archived-dots

[coarse turtle]

Did you try other sorting algorithms?

[frosty siren]

yes, i've implemented few before i've realised that NativeArray.Sort in single job is best, But when you have nested sprites all algorithms can't handle your new rules, because when element is a child, then we can't compare it with other elements, only with other children. This is because child should goes with parent and be sorted only with other children.

[coarse turtle]

oh right I didn't think about children entities

yea probably limiting your sort space might be a good idea? It also sounds like your order value could be a key for radix sort, but I'm not really sure about the children entities rule 🤔

[frosty siren]

i'm thinking about
0. sort by nesting level

1. find where in array nesting level changes (depth groups)
2. sort slice with 0 depth group
3. starting from last depth group to 1 depth group -> sort by parent + position -> find all parents in previous depth group -> insert

2 and 3 can go in parallel until depth group 1 wants to be inserted to 0 group

but this algorithm sounds wild and still has all of this SORTINGS, still looks better then O(n^2) though

[frosty siren]

yes, culling helps, of course, but with my current approach even 500 sprites on screen is a hard work for CPU

[rustic rain]

are those same sprites?

[frosty siren]

no they can be any sprites with same material or not

[rustic rain]

I just wonder whether you actually need that sorting at all, what is the end goal you are trying to accomplish with it? So whatever entity is appears closer to camera?

[frosty siren]

in my system i have "RenderArchetype" with is Shader + Textures. I'm using GPU Instancing and after sorting find batch groups of spirtes which can be rendered together

[frosty siren]

Sprites are 2D entities, they have no depth like 3D objects, i need to manually sort them depending on theirs XY positions and other properties like (sort order + layer). The closest sprite to the camera is sprite with lower Y and greater X in my case.

[rustic rain]

greater X?
Is that 2D or?

[frosty siren]

yes, it is 2D

when we talking about 3D we have depth and can enable ZWrite On, then pixels with tested depth will be overdrawed afaik, so you just render your 3D objects in batches and that's all. But there is no depth in 2D, so we faced that kind of problems. If i'm totally wrong about those things, pls point me, because i'm new to all this stuff 🙂

[rustic rain]

I worked with 2D, but it was actually in 3D, where X and Z were used for position, and Y to render queue

I accomplished rendering a lot of textures (about 40k) with indirect gpu instancing

but those textures were transparent, so I never really had problem with render order

they just kind of multiplied with each other

[frosty siren]

So you write render queue to Y depending on your X and Z value and then use it like depth?

[rustic rain]

Not really.
it was smth like this:
0 - terrain
0.01 - buildings
0.02 - items
0.03 - pawns
0.04 - gas
0.05 - weather
And etc...

layers were predetermined, everything else is figured by engine draw calls

[frosty siren]

ok, how you handle 100 items on screen, what item being rendered first?

[rustic rain]

that's actually impossible mechanically in that game xD
It can only happen for transparent objects basically

[frosty siren]

ok, imagine 100 characters which are moving up down left right on screen, how would you sort them?

[rustic rain]

depending on context, tbh
Is rendering has any gameplay value?

or you just want things to look good?

[frosty siren]

what you mean gameplay value?

[rustic rain]

well, is it relevant for gameplay? Or it's as important as background?

[frosty siren]

it is important for gameplay i guess

[rustic rain]

for gameplay I mean, if it's smth you must shoot, then it does have value

what happens rn tho? Without sorting, how does it look?

[frosty siren]

oh, ok, my game is something like tycoon games, so all player see have gameplay value

[frosty siren]

without sorting it is just mess, some sprites goes first, you can see that one character's feet is on face of another character

[rustic rain]

oh

so, are characters 1 sprite alltogether? or combination of several?

[frosty siren]

combination, that is why i need sorting groups

[rustic rain]

you can do this

wait

[frosty siren]

look and this example i've found in google, here is zombies with proper order rendering + they consist of parts of body

and here we see issues

[rustic rain]

are your character entities are groupped in any way?

if you can assign them to one Y altitude

all entities of character

it will stop mess

at least

[frosty siren]

mmm, yes

• they form hierarchy, like child-parent with Unity.Transforms
• each sprite entity has

public struct SortingGroup : IComponentData
{
  public Entity parentID;
  public int depth;
}

[rustic rain]

ooooh, if your body parts have any sort of "Parent" entity component
You can pretty much just use EntityID as Y axis

and it'll be cut down to just one query through all body parts

[frosty siren]

there is corner case when you have N (N > 1) characters staying on the same Y altitude

[rustic rain]

you don't have same parentIDs tho

just multiply that ID by some very small value

[frosty siren]

i'm sorry, can't figure out an idea

[rustic rain]

so, if you use GameObject prefab

then every child entity knows it's parent entity

they have this component

so you just query through all objects with that entity

and adjust their Y axis (or whatever render order you use) by for example:
EntityID*0.001;

[frosty siren]

ok, imagine two characters stays on same position float3.zero
each character has body, legs, arms and head
we want make legs/arms/head to be children of a body
then we adjust it's Y values to some small value
now they a little bit greater then parent, yes. But how they can be sorted between each other?
also there are legs/arms/head of the second character and they have the same Y adjusted values.
now we will have this picture: bodies of both characters being rendered first, then all other body parts of both characters. It is like with zombies case.

[rustic rain]

you adjust all children by same value of parentid

if you want to also adjust children between each other

you can create more queries

so it then goes through all legs

all bodies

all hands and etc

[frosty siren]

parentID is Entity.Index of parent it is random value in rendering context

[rustic rain]

yeah, it's a bit random

but what is important - it's unique

[frosty siren]

yes, but randomness leads to mess, there will no proper order

[rustic rain]

and by what order you want them to be sorted?

[frosty siren]

we want body1 -> legs1 -> arms1 -> head1 -> body2 -> legs2 -> arms2 -> head2

[rustic rain]

if you want order between children - it's simple and precise

[frosty siren]

depending on bodies positions between each other

[rustic rain]

order between characters is not

[frosty siren]

that is i'm talking about 🙂

[rustic rain]

but how do you want them to be sorted?

by what rule?

[frosty siren]

by position on a screen

[rustic rain]

??? whoever closer to left side of screen is rendered first?

[frosty siren]

like on that screen

[rustic rain]

ah, well

then when you query through children

you need to know their parent's position

not sure if you can make such query in dots tho

it seems like it beats the idea

if you try to access parent's position

while working with children's position

maybe someone else knows a way tho

[frosty siren]

accessing to parent's position gives us nothing because we still need to sort them all together. we even can calculate parent's positions without access to his LTW, because we can just extract local position from world position

[rustic rain]

sorting is simple tho

if you know parent's position while accessing child

you once again, add some value based of X axis of position

in this case you don't even need entitiyID

it's just was ez way to access some unique per character data

[deft stump]

I see some Burst changes in 2022.1.0b3

Burst: Added: Added support for DOTS Runtime running / loading .Net Core assemblies.

Burst: Added: Added support for System.Span and System.ReadOnlySpan within Bursted code. These types are not allowed as entry-point arguments.

Burst: Added: BurstAuthorizedExternalMethodAttribute is now used to mark external functions that are safe to call potentially multiple times from static constructors (pure functions, with no side effects).

[frosty siren]

but how to solve problem with characters with stays on same positions? all children will get the same parent's postition

[rustic rain]

you can keep a bit of randomness from entityID then

[deft stump]

Ooooh so DOTS 1.0 is really on the horizon.
URP: Added: Added minimal picking support for DOTS 1.0 (on parity with Hybrid Renderer V2).

[frosty siren]

like shift parent and children a little bit by parent's Entity.index ?

