get its info from to determing the xyz scale of an object?

[wild bane]

I switched unsafe code on in Unity Editor and tried to get a pointer to a Transforms Vector3 position but I get an error that I cannot access that address..
I'm either doing something wrong here or it just can't be done with such things
(I also learned C++ earlier so I'm quite new with how pointers work in C#)

private unsafe Vector3* _playerPos;

private unsafe void Start()
{
    _playerPos = &GameManager.instance.playerFollow.position;
}```

Even tried to just make it a var instead of Vector3* just to check if the type was incorrect, but after hovering on it it's say's it's a Vector3* so no issue with that, the problem is probably the way I try to access it or maybe I have to do something more than just turning the unsafe code on in Unity settings

[gaunt spoke]

Hello, I believe you can use pointers on structs only if the struct contains primitive value types, maybe that's not the case for Vector3 ? I also really wonder why do you need to use pointers here, can you tell us a bit more about your use case ?

[wild bane]

Actually there's no real reason for me using pointers here, I was just testing stuff and I wondered if I can just get a pointer to a Vector3 position instead of getting the Transform reference and access it's position via the Transform at all times

[umbral trail]

this is really dangerous because you're not checking the lifecycle of playerFollow so if it gets destroyed you'll crash

Also you can't take pointers of objects in the heap because they will move when heap compaction happens in the garbage collector

[tired creek]

Hi, can comeone tell me why consecutive calls of a function get faster?

Is the mesh data getting cached somewhere?

[flint sage]

Could be jit, could be faulty measuring

Could be cache

[errant plinth]

Could be a warm-up effect

[wild bane]

Ah, I see, thanks

[tired creek]

            var timer = new Stopwatch();
            timer.Start();
            Destruct.SplitResult splitResult = SplitMeshAlongPlane(v, t, u, new PlaneSplitter(new Vector3(1f, 1f, 0f), 0f));
            timer.Stop();
            Debug.Log("Splitting " + t.Count + " triangle mesh took " + (float)timer.ElapsedTicks / Stopwatch.Frequency * 1000 + " ms");

I do measuring this way

Is this alright?

[flint sage]

Not really, if you want reliable results you should really be using benchmark.net but not sure if you can integrate that into Unity really

[tired creek]

okay

didnt know about benchmarkdotnet

what can go wrong in the above method?

[flint sage]

Well you're only doing one iterate so you're prone to outliers

[umbral trail]

unity has built-in performance testing: https://docs.unity3d.com/Packages/com.unity.test-framework.performance@1.0/manual/index.html

[flint sage]

If you're running this on Start for example, you'll likely be influenced by unity initializing things

Hence why it could be slower

Ah cool, didn't know about that package

[umbral trail]

Add a 5 second delay and if that changes it, there was other stuff happening at the same time slowing it down

3 seconds seems a bit long for JIT

[flint sage]

You're probably right but we can't know since it's not a reliable way to test 😛

[tired creek]

i run this in update on button press

[umbral trail]

well I'd just use the profiler

[lament salmon]

Im curious, how is Stopwatch inaccurate?

[flint sage]

Stopwatch in itself is fairly accurate but the way they're testing isn't

[hushed moth]

Hi, I am using webrtc, rendering the image on a material (skybox/panoramic e.g. skybox.SetTexture("_MainTex", tex)) and I noticed (profiler) when I start the stream then the GPU usage is going high (82% in profiler) RenderTexture.SetActive()
How can I lower the gpu usage?

[undone coral]

i think because the first one is called when there is something in the editor slowing things down

it's a red herring

especially if you are splitting work across frames or something

[regal lava]

Note: This function is very slow. It is not recommended to use this function every frame. In most cases you can use the singleton pattern instead.

I don't use them, but I can see them potentially being useful on scene loading. You can probably get away with using them in smaller projects, but once you've got a lot of stuff loaded, that seems awfully inefficient at finding the objects you want.

[ashen shard]

there are much better ways of getting references

[SerializeField] and as mentioned singletons to name a couple

because you don't have to do any finding

xD

[jolly token]

Outside of efficiency and performance, it is still bad practice as it hides dependency and rely on global state without context

It does. Both methods make your logic "everything can be accessed everywhere"

Which may easy at scratching but horrible when maintaining

[magic ridge]

are you using burst? If so it's possible it hasn't compiled until the second time. You can force this to not happen via Jobs/Burst/Synchronous Compilation

IMO singletons are fine in specific cases yeah, but too much and it can get quite bad

ie "SoundManager" so you can play a sound easily.

