archived-dots

[deft pilot]

exactly who cares?

why do you care?

[haughty rampart]

about how much data you send....

[deft pilot]

i mean in general

implementation wise it shouldn't matter what i decide on how to network

[haughty rampart]

the system as a whole just sounds majorly wonky and confusing

[rotund token]

I feel like your prediction layer is going to be very tough

[haughty rampart]

likely very hard to track down bugs

[deft pilot]

that sounds like a you issue thou?

like if i do run into those problems sure thats on me

[haughty rampart]

exactly, it's gonna be a you issue

[deft pilot]

but it shouldn't matter to you

this isn't a library

i built for this game

so its not like it hasn't been tested

[haughty rampart]

is it a library built for entities?

[rotund token]

Just out of interest what player count does it handle up to

[deft pilot]

unfortunately i've never stress tested that

[rotund token]

And what network conditions

[deft pilot]

i've never considered making a mmo

or anything with large mp design

(so at most 4 player testing)

[rotund token]

Will it handle say mobile conditions of say 5% or even 10% packet loss

Just curious

[deft pilot]

yeah packet loss isn't a problem

it does packet replay

and has a way internally to resync where possible

but thats assuming non-corrupted state

[rotund token]

There's a point where that causes more issues by adding an ever increasing delay

[haughty rampart]

going back to your previous issue: sync a timer over the network

[rotund token]

We've had issues resending world data when missed

[deft pilot]

oh just to confirm

this isn't a realtime library

or not designed for realtime

ie/you wouldn't use this for a fps

[haughty rampart]

?? so a turn based game or smth

[deft pilot]

doesn't have to be turn based

but high paced real time sync isn't the design in mind

anyway

like i said

[haughty rampart]

you can just sync every 5 seconds or so

[deft pilot]

this isn't a you problem

its a me problem if it has any problems

i just wanted to know how to change / cap the simulation speed

[haughty rampart]

told you that already

[deft pilot]

i'm not asking you to tell me again

i was just reiterating what the question originally was

[haughty rampart]

you can also just adjust the targeted framerate if that's an option for you

[deft pilot]

that doesn't seem to work

i tried that as a first option

[haughty rampart]

where?

[deft pilot]

with vsync 0 / target framerate w/e

in some awake mb script

[haughty rampart]

entities has a own clock on framerate and stuff independent of mb things

[deft pilot]

the targetframe adjustment is context sensitive?

[haughty rampart]

there's a framerate for MB and a independent one for entities

[deft pilot]

so how do you change the entities one?

[haughty rampart]

am trying to find it currently.

[deft pilot]

fair enough

[haughty rampart]

haven't needed that for a while

[haughty rampart]

i'm still searching, and unfortunately i don't have any pre 1.0 projects anymore, but iirc, in the entities Time class (not UnityEngine.Tme) you can say Time.timestep = 0.2f or similar.

[deft pilot]

i'll see if i can google around

thanks

[haughty rampart]

if that's not there, you could set the fixedtimestep and put your systems into the fixed update group
(or maybe that's even what i remembered in the first place, not sure)

[deft pilot]

apparently its systemClass.Timestep = blah;

[haughty rampart]

👍

[deft pilot]

            var timeStepGroup = World.DefaultGameObjectInjectionWorld.GetOrCreateSystem<FixedStepSimulationSystemGroup>();
            timeStepGroup.Timestep = 60;

[haughty rampart]

yeah seems like you have to put your systems in the fixed simulation group then

[deft pilot]

yeah for the ones that require syncing

anyway thanks for the info

[haughty rampart]

yep

np

[alpine elm]

hi... is the dots system fully ready and we as users should starting using it or is it still in beta?

[haughty rampart]

it's prerelease 1.0, so good foundation. but even 1.0 release is marketed as: for advanced users who want to leverage the performance.
so for the near future there won't be any more huge breaking changes and the system is stable, but it's not targeted to beginners

[alpine elm]

I understand... thank you 😄

[haughty rampart]

you're still highly encouraged to try it and it's production ready.
but there are also many features missing you might be used to with monobehavious. e.g. animation, sound, pathfinding,...

[alpine elm]

oooooh... I NEED animations and mono behaviours

[haughty rampart]

it is encouraged to do a hybrid workflow for now, so animation and stuff still sticks to monobehavious while you do the hard lifting of logic and game managing with entities

[alpine elm]

I see

thank you

I will start learning 😄

thank you again

[dense storm]

How come if I change the scale with Scale component data, it does not change the mesh graphic's scale?

#if ENABLE_TRANSFORM_V1
            EntityManager.AddComponentData(e, new LocalToWorld());

            EntityManager.AddComponentData(e, new Translation
            {
                Value = transform.position
            });
            EntityManager.AddComponentData(e, new Rotation
            {
                Value = transform.rotation
            });
            EntityManager.AddComponentData(e, new Scale
            {
                Value = _bulletData.Scale
            });
#else
            EntityManager.AddComponentData(e, new LocalToWorldTransform
            {
                Value = new UniformScaleTransform
                {
                    Position = transform.position,
                    Rotation = transform.rotation,
                    Scale = _bulletData.Scale
                }
            });
#endif

But if I change it in LocalToWorldTransform it scales the mesh's scale

What's going on why? @@

[rustic rain]

Are you using physics?

[deft pilot]

oh just an update its 1/60f assigning it 60 makes it simulate an update every 60s lol

now its decoupled from fps woot

[dense storm]

Yes

[haughty rampart]

well, duh

[rustic rain]

You need composite scale

[dense storm]

Ok I'll try that

[deft pilot]

shh i knew that

[haughty rampart]

it's the timestep, not the fps :P

[dense storm]

Do I need both Scale and CompositeScale or just one of them?

[rustic rain]

Just composite

[dense storm]

Ok cool

[dense storm]

Does not work, or maybe I setup wrong?

[rustic rain]

Show what you do

[dense storm]

            _combatEntityManager.AddComponentData(e, new LocalToWorld());

            _combatEntityManager.AddComponentData(e, new Translation
            {
                Value = transform.position
            });
            _combatEntityManager.AddComponentData(e, new Rotation
            {
                Value = transform.rotation
            });
            _combatEntityManager.AddComponentData(e, new CompositeScale
            {
                Value = _bulletData.Scale
            });

_bulletData.Scale is float

[rustic rain]

Composite scale is 4x4

You need only 3 values of it

I don't remember which

[dense storm]

I found that changing the y rotation value scales the projectile

Rotation.y is the new scale component y'all bamboozled me

[rustic rain]

🤔

I think having physics package messes it up

[rotund token]

just sounds like it's scaled in wrong direction

[dense storm]

Jokes aside it isn't solved, I'll just brute force it

4x4 means 256 possible combination, I'll try it all

[rustic rain]

just convert game object with scale

and see

how it's done

lol

[dense storm]

Boom

[rustic rain]

yeah, that's what I meant

[wicked trout]

Unity 2022.2.0b11 has fixed the player crashing when containing a subscene in the scene. When having set the compiler to IL2CPP

[rustic rain]

new patch?

pog

[wicked trout]

Yep

[dense storm]

So, setting Composite Scale does not change the LocalToWorld scale matrix

[rustic rain]

hopefully subscene baking doesn't require running game anymore

Burst: Support for detecting managed breakpoints in code compiled with burst, and automatically switching the affected code to the mono execution path to allow managed debugging. Requires Burst 1.8

from the patch notes

cool

[wicked trout]

Is this a good or a bad thing?

[rustic rain]

it's a promised feature

now you can attach breakpoint

and it'll disable burst for this job

if you use managed debugger

[wicked trout]

Cool 👍

[rustic rain]

UI Toolkit: Improved UI Builder inspector.

wonder what's that

[gentle gyro]

I ran a quick 2022.2.0b11 test with a IL2CPP build to the Quest 2.
Although it didn't crash, I'm not seeing my object in the Subscene...

[wicked trout]

Odd, I do have a problem with with one of my objects which appears pink for some reason. And if you have the Android build set to "Release" instead of "Develop" it will appear invisible. Maybe you have it set up this way?

[gentle gyro]

Nope, Dev...

I believe someone else had issues with materials as well but don't remember who...

[wicked trout]

Hum

[gentle gyro]

Well, magenta anyhow...

[wicked trout]

Well this material has its texture generated on runtime so maybe for some reason it doesn't like that

On the editor works 100% fine though

[gentle gyro]

Maybe a syncing issue?

[wicked trout]

Wait, are you waiting until the subscene is loaded?

[gentle gyro]

I mean on your issue...

[wicked trout]

Oh

[gentle gyro]

I'm not waiting, should I?

[wicked trout]

I do a bunch of stuff on a "Awake" void of one of my scripts that requires the subscene to be loaded

To make sure its loaded I infinitely check for one of the necessary entities to appear with the EntityQuery function

If it doesn't find it, it waits a frame and then it repeats

[gentle gyro]

Actually this simple test has Zero scripts...

[wicked trout]

When it finds it it turns on all scene objects

[wicked trout]

Well it's not what I was talking about then

[gentle gyro]

Is there no callback for it?

[wicked trout]

No clue

I imagine your object does bake in the editor right?

[gentle gyro]

I assume so...

Shows up in editor also...

I'll try a mono build...

Mono works...

[wicked trout]

Ok, btw I have updated from 2020.3 and since then my right eye on the Quest 2 has a lot of visual glitches on the edges of objects. (Lots of flickers and Magenta pixels) Do you by any chance have the same problem? I'm running vulkan.

[wicked trout]

Odd

Just checking (I don't know if it matters) have you also set the compiler to IL2CPP on the project settings or only in the build configuration?

Also I have set it to only compile for ARM. 64

[gentle gyro]

No magenta...

[gentle gyro]

I kind of expected it to work with Mono as it seems to be an IL2CPP thing...

[wicked trout]

Have you tried this to fix your issue?

This is my configuration if you want to compare

[rotund token]

this was already working

not sure why it was added again

[dense storm]

Resizing with old transform Entities 1.0ex8

[gentle gyro]

What is this?

[rustic rain]

didn't work for me 🤔

[wicked trout]

I also have it set to runtime data

[rustic rain]

also for some reason prefab instantiation doesn't work for me in baking

[wicked trout]

Try clearing the Entity cache

[rustic rain]

what's worse - Editor gets corrupt and requires restart

[gentle gyro]

Where is this?

[rotund token]

^

[rotund token]

worked for me ^

it was added in like ~b6

sometimes the IDE disconnects weirdly though and the breakpoints stop working, usually requires a resync of projects

[covert lagoon]

Is experimental Entities 1.0 only for Unity 2022? Should I still use Entities 0.51 and Unity 2021 LTS to make a full game?