[rustic rain]

like, biggest value of Y axis comes from X and Z math

while also adding some super small value from entityID

so in case

X and Z of other entity are exact same, your draw order is secured by entityID

[frosty siren]

yeap, but how to calculate this small value

[rustic rain]

just keep it very small

[frosty siren]

i mean 0.00001 * Entity.Index will grow with index

[rustic rain]

it's not really relevant

you can add additional math of keeping it always small

smth like

if (Index > 10000) index / 1000;

[frosty siren]

my brain gets heated. It is still requires sorting children between each other, so i need pack theirs local positions to that small adjustments

[rustic rain]

no it doesn't

just query through additional tags

which also will have some weight

eg:
leg 1
body 2
head 4
hands 3

it's basically a matter of keeping values intact

as you need to have this offset below 0.01

or maybe 0.05

to avoid any visible changes

for camera

[frosty siren]

what you mean by additional tags?

[rustic rain]

Component without values

[frosty siren]

oh, ok. So one tag for one kind of child?

[rustic rain]

yeah, every leg will have some LegTagComponent

or smth like that

[frosty siren]

it will stretch rendering system code to infinity

[rustic rain]

why? it can be done in one system

with just 3 queries

[frosty siren]

because different cases assumes different children set

[rustic rain]

1 query for tags (actually each query for each tag)

1 query for position based offset

[frosty siren]

characters wants body parts, dress, etc. Building wants parts

[rustic rain]

1 query for entityID query

[deft stump]

question is how deep can you go without the rendering system go to infinity

[rustic rain]

well, you'll have tags for all your entities you want to draw

it's not like those tags can't be used for anything else

you can later use them for some kind of game logic

[frosty siren]

yeap, i'm more and more think that there is no perfect solution

[rustic rain]

I don't see why my solution is no perfect xD

fast and efficient

[deft stump]

1 tag for each child

[rustic rain]

each kind of child

basically, body part

[deft stump]

you can have infinity body parts

[frosty siren]

it doesn't scale

[rustic rain]

why not

you can limit it to 1 tag

[deft stump]

so you'll be making infinity tag for infinity body parts

[rustic rain]

and call it

internal offset

and query through this one tag

using internal value

[frosty siren]

i mean for my own project, yes, i can predefine all kinds of children, but for other project 🙂

[rustic rain]

that is assigned whenever you initialise this entity

idk why I didn't think of just offset comp in the first place

[deft stump]

over engineering lmao

[rustic rain]

can't help myself being less close minded kek

[frosty siren]

basically idea of calculation universal sort value depending on position/parent position/parent id is good, but i still try to figure out how to avoid all issues

[rustic rain]

eventually some things are eyes opening anyway

hm

biggest work here would be figuring out numbers

imo

will require tests I guess

while the only issue I can see

is when both entities in same position

and their IDs overlap

smth like ID 1000 and ID 10000

but how often that would happen?

[frosty siren]

small adjustment leads to different entities on same world positions is not same more, and adjustment values is deterministic because of entity.index
children can calculate parent's positions and make own additional adjustment to goes after parent, but how to figure out proper adjustment to child be sorted with other children

and also be before next parent

[rustic rain]

offset tag

[frosty siren]

component with offset value?

[rustic rain]

Predefined value that differs between objects

yeah

[frosty siren]

but they can move

[rustic rain]

let's say, it's float from 0 to 1

[devout prairie]

any idea is there a way to duplicate what ConvertAndInjectGameObject does, but inside a custom IConvertGameObjectToEntity class?

[rustic rain]

all your body parts already know their "priority" for drawing

before game starts

you can always add more

and etc

mix them in any way between

in the end it'll be just 1 query that makes a small adjustment to Y axis

[devout prairie]

ie default IConvertGameObjectToEntity behavior is to destroy the game object without the option to inject etc

[frosty siren]

if you mean add mono components to entity, then you can use ConversionSystem.AddHybridComponent()

[devout prairie]

basically as i've added above, to actually Inject the game object rather than destroy

[frosty siren]

ok that will work, but there is no room for movable nested sprites. Like magic orbs floating behind character

[rustic rain]

why not?

just change this value from 0 to 1

like sine

foreach entity.WithAll<floatingOrbTag>(ref ChildDrawOffsetComponent offset).Run()

smth like this

I guess

[frosty siren]

i'm not sure what you mean, because injecting or destroying is controled by convert components, and IConvertGameObjectToEntity is activated by conversion system in any case

[rustic rain]

actually, you aren't even limited to 0 or 1

it's up to you what values to use

idea is same

[frosty siren]

ok thank you for ideas, i'll try to compile it in some solution 👍

[rustic rain]

I actually wonder if you can acess parent's comp in children

and how it'll affect perfomance

[frosty siren]

with 1 depth level it is simple as LocalToWorld.Position - LocalToObject.Position

[rustic rain]

not really in this case

but overall

accessing some other entities component

[coarse turtle]

btw, has anyone had an issue where Entities calling IsEmptyIgnoreFilter result into a null reference exception?

FAULTING_SOURCE_LINE:  ..\Unity\cartediem\Library\Bee\artifacts\WinPlayerBuildProgram\il2cppOutput\cpp\Unity.Entities5.cpp

FAULTING_SOURCE_FILE:  ..\Unity\cartediem\Library\Bee\artifacts\WinPlayerBuildProgram\il2cppOutput\cpp\Unity.Entities5.cpp

FAULTING_SOURCE_LINE_NUMBER:  10675

SYMBOL_NAME:  GameAssembly!EntityQueryImpl_get_IsEmptyIgnoreFilter_mC61848E0EE4543DE37D44F14346CC26454719F78+54

I'm looking at a dmp file in windbg to see if I can figure out which query is causing this in an IL2CPP build 🤔

[digital kestrel]

how do you create / enable a system you marked a with [DisableAutoCreation]

using World.GetOrCreateSystem() doesnt seem to create it

[rustic rain]

Any idea what is wrong? I simply loaded new scene aaaaand all materials are black (they should be white and red instead).
Even though in component it's visible as red

by loaded new scene I mean this

        this.Q("button-newgame")?.RegisterCallback<ClickEvent>(StartNewGame);



    private void StartNewGame(ClickEvent evt)
    {
        SceneManager.LoadScene(1);
    }

Meanwhile if I load scene directly, not during runtime - it's all works as intended

[remote crater]

Anyway to "FUSE" a gameobject into all its children so you can turn it into an Entity?

Another general and fun question: Lets say I have Entities with "Attractor Logic" Aka, if you're within X range, pick it up.

In Gameobject terms, I just did an update and searched for nearby objects every few frames.

I wonder if there is a better way of doing this using ECS/DOTS.

Ie, you're pacmanning dots

And if you're within X of the dot, it collects.

The way I'm thinking of doing this is making an Attractor SystemBase .foreach parallel

the IcomponentData will be AttractorData

prolly won't have much in it, more of a tag, but maybe could have a modifier to be collected further, say its a magnet itself

In the systembase I am thinking of looping through all entities, and each entity will need a counter

Cuz one of the best things you can do in ECS/DOTS is to not do mass AI calculations every frame

So in AttractorData I'll have an int called: CycleInt

on the .foreach it will add +1;

then if Cycleint> 7, then look for a collection

and set cycleint=0;

Also...

It will be good to randomize

Every cycle int

well only if spawned

I'm thinking I want the jobs to cycle evenly, not spike every 7 frames, but thats minor

I'll need to find a function or something to find entities nearby.

Typically this involves a 3d array of stuff nearby...

I wonder if Unity supplies such functionality for DOTS/ECS

I think that's my big question.

Can you find stuff close by in your sector on a fast scale, or do I have to roll my own 3d grid buffer system to know stuff in the general zone nearby?

[karmic basin]

Light is disabled ?

[remote crater]

https://forum.unity.com/threads/best-way-to-find-closest-target-entity.672436/

[rustic rain]

when light is enabled, it's still balck

just highlighted

spheres are fully white originally (standard material)

here how it looks when I load scene directly

Original post with details of this problem:
#archived-dots message

[remote crater]

Oh great the unity example is in the boids example

I get a chance to recompile it

My youtube video doing 2.5 million boids got thousands of views...

