#archived-dots | Official Unity Discord | Page 216

north bay Apr 21, 2021, 7:59 PM

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Yea that's what I meant

night venture Apr 21, 2021, 7:59 PM

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afaik, that should work...

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fyi: after restarting unity, same behaviour

north bay Apr 21, 2021, 8:00 PM

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There has to be something else messing with your tag

night venture Apr 21, 2021, 8:01 PM

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find references only return 2: when creating the entity on another system onstartrunning and here...

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should the ecb be created inside the foreach?

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i already tried getting entity by ref, without success

north bay Apr 21, 2021, 8:02 PM

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You are saying that this is printing the entity twice?

{
    struct Component : IComponentData { }

    private EndSimulationEntityCommandBufferSystem m_barrier;
    
    protected override void OnCreate( )
    {
        m_barrier = World.GetExistingSystem<EndSimulationEntityCommandBufferSystem>( );
        EntityManager.CreateEntity( typeof( Component ) );
    }

    protected override void OnUpdate( )
    {
        var commandBuffer = m_barrier.CreateCommandBuffer( );

        Entities.WithAll<Component>( ).ForEach( ( Entity e ) =>
        {
            commandBuffer.RemoveComponent<Component>( e );
            Debug.Log( $"Entity({e.Index}:{e.Version})" );
        } ).Run( );
    }
}

night venture Apr 21, 2021, 8:03 PM

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copiying...

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yes, its doing it

north bay Apr 21, 2021, 8:05 PM

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Do you have multiple worlds running?

night venture Apr 21, 2021, 8:05 PM

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...maybe...? xD

north bay Apr 21, 2021, 8:05 PM

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The EntityDebugger should show if you do

night venture Apr 21, 2021, 8:10 PM

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tbh, i dont know how to use it...but i dont see anything...photo?

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in fact, if i pause the game, the second time is when I hit the next photogram, so +1 for the ecb being delayed theory...

north bay Apr 21, 2021, 8:15 PM

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When clicking on the button that states "ClientWorld" you get a dropdown that should list you the worlds.

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The commandBuffer won't be delayed it updates in the same interval as the system

hollow sorrel Apr 21, 2021, 8:17 PM

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Script — Today at 9:44 PM
Uhhh are you mixing the FixedStepSimulationSystemGroup with one of the other groups?

make sure this isn't the case, check what groups your system is in with entitydebugger

night venture Apr 21, 2021, 8:17 PM

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only default world plus a bunch of loadingsworld empty

north bay Apr 21, 2021, 8:19 PM

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If it would be delayed 50% of my code dependent on command buffers would be broken

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Which are around 20-30 systems

night venture Apr 21, 2021, 8:19 PM

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...options?

north bay Apr 21, 2021, 8:19 PM

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They are working fine since 5+ months

night venture Apr 21, 2021, 8:19 PM

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doctor?

north bay Apr 21, 2021, 8:20 PM

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🤷‍♂️

ocean tundra Apr 21, 2021, 8:20 PM

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@night venture You could try coding in a Debug Break before your Foreach and again after

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confirm exactly how many entities you have, make sure theres no duplicates

night venture Apr 21, 2021, 8:21 PM

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1 entity 1 system...i think i cant remove anything more xD

ocean tundra Apr 21, 2021, 8:21 PM

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and look at all the entity inspectors, the systems window shows how many 'matches' it has so good idea to confirm that

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unless its a new empty project I dont think you can assume theres nothing else

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oh and clear the library folder too

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I've had some compiled older version of a system hang around somehow

night venture Apr 21, 2021, 8:23 PM

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fresh project...see u in a while xD

hollow sorrel Apr 21, 2021, 8:24 PM

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from everything you said it sounds like your system is running twice in the same frame

ocean tundra Apr 21, 2021, 8:24 PM

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yea thats what i thought too

night venture Apr 21, 2021, 8:24 PM

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its not, cause it doesnt happen until i click next if paused

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it is entering twice cause the ecb hasnt run yet, but it doesnt run a third time

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so my ecb is delayed by 1 frame 😛

ocean tundra Apr 21, 2021, 8:26 PM

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where is your system in the UpdateOrder and what ECB system is it using?

north bay Apr 21, 2021, 8:26 PM

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If you see the same behaviour in a fresh project with the code I posted above you need to start worrying

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Do you use a custom bootstrap?