[rotund token]

1.0 will only work in 2022.2b8+

do not expect it to be backported

full release should come with support for 2022.3 LTS

so it depends entirely on your timescale

if you aren't aiming for a release for say 2 years the you should definitely use 1.0

but if you were looking at a release in next 6-12months then i would definitely consider staying on 2021/0.51

[wicked trout]

Are you not using the Build Configuration Pipeline to compile DOTS projects?

[covert lagoon]

I would be making the game from around this December to June 2023.

[wicked trout]

You have to use it or it won't work

To use it Right Click your project > Create Build Configuration

And then configure the same way I did

[gentle gyro]

Ah, shoot!
I forgot about that...

[rustic rain]

oh god, I'm getting so done with all these bugs 😥

                    var planet = buf.Instantiate(planetSetting.planet);
                    buf.AddComponent(planet, new Parent { Value = e });
                    buf.SetComponent(planet,
                        new Translation { Value = new float3(planetSetting.distanceToStar, 0f, 0f) });

this causes error in baking resulting in errors spammed until editor restart

[covert lagoon]

How stable is Entities 0.51.x at this point?

[gentle gyro]

Great, thanks!
I may look into it tomorrow. It's not a high priority for me any more since my client changed my directive...

[wicked trout]

Alright 👌

[rustic rain]

it's stable enough, but it's just dead-born

[gentle gyro]

Good night!

[rustic rain]

too many changes compared to 1.0

so

I wouldn't start project on 0.51

unless you are ready to fix entities package yourself

[covert lagoon]

I doubt stable 1.0 will release early next year though.

[frosty siren]

is there a simple way to calculate chunk capacity in query?

[rustic rain]

archetype should have it

[frosty siren]

chunk have it by itself, but i want to get all possible entities count for query without allocating new chunks

[rustic rain]

just count all chunks?

[frosty siren]

all chunk's capacities

like currently possible count of entities

how much space i have for entities with current set of chunks

[rustic rain]

all chunks * capacity of archetype

[frosty siren]

yes, but query can include various archetypes

[rustic rain]

I guess it would be

get chunks for your query

and just calculate it one by one

[frosty siren]

yes, so how to do it quickly?😁

[rustic rain]

bursted?

[frosty siren]

i guess in 1.0, when all chunks have 128 entities (or somewhat) i can just multiply chuck count to 128 without checking it's capacity, but maybe in some future updates some chunks can again exceed 128 capacity, because they will have no switch state components

[rustic rain]

not all

128 is a cap

it can be lower

[frosty siren]

oh, yes, lol, stupid mistake 🙂

i remember there was some unity's example of custom native container which was a simple parallel sum writer, so i can try to implement parallel sum container for such purposes.

what i'm trying to achieve is:
i have some number wich is current count of entities. and i want to detect new chunks and resize current count to chunks summary capacity

[rustic rain]

🤔

why?

changing count of entities would be removing/adding

and I doubt you want to fill unwanted archetypes

[frosty siren]

No no, sorry, I didn't express myself clearly
i have compute buffer i want to resize to entities count in some query. But i want to resize it accordingly to new chunks capacity

like if there is some count exceed, i want to detect what chunk it was and expand compute buffer to it's cap

[rustic rain]

why not just calculate entity count then?

[frosty siren]

Because in this way i can be i situation, when i create new entity every frame and expand (reallocate) compute buffer and then fill it with data every frame, which is not great, so i have some step

[rustic rain]

but do it only on higher value

[frosty siren]

maybe i'm over complicating, so i can just have const step

[rustic rain]

if (bufSize < entCount) { bufSize = entCount;}

[frosty siren]

yeah, so you can update buffer size every frame with such solution

[rustic rain]

only if it's above

this way at some point you'll reach some highest value

and buffer will be fixed size for a while

[frosty siren]

what you mean highest?

[deft pilot]

hmm

[rustic rain]

assuming you don't increase entity count every frame without ever removing them, no?

[frosty siren]

i can imagine case when i just create entity every frame without any removing

like spawning some units in strategy game without killing old ones

[rustic rain]

well then, you're gonna run out of memory anyway soon, so does it matter? 😅

[deft pilot]

good luck reaching entity limit

[frosty siren]

theoretically if your entity has lots of components with lots of data you can reach your memory limit

[deft pilot]

of course

[frosty siren]

but still spawning one entity in frame will take so much time to reach any limit

[deft pilot]

but chances of that is pretty low

[rotund token]

I struggle to handle 100m entities on 32gb ram in editor

[deft pilot]

i should try that for fun

did you just spawn 100m entities?

or did they also have components

[rotund token]

50:50 crash

[rotund token]

Full components

[deft pilot]

ahh

fully rendered as well?

[rotund token]

No they aren't renderable entities

[deft pilot]

ahh okay

[rotund token]

I was stress testing my effect and condition system

[deft pilot]

lets see...

[rotund token]

Technically 110m entities

[deft pilot]

whats the max size tilemaps handles

[rotund token]

10m being targeted by 100m effects

[deft pilot]

welp

nativearray has a max length

it looks like

doesn't like 50,000 * 50,000 length

[rustic rain]

int should be max size

[deft pilot]

ahh its int.maxvalue sure

that makes sense

welp that was easy

is the editor window only 32bit?

(aka does it only allocate 4gb of ram)

oh shit nvm

[rotund token]

Haha yeah nah unity editor only using 4gb of memory is a really good day

[deft pilot]

this thing doesn't free resources

wtf

anyway to flush unity cache or something

[dense storm]

How to fix this? structs cannot be passed to or returned from external functions in burst. To fix this issue, use a reference or pointer.
Trying to create extensions.

    public static class Float2Extensions
    {
        [BurstCompile]
        public static float3 ToFloat3XY(this float2 position)
        {
            return new float3(position.x, 0, position.y);
        }

        public static float2 MoveTowards(float2 current, float2 target, float maxDistanceDelta)
        {
            return current + MoveTowardsDelta(current, target, maxDistanceDelta) ;
        }

        public static float2 MoveTowardsDelta(float2 current, float2 target, float maxDistanceDelta)
        {
            float2 toVector = target - current;

            float sqDist = toVector.x * toVector.x + toVector.y * toVector.y;

            if (sqDist == 0 || (maxDistanceDelta >= 0 && sqDist <= maxDistanceDelta * maxDistanceDelta))
                return target;

            float dist = math.sqrt(sqDist);

            return new float2(toVector.x / dist * maxDistanceDelta,
                toVector.y / dist * maxDistanceDelta);
        }
    }

Why these can't be burst compiled?

Nvm I found out they will be bursted if the calling method is burst compiled.

[rustic rain]

use in or ref

for every parameter

burst only works with pointers

[dense storm]

Ok I see, thanks!

[spice vale]

Anyone know how we access the destination world in baking systems?

[rustic rain]

should be World

property

[spice vale]

doesn't seem like it

my entity index/version is different between baking system and runtime system

[dense storm]

In my case, which params would be in or ref? I don't really understand.

[rustic rain]

in - readonly
ref - writeaccess

[spice vale]

Is your goal to burst compile these?

If you want to burst compile static methods you can't have a return I think. All arguments must be either ref, out or pointer.

[rustic rain]

you can

[spice vale]

didn't work for me last time I tried, but maybe they changed it idk.

[rustic rain]

hmm

actually

not sure

[dense storm]

Yep, they seem to be perfect target for burst compile

Extension methods usually are a lot of operations right

I'll do some more research and see if someone alrd encountered it

[rustic rain]

you don't need to compile such methods specifically

just call them from jobs

or burst compiled code

they will be compiled authomatically

you attach compile attribute on methods only if you want to call Bursted method directly in your code

[dense storm]

Ok I see, thanks!

[brave field]

🥲 windows il2cpp build still not working properly yet but seems like it's better now at unity 2022.2b11

[rustic rain]

[Worker0] ArgumentException: DestroyEntity(EntityQuery query) is destroying entity Entity(64:1) 'Pluto' which contains a LinkedEntityGroup and the entity Entity(64:1) 'Pluto' in that group is not included in the query. If you want to destroy entities using a query all linked entities must be contained in the query..
Unity.Entities.EntityComponentStore.ThrowDestroyEntityErrorFancy (Unity.Entities.Entity errorEntity, Unity.Entities.Entity errorReferencedEntity) (at Library/PackageCache/com.unity.entities@1.0.0-exp.8/Unity.Entities/EntityComponentStoreDebug.cs:592)
Unity.Entities.EntityComponentStore.ThrowDestroyEntityError (Unity.Entities.Entity errorEntity, Unity.Entities.Entity errorReferencedEntity) (at Library/PackageCache/com.unity.entities@1.0.0-exp.8/Unity.Entities/EntityComponentStoreDebug.cs:582)
Unity.Entities.EntityDataAccess.DestroyEntitiesInChunksDuringStructuralChange (Unity.Entities.EntityQueryImpl* queryImpl, Unity.Entities.SystemHandle& originSystem) (at Library/PackageCache/com.unity.entities@1.0.0-exp.8/Unity.Entities/EntityDataAccess.cs:596)
Unity.Entities.EntityManager.DestroyEntitiesInChunks (Unity.Entities.EntityQueryImpl* queryImpl) (at Library/PackageCache/com.unity.entities@1.0.0-exp.8/Unity.Entities/EntityManager.cs:4763)
Unity.Entities.EntityManager.DestroyEntity (Unity.Entities.EntityQuery entityQuery) (at Library/PackageCache/com.unity.entities@1.0.0-exp.8/Unity.Entities/EntityManager.cs:3338)
Unity.Entities.RemoveEntityInBakeDestroyEntitiesSystem.OnUpdate () (at Library/PackageCache/com.unity.entities@1.0.0-exp.8/Unity.Entities.Hybrid/Baking/RemoveEntityInBakeDestroyEntitiesSystem.cs:21)

[solemn hollow]

i wasnt aware of this behaviour 0.o is this new?

[rustic rain]

idk what's up with it

but it's super annoying

and I don't know how to deal with it

looks like

I can't instantiate anything

which sucks

[solemn hollow]

baking only allows to instantiate additional entities right? not entities spawned from a prefab

[rustic rain]

yeah

thing is

[solemn hollow]

is that true even for baking systems?

[rustic rain]

ah nvm

yeah, everything I create in baking

is casuing this erorr

[solemn hollow]

well you could let the linked entities match the query in RemoveEntityInBakeDestroyEntitiesSystem

@rustic rain instantiating gameobjects inside bakers to then let their bakers run doesnt work right?