But I never standaloned it for 10x as much processing...

[rotund token]

That will create a system fine but it won't add it to the playerloop to update

[digital kestrel]

how do you add it to the playerloop?

[rotund token]

https://docs.unity3d.com/ScriptReference/LowLevel.PlayerLoop.html
That or from memory you can manually add it to a SystemGroup

[digital kestrel]

thanks for the info, I'll have to look into it 🙂

[molten flame]

Trying to understand the order that the conversion system runs compared to the regular player loop.
Specifically I'm looking to initialize regular GO components in a script and ensure that they get converted.
Normally this works fine, but with prefabs it falls down.

[rustic rain]

https://dots-tutorial.moetsi.com/unity-ecs/spawn-and-move-prefabs-in-unity-ecs

take a look at this tutorial

high quality explanation

[molten flame]

Thanks @rustic rain, moetsi tutorials are great.
I think I gave a shit explanation of my problem.
I essentially want to know what people do for the equivalent of the Awake function in DOTS.

Sometimes I will have a mono that will add components via script dynamically instead of statically.
This means the added components do not have any data assigned from the inspector, the data would all just be sitting in the mono fields so would need to be assigned, normally I do this in OnValidate, then I would then call that OnValidadate func again in Awake so it works for prefabs too.
In DOTS, you don't get Awake afaict, or at least it's unreliable.
Thinking it through, I think Awake essentially becomes the Convert function, does that sound right?

However, this is what gets me, I dont think you can add components during Convert

[rustic rain]

Try to stip thinking in OOP

Can you explain what you want to achieve gameplay wise?

[remote crater]

You can addcomponents and data after you make em

[molten flame]

It's not a gameplay thing, its purely an authoring workflow.

In this example I want to set the material to my mesh renderer before the prefab is spawned.

Material _material;
MeshRenderer _meshRenderer;

OnValidate()
{
  _meshRenderer = AddComponent<MeshRenderer>();
  _meshRenderer.hideFlags = HideFlags.HideInInspector;
  Setup();
}

Setup()
{
  _meshRenderer.material = _material;
}

Convert(Entity ent, EntityManager em, GOConversionSystem cs)
{
  Setup();
}

[remote crater]

The conversion process is fickle

Either it works before or after, get anything working

I have mine to slap on diff mesh and materials but I forget how

The thing with dots now, is it ain't always pretty

get it functional, get it optimized

[rustic rain]

Just assign component after instantiating entitiy

[remote crater]

Listen to issue

[coarse turtle]

I'm confused with this statement here 🤔

[remote crater]

Sometimes you cant even add components and stuff before conversion

[molten flame]

GO Components

obvs you can add DOTS components

[coarse turtle]

Ah gameobject components

[remote crater]

You want to convert once, and keep an entity around to clone

like object pool

If you messing around with game objects live en mass, you doing something horribly wrong

[rustic rain]

I don't really get what you want to achieve

Entities don't run code

Only systems do

[remote crater]

He wants to slap gamedatacomponents on gameobjects before convert

I ran into th eissue too

its a mess, but thats fine, you shouldn't be doing that anyway

[molten flame]

Thanks for the help guys 🙂 I do really appreciate it

[remote crater]

I keep all my "objectpool" entities in memory

with a disabled and disablerendering tag on them

They don't slow the system down, but make the entity debugger a bit crowded

Then when you entity e=instantiate it, then you can add to e.addcomponent

or ecb.addcomponent

either entity directly or entity command buffer if needed

I just realized, my game is almost ready to launch.

Tomorrow I'll launch and do the tutorial video

I wonder if my Unity Asset store application vetted

[rustic rain]

For what purpose?

[remote crater]

I will make this sooooooooo Easy for everyone, even people with mature gameObject games

Issue, if you keep disabled and disable rendering on a zillion stuff spawned from your resources folder

you can immediately isntantiate off them like they're object pooled

its easy pz, and no GUI editor work.

[rustic rain]

Uugh

I still don't follow

[remote crater]

Can you wait a day?

I have a million small tricks that all add up to a Smooth Design Patterns Architecture for DOTS

Well

Ok I'll walk you through this part

You know the resources folder is a special folder?

[rustic rain]

Let's assume I do xD

[remote crater]

Its the one folder that allows you to load game objects from disk on the fly

so you don't need to drag em in a scene or something

[rustic rain]

Ah, I did it once

[remote crater]

Unity says not to do it

Because they think people are morons

But no coder is a moron

[molten flame]

Ha

[remote crater]

People who make GUI IDES think no one should code stuff they can drag and drop

Anyway, you load up your gameobjects, then slap em in a buffer pool

Then you can use em anywhere

I need to cool down, get some sunlight before close

I'll do this tutorial, I told people for a year I'd do

I finally have a core, everything works

And everyone needs this.

I'll be back in an hour after cleaning shed, and then I'll do my absolute professional youtube + clean up code for this one.

I have people like Turbo Makes Games amazed at what I came up with.,

oops

https://www.youtube.com/watch?v=GIEV14B20Pc&t=1085s

Not a lot of you will understand this, but this is how ANY GameObject video game can get DOTS ECS update levels.

Its rambly, bad production. I promise you guys, in an hour, I'll get it making sense, with tons of other big time methodology not being used, but should be industry standard.

In short, I'm going to make DOTS/ECS easy, but give me 8 hours to produce it.

People say you can't even make GameObject games into DOTS/ECS, you have to start from scratch. That is not true.

[rustic rain]

It's a deal

See you in 8 hours then kek

[remote crater]

HUK

I want to make the chobo gosu

well discord bots killing my Korean whale face

\

\ ( ^ ________ ^ ) /

sposed to have more underlines

\ ( ^ _____ ______ _______ __ ___ ^ ) /

what the lol, those are all _

Discord made it into a creepy hockey veteran Korean whale

[molten flame]

Thats a cursed whale

[remote crater]

hhahaahh

[rotund token]

i think you're forgetting about memory management here. you've just loaded all your assets in memory permanently without anyway to release them. this might work with a small game but it's not feasible for any asset heavy game.

[remote crater]

Nah, you can load/unload em at will.

Initialization of gameobject can happen over and over.

This system is literally perfect.

Well for all my use cases and I am quite demanding.

My software architecture always demands the ability to build upon.

I think you'll be impressed my tertle bro, remember, you helped bring this to fruition.

[rotund token]

You don't seem to understand how memory management works with asset bundles (resource folder is considered a single asset bundle)

Just destroying the asset from a resource folder is very unlikely to free any memory

[remote crater]

I was under the impression, the resource folder was a disk hit.

[rotund token]

This is the reason Unity tells you to avoid the Resource folder

[remote crater]

Where's the one to load from disk then?

[rotund token]

You can avoid that by not using the Resources folder, which makes detailed and controlled memory usage quite hard to achieve. It will be build into a single AssetBundle and then fully load the index into Memory. Assets loaded from it may remain in memory longer as needed in the scene and you have less control over when they get loaded in, as e.g. loading an object that references them will load them into memory. Instead, you can get more control by placing these assets in separate asset bundles.

[rotund token]

The quick explanation of how asset bundles work.

• Lets say an asset bundle has 2 assets, A, B, C
• You load asset A, B
• You unload asset A. Both asset A, B will still be in memory
• You load asset C. A, B, C now in memory.
• You unload asset A, B. A, B, C now in memory.
• You unload asset C. All memory freed

[remote crater]

I know of alternate ways of loading assets, but I always thought Unity was convoluted in not allowing us just to load from disk.

[rotund token]

TLDR; all assets in a bundle need to be unloaded before memory is freed for the bundle

[remote crater]

I definitely keep one copy of every asset in memory.