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Are you recreating worlds?

night venture Apr 21, 2021, 8:27 PM

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@north bay yes, no, no.

night venture Apr 21, 2021, 8:27 PM

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ocean tundra where is your system in the UpdateOrder and what ECB system is it using?

nothing set, commandBufferSystem = World.GetOrCreateSystem<EndSimulationEntityCommandBufferSystem>();

hollow sorrel Apr 21, 2021, 8:27 PM

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what does that mean you click next when paused

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use breakpoints, debug.log frame numbers

night venture Apr 21, 2021, 8:28 PM

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when you hit pause+play, it show the scene and run the first frame

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then you click next and the next frame is run

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and there is when it magically "enters"

ocean tundra Apr 21, 2021, 8:29 PM

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Subscenes? or ConvertToEntity?

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with the same trigger component?

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Did you take @north bay's code, make a NEW system and NEW Component type to test?

night venture Apr 21, 2021, 8:30 PM

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nothing, nothing, nothing...
yes, used @north bay code and happened...almost ended creating the fresh project

ocean tundra Apr 21, 2021, 8:32 PM

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and in the systems window it only appears once?

night venture Apr 21, 2021, 8:32 PM

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fresh project, same code, it works

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🤬

ocean tundra Apr 21, 2021, 8:33 PM

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Werent you trying todo some weird custom OnCreate loop awhile ago?

night venture Apr 21, 2021, 8:33 PM

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ocean tundra Werent you trying todo some weird custom OnCreate loop awhile ago?

not that i remember...

ocean tundra Apr 21, 2021, 8:33 PM

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must have been someone else 😛

night venture Apr 21, 2021, 8:33 PM

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im messing with dynamicbuffers today

north bay Apr 21, 2021, 8:34 PM

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night venture fresh project, same code, it works

So you didn't break the matrix after all huh

ocean tundra Apr 21, 2021, 8:34 PM

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well, no clue whats happening, You need to investigate all your existing systems and try figure out whats going on

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try disabling EVERYTHING else

night venture Apr 21, 2021, 8:35 PM

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north bay So you didn't break the matrix after all huh

it would have a great feeling if this was also broken, cause i would have decided going to sleep xD

night venture Apr 21, 2021, 8:35 PM

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ocean tundra try disabling EVERYTHING else

no...im sticking to this new project xD

north bay Apr 21, 2021, 8:35 PM

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Try adding Debug.Log( this.GetHashCode( ) );
To the OnUpdate of the system I posted and see if it matches

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To fully rule out my multiple world theory

north bay Apr 21, 2021, 8:36 PM

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night venture no...im sticking to this new project xD

Oh I guess lol

night venture Apr 21, 2021, 8:58 PM

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Before the whole system went crazy I was messing with dynamic buffers, and I was trying to achieve a specific task:
systemA creates the entity A with a dynamic buffer of 10 elements (waypoints)
systemB must check those items and add some others in the middle (intermediate waypoints)

tried creating a new dynamicbuffer to replace the older or to clean+iterate, but it didnt work, as memory wasn't allocated according to internals.
tried using buffer.insert, but as the system uses i-1/i+1 (index), it didnt work as was accesing non-yet created waypoints.
tried using a native list, but seems the entities are not created before the list is copied to the buffer...(using ecb inside foreach...)

can you think a simpler/better approach to solve the task ?

ocean tundra Apr 21, 2021, 9:07 PM

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you can use ECB setbuffer

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that will replace the buffer

night venture Apr 21, 2021, 9:11 PM

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could you please elaborate? do you mean when using foreach+buffer is a copy (as Translation) and i have to write local changes to entity?

tight blade Apr 21, 2021, 9:24 PM

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does anyone know offhand if this kind of defensive JobHandle combining is necessary?