[rustic rain]

not allowed

[solemn hollow]

you'd need a prebaking step 🙂

[deft pilot]

anyway from the editor to tell how many entities exist?

(also can you custom name your entities)

[rustic rain]

🥴

[brave field]

🥲 omg. This baker behavior differently

[muted star]

Hi, is there a way to check if burst is enabled in code?

[rustic rain]

declare boolean

and use [BurstDiscard] method

to change it's value

if changed - no burst, if not changed - burst

[muted star]

cool, I'll give it a try 👍

[gray nest]

Hey guys, what's the proper way of loading/reloading a hybrid ECS level? I run into errors no matter what I try, here's the closest I've gotten:

   SceneSystem m_SceneSystem = World.DefaultGameObjectInjectionWorld.GetExistingSystem<SceneSystem>();
   manager.DestroyEntity(manager.UniversalQuery);  
   manager.CompleteAllJobs();
   SceneManager.LoadScene(0);
   m_SceneSystem.LoadSceneAsync(m_SceneSystem.GetSceneGUID("Assets/Scenes/World1.unity"));```
I get this error:

[solemn hollow]

u can use EntityManager.SetName()

[brave field]

🥲

Unity.Entities.IBaker.CheckValidAdditionalEntity (Unity.Entities.Entity entity) (at Library/PackageCache/com.unity.entities@1.0.0-exp.8/Unity.Entities.Hybrid/Baking/Baker.cs:1383)
Unity.Entities.IBaker.AddComponent[T] (Unity.Entities.Entity entity, T& component) (at Library/PackageCache/com.unity.entities@1.0.0-exp.8/Unity.Entities.Hybrid/Baking/Baker.cs:1556)```

[solemn hollow]

you can only use CreateAdditionalEntity while baking

[brave field]

🥲 This is disaster. I need to rethink and rewrite most of the code just to make it compatible with baker

[solemn hollow]

I feel you. Took 4 days to just get to the point where i could press play again. Now i have to rewrite some systems to match the baker workflow too.

[rustic rain]

Where unity devs when you need? 😅

[urban ore]

So I've been reading over the new DOTS guide, and reading through the ECS tutorial, and I've noticed that it doesn't ever actually use state.Dependency when scheduling jobs. My impression (from reading the documentation it's made quite clear) is that you should always use/set state.Dependency whenever you schedule a job in a system. Is this excluded in the tutorial just because their jobs don't happen to overlap? Is it still the best practice to use/set state.Dependency anyways?
https://github.com/Unity-Technologies/EntityComponentSystemSamples/blob/master/DOTS_Guide/ecs_tutorial/README.md

[proud jackal]

You should always pass in state.Dependency for jobs, HOWEVER. IJobEntity has automatic implicit dependencies (as the exception). So when you pass your own JobHandle into an IJobEntity you'll take control, however if you don't pass in a jobhandle, it will complete the dependency for you, so:

new MyJobEntity().Schedule();
// is equal to:
state.Dependency = new MyJobEntity().Schedule(state.Dependency);

// but this is not equal, and since you passed a jobHandle yourself, you have to set state.Dependency yourself:
new MyJobEntity().Schedule(state.Dependency);

[urban ore]

Huh, okay! The other page on SystemState.Dependency (https://github.com/Unity-Technologies/EntityComponentSystemSamples/blob/master/DOTS_Guide/intro/intro-entities.md) doesn't mention that, and I don't see any other docs on that, but maybe that's excessive information for that section. I know it's all WIP. But that's really good to know - thanks!

I think what's really confused me is that many of the examples I've seen online just kinda do it anyways.

[proud jackal]

No worries! I'll take that into account for the IJobEntity docs, thx for the feedback! 😄

[urban ore]

I suppose maybe that's what the (directly or indirectly) bit means, and I just wasn't aware of the indirectly bit!

[proud jackal]

Potentially 😆

[rustic rain]

What would be the intended way to instantiate additional GameObject (or entities) during baking?

let's say I want to have one MonoB with fields for prefabs and then spawn them through code during Baking. Is there even a possibility to do that atm?

[brave field]

@proud jackal Btw any plan to improve this for baker?

[rustic rain]

actually this is directly related to my question above 😅

[brave field]

I guess it's different. What I want is able to add component to child entity at baker

[rustic rain]

oh, little confused

[brave field]

Now with baker it's not possible anymore

[rustic rain]

yeah, that's not supported and shouldn't be actually according to current workflow

[brave field]

🥲

[proud jackal]

Well, baking can't spawn GOs, as SubScenes can't contain GOs, but you can have baking create the runtime rdy format to spawn them as soon as the scenes load

class MyAuthor : MonoBehavoiur {
  public GameObject[] prefabsToSpawn;
  class PrefabsToSpawn : IComponentData {
    public GameObject[] prefabsToSpawn;
  }
  class Baker : Baker<MyAuthor> {
    protected override Bake(MyAuthor myAuthor){
      foreach (var go in myAuthor.prefabsToSpawn)
        DependsOn(go);
      AddComponentObject(myAuthor.prefabsToSpawn);
    }
  }
}

partial struct MySystem : ISystem {
  //..
  public void OnCreate(ref SystemState state) => RequireForUpdate<PrefabsToSpawn>();

  public void OnStartRunning(ref SystemState state){
    Object.Instantiate(state.EntityManager.GetComponentObject<PrefabsToSpawn>(SystemAPI.GetSingletonEntity<PrefabsToSpawn>()))
  }
  public void OnStopRunning(ref SystemState state){
    Object.Destroy(state.EntityManager.GetComponentObject<PrefabsToSpawn>(SystemAPI.GetSingletonEntity<PrefabsToSpawn>()))
  }
}

I think will do the trick

[rustic rain]

bakers are run in parallel and meant to only add data or temporary data to main or secondary entities

[rustic rain]

ah that sucks

I suspected that this is the only way rn

but I didn't want to accept it 😅

btw

is there any baking specific components rn

so for example

I create additional entities

in Baker

and then I just copy archetype and all component/sharedComp data from prefab entity to that additional entity

[proud jackal]

Do pls write you message in one message haha 😆

[rustic rain]

can it break anything?

[proud jackal]

I mean that sounds right but I wouldn't be the person to go to there, depends on the behavoiur you want?

[rustic rain]

Here's the code I want to run to copy entity data into another

question is:
there used to be conversion specific components that were removed after conversion and they also used to be entity specific.

So is there anything like that in Baking so that maybe I should avoid it for certain Component Types?

[proud jackal]

When baking happens there can be baking comps, if you were to copy an entity's data from one to the next inside a baking system, then both entities will now contain the same comps including baking comps, and any subsequent baking systems dependending on those comps will take affect run their baking stuff, just like how it works in runtime. This said, the baking comps won't be there if you were to copy in normal runtime, as baking comps are only present in baking systems.

The baking comps (components not serialized) are marked by [BakingType] and [TemporaryBakingType]. If I were you I would just search for those and see which comps use them.

[rustic rain]

I'm talking about internal comp types

which currently we can only find out by debugging baking execution

[drowsy pagoda]

When detecting when an entity is instantiated within a system, is CleanupComponent the way to go? I understand how to use it for detecting destruction, but creation, I just do With<SomeData> and None<Cleanup> ? Is that the new convention now?

[spice vale]

yes that is how it's always been

[solemn hollow]

if you dont have to cleanup i guess you could just use a normal IComponent to mark it

[drowsy pagoda]

thx. I'll add it anyway in case later I will need to do some cleaning.

[solemn hollow]

you need to be aware that you specifically HAVE to cleanup the component then when you destroy the entity.

[drowsy pagoda]

Yeah I'm aware 😉

Just like the good ol'IStateComponent 😉

RIP

[urban ore]

As a somewhat more complex extension of my previous dependency question - The automatic (implicit) dependency system seems to automatically operate on entities/components and figures out the right depedency chaining. Is there any way to build on top of this automatic system? Is it attribute based? Or completely internal to components?

In my case, I'm basically trying to pass a few NativeQueues to a number of systems that spin off jobs, and I want those jobs to complete prior to the job that processes the queues. I can certainly handle this explicitly (seems like Tertle's event system takes this approach?), but I'm just wondering if there's any way to be implicit about it to avoid the duplicate code?

[solemn hollow]

that basically works automatically. just order the systems with the [UpdateAfter/Before] attributes

[spice vale]

Auto dependency uses components to figure it out. If you add your queues to a component and access them via the various EM/SystemBase/SystemAPI/ISystem methods the dependency will be handled for you.

[urban ore]

My impression is that that doesn't imply job ordering in the way I'd want it to?

That is, the UpdateBefore/UpdateAfter attributes.

[spice vale]

UpdateBefore/UpdateAfter is just the order the systems update, it doesn't affect the dependency directly

[urban ore]

Right.

So, I did consider using a component as a placeholder. My concern is how that would order the using systems. If they're all on one component, and I want (A,B,C) as generators with (D) as a consumer, then you'd end up with an A -> B -> C -> D dependency chain or something like that.

[solemn hollow]

im pretty sure it does. one systems dependencies are resolved before other System that is depending on it runs. Dependency = new job.Schedule(Dependency) basically tells the next systems to wait for this Systems Dependency

[spice vale]

yes

[urban ore]

So you'd have to create a separate component per-queue to get the chaining right. Which... works. But honestly isn't much better (or maybe worse) than the explicit dependency management approach. Maybe it would look nicer.

[spice vale]

No, only if the two systems happen to read/write to the same component

[rocky dove]

Dumb question, can ECS systems be run in Edit mode? ie non-playmode? I saw there is a WorldFilterFlags.Editor

[solemn hollow]

yes thats true

[spice vale]

If system A reads and writes Comp1 and system B reads/writes Comp2 and they update after eachother, then their jobs will run in parallel.

[solemn hollow]

you can see them running if you check out the editorworld in the systems tab.

[rocky dove]

Thank you

[urban ore]

So, maybe to get back to my initial question - is it possible to tie into the automatic/implicit dependency system at a deeper level? Or is that automatic/implicit system strictly for IComponentData?

[spice vale]

Their system uses Types (Components) as the granularity, if you want finer granularity you'll have to handle it manually.

[urban ore]

Well, I'd generally say that I'm okay with type-based granularity. My queues do have types, after all. But they're not IComponentData types.