[rotund token]

yeah so if you have 20GB of assets you now permanently have 20GB of memory used...

now imagine AAA games with 100GB+ assets

[remote crater]

But you're saying like if I have a resources folder of 64gb, that even if I don't load anything, it will take up 64gb

[rotund token]

The one exception is for the Resource folder which has this function
Resources.UnloadUnusedAssets
Which will force unload assets from memory that are not used

The problem is, it causes huge frame spike

so can only really be used during a load screen

[remote crater]

Of course it should

Loading/unloading from disk is uge

But should be used sometimes

That's all very valuable information. I have many ways of loading things, not just resources.

Just resources is the fastest way to type it out. Keystrokes are faster than mouse drags.

[rotund token]

(I'm very bitter about memory management atm. I've spent around 3 of the last 6 months optimizing asset loading and memory manage for old gen consoles...)

[remote crater]

Imagine 40,000 mesh game objects drag and dropped

ahhaahahah

Your wisdom is well spent my man.

For if you ever see me flush with cash, from games, just hit me up

Rather just type out 40,000 or index loop em than drag and drop 40,000... especially if you need to shift, I think we're good to go.

I'm just glad you added to knowledge.

[safe lintel]

i always found assetbundles hard to understand 🙂

[remote crater]

The demo I wanted to post has weird compile errors

[still pewter]

I need some help with structuring my code. I'm a bit of a newbie, but I'm stuck on the following problem.

My goal is to have an inventory with 5 slots, and when you would select, let's say slot 1, it shows a preview mesh at your cursor, and when you click, it builds that entity. In my case a turret for a tower defense game.

So I need to convert and declare these GameObject prefabs through a GameObjectConversionSystem, simple enough. But then I need to store these in an inventory that I can reference to when I select a slot, I guess a BlobAssetReference?

In Standard Unity, I would have an inventory manager with an array of 5 scriptableObjects containing the GameObject turretPrefab, the Mesh previewMesh, the int buildCost, and Sprite iconUI.
But how would I convert a ScriptableObject that contains a GameObject prefab?

[rotund token]

@still pewter while maybe not an inventory, conceptually are you trying to do something like this? i.e. preview + place
If so I can kind of detail at least part of how I'm handling this so far (it's a work in progress)

[remote crater]

I was making the standalone template and ran into this error: IndexOutOfRangeException: Index 0 is out of range of '0' Length.
Unity.Collections.NativeArray1[T].FailOutOfRangeError (System.Int32 index) (at <d3b66f0ad4e34a55b6ef91ab84878193>:0) Unity.Collections.NativeArray1[T].CheckElementReadAccess (System.Int32 index) (at <d3b66f0ad4e34a55b6ef91ab84878193>:0)
Unity.Collections.NativeArray1[T].get_Item (System.Int32 index) (at <d3b66f0ad4e34a55b6ef91ab84878193>:0) Unity.Physics.Broadphase+DynamicVsDynamicFindOverlappingPairsJob.Execute (System.Int32 index) (at Library/PackageCache/com.unity.physics@0.6.0-preview.3/Unity.Physics/Collision/World/Broadphase.cs:1052) Unity.Jobs.IJobParallelForDeferExtensions+JobParallelForDeferProducer1[T].Execute (T& jobData, System.IntPtr additionalPtr, System.IntPtr bufferRangePatchData, Unity.Jobs.LowLevel.Unsafe.JobRanges& ranges, System.Int32 jobIndex) (at Library/PackageCache/com.unity.jobs@0.8.0-preview.23/Unity.Jobs/IJobParallelForDefer.cs:62)

[rotund token]

probably forgot to add a handle to the physics world

Also just a heads up to developers , Unity 2020.3.26 and 2021.2.8 appear to have broken DeferredJobArrays or something related to it (and therefore Netcode). I believe it's likely this change
Kernel: Fixed an issue where low bit set in NativeArray buffer pointer assumes NativeArray is created by NativeList.AsDeferredJobArray which is not always the case. In some cases NativeArray can be created by NativeArray.GetSubArray, where pointer would have lowest bit set for odd byte aligned offset. (1294627)

[still pewter]

@rotund token yeah that's pretty much what I'm hoping to accomplish too!

And I assume that you can press 1 or 2 to change your object? Because that's also what I'm trying to do

[rotund token]

yeah 1, 2 currently changes type. adding remove tomorrow

i've split the prefabs into 2, I have the 'preview' and the 'ghost' (i'm built this using netcode, so by ghost i just mean the actual placed structure)

these are just prefab instances for maintainability. the ghost is basically just the preview with physics collider added and a couple of other scripts etc

[rustic rain]

is there any up to date example of character controller?

Mostly interested in collision with environment

and how it's done

[karmic basin]

The sample from Unity is not so great

you can find better implementations on blogs (and maybe the forum ? not sure)

Worth mentioning Rival asset too

[rustic rain]

Rival is not open source project I assume

hm

is doing public float3 CurrentDirection { get; set; } such properties ok for structs?

components I mean

what's the difference between just using field of float3

as value

Do you guys know, is IJobChunk smth obsolete?

[still pewter]

Awesome! Can I ask, how did you convert and declare these prefabs? And are they part of some sort of inventory?

[verbal pewter]

Question: how are we meant to check equality of components? In one case I'm using Equals which is throwing the following Burst error: Burst error BC1001: Unable to access the managed method object.Equals(object) from type RockMine.C4.Generation.City.Networks.NetworkNodeArchetypeData.

[worn valley]

What equality are you trying to test? Equal values in the component or the same component by reference?

Two components may have all the same values but not be associated with each other.

And since components are structs they are passed around as values and aren't really objects to be equaled with each other.

[hot basin]

do I need dots physics to make selection in pure DOTS?

I mean, normally I just make a raycast but it needs a collider on the object part so can I do it without somehow?

I have no use for physics in my game so using it this way seems to be an overkill

[left oak]

^ There's ways to spatially partition stuff and query for selection other than resorting to raycasts with the physics package, but you'll have to do a lot of it yourself, so that's a tradeoff

[rustic rain]

in case you go with dots physics, it's pretty lightweight when it has no objects to work on

literally 0.01ms on 0 objects

entities*

[hot basin]

what do you mean? I will need colliders on everything selectable

like rigidbody equivalent?

[rustic rain]

I mean is that if they will be kinematic, they won't cause anything to process

[hot basin]

👌

then I'll try

[rustic rain]

I'm currently trying to understand unity samples of physics

and ngl

my head hurts

even after bull sized sugar doses kek

[hot basin]

AFAIK it will produce pair collision event that you need to handle and that's everything

[rustic rain]

if you just want to select on mouseover

then we are actually studying same thing rn

I'm looking through "Mouse pick" system

[hot basin]

for every collision it's the same

[rustic rain]

that lets you drag objects

in short, this is how it looks

I don't really get the magic behind CollisionWOrld.CastRay tho

but it seems like it's ready to use code for getting entity on mouseover

with precision of exact point of body you click

[hot basin]

nice, thanks! that will definitely help me

[rustic rain]

https://github.com/Unity-Technologies/EntityComponentSystemSamples/blob/master/UnityPhysicsSamples/Assets/Common/Scripts/MousePick/MousePickBehaviour.cs

here whole code

btw

do you have any idea about

IJob interface

IJobChunk

and etc

are those about to be deprecated?

Those are pretty old samples

and I haven't yet seen those interfaces in any new tutorials

so I kind of fear

if I should learn more about them or not

[hot basin]

I know only that IJobChunk will be replaced by IJobEntityBatch or something similar

but never used them

IJob is just a simplest job type

[rustic rain]

I only worked with Entities.ForEach or Job.WithCode

haven't touched any interfaced job structs

[hot basin]

then just try it 😄 they are simple

sadly in my company we don't use ECS so I'm constrained to jobs in MB

[rustic rain]

I do get general idea, just wondering

if I should get used to them

[hot basin]

they are pretty same as Entities.ForEach, just couple more lines like .Complete()

[rustic rain]

is there any reason to use them tho?