Do I have to combine with the original dependency each time considering the jobhandle I pass in already in theory includes that original dependency?

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I feel like I've just always done it. Maybe I determined there was a reason for it at one point, but I certainly dont remember

night venture Apr 21, 2021, 9:27 PM

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as far as i can remember, when i tried to split things apart, it didnt work.
eg:

var foo = new somethingJob{...};
foo.schedule(..., foo); //ERROR

so i ended using dependency as a one line declaration-usage (as seems its declared by parent)

tight blade Apr 21, 2021, 9:29 PM

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thats not what I meant, I'm afraid. My question is about whether or not it was necessary for that second job to depend on Dependency, since it also depended on something else that depended on Dependency

night venture Apr 21, 2021, 9:30 PM

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tight blade thats not what I meant, I'm afraid. My question is about whether or not it was ...

sorry. no clue.

north bay Apr 21, 2021, 9:35 PM

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tight blade thats not what I meant, I'm afraid. My question is about whether or not it was ...

As far as I'm aware, yes you need to. It has to include the dependencies for the TypeHandles which are fetched when you get the Dependency property

ocean tundra Apr 21, 2021, 9:35 PM

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@tight blade No you dont need todo that

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😛

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2 seprate answers

tight blade Apr 21, 2021, 9:35 PM

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lol. good.

north bay Apr 21, 2021, 9:35 PM

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Choose the one you like more

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lol

ocean tundra Apr 21, 2021, 9:35 PM

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i think if Job A has dependancy as a input then job B dosnt need to combine A handle + dependancy

tight blade Apr 21, 2021, 9:35 PM

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Well, at least I feel affirmed that it wasn't an obvious answer

ocean tundra Apr 21, 2021, 9:36 PM

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BUT you should combine the outputs back into Dependancy at the end

tight blade Apr 21, 2021, 9:36 PM

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that, at least, I definitely am aware of

north bay Apr 21, 2021, 9:38 PM

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ocean tundra 2 seprate answers

Easy way to figure out tbh. Don't do it and see if the jobdebugger yells at you when you schedule another system that uses those component types

tight blade Apr 21, 2021, 9:39 PM

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I use a lot if unsafe pointers, so my job debugger often just washes its hands of me

night venture Apr 21, 2021, 9:45 PM

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@ocean tundra could you please elaborate? do you mean when using foreach+buffer is a copy (as Translation) and i have to write local changes to entity?

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im probably not explaining the issue properly, and althoug there may exist workarounds, this ecb thing is giving me headaches today

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systemA add source and destination+ component ready4pathfinding

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systemb creates the pathfinding buffer and should replace existing buffer(source/destination)

north bay Apr 21, 2021, 9:49 PM

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Your problem was that you did add invalid entities to the dynamic buffer right?
EntityCommandBuffer has a method that is called SetBuffer. That method returns a empty DynamicBuffer<T> which you can add your elements to. At playback that dynamic buffer will overwrite the content of the previous DynamicBuffer<T> on the entity. That playback should handle deferred (the ones created by the entity command buffer) entities correctly.

night venture Apr 21, 2021, 9:49 PM

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but, it seems entities (created by ecb) dont exist when added to buffer

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so setbuffer replaces the buffer with the resulting one when entities.foreach has ended?

north bay Apr 21, 2021, 9:52 PM

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It replaces the buffer once the command buffer is played back

safe lintel Apr 22, 2021, 2:22 AM

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are shared components automatically distributed or is there more to something than just using AddSharedComponentData to an entity?

sage mulch Apr 22, 2021, 3:07 AM

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Hi, I'm using an array of 26 bools within a job to store some data, just for within the job. Will need to reset all of the bools to false multiple times within the same job. Is there a way to set a nativecontainer to "false"/0 for all elements within it quickly, rather than iterating over all of its elements and setting them to false individually (like wiping the memory its using to 0 across the board)? Or is there a better way to do this, like using the first 26 bits of 4 bytes and setting them to 0/1 etc

zenith wyvern Apr 22, 2021, 3:15 AM

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sage mulch Hi, I'm using an array of 26 bools within a job to store some data, just for wit...