[urban ore]

I suppose that's not really true. What I'm really trying to avoid is the "this.Dependency bookending" in every Update method that something like Tertle's event system seems to require:

        protected override void OnUpdate()
        {
            this.Dependency = this.eventSystem.GetEventReaders<TestEventEmpty>(this.Dependency, out var readers);
            ...
            this.eventSystem.AddJobHandleForConsumer<TestEventEmpty>(this.Dependency);
        }

But the automatic/implicit system that exists for entities isn't really a bookending system. The dependency property for entities is generated each time from the dependent data. I'd prefer that approach. But I'm pretty sure it's entirely internal and can't be tied into.

[rotund token]

Won't be required soon

[urban ore]

How?

[rotund token]

Same way command buffer systems don't need it anymore

[rustic rain]

you access singleton

which is dependency

for the system you access

[urban ore]

Doesn't that cause a dependency chain for all the jobs that use the singleton?

Or am I just totally misunderstanding how it works. Probably just misunderstanding.

[rotund token]

It won't be a single singleton, each event type will have its own

[urban ore]

Yeah, okay. That's what we were discussing up above. My main concern was that I wasn't sure how the boilerplate would look, and if it would be much better. Do you know of any examples of it?

My other concern was that you'd still end up dependency chaining if there were multiple systems that could trigger the same event type, I think.

[rotund token]

There's no chain of access via read only singleton

[urban ore]

I'm just misunderstanding, then. I'll look more into the ECB singleton implementation. Thanks a lot!

[rustic rain]

mind explaining that bit?
I don't quite get how dependency works here either.
So if you do RO read of singleton in query it only ensures no RW jobs run at the moment?

[solemn hollow]

where can i enable live conversion? i want to see the result of baking

[viral sonnet]

icomp and entities just use the job system. it gets a bit mkre complex via queries but it's still built on the job system, job handles and revolves around explicitly declaring read/write job parameters

[viral sonnet]

afaik this is the option that's hidden in preferences and internal options. to enable open about and type internal

[viral sonnet]

in case a rw job was scheduled before the next ro job the rw job will finish.

[urban ore]

Yep, that definitely makes sense. But the Entities package also includes its own dependency system for helping get your job system dependencies right. That Entities dependency system is based purely off of components. If I have a custom thing that I need to make sure gets dependency chained (like a queue), the only way to do that automatically is through components. I think Tertle's suggestion is the only possible one - just wrap whatever that data is in an entity and then let the entities dependency system sort it out.

[robust scaffold]

Either use the internal toggle to get access to live bake or just run the project once. The baking result from entering play mode gets cached.

[rustic rain]

from what I understand:

1. GetSingleton writes to Dependency
2. Dependency is written into job's JobHandle

then if next system does same GetSingleton, it's RO == no completing previous job

[viral sonnet]

jobhandles and dependencies are from the job system. you can declare a chain of dependencies just as easy with native containers

[rustic rain]

meanwhile as soon as some system does GetSingleton RW - sync point, chain completes

I'm just trying to understand how it works, so I can implement similiar feature

[viral sonnet]

yes, though the sync point can be circumvented when declaring GetSingletonRW in OnCreate. only with GetSingletonRW in update you have a real sync point

so what works is declaring GetSingletonRW in oncreate and then just use GetSingleton in onupdate. the job system figures it out

[rustic rain]

though the sync point can be circumvented when declaring GetSingletonRW in OnCreate
wdym by that?

[urban ore]

Well, the base concept of job handles and dependencies are from the job system. The entities system then seems to add an additional automatic-dependency-management layer on top of that that's based on entities. And only on entities. I was wondering if you can get the automatic-dependency-management layer from the Entities package to react to something other than entities. I'm pretty sure you cannot.

[solemn hollow]

WTF happened to physics? Before with 0.51 i had 80 fps. now im down to 8 and im not even running my heavy logic... physics takes 80ms

[viral sonnet]

though the sync point can be circumvented when declaring GetSingletonRW in OnCreate
as you said, calling GetSingletonRW in OnUpdate calls .Complete on the jobs. it has that built in to resolve dependent jobs. doing it as i mentioned will leave it to the job system dependency and the job will get scheduled (with no .complete) and just runs after the system jobs that have RW depdency.

[viral sonnet]

i'm not quite sure what you want to achieve here. it's still automatic even with no entities and query dependencies. just set [ReadOnly] in job parameters and schedule the jobs in the correct sequence

[viral sonnet]

physics integrity enabled or safety checks?

[robust scaffold]

Seems like a possible fixed step doom spiral. What does the profiler say?

[viral sonnet]

also, afaik leak detection is enabled by default to full trace. all in preferences now

[robust scaffold]

Yea, and it's toggled back on every time editor resets as well. Annoying.

[solemn hollow]

for me its not in preferences.
Safety is off. integrity checks off. leak detection i cant find

ah damn its in a jobs tab

[urban ore]

I'm just trying to avoid boilerplate. You can see Tertle's response to me up above where he mentions how using a wrapping singleton around the relevant data helps with that and gets the automatic dependency management system to sort things properly. The ECB singletons do indeed do this.

[robust scaffold]

Lots of red. Lots of allocations? What's going on there?

[solemn hollow]

idk why i sometimes get so many fallback allocations. after editor restart it looks like this :

so allocs are not the reason

NarrowPhase is just extremely slow. but i wonder why. there shouldnt be alot of collisions happening.

[robust scaffold]

I'm doing my first dip into dots physics so I dont know what's going on in that image unfortunately. Try setting the FixedStep update manager to null. Disable the fixed step nature of it.

[drowsy pagoda]

Should I use BoxOverlap over BoxCast where I can? I assume overlap is cheaper or no?

[solemn hollow]

hmm i give up for today... for me CreateContactsJob somehow is 500x slower in 1.0.

[remote crater]

Is there a quick way to replace a Mesh/PhysicsShape/Physics Collider on an entity?

[solemn hollow]

i got the same amount of colliders in the scene and they are all correctly disabled as far as i can tell

[viral sonnet]

what's disabled? i had some regression with a disabled body that wasn't actually disabled

[remote crater]

Is this the way to replace Mesh and colors? https://www.youtube.com/watch?v=XMRSNlTYHFY&lc=UgxR4f9bI0Dc0z_oAhl4AaABAg

[solemn hollow]

i do spawn ProtoTypeAbilities on a far off location. they are excluded from physics. when i instantiate copies of them i enable the physics

[viral sonnet]

so first thing I'd say is that all disabled physics entities are actually calculated. best explanation why the job takes so long now

maybe test the query of the job

[solemn hollow]

but under relationships the physicssystem is not listed

no query hits them

[remote crater]

Sorry, I have this fielded.

[rustic rain]

that's the way to modify materials

to modify meshes you need Mesh advanced API

[remote crater]

I forgot I have the code laying around.

I actually just spawn gameobjects, change mesh and let it roll, it's not that big of hit ATM

I'll look into Mesh advanced API tho

Its good to become cultured! Thank you man of culture, Issue bro.

[rustic rain]

can use TODO for that

[remote crater]

Looks like what I did was had a special case to not access my Entity datapool

It returns a handle to the gameObject instantiated before it was converted

Then surgeries the Mesh etc etc

[solemn hollow]

the physicsexclude component doesnt work anymore right?

the mainability got both disable and physicsexclude. Subabilities only got the physicsExclude component because they still have to run in some systems. now all those subabilities are colliding like crazy

[robust scaffold]

I can see why Unity placed a 128 entity max cap, I add DOTS physics to an entity and the cap falls to 32 per chunk:

They throw bytes at components like it's free.

[solemn hollow]

i dont want to talk about my chunk utilisation... at some point i had it down to 2 entities per chunk.

how do i best get the physicsworldindex?

[robust scaffold]

It's an unmanaged shared component. You can get it anywhere.

[solemn hollow]

sry i meant the uint i need to put in there.

[robust scaffold]

state.EntityManager.SetSharedComponent();

[solemn hollow]

                {
                    Value =  ???
                });```

i mean where do i get the index from the physicsworld to enable physics on an entity that had physicsworldindex component removed at some point

[rustic rain]

just use 0

unless you setup multiple physics worlds per Entity World

it'll be just 0

[robust scaffold]

I think values other than 0 are used for smoothing and alternate worlds

[solemn hollow]

ah so more a netcode thing

[rustic rain]

no

they are used to different simulations

you can have as many physics worlds as you want

or maybe yes, maybe that's what is required for smoothing

kek

[viral sonnet]

lol [InternalBufferCapacity(16)] public struct PhysicsColliderKeyEntityPair : IBufferElementData { /// <summary> The key. </summary> public ColliderKey Key; /// <summary> The entity. </summary> public Entity Entity; }

16!

[rustic rain]

what the

[viral sonnet]

12 bytes per element. ridiculous

[rustic rain]

what is even purpose of this, lol

[viral sonnet]

if you use 208 reserved bytes per entity you have a DAMN good reason

so i hope you don't have 1 entity pair with 1 collider 🤣

[robust scaffold]

Absolutely ridiculous Unity's memory utilization.

[viral sonnet]

what's the cap if you add a LEG too?

[robust scaffold]

oh no, unity is dying, give me a sec

[viral sonnet]

math says 25 haha

[robust scaffold]

Huh, how do you add that again?

I added a child game object and then disabled them both. Didnt show up

[viral sonnet]

there's a LEG authoring mb

[robust scaffold]

LEG pales in comparison to the absolute waste of space that is the PCKEP

[viral sonnet]

i mean, this problem here is salvageable very easily. the cap puts a bit of a damper into it but i'm often coming back to the idea of parallel chunks. (as unity isn't keen on making chunks bigger or modular) anything physics or transform related has huge data implications but often isn't accessed that frequently or none at all from game mechanics. however, moving them to a seperate entity would require random acess and i have tried it more than enough times with different methods, it's a hassle and slows everything down with the amount of random access required. if you would have a parallel chunk the you could directly access this would be much faster, i just haven't found a good way to do this yet.

[robust scaffold]

I think this is what Physics Render Entity is doing:

[viral sonnet]

I'll take a look at it. seems interesting

[robust scaffold]

Wait no, it's for physics shape authoring. Primarily the compound mesh authoring

• A new CompoundCollider.Child.Entity field is automatically populated through the conversion system, to point at the converted Entity associated with the GameObject that contacted the PhysicsShapeAuthoring component.
  * This default setting can be overriden by adding a PhysicsRenderEntity component data. The common use case for this is where no MeshRenderer component is on the converted child Entity, and it is desirable to redirect to another Entity with a graphical representation in a different branch of the hierarchy.
  • Added a PhysicsRenderEntity component data. This is primarily used for populating a CompoundCollider.Child.Entity field where there was no graphical representation on the same GameObject that has a PhysicsShapeAuthoring component.