I assume whatever code is done with them

can be done with ForEach and etc

[hot basin]

i.e. I have "attack component" with target and value
in my system I do 2 jobs, first sort components by target and second one apply dmg to the target

It would be difficult to do this in .ForEach manner

[rustic rain]

well, you can do such loops several times

in one OnUpdate

tho

[hot basin]

yes you can, but after my first loop/job I have NativeHashMap so

[karmic basin]

If you guys are working on selection with DOTS, TurboMakesGames just released a video on that this week if I'm not mistaken

ECS*

[rustic rain]

I'm just learning stuff I don't know by looking through 2 yo examples xD

[hot basin]

thanks I will check that

[hot basin]

Try it out, learn how they work and use whatever you find easiest to implement

[rustic rain]

it's easy to say xD

even with those comments, my head just goes pffff

[hot basin]

learning about stuff gives you more options to use in the future

[rustic rain]

My current goal is actually to make a character controller

[hot basin]

if you want to learn jobs look into basic DOTS samles

[rustic rain]

similiar to GO one

that is responsive and not really attached to physics

besides collisions

[hot basin]

not phisics or any other package specific

I remembered now, there are different samples for jobs only

like not even in ECS

[rustic rain]

I don't find jobs hard

I find physics hard kek

these examples seem to assume that you know what all that means already, just showing how it's done in dots...

but I'm learning this stuff from ground zero (besides irl physics knowledge, which doesn't help a lot tbh)

[hot basin]

and they should be as they are "physics samples" not "job samples"

it's your mistake to start in the middle 😄

[rustic rain]

yeah, that's I was asking whether

those job struct interfaces are deprecated or smth

cause they appeared only in old samples

[hot basin]

so the answer is: no, they don't. ForEach it's just a wrapper to reduce boilerplate, it's all jobs under the hood

sometimes you want more control that ForEach gives

and you can make your own custom made job types for whatever reason

the only reason I found is to iterate other collection than array in the IJobFor

probably your own custom native collection

[left oak]

IJobChunk will, I believe, eventually be superseded by IJobEntityBatch & IJobEntityBatchWithIndex, though, it's unclear if that will happen in version 0.5

[hot basin]

I tend to make ForEach in systems that operates on single entity, and Jobs in systems that communicate between enities and need 2 or more entity queries

as an example for uses of jobs

[left oak]

You can do things when you operate on entire chunks that's not as efficient when just using entities.foreach

[pliant pike]

I don't suppose anyone knows if when using a CommandBuffer in a job to create an entity there's a way to ensure that it only creates one of those entity's?

[hot basin]

single bool value?

[dense crypt]

What do you mean here? If you only create 1 entity there will only be one entity

[left oak]

i mean definitely don't put the spawning logic in a parallel job then

[pliant pike]

I have a weird job loop that's running over multiple entity's and can run multiple times for a single entity

[dense crypt]

Yeah doing it in parallel will be problematic. If you run it in parallel and create multiple you'd need some cleanup job to run later and clean up all but 1 of the entities.

[pliant pike]

I want to create like a singleton event entity that will cause another job to run

[dense crypt]

In this case you could create multiple, and as long as one exist then run and cleanup

[pliant pike]

hmm yeah maybe the job to clean up the excessive entity's run after the AddJobHandforProducer would be the only way then 🤔

[left oak]

like peppej said, if it's just an event flag, it doesn't matter if there are duplicates

[pliant pike]

but [RequireSingletonforUpdate] requires a single one

[left oak]

just use a regular query

but don't iterate for each entity in query

[dense crypt]

The way I would do this is have an entity that always exist and flip a bool value on it. Always run the job and if the value is false just early return.

[left oak]

and RequireForUpdate

[dense crypt]

Depending on how often your "event" entity is spawned/destroyed it's probably faster the just flip a bool value

To prevent err

[left oak]

yeah, your systems will still run, so you might need to modify your OnUpdate code

[pliant pike]

yeah that is one way I thought of

[left oak]

actually, your dependent jobs will all still run

[dense crypt]

~~wtf I can't remember what its called. ~~Structural changes is expensive if you have to allocate a new chunk.

[left oak]

cause the changefilter will always return true

it's a tradeoff of structural changes vs scheduling jobs that don't do anything/early-out

[pliant pike]

ok boolean it is then, thanks everyone 👍

[hot basin]

👌

[left oak]

there's an old forum thread that compares bools vs tags at scale for performance, and there's definitely a tipping point somewhere, but not sure it matters for individual tags, unless it means the difference between having/not having any structural changes on a given frame

[misty wedge]

Is StepPhysicsWorld very slow for anyone else?

I have 32 physics entities, which seems like a paltry amount, and the system takes ~3-4 ms...

[rotund token]

Turn off jobs debugger etc and then profile

[rustic rain]

sooo. I'm looking into collision filters. And I found this funny example:
Object belongs to nothing collides with static env

and then I have static env, that collides with everything

and they don't collide

any explanation why?

[unkempt silo]

How to put I componentdata onto an entity? Was trying to use ECS visual scripting to wrap my head around ECS

However for certain code to work on a certain archetyoe of entity I need to make sure those entities have certain data

[rustic rain]

SetComponentData

[unkempt silo]

How do I attach it to an entity in the hierarchy for testing

[rustic rain]

a bit more details? Do you convert GO or create entity in runtime or?

[unkempt silo]

Well the thing I'm confused about setting entity at runtime

How do I set the correct entity's at runtime

Eg I have cows and pigs

[rustic rain]

you create new entity either by archetype or you manually add components

[unkempt silo]

If they both start as the same archetype how do I set an individual to have a certain component

[unkempt silo]

Is there a way to set an archetype in the editor

[rustic rain]

here how authoring components usually look like

[rustic rain]

if you have some sort of prefab

you usually just make authoring components

and put them on your GO

[unkempt silo]

Ok so you would add this script to the prefab

[rustic rain]

so they get converted upon start

this script is mono

create->ECS->Authoring

you'll get your template

with detailed comments

[unkempt silo]

Ok interesting

Thank you I will try to go on that

[rustic rain]

https://dots-tutorial.moetsi.com/unity-ecs/spawn-and-move-prefabs-in-unity-ecs

I really recommend this site for tutorials

[unkempt silo]

Oh excellent

[rustic rain]

up to date tutorials on dots

actually a gem for newbies like you and me

kek

[unkempt silo]

Awesome. Yeh Im not even sure how to wrap my head around ECS especially since it's apparently always changing

[rustic rain]

ECS is not changing

dots does

but it's irrelevant

it's mostly about learning this new way of thinking anyway

[unkempt silo]

Honestly I wasn't that good at the old way of thinking so maybe I have a head start there haheha

[rustic rain]

I barely just learnt of OOP and already diving deep into DOD kek

It is really fun

[unkempt silo]

But there seems to be a lot of seasoned developers saying "oh I'm not touching ECS properly until they sort it out"

[rustic rain]

I kind of already was using sort of ecs system while doing tile based gas

where gas was literally an index of array kek

[rustic rain]

eh, you can wait forever

or you can start now

and then just catch up on changes

can be compared to watching series on season's releases or watch whole thing in one sitting xD

[tawdry iron]

hello, I've been messing around with quaternions in order to fix a problem with my prefabs being spawned sideways, yet for some reason it's also changing the size and shape??

[hot basin]

seem you don't know how the quaternion works, it's not just a x,y,z rotation as it was before, I think you should just google it as I will not be able to properly teach you how it works by few messages on discord

changing scale is probably due to wrong quaternion values as it lands in local to world matrix

[rustic rain]

you don't change quaternions yourself (I doubt there's a sane person who can actually edit it manually)

instead you generate them from Euler angles

[hot basin]

ideally you just use quaternions

[tawdry iron]

this is crazy, cus it was my own lecturer who told me to do this

[rotund token]

if you don't want rotation use quaterion.identity

[tawdry iron]

it's only rotation I want

[rotund token]

what you have here is a non-normalized rotation

so will cause all sorts of issues

[tawdry iron]

I just want them to face upwards tbh, instead of sideways

[tawdry iron]

cool, so how do I fix this

[rustic rain]

Quaternion.Euler(Vector3.up) should do

[rotund token]

I think you should avoid both Quaterion and Vector3 if you're using entities

[tawdry iron]

oh? may I ask how this works?