There's https://docs.unity3d.com/Packages/com.unity.collections@0.15/api/Unity.Collections.NativeBitArray.html

unborn totem Apr 22, 2021, 3:21 AM

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hey all, been awhile since I've last messed around in DOTS, is there a specific Unity version it's best to work in at the moment?

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Trying to get a project last used in 2020.1 beta build working where I used the SubScene and "ConvertToEntity" workflow

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but I can't remember if I ever figured out how to get the whole SubScene and "ConvertToEntity" workflow working outside of the Editor, so I figured I'd just try and upgrade it to whatever stuff is happening now instead

unborn totem Apr 22, 2021, 3:56 AM

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I think I forgot ECS requires using a different way to build to get SubScenes to work

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requires these Build Configuration assets, right?

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it's why I feel like I should update, I feel like it's possible this whole workflow has changed by now 😅

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yep, there's my SubScenes folder of binary subscene data...man it's hard to remember this stuff when you put it down for a year LUL

light mason Apr 22, 2021, 6:01 AM

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Can I use hybrid rendered with regular URP

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Basically I’m trying to find out what hybrid doesn’t and does not support in URP

zenith wyvern Apr 22, 2021, 6:03 AM

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light mason Basically I’m trying to find out what hybrid doesn’t and does not support in URP

https://docs.unity3d.com/Packages/com.unity.rendering.hybrid@0.11/manual/hybrid-renderer-versions.html#feature-support

light mason Apr 22, 2021, 6:04 AM

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Ty

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Ok so let’s say I enter a area where I really need to use reflection prob

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Can I just not use hybrid for those particular objects

remote crater Apr 22, 2021, 6:08 AM

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I'm sad because I made a huge video game, super high quality in my books using DOTS/ECS. It works perfectly in the editor, but when I try and make a stand alone, it errors out and won't run. I cannot downgrade my unity because every single version errors out. My project without library/temp is 17 gig, so every time I port it, it takes 2 hours. I tried so many versions over 5 days, I would say I put 40 hours of trial and error there, but I'm ramming my head against a brick wall. I feel like I have a really huge hit on my hands, but I can't even release it to go live. Just when you thought you crossed the finish line the goal line moves and a brick wall appears between you and it. I've done my part. I've coded an awesome game. Will Unity do their part and make a 2021 alpha version that allows DOTS? I can't even get my unity to load alpha 11,12,13, because errors many other people are having. I choose Alpha to do DOTS/ECS the new technology because I thought I had to.

If I can't downgrade, how long do I expect to be waiting? I have like 5 devs working on the project now that I called in when I got it working[wo standalone]. But they may run out of steam when I'm not pushing forward anymore.

I like coding. I do not like being stuck on a technical brick wall with no one to help me. Can we use DOTS/ECS with alpha soon? After all, alpha infers your latest technologies, AKA DOTS/ECS.

light mason Apr 22, 2021, 6:11 AM

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Hang in there @remote crater

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Freaking sad to read your struggles

remote crater Apr 22, 2021, 6:13 AM

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Upgraded to .14: Library\PackageCache\com.unity.platforms@0.10.0-preview.10\Editor\Unity.InternalAPIEditorBridge.012\EditorGUIBridge.cs(15,45): error CS0426: The type name 'HyperLinkClickedEventArgs' does not exist in the type 'EditorGUILayout'

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That is the same error I got on .13,.12,.11

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Maybe .14 could compile to standalone, but that is the one error I get I can't pass. My choices are "Wait for a version that works", or "Someone help me past that error."

light mason Apr 22, 2021, 6:20 AM

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Long shot but have you tried blowing away you packageCache ?

wheat blade Apr 22, 2021, 6:40 AM

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It's mentioned here, they concluded it's because Entities isn't supported in 2021:
https://forum.unity.com/threads/upgrading-to-2021-2-0a11-breaks-entities-0-17-0-preview-41-package.1085771/

Unity Forum

Bug - Upgrading to 2021.2.0a11 breaks Entities 0.17.0-preview.41 pa...