[ashen shard]

but what is the best then?

[regal olive]

m

[jolly token]

Dependency injection is most generic solution widely used to resolve this kinda issue

[hollow jay]

I'm having a few problems understanding semantics in compute shaders, so if anyone can help that would be great:

[numthreads(32,1,1)]
void CSMain (uint3 threadId : SV_DispatchThreadID, uint3 groupId : SV_GroupID)
{
    //Use x and y of id to get position of Vertex
    uint i = threadId.x + groupId.x * resolution;
    uint x = i % resolution;
    uint y = i / resolution;
    uint mapIndex = x + y * resolution;

    float percentX = (float)x / (resolution - 1.);
    float percentY = (float)y / (resolution - 1.);

    vertices[mapIndex] = float3((percentX * 2. - 1.) * scale, 0.0, (percentY * 2. - 1.) * scale);
}

It seems that when the thread is not in group 0, threadId.x becomes 0. I tried to solve this by using the group's index, but that had the same result. Can anyone point me in the right direction to the cause of the issue? Thanks!

Oh, and here is the relevant C# code:

int groups = Mathf.CeilToInt(resolution / 32f);

//Dispatch shader
computeShader.Dispatch(0, groups, 1, 1);

[maiden turtle]

use them in editor scripts, serialize the references in arrays

is generally how i do it

[hollow jay]

Update: I fixed the problem. I was supposed to be dispatching (resolution * resolution) / 32 groups, not just resolution / 32

[timber flame]

What data structure do you prefer to use for open set in A* algorithm?
SortedDictionary or Dictionary itself?

SortedDictionary
Retrieval (smallest f cost): O(log(n)), Add: O(log(n)), Remove: O(log(n)), FindByKey: O(log(n))
Dictionary
Retrieval (smallest f cost): O(n), Add: O(1), Remove: O(1), FindByKey: O(1)
or use both? store nodes in both

[compact ingot]

a priority queue (heap). As a matter of principle in implementing a performance oriented algorithm, you generally should not use general purpose implementations of data structures as they are in many cases wasting performance due to their generality. So if you bother to implement A* you should also bother to write or find fully optimised data structures for it. Big O is pretty meaningless for this purpose as well, you will care a lot more about performance on small sets and how big that O(1) actually is.

[timber flame]

Yes, thanks. Heap is more efficient than Red-Black tree for this purpose (open set in A*)
but to know if a node is in the open set or not O(1), a hash set is required, right?

and, isn't the internal implementation more performant? I mean .Net libs

[compact ingot]

They are very good for the generic case but not optimized for any special case, the backing datastructure may even be theoretically optimal, but that is only the first line of optimization, ideally you want to allocate your own continuous region of memory for it and use all properties of your specific algorithm variation/expected data/use case to eliminate extra work that a generic datastructure would perform

it is generally not possible to implement a generic tree data structure that performs well for a wide range of cases. There is just no real optimization that is independent from the size and structure of the data actually contained in it.

[blissful moth]

hey can anyone help me on how do i connect the joystick to the weapon looking point like this..any help will be great thanks

[inland delta]

Better not to use this asset at all

[blissful moth]

you mean this?

[inland delta]

This "MoreMountains top-down engine" is not modular or easily extensible

Pretty coupled code

[blissful moth]

yes

[compact ingot]

TDE is a prototype engine, for a real game it gets in the way constantly.

[blissful moth]

the mobile controls are very buggy just wanted to know how they did this ..cant get through that code

[compact ingot]

if it’s not obvious how to set it up from the docs and ui, best not use it

[blissful moth]

yee ill check one last time if i can scrap something i can use

[lone minnow]

Hello I'm not sure if this is correct channel to ask this
I'm trying to build player by code and my target platform is dedicated server but it's unavailable in the old Enum only in the new Enum NamedBuildTarget.Server

So I'm unable to call BuildPipeline.BuildPlayer

[undone coral]

is this exact demo scene not visible?

have you played virtual joystick games on mobile?

[undone coral]

retro genres are coupled

another perspective is, retro doesn't make sense for mobile

[jolly token]

You can build dedicated server by setting subtarget to StandaloneBuildSubtarget.Server

target should be standalone you're trying to build

[coarse cave]

Hello

is there i difference betweeen this ?