[rustic rain]

but how?
I understand how to get rotation out of 2 quaternions, but some fixed quaternion without euler angles? That is just not smth you can calculate in your head

[tawdry iron]

I'm ridiculously new to this

[rustic rain]

it's just simple math from euler angles to quaternion

[rotund token]

quaternion.Euler(math.up()) would be the math library equiv

[rustic rain]

you can easily switch between two

but when cpu works with it, it doesn't do that. It works purely with quaternions, which avoid all bugs related to glitched rotations, that happen with euler angles

[tawdry iron]

[rustic rain]

in short: quaternions is just different way to describe rotation of object.
The reason it's used: it's bug free. But unreadable for human.

actually, it is readable, just not for sane ppl xD

[tawdry iron]

while, I'm here, as you can see I'm making a beehive. What would be a good video for ai pathfinding that I could use

[rustic rain]

I spent about 10 hours trying to understand them, but I gave up

I literally watched through math course just to try and understand them xD

[hot basin]

add == multiply in quaternions

[rustic rain]

no, I mean how do you just go and define certain angle

for example Vector Up

in quaternion

[hot basin]

so value * quaternion.RotateY(90) is rotating something by 90 in Y

or instead of degrees it take radians, don't remember now

[rotund token]

there are many ways to represent stuff depending on what you need, another example is quaterion.LookRotation(float3 forward, float3 up)

[rotund token]

yeah whole math library is in radians

[hot basin]

radians = angle/360 * PI

[rustic rain]

and what quaternion will it give?

what is Euler alternative for it?

[rotund token]

or quaternion.AxisAngle(float3 axis, float angle)

[rotund token]

depends entirely what you feed it

if you're standing up, you're forward 0,0,1 and up 0,1,0
if you're lying down you're forward is now 0,1,0 and forward is probably 0,0,-1

[hot basin]

but I think it takes only normalized direction vectors?

[rustic rain]

kinda, that's what I meant:
You can transform quaternions, it's pretty simple.
But not just define it, without using euler angles.

so initial rotation will always come from euler -> quaternion transformation

[rotund token]

i'm just saying you can define it in direction vectors instead of euler angles

and if anything it makes more sense

[rustic rain]

where can I read more about this btw?

This kind of subject is of my interest rn

[hot basin]

to do that you actually need to know math 😄

[rustic rain]

well, multiplying matrices is not fun math tbh

I'd let machines do that stuff kek

[rotund token]

just think about real life. you don't think 'my tv is rotated 90* in the Y direction'. You think 'my tv is facing forward'

it's interesting we choose to think differently when developing games

just food for thought

[tawdry iron]

sorry boss, it says it can't recognise Euler

[hot basin]

EulerAngles

[rustic rain]

no, it's for extracting

you sure you use Quaternion, not quaternion?

I don't remember alternative of Euler in quaternion

[tawdry iron]

nah, it's quaternion

lowercase

[rustic rain]

it doesn't have Euler method then

maybe it's just called differently

idk tbh

[rotund token]

literally wrote it above

[rotund token]

^

[tawdry iron]

no, it's really just not recognising what Euler is

for some reason

[rustic rain]

EulerXYZ

try this one

[tawdry iron]

nope, still refusing to recognise it for some reason

[rustic rain]

Just

[hot basin]

strange, but quaternion is ok?

[tawdry iron]

yes

[rustic rain]

press ctrl and click on quaternion

and look what it has inside yourself

[hot basin]

do you use assembly definition files?

[rustic rain]

oh wait, you actually might want ZXY

looks like this is what Unity editor uses with GO

[hot basin]

first of all restart unity XD

[tawdry iron]

[tawdry iron]

see, that's what I'm confused, Euler is actually used

but it's NOT accepting it?????????

[rustic rain]

and how exactly you are trying to call it?

[tawdry iron]

as a new rotation

[rustic rain]

just show

[rustic rain]

welp

[hot basin]

do you even have quaternion.Euler here?

[rustic rain]

I guess you need to learn C# syntax a bit more

instead of new, just put

quaternion.Euler(whateverEulerAnglesYouwant)

[tawdry iron]

won't unity not accept that?

[tawdry iron]

also no

[hot basin]

show us how you actually use it

you probably have a mistake so unity don't accept it

[tawdry iron]

I don't use it, that's the problem 😢 , this the first time I'm trying to touch rotation at all

but oh well

[hot basin]

Value = quaternion.Euler(new float3(0f,0f,1f))

use this in rotation

[tawdry iron]

it worked

kinda

but I can work with this

thank you very much!

[hot basin]

np

[tawdry iron]

if I have any other questions, I'll be sure to come back

thanks fr man

I'll mess around with rotations

[hot basin]

I think it's radians as Tertle said so if you want to use degrees:

radians = angleInDegrees/360 * math.PI

[rotund token]

there's just

math.radians(degrees)

[hot basin]

oh there is helper function, neat!

[tawdry iron]

oh yeah

I asked if there was any good videos on pathfinding that anyone has seen?

[hot basin]

CodingMonkey channel has one I think

but it's 2D

[rustic rain]

DynamicBufferTriggerEventAuthoring
Can anyone explain this a bit?
So I read through code of this system about 5 times

But it's just feels like reading unknown language xD

Am I correct to assume that whichever entity has this component will collect all collision events in it's component buffer?

Or maybe just explain in short how you're supposed to use it? I generally get the code behind it, but I just don't get how to work with it

[rotund token]

doesn't this basically just add support for stateful trigger events "TriggerEnter" "TriggerStay" "TriggerExit"

[rustic rain]

yeah, it converts simple trigger events into stateful events

as far as I understand

and looks like it gets it from some Unity Physics system

[rustic rain]

omfg, they created a humanoid ragdoll

in 500 lines

I'm extremely confused

[dense crypt]

chunk.GetSharedComponentIndex() seems to return an index of 2 but the array populated by GetAllUniqueSharedComponentData only has index 0 and 1. Why is it returning an out of bounds value?

[haughty rampart]

it might return the length (how many shared component date) instead of the index?

[karmic basin]

First hunch would be a structural change between the two get operations ?

[dense crypt]

Yeah I think this is my issue, currently investigating

[remote crater]

Sorry for the delay on that DOTS/ECS Ez mode tutorial, my old code that worked last year got hosed with a UNITY editor update.
Gonna do a modified version with only code snippets instead of a full project.

I rabbit holed like 7 hours trying to just get old code working for tutorial purposes. Did not succeed.

Once I finalize a few things on my game, I'll be able to do the DOTS/ECS ez mode tutorial, but I can't give a full project, just classes and stuff to assemble.

[pliant pike]

there's this one https://www.youtube.com/watch?v=I1KX6YM_GeI

[tawdry iron]

I saw this, but the problem is that it's 2D and works by clicking on a place. I want to make bees come out and in of a certain place

[pliant pike]

it wouldn't bee that hard to make it work in a 3D space or however you want

[rustic rain]

isn't 3D pathfinding is same 2D in most cases?

unless you have some sort of space game ofc

[tawdry iron]

I see what you did there

[tawdry iron]

nah, I just wanna make the bees from before come in and out of the beehive

[rustic rain]

do you really need pathfinding for that?

[pliant pike]

I mean yeah it wouldn't be hard to add an extra z dimension if you really needed to but it doesn't sound like pathfinding is needed for this problem at all

[tawdry iron]

I mean, if they're being randomised every time they come in and out, I thought they would?