After upgrading to 2021.2.0a11 (from 2021.2.0a10), my project will no longer load. I receive the following error message:...

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The situation sounds.... confusing

deft stump Apr 22, 2021, 7:24 AM

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"the future of Unity" is no longer compatible with future versions of Unity

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quite worrying

wheat blade Apr 22, 2021, 7:26 AM

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Yeah, I don't get this whole area. Nor why they're being so cryptic about it. Saying barely anything almost seems worse than nothing too.

deft stump Apr 22, 2021, 7:29 AM

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it's kinda like...

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they're embarrassed or something

wheat blade Apr 22, 2021, 7:30 AM

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It very much gives the impression that a serious mistake was made somewhere

deft stump Apr 22, 2021, 7:31 AM

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in either case being transparent about the actual situation should be considered.

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DOTS will slowly die at this rate if they just keep drip feeding us

wheat blade Apr 22, 2021, 7:32 AM

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Yes

deft stump Apr 22, 2021, 7:32 AM

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and that worries me since we've spent hours studying the bloody thing

wheat blade Apr 22, 2021, 7:33 AM

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"Won't work in 2021 until the end of the year at the earliest" is like, really bad

tulip robin Apr 22, 2021, 9:46 AM

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hey for procédural génération Noise DOTS or thread from scratch or other ?

slim nebula Apr 22, 2021, 10:11 AM

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Procedural generation of noise sounds like a shader graph thing

tulip robin Apr 22, 2021, 10:46 AM

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damn....

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i m going to find alone np thks for your help ^^

bright sentinel Apr 22, 2021, 10:51 AM

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safe lintel are shared components automatically distributed or is there more to something th...

Shared components are actually stored at chunk level. This means that adding the sharedcomponent just moves the entity into that chunk. If you change the value of the shared component, then you also move the entity into another chunk with that shared value (or create a new chunk if there is no chunk with that shared value)

karmic basin Apr 22, 2021, 10:53 AM

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@remote crater say again how you make your builds ? (Just to make sure you use the new workflow and not the usual way)

stiff skiff Apr 22, 2021, 10:58 AM

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Lets hope they won't do something stupid like releasing a DOTS only version of Unity (Bit like Tiny)

tulip robin Apr 22, 2021, 11:01 AM

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result = new NativeArray<int>(1, Allocator.Persistent);
// nvm for me
//this work
int *ptr = malloc(1, 4);
ptr[0] = 0x000000FF; || *ptr

//WTF ...
Unity.Collections.NativeArray`1:.ctor(Int32, Allocator, NativeArrayOptions)

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Any explain ?

stiff skiff Apr 22, 2021, 11:05 AM

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What's the question

tulip robin Apr 22, 2021, 11:05 AM

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Why constructor failed

stiff skiff Apr 22, 2021, 11:05 AM

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And what is the exception it threw

tulip robin Apr 22, 2021, 11:06 AM

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Unity.Collections.NativeArray`1:.ctor(Int32, Allocator, NativeArrayOptions)

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ctor

stiff skiff Apr 22, 2021, 11:06 AM

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That's not an exception

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Thats a part of a stacktrace

tulip robin Apr 22, 2021, 11:10 AM

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#

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same

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...

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it's exception or not ?

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it's same for Allocator.TempJob

slim nebula Apr 22, 2021, 11:15 AM

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If your fps is too high unity's own components will show this error. Try removing this code and running it. Does the error still happen?

tulip robin Apr 22, 2021, 11:16 AM

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when i remove NativeArray

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worked

slim nebula Apr 22, 2021, 11:16 AM

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Hmm

tulip robin Apr 22, 2021, 11:16 AM

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but when i need to alloc it ..

hollow sorrel Apr 22, 2021, 11:16 AM

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you're allocating but not disposing

slim nebula Apr 22, 2021, 11:16 AM

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Oh

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Yea

tulip robin Apr 22, 2021, 11:16 AM

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O.O

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disposing ?? calloc ?

slim nebula Apr 22, 2021, 11:17 AM

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The job class just isn't held by any other variables so when the job gets deallocated the native Ray member gets deallocated in the.net side which triggers the error because you haven't disposed of it on the unmanaged side