[fresh salmon]

First one will get input on your FixedJoystick, on the horizontal axis, going right
Second one will get input when you press W on keyboard

So entirely different

Next time in #💻┃code-beginner or #archived-code-general, not an advanced question

[coarse cave]

I am sorry sir

But in code-generel, there was no one capable of halping me

[coarse cave]

I have a script. When I use the KeyCode.W the code works just fine. But when I use the FixedJoystick, the functions are being called too, but nothing is happening

Can I send the code please, its a car controler.

[lone minnow]

I'm really trying to aim into dedicated server as It would help me better

[jolly token]

That's how you build dedicated server, are you saying you have problem applying it?

[surreal quarry]

Is it even possible to use transform.Translate as the inDirection for Vector3.Reflect, or does it require rigidbody.velocity to work correctly? My projectiles use transform.translate for movement.
I've been trying to implement a bullet parrying system for a game, but currently it works in a way that the projectile spawns from behind of the enemies that shot the projectile, after trying to parry it back at the enemies.
It's like the projectile spawns from a different world position after the reflect function.

[jolly token]

You should share the code, Reflect is just mathematic calculation

[surreal quarry]

private void SendProjectileBack() {
//TODO FIX THIS
// The projectiles spawn from wierd position.
reflectDir = Vector3.Reflect(_enemyProjectile.transform.position, _normal).normalized;
_enemyProjectile.transform.Translate(reflectDir);
}

private void OnCollisionEnter(Collision collision) {
  if (!collision.gameObject.CompareTag("EnemyProjectile")) return;
  _normal = collision.contacts[0].normal; // get collision normal from box collider
  _enemyProjectile = collision.gameObject;
            // DEBUG
foreach (var item in collision.contacts) {
Debug.DrawRay(item.point, item.normal * 100, Random.ColorHSV(0f, 1f, 1f, 1f, 0.5f, 1f), 10f);
  }
SendProjectileBack();
}

[rugged radish]

probably caused by local - world space mismatch
try using world space in that Translate (I assume you move the projectile somewhere else, because that code will only move it 1 unit away)

[surreal quarry]

yeah, I'm moving it inside the projectile script itself

[jolly token]

You are putting position as argument of Reflect, it should be direction

[surreal quarry]

what would the best way to the get the projectile direction? Since I want to use other projectile types for the parry system too

[jolly token]

Using the same value you are using to move the projectile

[dapper cave]

is RectTransform.hasChanged no longer working? It used to only be true if the transform changed

oh fuck, I know what's going on, UI autolayout is chaning the rectTransform every frame even when unnecessary... wow

[misty glade]

So, in my game I have this "radar" thing showing a planet that you're approaching. I've added a little static effect to it, but I want to add a little fake handheld camera movement to it, getting it to kind of wobble around in the frame. I've tried tweening it to a random point in a unit circle in a random amount of time, but it just looks stupid - like it's bouncing around.

Any ideas?

here's the shader "flickering" i'm using.. might be a little hectic, I'll probably turn that down a smidge

[misty glade]

Sigh.. this looks janky as heck. Any ideas?

(tweening to a random spot in the box for a random time between 0.1-0.6sec with an in-out ease)

[jolly token]

Shader looks nice. If you wanna make it look like it's having connection issue, I don't think tweening would be good for that (too smooth). maybe just teleports with smaller range?

[sly grove]

this one looked good

[misty glade]

I was sorta wanting to do like a battlestar galactica camera shake .. but.. it's kind of hard to emulate. I suppose there's a reason those animators have entire studios of people doing this shit :p

zooms, blurs, off-centers etc

lemme finish tweaking this shader and then lemme know what you think (I'm making the saturation come up as you get closer to the destination)

a little long, sorry

but as you get closer.. the flickering gets more sparse and the saturation increases to 100% - it's almost not noticeable until you hit the destination and see the next planet (fully desaturated and full flickering)

[jolly token]

I like the concept 😄 just the smooth interpolation between position kinda looks unnatural

[misty glade]

does that look good? bad? weird?

Not sure what to fiddle with any longer.. have been looking at it too long to see "the whole"

maybe the in-out circ ease should be .. something else

[jolly token]

IMO you don't really need to interpolate this kinda thing

Because it should look like sudden change

[misty glade]

oh, you're just saying .. "flick" it to a new location every so often..?

that... might be weird?