[viral sonnet]

anyway, if you go below 32 entities per chunk the job overhead really eats into it

mainly the small iteration count and GetNativeArray

[robust scaffold]

Well, what can I do. The only custom components on that list is 20 bytes of light rendering data. I cant remove that.

[viral sonnet]

yeah not much you can do other than editing the physics package and lower the buffer capacity

[robust scaffold]

Im sure if I spend several hours / days / weeks slowly combing over the physics package manually and instituting 2D components, I can half the component byte utilization.

But for now, I just want things to work. Optimization hopefully whenever 1.0 enters pre-release in december

[viral sonnet]

unity should do the same thing that I did and make a config struct that has constants to define the InternalBufferCapacity. hardcoding this is just bad practice

[brave field]

Is that possible to create child entity and add component to child entity at custom baking system?

[viral sonnet]

yes, it's even possible in a baker

[brave field]

🥲 I just tried it it's not possible. Child entity never create

I mean custom baking system using [WorldSystemFilter(WorldSystemFilterFlags.BakingSystem)]. Not Baker<xxx>

[viral sonnet]

yeah you're right. not working for me either. it does work though in a Baker

very odd, baking systems should have all the same freedom. did anyone have a baking system that can successfully create entities or childs?

[solemn hollow]

accoriding to docs only CreateAdditionalEntity should work.

[solemn hollow]

Docs say :
"Baking systems are updated on every single Baking pass."

does that mean all entities are getting rebaked every time? or is there some mechanism to ensure that only entities that had their data changed are present in the baking world?

[solemn hollow]

Oh man i just found out the baker keeps its internal state even between entering and exiting playmode. I somehow assumed each bake would have its own baker instance. instead they all share the same baker.

[rustic rain]

yeah, there's DependOn method for this purpose

to track changes

for live conversion

[solemn hollow]

i used state inside the baker to aggregate a list of distinct components to add to avoid the error of adding the same component multiple times from one baker.
This list of components is different for each entity i bake.
So imagine my surprise when all entities came out the same way except for some of the early baked ones ^^

[frosty siren]

what Chunk.DidOrderChange do?

docs says: Reports whether a structural change has occured in this chunk since the specified version.

does it mean Creating/Destroying/Moving entities?

[viral sonnet]

yes

[frosty siren]

and no matter what happened with values

[viral sonnet]

yep

[frosty siren]

looks handy

by the way is there a way to check DidChange for chunk components?

[rustic rain]

try to take a look at source of SetComponentData

if there is version checking for it

it will write to it

during RW operation

[frosty siren]

@viral sonnet i remember some time ago you were linking guide about creating custom parallel native container on an example of parallel sum. Do you have a link, i'm struggling to find it through google

found it https://docs.unity3d.com/Packages/com.unity.collections@2.1/manual/jobs/custom_job_types.html

[viral sonnet]

ah yeah that's it. the safety implementation is outdated though.

[spice vale]

is class based IBufferElementData possible?

[rustic rain]

why not just make class with List then?

[spice vale]

just wondering

I bet the baking won't track changes in a list but might do it for Dynamic buffers

[rustic rain]

hmm

there's a semi unmanaged solution to this

store index to some collection instead

[spice vale]

There are so many pitfalls with baking I feel like, what works what doesn't? Apparently "AddComponent" in a baker doesn't add the component if it was removed during runtime.

[rustic rain]

are you talking about live baking?

[spice vale]

yes

I just want my runtime system to rerun once the baker runs, but it seems impossible.

the component is never added, so my runtime system doesn't run again.

[rustic rain]

you mean you add comp in baker which gets removed in runtime, and then component is not readded if you modify it?

[spice vale]

yes

baker runs, but no comp added

[rustic rain]

try add DependOn

if you haven't yet

[spice vale]

DependOn what?

[rustic rain]

it's a method

in baker

according to manual

it's a way to track changes

[spice vale]

yes ik, but what should it depend on

The issue is not making the baker run, the issue is the comp is not added.

even though the method is named "AddComponent"

[rustic rain]

does your baker even run then?

with changes

have you checked?

[spice vale]

yes

I debug.log in Bake

[rustic rain]

🤔

[spice vale]

I think they assume something like: "Oh this comp is not present on the target anymore, I bet he doesn't want to add it anymore, lets skip it"

[frosty siren]

where can i read of or how can i figure out what is outdated in this tutorial?

all works though

[solemn hollow]

did you try with a baking system?

[spice vale]

inside baking system the component is indeed added, but that change is not propagated to the runtime world.

And as far as I can tell there is no direct way of accessing the runtime world from the baking system.

[solemn hollow]

and you did use Entitmanager.AddComponent in baking system?

[spice vale]

yes tried that too.

[solemn hollow]

oof thats good to know. ill run into those problems too for sure

[spice vale]

What I'm resorting to now is to never remove the component during runtime, and poll for changes instead. Sucks we cannot take advantage of structural filtering here.

[rustic rain]

🤔

[rustic rain]

you can use change filter

for a quick fix

[spice vale]

I do, but I still have to poll since change filter gives false positives.

Random thought: now that we have enabled components, I wonder if it would be feasible to do change filter per entity with same bitmask logic.

[whole gyro]

Do you mean enabling a component temporarily every time you modify a component?

I suppose you could create an aspect that hides the enabled component as an implementation detail:

[Serializable]
public struct MyData : IComponentData
{
    public float3 Value;
}

[Serializable]
public struct Changed : IComponentData, IEnableableComponent { }

readonly partial struct MyDataAspect : IAspect
{
    private readonly RefRW<MyData> _myData;
    private readonly EnabledRefRW<Changed> _changed;

    public MyData MyData
    {
        get => _myData.ValueRO;
        set
        {
            _myData.ValueRW = value;
            _changed.ValueRW = true;
        }
    }

    public bool DidChange
    {
        get => _changed.ValueRO;
    }
}

Then you could have a separate system that disables the changed component at the end of the frame. You could even query for changed components by including the Changed comp in the query.

[spice vale]

Oh interesting, I didn't realize we could do this ourselves with aspects. That seems pretty useful. Probably could even use the same system that is setting the values for resetting the changed bit.

Actually do we even need the tag? can't we reuse the component for enabling?

[whole gyro]

Yeah, assuming that is the only system that cares about the changed bit

[urban ore]

So here's an odd collections question - Many of the native collections use [NativeSetThreadIndex] and m_ThreadIndex to have things write into different buffers. From a bit of testing and searching online, this value is 1-indexed. That is, I get 1-32 for my 16c/32t. That's great, presuming 0 is for the main thread, and the collections seem to operate under that assumption. But I've noticed that most of the allocations made in the native collections use JobsUtility.MaxJobThreadCount (=128) when allocating. Doesn't that leave the collection logically 1 entry short? Or are there actually only 127 jobs allowed? Or can index 0 actually be used by a jobs thread in some scenario?

[whole gyro]

Not sure. I haven't actually used aspects yet, but I remember someone saying that they couldn't have an EnabledRefRW and a RefRW for the same component in the same aspect

It also depends on how you want your queries to work. If you combine MyData and Changed into a single component, normal queries for the data won't return unchanged entities. You would have to remember to use the IgnoreEnabledBits option in your query.

By separating them into two components. Systems that don't care about changed bits can just query for MyData. And those that do can query for MyData AND Changed. So for a more flexible and less error-prone workflow, I would keep them separated. But it really depends on the use case I think.

[spice vale]

true

[spice vale]

Not sure about that one, but my guess is that there is max 127 threads and +1 for main thread.

[urban ore]

I did find a unit test somewhere that ranges to MaxJobThreadCount-1, so I guess that must be it!

[gusty comet]

Is one usecase for sharedcomponentdata to make ComponentLookup less likely to experience cache missed? I have a StatComponent that may have tens of thousands of entities with it, and many systems like StatAdd, StatSubtract, etc. each one of these “operation systems” always reference three entities - A, B, and Output, and it’s highly likely that those 3 entities will only ever be used by one of StatAdd, StatSubtract, etc. so if I attach a sharedcomponentdata called UsedByStatAdd, then all StatComponents that will be used by StatAdd will be grouped together. That way when the StatAdd job executes and uses the ComponentLookup for StatComponent, the relevant statcomponents will be highly likely to be grouped together in the same chunk

[whole gyro]

Do the three entities have the same archetype?

[gusty comet]

They do without using the sharedcomponentdata scheme

The Stat entities have just StatComponent

The Operation entities have 3 component, each one just having one field referencing a Stat entity

The Opertaion job will do a component lookup and write to the 2 input Stats and 1 output Stat, respectively

I know it sounds convoluted/overkill, but I’m only interested in if sharedcomponentdata could’ve used to group entities together in a cache friendly way

[whole gyro]

I'm not sure if there is any value in using an empty shared component over simply using a tag component

[gusty comet]

Oh no, I’ll assign the sharedcomponent a single integer

1 means used by adder, 2 means used by subtractor

This can be extended further if needed

[whole gyro]

I honestly have never had to use shared components, but I'm pretty sure different shared component values (yes even just changing the integer inside) will mean different chunks.

So it effectively is the same as a tag in that each chunk will only have the entities with that specific shared comp value

[gusty comet]

Yes, I want that to happen to group all Adder-used Stats into one chunk, and all Scaler-used Stats into another

[whole gyro]

So why not use a UsedByAdd tag? Just seems simpler than a shared comp

[gusty comet]

Right, but I want a generalized way of doing this for my use case. You’re right about the component tags, but I’d have to create a new one for each partition. With a SharedComponentData I just inject an integer

Again, there’s not just Stat, but also DecisionMaker and a bunch of others that could benefit from this

So a single UsedBy shared component to be useful across different domains

[viral sonnet]

that's nice but honestly changes very little. a chunk can be skipped with change filters and for a chunk where some comps are disabked you still have to iterate over the enabled bits. a reinterpreted bool comp will be just as fast and has much nicer code

[whole gyro]

Got it. I'd probably still just create all the tag components, but I understand that it is extra work. From my own experience, I've found that simple verbose solutions are better than complex generic ones in DOTS. But yeah, shared comp will probably work for what you're trying to do. I've actually never had to use them in my own project so not sure if there are other gotchas with them.

[whole gyro]

You only have to iterate over the enabled bits in IJobChunk. Maybe I'm a minority but I mostly use IJobEntity which does that all automagically (actually I mostly use Entities.ForEach in SystemBase but I'm slowly migrating). I know enabled comps are basically equivalent to a bool comp, but being able to write the code as if its a tag component without paying the cost of a structural change is really nice imo

[rustic rain]

I don't quite get what it does

[robust scaffold]

@proud jackal Dont know if you still read discord but if you can, please put in a word over at the documentation team to fix this small code snippet: https://docs.unity3d.com/2023.1/Documentation/ScriptReference/Unity.Collections.LowLevel.Unsafe.UnsafeUtility.MemCpyStride.html
The third line in the for loop should be source += sourceStride, not destination.