[haughty rampart]

randomized how?

[pliant pike]

I don't suppose anyone knows how I change a singleton inside a job you can't seem to manipulate the value gotten from Getsingleton and SetSingleton doesn't work?

[rustic rain]

why it doesn't work?

SetSingleton is exactly what you need

[pliant pike]

it says its only allowed to be withoutburst() and Run()

I know I don't get it what's even the point of singletons then 😕

[rustic rain]

it's just special entity that can be only unique

one and only

[pliant pike]

yeah and which you cannot change inside a job

[rustic rain]

but you can

what's the problem to run job without burst?

[pliant pike]

because the whole point is to run a job with Burst that's how you get the best out of dots

[rustic rain]

hmm

I wonder if you can use command buffer

to change singletons

[worn valley]

@pliant pike What are you trying to run?

[rustic rain]

I really wonder tho, what kind of job on singleton you want to do, so you need burst for it

[pliant pike]

I'm just trying to set a boolean Singleton inside a Schedule() singlthread bursted job

[worn valley]

What type of Singleton? An component singleton?

[pliant pike]

yeah what other types are there?

[worn valley]

Singleton means there is just one type of that thing in the program. So singletons can be classes and other stuff

[pliant pike]

no yeah just a single componentdata

[worn valley]

So you have a component attached to a entity and you want to modify that component?

[pliant pike]

I mean I guess I could just use an EntityQuery and that would work but then what is even the point of GetSingleton SetSingleton etc

[rustic rain]

to get and set unique data?

[worn valley]

There are a lot of non burstable stuff that makes it easier to do certain things. But yeah, doing a query would work. SetSingleton is definitely a regular write.

There may be some methods to write a to a singleton. A lot of the ECS code has regular non burst stuff in it just to get it to run. Then they loop back to make it burstable and job ready later

[tawdry iron]

I want the bee to leave the hive then run around the hive and return through the same hole. But I want to make it so that the bee always uses a different path when it leves the beehive every time

[karmic basin]

You could generate a Random spline and adjust the bee position and rotation along that path. Never tried splines in 3d though 🤔

[pliant pike]

it turns out the ecb does work to set a singleton 🤷

[worn valley]

huzzah

[rustic rain]

kind of weird tho

don't you want your single ton to be instantly changed?

[haughty rampart]

+1

[rustic rain]

instead it's just gonna be only on next frame

[haughty rampart]

that should be plenty fine though

the singleton value will not be used in other jobs anyway in this frame

[pliant pike]

yeah its not super time sensitive

[rustic rain]

idk, most things I can imagine with singletons are just global settings

[haughty rampart]

sure. but then next frame is perfectly fine

[rustic rain]

and what if it's time sensitive global setting tho

it might create some glitches

[haughty rampart]

it will rather create glitches if it's instant

[safe lintel]

thought this was mildly interesting

[haughty rampart]

in what way?

[safe lintel]

hes the lead on the hybrid renderer

[pliant pike]

cool I didn't think it would be that quick before other engines would emulate nanite

[haughty rampart]

eeeehh, i mean i am looking extremely forward to a nanite equivalent but i wouldn't give anything about a speculative twitter comment

[pliant pike]

nanite with dots would be insane

[safe lintel]

i figured they wouldnt even bother attempting an equivalent tbh

[haughty rampart]

true. though the benefit would even be without dots

[haughty rampart]

nah they definitely would / will. it wouldn't make sense not to

[karmic basin]

Well, we'll see in 10 years then 😄

[pliant pike]

I thought as soon as Unreal announced it every other engine would be trying it

[safe lintel]

nah thats when we'll see 1.0 @karmic basin 😅

[haughty rampart]

'every other' probably not. crytek and unity, definitely

[karmic basin]

Haha yeah

[haughty rampart]

i hope we get mesh shaders before nanite equiv though

[tawdry iron]

How would I even go about starting to do that

[haughty rampart]

by googling and researching

[robust scaffold]

The power of google and stack overflow. Coding is 40% Googling, 40% debugging why those googled code doesnt work, and 20% actually coding.

[rustic rain]

research 9 times, write code once

hmm

I wonder if there's a way to create some sort of abstraction for job system

I want to create some sort of system that will process whatever Job component entitiy has, where that Job component is AI state for doing something rather complex

Let's call it work:
so that work can be either going from one point to another, or doing some action on certain position

Thing is, amount of such jobs can be thousands

and you don't want to define each as system

anyone knows anything about this sort of stuff?

in OOP that would be just abstract Work class and whoever needs that AI, would just tick over some virtual method

I want to know how you can implement smth similiar with dots

[karmic basin]

Yeah that's not really a DOTS question at this point. When lost you can start by deconstructing the problem in lighter tasks. Here it could be

1. learn how to generate a 3D spline
2. learn more about path following. For example, Craig Reynolds' "Boids" implement a simple path following solution https://www.red3d.com/cwr/steer/gdc99/ (actually all of the Boids concepts would be useful for a beehive, depending how far you want to push your scene)

[haughty rampart]

you can still create a 'MyThingJobSystem' and derive from it like in oop

[remote crater]

Dev blog about how awesome DOTS/ECS mostly and Gameobject only games are. Take any GameObject game you had, and add DOTS/ECS levels without rewriting player controller twice: https://old.reddit.com/r/devblogs/comments/s5th2g/two_paradigm_shifts_indie_revshare_can_employ/?

[rustic rain]

Yeah, but I don't see it work without some managed component and calling virtual methods of this component. Which basically defeats the goal.

Any idea how it can be done alongside DOD?

[haughty rampart]

? It has nothing to do with components. You're in the system. And also just use static methods

[rustic rain]

hm, static methods

that's sounds like a plan

[tulip robin]

Hello guys, I have a big question.
I wanted to know if it was possible to use "Graphics" command buffers in a base system running a ComputeShader in parallel with burst?

At the moment I have this working but I think it's not optimized and I'm missing some features to know.

so if you have the best way "the most optimized" for this kind of features, with pleasure!?

[haughty rampart]

Command buffer will be executed on main thread only btw. Also compute shader works on GPU, not CPU, and I don't think you can dispatch them from a different thread cause that wouldn't make a difference anyway

[tulip robin]

So for this you are sure i can't do it ?

so why i can fill command buffer in SystemBase ?

and i have async btw

[haughty rampart]

For this I am 99.5% certain that's not possible

[tulip robin]

aie 😢

[haughty rampart]

Also, the command buffer in dots and in graphics are not the same

[tulip robin]

i know x)

that's why i try to make fusion

because i don't want to wait end of my compute shader

need to find solution to get handle or async c shader

[haughty rampart]

At least how you propose it it's most definitely not possible

[tulip robin]

humm CPU is use only to write data in GPU for compute shader ?

[haughty rampart]

I don't think there's any. The compute shader already runs on all GPU threads. And the GPU has to finish all tasks anyway before drawing anything

[tulip robin]

ah

[haughty rampart]

Yes

[tulip robin]

"GPU has to finish all tasks anyway before drawing anything" this is important thing

sad

so i can't dispatch end wait an handle to make "async"

[haughty rampart]

I'm 80% certain that doesn't exist

[rustic rain]

wdym

you can dispatch async

[tulip robin]

like this

class A {
bool chocolat;

void thread() {
  chocolat = true;
}
void update() {
  if (chocolat)
    doSomething();
}

}

@rustic rain its you, you said me i don't need to use async dispatch

btw

[rustic rain]

https://docs.unity3d.com/ScriptReference/ComputeShader.DispatchIndirect.html

[tulip robin]

And how you know when it's finish ?

[haughty rampart]

Isn't that something else than he asks for?