(I'll try)

[jolly token]

Kinda, I'd tweak with cooldown and distance

[fervent parcel]

Hello, in custom Editor, how do I go about making the Inspector scroll bar either hide or show permanently?

I am getting this jittery effect where the inspector resizes just because the bar disappears when I have smaller list size

[misty glade]

@jolly token not sure it's better .. thoughts?

[jolly token]

Hmmmmm yeah I think the sample one looks nice because it matches with timing that it jitters & only moves little bit horizontally

But I am no artist 😿

[misty glade]

neither am i lol

ah well you know what? this is good enough, i've probably burnt like 3 hours just fiddling with this

cuz now i'm making easter egg cows flying in space

[jolly token]

Lol

[gray pulsar]

Another 2c: I like this better than the original drifting, but I think it would be better if it blinked completely black for a second before repositioning. And the very small movements look better than the large movements.

How long is this going to be playing for, though? I feel like it'll be distracting if it is onscreen for long periods of time. If it is short, having the planet start small and grow bigger as you get closer could be another way to give it some movement. (I guess that might work okay even if it is a longer period of time)

[misty glade]

It's on the screen 100% of the time on the "idle" screen, but it's.. pretty small overall:

It shouldn't be too distracting actually, since most of the gameplay isn't "on" this page all that much.. you're taking care of your missions, seeing what upgrades you can buy, managing your crew, doing battles - all of which are on separate screens

you do come back here in between those things but .. mostly just to make sure you don't have anything to do

[gray pulsar]

mmm, in that case I think the planet growing as you get closer instead of jumping around might be kinda cool

[misty glade]

i'm doing a planet in the game space that grows as you approach already.. so I was sort of thinking the header there would be like a "radar" or something

but I wanted to do the planet growing in the game space kind of like EVE online (which I used to play) - ie, you pretty much don't see it until you're at 99%

https://www.youtube.com/watch?v=FUcLYN3NX3c like so

[undone coral]

use

var noise = amplitude * (Mathf.PerlinNoise(frequency * (Time.time + offset), 0f) - 0.5f)

[mint sleet]

Hello folks!
I am coding and interpreter that sits in between my backend and unity.
I wonder what would be the best practice for model mapping? Writing each model in separate classes or putting them into, for example Models.css

[maiden turtle]

an interpreter of what? what sort of model?

[glass glade]

i'm using this code to change the volume settings at runtime

ColorAdjustments colorAdjustments;
FindObjectOfType<Volume>().profile.TryGet(out colorAdjustments);
colorAdjustments.saturation = new ClampedFloatParameter(saturation, -100f, 100f, true);

the values are changing in the inspector, but are not visible in the game??

[strange cradle]

I've got an interesting problem......
USB Steering Wheel with pedals and H-Shifter (Logitech G29)
Works on the Unity player, in Unity....
But if I build to an Android, only the button presses are detected....???
I can't seem to pick up on the axis movement at all....(on the phone)
Ps. Connected via USB OTG.... I'm soooooo close, I can taste it!
Button presses are working!!!
I just need to figure out what input Unity is expecting for the axis to work?

[maiden turtle]

it's either not reread each frame, some calculation involving it having been cached, while setting that value via the inspector does not trigger any sort of update event. or you're looking at a wrong object in the inspector

[maiden turtle]

afaik unity's new input system's input device support is still worse than some 3rd party solutions, check if the device is supported at all

[strange cradle]

I've been reading the same....
I have no experience with the old system (or any input system to be honest, im usually just point and click style)
But at this stage, I'd be happy to do it in 'any' way that works...
I just need the values coming from the pedals and wheels 😢

[maiden turtle]

I've tried Rewired, I know this lib supports virtually any input device. But find out whether your thing is supported simply by unity first since you already have most of the setup

[strange cradle]

Oh I see... Yes! I think it's supported....
I base that on Unity detecting movements when looking at debug log, and moving the wheel, from the Unity Player...
And also, when clicking the "Listen" button, in the Input Actions pop up, Unity detects both button and axis movements....
Everything seems to work great on the PC....
But when deploying to the Android (Real Device) then we lose the Analigue Axis (Pedals and Wheel), but all buttons are working fine on the Real Android Device (Showing it's not a usb connection issue)

[glass glade]

can i trigger an update by code? or how would this work 🙂

[strange cradle]