[whole gyro]

In writing systems, you use the MyDataAspect to write changes. Internally, this also enables the Changed comp on the entity. Then in reading systems, you can query for changed values by querying for MyData and Changed. Or if you don't care about changes, you can just query for MyData.

So its just a nice way to do change filtering per-entity without any false positives.

[rustic rain]

🤔

[whole gyro]

Here is some sample usage code using the idiomatic foreach.

// Write new values:
foreach (MyDataAspect dataAspect in SystemAPI.Query<MyDataAspect>())
{
    dataAspect.MyData = new MyData { Value = float3.zero };
}

// Iterate only changed values
foreach (MyDataAspect dataAspect in SystemAPI.Query<MyDataAspect>().WithAll<Changed>())
{
    // ...
}

// Iterate only unchanged values
foreach (MyDataAspect dataAspect in SystemAPI.Query<MyDataAspect>().WithNone<Changed>())
{
    // ...
}

// Iterate all values
foreach (MyDataAspect dataAspect in SystemAPI.Query<MyDataAspect>()
        .WithEntityQueryOptions(EntityQueryOptions.IgnoreComponentEnabledState))
{
    // ...
}
        
// Alternate way to iterate all values.
// By not going through the aspect, we don't have to ignore the disabled Changed
// component since it isn't in the query.
foreach (MyData data in SystemAPI.Query<MyData>())
{
    // ...
}

[robust scaffold]

Is there a way to access aspects in IJC?

[ripe parrot]

At what point does DOTS become a requirement for entities? Could you remake Vampire Survivors without DOTS for example, or would that amount of entities on the screen at once always require it?

[robust scaffold]

DOTS is never required. If you're willing to take the low road, you're completely free to write your own procedural rendering pipeline to render a lot of meshes on screen.

It's honestly not that hard either IMO.

I just use DOTS because I'm lazy.

[ripe parrot]

I'm not trying to stay away from DOTS, just wondering where the line is drawn between 'I should use DOTS for this' and 'I shouldn't bother'.

Unless that line doesn't exist at all 🙂

[rustic rain]

why would anyone not use DOTS?

[robust scaffold]

Ehhhhhh, it's a frame of mind. DOTS is never required for anything.

[ripe parrot]

That's what I'm saying with the line maybe not existing.

I'm still just looking into it now -- "Why would anyone not use DOTS" sort of tells me what I want to know ;p.

[robust scaffold]

One reason to not use DOTS is that most of the tutorials out there are complete garbage at best, completely harmful at worst.

And it's impossible to tell the difference unless you already know what DOTS / ECS coding is and dont need to tutorials.

[ripe parrot]

What are people waiting for? Figured there'd be a bunch of half decent tutorials with how slow the release has rolled out. I thought it's been in the making for quite a while with another update recently(?)

[rustic rain]

ECS is just brand other way of coding, which most people don't get

[robust scaffold]

Experimental 1.0 released earlier last month. That's practically yesterday in the world of DOTS release schedule.

[rustic rain]

everything else is already part of Unity in a way

several classic components were remade with burst and jobs

[viral sonnet]

Vampire Survivors is made in Phaser. Not an engine that's known for blazing fast processing. The game works for the most part so it will even work without DOTS in Unity.

[ripe parrot]

I've seen VS clones without DOTS whatsoever, so I'm quite sure its good enough. I'm quite interested in DOTS though and I hope there's better training infrastructure in the future.

[viral sonnet]

It really is, at least it's much nicer and easier to write than anything involving change filters.

[viral sonnet]

so what's your question then? 🙂

[naive eagle]

Hiya. Any tips on how to let a component know of its children? I'm working on a ship multiplayer game and would like to rotate all of its cannons according to user input. The input is in the form of DynamicBuffer<ShipInput> which is placed on the root Ship object.

[robust scaffold]

Perhaps instead add a tag component (IComponentData with no properties) that indicates which cannons are controlled by user input. Then use that tag as a RO WithAll query when applying user input.

[robust scaffold]

[BurstCompile]
[WithAll(typeof(PlayerControlledTag))]
private partial struct ApplyInputs : IJobEntity
{
    public float2 RawAxis;
    public float  Speed;

    [BurstCompile]
    private void Execute(ref PhysicsVelocity velocity)
    {
        velocity.Linear.xy += RawAxis * Speed;
    }
}``` Here's an IJE version of my input job.

[naive eagle]

That's an idea but that too requires me to be able to differentiate the user's cannons from other users' cannon in order to add that tag, right? I know which root is controlled by the user, but I'd need to know which cannons belong to that root.

[robust scaffold]

That's where SharedComponentData come into play. Use a shared component filter then.

Assign each cannon a ISCD with a property index indicating which player that cannon is controlled by. Then use the SCD value within the job to access an array of relevant input controls for that frame to change the direction of the cannon.

[naive eagle]

Okay thanks! I'll look into SharedComponentData

[viral sonnet]

what's not accounted for here is the query overhead which can be quite large. maybe i'll get around to profile all the different options available to us now

[robust scaffold]

Well, it is literally pulling ICDs from entities.

[viral sonnet]

that's really simplifying it. the query iterates over fitting archetypes and creates a list of valid chunks. then each chunk is checked for the state. this could be all merged into 1 loop instead without any information lost.

[robust scaffold]

// Pointer to velocity values.
void* vel = chunk.GetRequiredComponentDataPtrRW(ref Velocity);

// Shift pointer to access velocity.linear.z.
float* linear = (float*)vel + 2;

// Mem-copy zero out all Z linear velocities.
UnsafeUtility.MemCpyStride(linear, sizeof(PhysicsVelocity), &zCl,
    0, sizeof(int), chunk.Count);

// Fixed float2 zero value.
float2 xyC = float2.zero;

// Shift pointer to access velocity.angular.
float* angular = (float*)vel + 3;

// Mem-copy zero out all XY angular velocities.
UnsafeUtility.MemCpyStride(angular, sizeof(PhysicsVelocity), &xyC,
    0, sizeof(float2), chunk.Count);``` I am shocked this works.

[rustic rain]

just, why?

[robust scaffold]

Because ultra optimization enforcing 2D physics using DOTS 3D physics.

[rustic rain]

oh

is that system

to set 3rd axis to 0?

[robust scaffold]

Yea, it's this: https://forum.unity.com/threads/dots-physics-for-2d-games-apply-constraint-on-z-axis.790859/#post-5286492

[rustic rain]

mind sharing whole system?

[robust scaffold]

Im sure if I dug into ToEuler I can optimize constraining rotation to Z axis only but eh.

[whole gyro]

Not sure I follow. How is this any worse than a component with a bool? Don't you still need to query for chunks with that component and then iterate the chunk and check the bool? Is the overhead from querying for two components instead of one?

[naive eagle]

Do you have an idea of how to figure out which player that cannon is controlled by? I did find the Parent component which I could use to traverse the hierarchy but I wonder if there's a better way to set up this relationship.

My first idea was to set it up during baking, but the network id ofc isn't available then yet. Maybe I could pass a reference to the Ship to the Cannons during baking, though 🤔

[robust scaffold]

Ideally, your entire hierarchy will be flat. No parents and no children. Baking probably wont work, you will need to do runtime authoring.

Spawn the player and all entities related to it at bake and on network connect during runtime you spawn the entities related to other players.

This is where Subscenes will probably help. Make a generic "player" subscene containing bare minimum entities required to make a player function. Then spawn that repeatedly for every network connection then populate per instance properties and classes later.

[remote crater]

Hey if I wanted to change the Mesh of an Entity, how do I do that? I can't find my question from the other day.

[rotund token]

i believe you're talking 0.51?

[remote crater]

sure

[rotund token]

it's changed a lot in 1.0

[remote crater]

I hear 1.0 isn't working for a lot of people. I'll wait til it works to upgrade.

[rotund token]

just set RenderMesh

[remote crater]

Thank you

[rotund token]

how so?

[remote crater]

Its a conglomerate of information sources I use.

Don't worry about it, I judge my upgrade times based on if the steps of upgrading is easy or hard.

When they become very hard to upgrade one step,I just park on an old tech and wait til there is a feature I'm missing. A long jump later is shorter than many long jumps before.

[rotund token]

1.0 is a long jump for an existing product

[remote crater]

Its just general software engineer stuff, would have saved about 400 hrs dev time if I just stayed on 2021.5.f1 instead of going 2021.11.f1. upgrading for the sake of upgrading ain't always good

[rotund token]

we won't be upgrading at work

[remote crater]

Exactly

[rotund token]

but it is nice to finally be on what should be a reasonably stable api going forward finally

[remote crater]

True that!

[remote crater]

Unity people do Unity people stuff. We plebs would have liked to have smaller manageable jumps, but we understand if they gotta burn the house down to make a new foundation.

[rotund token]

haven't programmed in 6 days

time to go see what broken state i left things in =\

[remote crater]

Many young software engineers are learning the lesson of it not being bad stuck on legacy techs. I learned my lesson of relying on Unity releases to be stable.

[remote crater]

Let me give you wisdom for that...

If you want to fly, you don't start.

If you want to run, you're disappointed if you can't.

If you want to walk, that isn't for sure either.

Start every session with the mentaily,"Let me grunt pick and shovel this."

If you do that, you'll be flying and running more often than you'd think.

Tell yourself,"The thing I like doing the most is organizing my design documents."

[rotund token]

design documents? 😄

[remote crater]

And you'll stumble over stuff you want to implement.

TODO/NOTEs

Between starting every day with grunt coder attitude and saying your passtime is organizing todo lists and design docs... You'll get more timeclocked

Ok, good talking with you, back to grind, gonna have an AWESOME release this Friday

Putting in anime boys

who give a MADlib about their backstory noone cares about

before they attack

randomized madlib anime backstory

Should be in within a few hours

but need more enemies, random loot boxes dropped and a inventory system of some sort by Fri

[robust scaffold]

Does anyone know the setting to change how unity names duplicated GOs? from (1) to _1 or something?

[rustic rain]

should be in either preferences or project settings

use search by keywords

[robust scaffold]

I know it exists but my googlefu is lacking

[rustic rain]

search in editor...

[rotund token]

it's under project settings

editor

[robust scaffold]

Ah, hrm. Doesnt seem to be working for me? Duplicating a GO inside a subscene doesnt increment the (X).