[tulip robin]

i think ^^

[rustic rain]

I haven't actually worked with async, but I saw a lot of mentions that it's supported

here another link I found

https://docs.unity3d.com/ScriptReference/Graphics.ExecuteCommandBufferAsync.html

[tulip robin]

yes look my pictures here so i m thinking how to make it properly, finally that's why i made this question because i have too less experience with CShader and ECS

possible to play with that

ok ok i see better now but not ultime mind x)

btw sorry for my english ^^

[rustic rain]

ahem

[tulip robin]

?

[rustic rain]

It's my own problem:
I don't get what is wrong
SceneManager.LoadScene("SampleScene", LoadSceneMode.Single);

I literally try to load other scene

and it won't go flawless

[tulip robin]

?

you added ?

[rustic rain]

yeah

I tried loading by index

same deal

[tulip robin]

LoadScene"Sync" deprecated for me

[rustic rain]

now it's doubled xD

here exactly what I do

World method is irrelevant (it's just resetting DefaultWorld of entities)

[tulip robin]

Ok and what is "please use ..." you have plugin ?

[rustic rain]

what plugin?

It says "Please use SceneManager.LoadScene()"

xD

btw

I checked

LoadScene is also using LoadAsync

inside

[tulip robin]

xD

ahaahah

[rustic rain]

I'll try to build and see if it'll be same

[tulip robin]

strange

i m going to try c buffer async with read callback

[rustic rain]

ah yes, Build exceptions

my favorite

hmm, input system doesn't work in build for some reason

I use new input system

[tulip robin]

same i try to make all from scratch (hand build) ^^

[haughty rampart]

you cant unload the current scene before having switched to a new scene

[rustic rain]

no difference if I put it or not, I still get yellow warning

and broken materials

[haughty rampart]

uncomment the unload and try again

[rustic rain]

same deal

[rotund token]

How are you waiting for your scene to load before unloading

Because it looks like you're unloading before loading a new scene

[rustic rain]

Unloading is part of loading new scene

it's just a trigger event

of clicking button

[rotund token]

Hmm It's not the same scene you're in is it?

[rustic rain]

no

[rotund token]

Oh wait you're using the entities scene manager not the unity engine one?

[rustic rain]

I do?

[rotund token]

Just based off your stack

I guess it's listening to an event

[rustic rain]

I basically copied a sample of unity official repo

[rotund token]

Except they use load scene

Not load scene async

Which is what the warning is telling you to do

[rustic rain]

Uugh?

I use LoadScene

[rotund token]

Ok I'm tired and on my phone

Clearly I can not read

Got no idea then mate sorry

I have been no help but I don't use scenes so no experience sorry

[rustic rain]

Any idea about new input system not working properly in builds? COmpared to Editor

[rotund token]

What's the error

[rustic rain]

No errors, it's just not working

[rotund token]

We use input system at work in a released title no issue

How are you setting it up?

[rustic rain]

in a system

[rotund token]

Via the c# code generation then just new() +?

Hmm you've got your enable

[rustic rain]

so, basically after loading scene - no logs are registered

not even before loading scene

[rotund token]

Is your asset being included, wonder if that matters for c# anyway

[rustic rain]

well, it works in editor

perfectly fine

just not in build

[rotund token]

Just wondering if the asset isn't referenced its being excluded or something

I honestly don't know if it's needed or not

[rustic rain]

It's referenced in System

and system only

[rotund token]

You're referencing the code generated not the actual asset

Anyway I don't think it matters

Mono build?

[rustic rain]

how do I check?

[rotund token]

Project settings

[rotund token]

If you haven't changed it to il2cpp it'll be mono

What version you on?

[rustic rain]

2021.2.7f1

[rotund token]

Of input system

1.0.2 or later?

[rustic rain]

1.2.0

[rotund token]

Hmm not sure then sorry. I know there were a few issues in 1.0.x that I thought we fixed in 1.2

This is certainly not an uncommon issue though

Anyway I must sleep gl with it

[graceful mason]

just bought this so off to learn mono for a few weeks less dumb qs coming through 😄
https://www.udemy.com/course/awesome-builder-defender-game-in-unity/

[haughty rampart]

anyone know how i can run a simple job x amount of times?

[rustic rain]

Job.WithCode and just add some counter?

[haughty rampart]

addendum: i need to schedule them for parallel

[karmic basin]

Just to make sure, do you make your build from the build configuration asset instead of the Build menu ?

[rustic rain]

nnnope

[karmic basin]

https://docs.unity3d.com/Packages/com.unity.entities@0.17/manual/install_setup.html

[rustic rain]

I have a feeling build configuration inspector is broken

no matter what you press at this point

this window is static

ok, so appears it's partially broken. Even tho component list is invisible, I can still click them in correct order.
Any tip in what category can I find Pipeline component?

So I can fix it

[graceful mason]

@rustic rain you installed say? https://docs.unity3d.com/Packages/com.unity.platforms.windows@0.10/manual/index.html

[rustic rain]

yeah

that's what I mean

after clicking one of categories

I still only see categories

yet I can blindly pick actual components

So I just added all of them

[graceful mason]

then you did a "Classic Build Configuration" asset for each platform (via the "Assets > Create > Build" menu). The properties of that asset will contain a "Scene List", which is the only way of adding subscenes to a standalone project. Make sure you add at least one scene or that the "Build Current Scene" checkbox is toggled on.

[rustic rain]

oooh

man

now I found how to create not empty kek

[rustic rain]

do I need to include in scene list subscenes too?

[graceful mason]

not sure soz

you need to make sure you add all your scenes otherwise your next levels wont load 😄

I know that much

[rustic rain]

any tip how to choose where to build using this?

cause after click:
Add Component -> Global
I see this:

[karmic basin]

Looking for this one I guess ?

[rustic rain]

yeah

[karmic basin]

Inside Unity.Build.Common

[rustic rain]

what order?

[karmic basin]

the third one for me

[rustic rain]

halleluya

looks like build works ok

it loads, it's not broken

even textures are ok

[karmic basin]

So you're saying the build config component is glitched ? In 2021 ?

[rustic rain]

yeah

[karmic basin]

ok good to know

[rustic rain]

Once it's open it's static picture, you only see category folders

if you click one - nothing changes, besides

clicking on first - will actually add whatever component is there

[karmic basin]

frustrating

[rustic rain]

ngl, all those annoying things make me want to go back to OOP for a while. At least until we see dots beta

[haughty rampart]

i've got this struct here:

    private struct ReturnValues
    {
        internal long _seed;
        internal NativeArray<Materials> _lc;
        internal long _lcProbability;
        internal NativeArray<Materials> _ap;
        internal long _apProbability;
    }

why can i not use that in a NativeList?

[coarse turtle]

NativeArray contains a DisposeSentinel which is a class so it can't be contained in a NativeList

[karmic basin]

Can't use a safe container inside another one

[coarse turtle]

Could always alias another struct to the native array's pointer 👀

[haughty rampart]

How would I go about this then?

[coarse turtle]

Something like this can work

unsafe struct UnsafeArrayWrapper<T> where T : unmanaged {
  [NativeDisableUnsafePtrRestriction]
  public void* Ptr;
  public ushort Capacity;

  // Add your get/set if you want read/write bracket accessors
  public this T[int i] => ((T*)Ptr)[i];

  public UnsafeArrayWrapper(NativeArray<T> values) {
    Ptr = values.GetUnsafePtr();
    Capacity = (ushort)values.Length;
  }
}

[haughty rampart]

Ok, nice to know. Thx

[last swan]

I have a global Status I want to check - when this is not the required Status the System should not run at all.
In the System I have much code and a Entities.ForEach loop, so I don't know if I could use anything for Update Requirements? This is how I do it currently (with the system running constantly)

    protected override void OnUpdate()
    {
      if (currentStatus != Status.RequiredStatus)
      {
        return;
      }

      // some other code
      // and a Entities.WithAll<ManyComponents>().ForEach().ScheduleParallel();
    }

[dense crypt]

That's how we did in my company for a few systems that we needed to be conditionally run

But we usually used a query with CalculateChunkCount()