I would put the code inside a method, and call that method...
For example, you could put all your Update code in a method called MyUpdate()
And then in the Update, you can call MyUpdate(), and then also anywhere else in the code too....
But, I feel like I shouldn't tell you this, because... I dont know "why" you want to do that... and there may be a better way to do what your trying to achieve...
This is just to answer you directly "How can I manually trigger an update by code"

[maiden turtle]

not by setting thing in the editor directly. you have to either read from the inspectoror every frame, possibly checking if the values have changed, or wrap the input boxes by using a custom editor, triggering an event after setting the value manually

there's also OnValidate, which gets called when any value changes

you can use that if you don't need granular update info

[glass glade]

thanks a lot for your help so far 🙂 I think I explained the problem wrong, I want to decrease the saturation base on how much health the player has left, the inspector wont matter. The problem is when I try to set the saturation like before, one can't see any changes on the camera. In contrast if I decrease the saturation on the inspector manually the saturation decrease appropriate on the camera

[maiden turtle]

you're setting it on a wrong object probably

[glass glade]

hmm I only have one volume active in the scene. The value for the saturation on this object is changing in the inspector but wont affect the camera

[maiden turtle]

it uses a custom editor. it might not be linked directly to the field. you may need to SetDirty, or something like that

maybe even SetDirty the camera

[glass glade]

thanks for your help 👍 , found the solution
use colorAdjustments.saturation.SetValue(new ClampedFloatParameter(saturation, -100f, 100f, true)); rather than colorAdjustments.saturation = new ClampedFloatParameter(saturation, -100f, 100f, true);

[cerulean scaffold]

When I know that two floating point values should have the exact same value,
is this a valid approach to verify that they are indeed exactly the same?
aFloat.ToString("N16") == bFloat.ToString("N16")

[sly grove]

if you want to check for them to be exactly the same just do a == b

[undone coral]

if you want to animate volumes robustly, you should create a volume with the saturation at the max color value you want, and then modify its weight

[cerulean scaffold]

I have a case where .ToString("N16") shows that two numbers are exactly the same, however when comparing the floats with == the result is false.

var mismatch = hashMessages
                .Cast<HashMessage?>()
                .FirstOrDefault(_x =>
                    _x.Value.VirtualTick == _message.VirtualTick &&
                    _x.Value.Hash != _message.Hash
                );


            if (mismatch != null)
            {

Debug.LogError(
                    $"Hash mismatch found!: Virtual Tick {_message.VirtualTick} with hash {_message.Hash:N16} has encountered hash {mismatch.Value.Hash:N16} with an approximate difference of {(_message.Hash - mismatch.Value.Hash):N16}"
                );```
`Hash mismatch found!: Virtual Tick 4 with hash 553,5958000000000000 has encountered hash 553,5958000000000000 with an approximate difference of -0,0000610351600000`

[sly grove]

they are different

why is your hash function producing a float anyway?

[cerulean scaffold]

It's so I can see how big the difference is

[cerulean scaffold]

Isn't this correct?: Floating point numbers only have 7 digits. All other digits are always 0.
How then can 553,5958000000000000 be different from 553,5958000000000000?

[devout hare]

That's not correct. Floats are accurate to up to 7 digits. Their decimal representation can have any number of digits (including repeating to infinity)

[sly grove]

"floating point numbers only have 7 digits" no not correct

they aren't actually represented in base 10 at all so some idea about how many digits they have in base 10 is not really meaningful

Try this @cerulean scaffold :

bytes[] b = BitConverter.GetBytes(hash);
int i = BitConverter.ToInt32(b, 0);
Debug.Log("data: " + Convert.ToString(i, 2));```

[devout hare]

If you want to compare two floating point values to see if they're practically the same disregarding rounding errors, there's https://docs.unity3d.com/ScriptReference/Mathf.Approximately.html

but as said, producing a float as a hash is a bit strange anyway

[sly grove]

most hash functions are "chaotic" in that a slightly different input should give drastically different outputs. "Difference" in hash outputs is generally not meaningful. Unless you are using a different definition of "hash" than everyone else.

[undone coral]

are you trying to synchronize a float seconds in a multiplayer game?

[cerulean scaffold]

Not seconds, I'm just trying to check if all clients connected to the host did some calculations with the exact same result each tick.
(It's for determnistick lockstep networking)

[cerulean scaffold]

Yea I know that a float is strange as a hash.
I just need to ensure that some calculations result in the same floating point numbers (on two different machines with the same CPU architecture).
And it looks like there is a difference for some reason.