[whole gyro]

huh yeah same for me

[robust scaffold]

It does so outside a subscene but not within it. Huh.

[viral sonnet]

damn, i tested LEG and physics keypair with optimized cap bringing the chunk capacity from 17 to 29. my machine has way too many threads to see anything noticeable ... 😅

[rustic rain]

a bit curious, why you modify translation?

without velocity it won't ever change

I use Z value for depth

same for rotation

[robust scaffold]

Good point. Im thinking about using z for layering. Just comment it out. I commented rotation out due to how expensive it is already.

[rustic rain]

I'v been doing same thing

without modifying anything but velocity

it worked out great, no glitches related to 3rd axis at all

your approach is just way faster it seems 😅

[robust scaffold]

I've been chucking it against spheres and other objects. Just enforcing 2D on PhysicsVelocity seems to work okay.

[viral sonnet]

and i have no idea to get my performance tests working in 1.0 because it relied on runtime conversion. the lack of entities related performance tests is really bugging me.

[rustic rain]

welp, now this system is just 50 lines long 😅

[robust scaffold]

I'm keeping it in there just in case but yea.

[rustic rain]

can also reduce 5 lines

by using SystemAPI.QueryBuilder

[robust scaffold]

querybuilder is doing what I'm doing anyways. So eh

[rustic rain]

but it's just less boiler plate

if it wasn't for type handle

could leave OnCreate empty

[robust scaffold]

Yea. I really hope unity will make a codegen for type handle and updating. Would be incredible.

[robust scaffold]

Hrm. Seems like collisions against mesh plane colliders result in an introduction of 3D force values.

[rustic rain]

You mean smth affects z value during physics step?

[robust scaffold]

Yea. I use CreateMesh() from a composite collider 2D of a tilemap collider and feed that into a physics shape mesh.

[rustic rain]

In that case...

[robust scaffold]

Sliding a box collider along the surface of it works for a while until it somehow decides to roll over it.

[rustic rain]

Should make a system

That modified world during step

Doing same thing - nullifying z value

[robust scaffold]

Enforcing 0 z axis fixes the rollover. No need for rotational setting so that's good.

[rustic rain]

You mean translation?
I'd want to avoid that

[robust scaffold]

Yea. Either that or the expensive XY rotation constraint.

[rustic rain]

Hold up

Have you considered physics step modification?

[robust scaffold]

Infinite inertial dampers? I mean, that could work.

[rustic rain]

Before it's data written to entities

[rustic rain]

That's not what I had in mind 😅

I mean modifying translation inside physics world

[robust scaffold]

This is what it's doing. I think

[rustic rain]

Point is to do it before data is written to chunks

Also should be way faster

Since it's all giant array

Vs chunks

[robust scaffold]

I havent really dug into what's going on in there. Give me a minute to see if I can find it

[rustic rain]

Just look at physics world

[robust scaffold]

ugh, that is pain

To modify that, we would need to write our own ExportPhysicsWorld.

[robust scaffold]

Huh, anyone else having a build issue where any level of managed stripping above None for Mono result in companion GOs not having their transforms changed?

Scene 700485ca34f7b45488702c50add65ebf - Data length mismatch: Dependencies: 39, Types: 41, Paths: 39. I think it might have to do something with this error?

[viral sonnet]

well, this focused test on PhysicsColliderKeyEntityPair turned out more interesting than I thought. just look at this alone. the left part has a cap of 16, the right part after the huge init spike runs on internal cap 0

the same job for a heavy object (57 chunk cap) takes 11.4ms, the other light object (99 chunk cap) 3.01ms. i have no clue what's going on right now. seems a bit too extreme

i should take out physics of this test. on that note, i can't get a static physic object to not run any CreateRigidBodies jobs. all frames are full of it which shouldn't be the case. all are spawned on the same position so maybe that's the problem

[rotund token]

spawning a lot of things on the same place in physics goes poorly

[deft pilot]

if the goal is to add alot of elements to alot of entities

whats the goto to do that

otherwise it would just freeze on that frame

ie/need to add 2000~ elements to n * m entities at the start of the game

where n / m is anywhere between 1~50 so we could be talking about 2500 entities with 2000 elements each which is 2500 * 2000 elements

[rotund token]

entityquery variation is very fast at this

because it can work at chunk level

[deft pilot]

how does entity query help me add elements?

[rotund token]

oh sorry by elements i thought you meant components

[deft pilot]

buffer elements i should say yeah

[rotund token]

do they already have the buffer? can't you just do it in a parallel job

[deft pilot]

they already have the buffer

wait you can modify buffers in a job?

[rotund token]

5 mill elements would only be 2 digit MS

yes

[deft pilot]

-facepalm what

[rotund token]

DynamicBuffers work fine in jobs

[deft pilot]

i thought you could only do value type calculations

okay

[viral sonnet]

they are 3 units apart now. doesn't change anything. 🤔

[dense oriole]

I'd love to have TilemapCollider2D working with Dots Physics -- any idea how to do it? how to create a collider mesh like that?
currently I'm reading through https://github.com/Unity-Technologies/UnityCsReference/blob/d76ca0c1f57f36891cb231ed36e80a795d9244d2/Modules/Tilemap/ScriptBindings/Tilemap.bindings.cs
can all these external thingies be found somehow?

[robust scaffold]

You're in luck. I'm doing that right now.

[robust scaffold]

Im using a composite collider 2D that generates a polygon mesh to be used in a PhysicsShape custom mesh.

GCMA is real simple, just calling CreateMesh and saving it as an asset:

From there, I constrain movement in the world to 2D and it works.

Runtime changes to tilemaps though are still an unsolved problem. So eh

[ripe parrot]

Sorry for the late reply, but I was trying to figure out if there was a hard line to look for when transitioning a project to DOTS based architecture.

I didn't mean I know it's possible based on seeing VS clones because I actually assumed they were leaving a lot out (that may require DOTS).

I think I got my answer though in that DOTS wouldn't be required for this project and that there is not necessarily any one scenario where you should not use DOTS, let alone a scenario where you should.

[viral sonnet]

removed the wall of images. thread here: https://forum.unity.com/threads/hierarchy-data-as-core-feature.1350353/#post-8526518 feel free to raise your voice or opinion

[tropic venture]

https://assetstore.unity.com/packages/tools/physics/rival-dots-character-controller-for-unity-225129

I see a new release of Rival Character Controller has occurred - any idea if it's ECS 1.0 compatible now?

[mild ledge]

"Changes:

Removed unsafe requirement in Standard Characters" doesnt seem like it

[dense oriole]

thanks! ❤️

[dense oriole]

hmm, it seems it's placed in a subscene or with a convert to entity component -- how do you get the tilemap to render in DOTS tho? I'm using DOTS 1.0 if that matters

[long adder]

I encountered a problem. I got the behavior tree variable of AI in the game and could be accessed, but it could not be modified.
Why is this? Is there any way to modify it, thank you

[spice vale]

Am I missing something or, when we use the idiomatic foreach, we can't actually set the component we are iterating over?

[rustic rain]

you can

[dense storm]

Is a System's update framerate independent like fixed update?

[rustic rain]

use RefRW<T>

or smth like that

[spice vale]

Oh, right

[rustic rain]

update is called by system group

[spice vale]

But that doesn't work for managed comp

[rustic rain]

🤔

why do you need ref for managed comp?

[spice vale]

must be non-nullable

I want to set it. 🙂

[rustic rain]

but it's already reference

just set it

[spice vale]

it becomes angry at me Cannot assign to 'instance' because it is a 'foreach iteration variable'

[rustic rain]

mind showing code?

[dense storm]

Ok just finished reading about [UpdateInGroup(typeof(FixedStepSimulationSystemGroup))] thanks!

[spice vale]

            foreach (var instance in SystemAPI.Query<CompanionGOInstance>())
            {
                instance = CreateNewInstance(); <- Compile error here
            }

[rustic rain]

well yeah

you are supposed to modify instance instead

[spice vale]

That works but it's annoying.

            {
                var newInstance = CreateNewInstance();
                instance.a = newInstance.a;
                instance.b = newInstance.b;
                instance.c = newInstance.c;
                instance.d = newInstance.d;
            }

[rustic rain]

🤔

[dense storm]

I am using BaseUnit : MonoBehaviour in a system.

Entities.ForEach((Entity e, BaseUnit unit) =>
{
  unit.SomeUnitMethod();
}

Can I make it query Hero : BaseUnit as well? or even Interface?

[rustic rain]

ForEach is obsolete

[dense storm]

This the new one?

foreach (var (rotateAspect, speedModifierRef) in
                SystemAPI.Query<RotateAspect, RefRO<SpeedModifier>>())

[rotund token]

that or IJobEntity

since they kind of do different things

[dense storm]

            foreach (var (e, transform) in 
                SystemAPI.Query<Entity, RefRO<WorldToLocalTransform>>())
                {
                    
                }

How do I ref entity?

Gets error

[rotund token]

add WithEntity or something at end

[rustic rain]

WithEntityAccess()

[rotund token]

yeah that one

[dense storm]

            foreach (var (transform, e) in 
                SystemAPI.Query<TransformAspect>()
                .WithEntityAccess())
                {
                    
                }

It ends up way uglier than Entities.Foreach

[brave field]

👀 Actually it's so much better than Entities.Foreach

[rustic rain]

can't agree

yeah, query is way cleaner

[brave field]

It's damn lag when using Entities.Foreach lol

Not to mention need to create bullshit local var just to pass into Entities.Foreach

[spice vale]

I like this formatting:

foreach (var (transform, e) in SystemAPI
  .Query<TransformAspect>()
  .WithEntityAccess())
{

}

[dense storm]

Ah yes that's better

var queries = SystemAPI.Query<TransformAspect>().WithEntityAccess();

foreach (var (transform, e) in queries)
{
  // Do Stuff
}

How do I tell it not to run with burst, and what about Run/Schedule/ScheduleParallel?

[rustic rain]

it's not running with burst

[rotund token]

it's main thread only

[dense storm]

oo

[rotund token]

it's not a job

it will run in burst if you have it in a bursted ISystem

but it's still main thread

[rotund token]

^

think of it as a replacement for EFE.Run

[brave field]

🥲 Now I only realize that dun have .WithoutBurst() like Entities.ForEach

[rotund token]

EFE.Schedules should be replaced by IJobEntity

[rotund token]

because it's never using burst unless your system is

it's always withoutburst

[dense storm]

Okay I see

[brave field]

Then how to debug it without burst just like Entities.ForEach?

[dense storm]

So jobs still the same syntax :)

[rotund token]

there never is burst

you can't turn burst off if burst isn't running

[brave field]

I mean with Entities.ForEach u can put .WithoutBurst to make the code at Entities.ForEach not burst compiled to debug

[rotund token]

foreach (var (transform, e) in SystemAPI.Query<TransformAspect>().WithEntityAccess()) { }

Entitys.ForEach((Entity, in TransformAspect) => { }).WithoutBurst().Run()

these are the same thing in SystemBase

[brave field]

but now with idiomatic foreach u can't do tat anymore

[rustic rain]

🥴

[rotund token]

there is no burst

[dense storm]

var queries = SystemAPI.Query<ManagedType>().WithEntityAccess();

foreach (var (managedType, e) in queries)
{
  managedType.SomeMethod();
}

I can't query a monobehaviour with this

[rotund token]

SystemAPI.ManagedAPI is coming next release i believe

[brave field]

🥲 I see. Now become like usual foreach but from wat I see I guess official still can do it if they want

[brave field]

query managed component they still working on it I think

[dense storm]

Gave me an error

Can't convert ManagedType to IQuery something

Welp, Entities.Foreach for now

[spice vale]

Its working for me to query managed comps

[dense storm]

What ok, I'll try again tomorrow

[brave field]

Oh so only query classic unity component like Monobehavior cannot work?

[spice vale]

or wait, maybe it doesn't work for monos

I have only tested with class IComponentData

[rotund token]

yeah it might only work for that

[dense storm]

Yes it was a MonoB

It still works with Entities.ForEach

[brave field]

🥲 I just upgrade my production project to able to enter play mode state but there's still lots of runtime errors need to fix

[dense storm]

Where can I read about this?

[rotund token]

just randomly in this channel

for example
#archived-dots message

[rustic rain]

just use EntityManager.GetComponentObject for now

[proud jackal]

Indeed, and that's mostly what SystemAPI.ManagedAPI uses underthehood anyways! 😆

[brave field]

@proud jackal 🥲 Can u make sure next version fix this issue? Entities Hierarchy is completely broken at my side

[spice vale]

I can't clear them fast enough 💀 https://i.gyazo.com/7f42ae5d93c5a60c8b35b5f5460041e8.mp4

[proud jackal]

Also, I don't think this is a supported usecase to type a query inside a variable.. Pretty sure we give an error?

[frosty siren]

what is alignment in UnsafeUtility.Malloc method?

[spice vale]

https://en.wikipedia.org/wiki/Data_structure_alignment

[brave field]

Need to put SystemAPI.Query<> inside foreach?

[spice vale]

essentially alignment of 1 means allocation can happen anywhere, alignment of 4 means it can happen only at addresses divisible by 4, and so on. Computers can read and write data faster if it is aligned correctly. An int for example wants and alignment of 4. UnsafeUtility.AlignOf<T>() can check what the alignment is for your type.

[frosty siren]

thank you, yeah, i need this UnsafeUtility.AlignOf<T>()

[rustic rain]

yeah

this API is codegen

what you do is basically just give hints to code generators made by Unity to generate correct code

[proud jackal]

Indeed,.. oh Issue got it way before me 😂

[rustic rain]

we really need some tutorial or explanation how to make our own very simple implementation of this

[brave field]

For idiomatic foreach, is there any plan to bring back .WithoutBurst() and .WithStructuralChanges and .WithName("Foo") Entities.ForEach equivalent? I guess those are method builder or something? I forget the formal naming of it. Btw have u see the Entites Hierarchy window issue I posted above?

[rustic rain]

smth that caches field in OnCreate and uses it in OnUpdate

[proud jackal]

No plans, WithoutBurst is already a thing since bursting is only happening if the containing function is bursted e.g. OnUpdate with [BurstCompile] on top. And .WithStructuralChange is currently meant to be ECBs instead until we figure something better out :3

And yeah, posted it to the UI folk :3

[brave field]

🥲 I see. So now really become real foreach. I guess now only left ECB.AddComponentObject() api for classic unity components like MonoBehavior

[brave field]

I think FixedString64Bytes is not enough. Need to increase more to like System windows. Maybe it's caused by system name too long?

[winter depot]

I'm not sure if here or in graphics, but currently I am disabling hybrid rendering on entities by adding and removing <Prefab>. Is there a more efficient way to be doing this?

[viral sonnet]

yes, Disabled comp. you should not remove or add prefabs for no good reason.

[dense storm]

I haven't tried running it, but VS2022 doesn't give me errors

But why disable it? It looks way neater & readable in a variable.

And is actually in line with the usual foreach usage. Create a list, then iterate on it. Rather than creating the list in the for loop declaration.

[proud jackal]

I mean, not wrong, but we didn't want to open that can just yet (the more we initially restrict it, the better support we can make sure to give once we open the can)

That said, it shouldn't really be thought of as creating a list, more so retrieving one, as most of it is cached and not created :3

[dense storm]

I see, that's cool, thanks!

[winter depot]

Which component are you refering to out of the components that RenderMeshUtility.AddComponents adds

[viral sonnet]

    /// Disables the entity.
    /// </summary>
    /// <remarks> By default, an <see cref="EntityQuery"/> ignores all entities that have this component. You
    /// can override this default behavior by setting the `EntityQueryOptions.IncludeDisabledEntities` flag of the
    /// <see cref="EntityQueryDesc"/> object used to create the query.</remarks>
    /// <seealso cref="EntityManager.IsEnabled(Entity)"/>
    /// <seealso cref="EntityManager.SetEnabled(Entity,bool)"/>
    public struct Disabled : IComponentData
    {
    }``` It's a standard Entities component.

Do you just want to disable rendering?

[winter depot]

Yeah, I guess I could disable entity if I instead dropped them on a child linked entity, but for now its on the primary entity I wanted rendered

[viral sonnet]

hm, I'm not aware of any way to just disable rendering. the query operates on RenderMesh and LocalToWorld, both are not enableable components. maybe someones else has an idea to achieve this without structural changes.

[rustic rain]

DisableRendering

just like Disabled

[viral sonnet]

haha, nice 😄

[winter depot]

Thanks!

Still add/remove, but at least I feel better. Maybe it can be a bitflag one day

[viral sonnet]

yeah, Disabled comps could really profit from the enabled comp feature

[rustic rain]

it is already

just on query level

[brave field]

Anyone know how to fix this android crash? 🥲

lib_burst_generated.Unity.Entities.EntityQueryImpl.GetSingletonChunk(Unity.Entities.EntityQueryImpl* this, Unity.Entities.TypeIndex typeIndex, ref int outIndexInArchetype, ref Unity.Entities.Chunk* outChunk) -> void_af0ee2df0b1e2158fa5c6d394d81afa0 from Unity.Entities, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null(Unity.Entities.EntityQueryImpl.GetSingletonChunk:120)
lib_burst_generated.Unity.Physics.Systems.BroadphaseSystem.OnCreate(Unity.Physics.Systems.BroadphaseSystem* this, ref Unity.Entities.SystemState state) -> void_af0ee2df0b1e2158fa5c6d394d81afa0 from Unity.Physics, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null(Unity.Physics.Systems.BroadphaseSystem.OnCreate:600)

[balmy thistle]

Are you using minimal stripping?

[whole gyro]

I had the same issue and it was indeed from a game object with a long name. Shortening the name fixed it for me.

[brave field]

Not sure later I will check. So for now it's better to change to None?

[rustic rain]

generally yeah

[brave field]

Alright. Currently I'm using Low.

[rustic rain]

try disabling it for now

Entities is experimental after all

[brave field]

🥲 Sadly l have lots of long name. So I can't rename all of them 1 by 1

[balmy thistle]

You could write a script to do it. I'd probably do it textually since you're just talking about manipulating strings but you could also do it in editor.

[brave field]

Oh yeah I realized that it's probably caused by system singleton entity that has long name . I still want to keep the naming. I hope next release official can fix it. For now I guess can I modify the FixedString64 to like FixedString128 to make it larger?

[whole gyro]

If you are gonna modify source, I would just make FixedString64 truncate instead of throwing an error.

[dense oriole]

does anyone know how to deal with NavMeshLinks in DOTS? the characters nicely "jump" to the other navmesh, but I wish them to teleport :p
any clever way to find out when they're traversing a link so I can speed things up?

[winter depot]

I am attempting to instantiate a prefab with a nested linked entity group. My issue is only the linked child of the instantiated prefab is being generated, the children of that prefab which are also linked do not. Is this not possible? Or is this something that the original prefab needs to have each child of child linked manually? Or is it possible and I am making a mistake.

[winter depot]

Looks like adding to the primary prefab entity worked... but this can be a tad tedious. Can this still work nested and I am just making a mistake?

[robust scaffold]

Does anyone know what happened to firstEntityIndex in IJobChunk?

Oh boy, now query.CalculateBaseEntityIndexArrayAsync is required...

[robust scaffold]

Anything above "None" stripping resulted in bugs for my Mono Windows build.

[robust scaffold]

I havent been this confused about DOTS in years. My god is netcode so confusing.

Why are all my ghosts disabled? How do I properly enable them? Why are there a quarter billion components tacked onto everything?

I am so confused. Is this how people look at DOTS starting out? I see why people just give up after spending a few hours on this

[viral sonnet]

hehe, i remember schnozzle showing a screen with 4 or something chunk capacity 😅

[robust scaffold]

Yea, it's around 15 right now. The only custom components is a 20 byte sized light data. The rest are unity physics and netcode components

like god damn, i wish I knew what was going on

[viral sonnet]

i sound like a broken record. 16k chunk size is not enough

i don't know how much has changed in 1.0. the doc was good enough to get me started

[robust scaffold]

The problem is that the docs are very outdated. There's a sample repo updated by unity yesterday that Im using to try and reverse engineer what they're doing

[robust scaffold]

16k is sufficient if the components werent wildly oversized and wasteful.

[viral sonnet]

have you found the get started tutorial?

[robust scaffold]

In the docs? That's still using 0.5X components

[viral sonnet]

hm, yeah i see no upgrade guide for 1.0. that would be helpful when lots has changed

[rotund token]

Oh yeah netcode documentation is lacking

There are a lot of features or helpers that are just unknown because no mention

I think the getting started basic setup kind of works

[robust scaffold]

my ghosts are all spawning in disabled for some reason. They're all enabled on the GO side... ugh

[viral sonnet]

can you post such an archetype?

[rotund token]

How are you trying to spawn them

Just in a subscene?

[robust scaffold]

Yea

[rotund token]

Subscene ghosts are kind of special