[sly grove]

No

bad idea

this will never work

due to hardware differences you will simply not get the same results for floating point arithmetic on different machines

same CPU architecture isn't the issue

Even different CPUs with the same architecture can and will give different results.

If you want to do lockstep networking you need to be doing fixed-point math only

[cerulean scaffold]

Yea, or if I use DOTS jobs for all my calculations it should also be deterministic
https://forum.unity.com/threads/dots-determinism-not-yet-or-is-it-restricted-some-tests.846991/
Floating point in burst is deterministic on the same architecture.

I do most of my calculations with DOTS jobs but I could have missed something.

[undone coral]

It's for determnistick lockstep networking
what's your objective?

[undone coral]

Floating point in burst is deterministic on the same architecture.
i think we discussed this last time. they didn't test it well enough to know

in any case the language and architecture do not make things any easy for lockstep determinism

[cerulean scaffold]

deterministic physics

Thanks for your help @sly grove, @devout hare and @undone coral !

[cerulean scaffold]

Btw, here is the actual difference between the two floats:
1000100000010100110011000100001
1000100000010100110011000100010

[timber flame]

To find k closest points from a point, the best way is to use Octree/ Kd-tree?
There is a 3d array and I would like to find k closest points (specific id) from a point.
Also, these points are chunk based. The easiest way is to keep the target points in chunks and then for a point, find its chunk, then the adjacent chunks and finally find the closest ones
(Points are Vector3Int) grid games

Suppose there are a bunch of specific items in the world and I want to find the k-closest items

[pine pendant]

How would I replace the unity functions like physics.raycast() with a fixed-point version?

[sly grove]

you'd have to use a custom fixed-point or deterministic physics engine

That's what Photon Fusion does

[pine pendant]

Does unity have a deterministic physics engine?

[sly grove]

Havoc

But it doesn't work with GameObjects, only with DOTS

[pine pendant]

does unitys current netcode solution support dots?

[sly grove]

Good question to ask in #archived-networking and/or #archived-dots

[pine pendant]

Thanks for the help though with havoc

one step closer

[rugged radish]

depends on the number of points, and space dimensions
I needed the same thing, and after a certain threshold k-d tree was greatly outperforming full scan
for small n, chunk scans will be faster

not even that small n, I don't remember the exact numbers from my benchmark, but it was in the thousands

[timber flame]

yes, thanks

it is 3d

Can I use octree with chunks? or it is not required?

point in a chunk, then find the adjacent chunks and then use octree or directly use octree and find k-closest points

[rugged radish]

I only benchmarked k-d tree vs chunked, so can't say for sure

and in my case, I had 2d k-d tree
it scales better with dimensions

[placid jacinth]

Other channels occupied, will put this here:

Just wondering if there is an alternative to Coroutines that I can use on a class that is not derived from MonoBehaviour?

Creating a library function and therefore don't really want it to be a component, but I still need something to occur over time not immediately.
:o

[wintry wind]

LeanTween?

If not, they actually do something like you mention so maybe you can check their code

[jolly token]

Task

[stray pewter]

I'm not sure if this is "advanced" (sorry) - but is there any way to interrupt a gameObject from being disabled and do something before it gets fully disabled, eg. run an animation?

[stray pewter]

to expand on cathei's answer - you can use C#'s Task or UniTask to do async/await style coding - which is very similar to coroutines - UniTask has some Unity specific improvements

[west scarab]

I don't think there is a Unity native way, I think ideally you would call an async function / coroutine that plays your animation, then disables the game object.

[stray pewter]

yeah - interacting with another API that causes the gameobject to be disabled, was hoping I could hack my way around it.. oh well

@west scarab thanks anyway!

[split folio]

Threads? native to C# i believe

https://www.c-sharpcorner.com/article/Threads-in-CSharp/
https://learn.microsoft.com/en-us/dotnet/api/system.threading.thread?view=net-6.0

[hushed fable]

You are likely to make your code incompatible with WebGL when using Threads and Tasks, while UniTask should fallback more gracefully and avoid certain threading APIs that Tasks sort of implicitly rely on.

[sinful fossil]

Does anyone know if we can add type specific methods to a class that uses a generalized type?

class Test1<T>
{

}

class Test1<Color>
{
    public void Blur()
    {

    }
}

The example shows a class being redefined and type specified (I know that is wrong). Is there a way to do what I am trying to do?