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Just call result dispose at the end of your job

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Sorry at the end of your job

tulip robin Apr 22, 2021, 11:17 AM

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ok

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when my jobs finished

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free so memory leak?

slim nebula Apr 22, 2021, 11:19 AM

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Dotnet is freeing the job class and.net is freeing the c sharp side of the native array class. This is what detects that you haven't disposed the native side of the array. This safety check only exists in the unity editor. Users of a build would never see the error

tulip robin Apr 22, 2021, 11:19 AM

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Ok when i put this its work but i have question

slim nebula Apr 22, 2021, 11:19 AM

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Surr

tulip robin Apr 22, 2021, 11:19 AM

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when i call complete my main thread is block ?

slim nebula Apr 22, 2021, 11:20 AM

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Yup

tulip robin Apr 22, 2021, 11:20 AM

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....

slim nebula Apr 22, 2021, 11:20 AM

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?

tulip robin Apr 22, 2021, 11:20 AM

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i don''t want to block my main thread...

slim nebula Apr 22, 2021, 11:20 AM

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If you want to wait until the job is done then your thread is going to wait until the job is done

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If you don't want to block your main thread then don't call . complete

tulip robin Apr 22, 2021, 11:21 AM

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but if i don't call it segfault

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xD

deft stump Apr 22, 2021, 11:21 AM

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@tulip robin are you using regular jobs or using it in entities?

slim nebula Apr 22, 2021, 11:21 AM

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If you have something that depends on the data in that job then that dependent thing needs to wait for the previous job to complete

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It's not magic

tulip robin Apr 22, 2021, 11:21 AM

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com.unity.entities

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??? O.O
simoyd, in basic Thread i don't need to call .join, i don't want to block my main thread so my game just because i m generating chunk ...

slim nebula Apr 22, 2021, 11:25 AM

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What is causing the seg fault if not some other code that needs to wait for your job? You say if your job runs then there's no segfault right? What am I missing?

tulip robin Apr 22, 2021, 11:28 AM

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Ok, step one my english is bad sorry for this.

step two: i need to generate chunk without lock my main thread.
SO complete block him == for me, just freeze and wait when it's finish...
it's same way then do sync

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@deft stump why ?

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OH

slim nebula Apr 22, 2021, 11:30 AM

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So after you're done generating a chunk you would do some other process right? To consume the data generated by the function you wrote. That process would call Complete. You wouldn't call complete right when you schedule it

tulip robin Apr 22, 2021, 11:30 AM

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i will try one thing

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handle have isCompleted

slim nebula Apr 22, 2021, 11:30 AM

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You can make a second job dependent on a first job

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So that both your generate chunk and your following process is in a background thread

tulip robin Apr 22, 2021, 11:30 AM

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yeah i already think BUT

slim nebula Apr 22, 2021, 11:30 AM

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If you call complete on the main thread it will block your main thread

tulip robin Apr 22, 2021, 11:30 AM

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you can't because job don't accept mesh etc

tulip robin Apr 22, 2021, 11:31 AM

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slim nebula If you call complete on the main thread it will block your main thread

obviously ahah 😄

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i m trying something and i will back

slim nebula Apr 22, 2021, 11:31 AM

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Xd

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I gtg 4 now

tulip robin Apr 22, 2021, 11:34 AM

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LOL

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Greedy way
thread.Start()

hollow sorrel Apr 22, 2021, 11:35 AM

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does that even run

tulip robin Apr 22, 2021, 11:35 AM

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xD right

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raaahhh not work

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😫

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north bay Apr 22, 2021, 11:41 AM

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You don't have any references to the result array which is the reason why the leak detection shows you that error. After the job completes there are no references to the allocated data anymore and there is no way for you to free the memory which is what that message makes you aware of.

stiff skiff Apr 22, 2021, 11:42 AM

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why not just call thatArray.Dispose and pass in the job handle?

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Actually, no. Why not dispose the array when you're done with the result?

tulip robin Apr 22, 2021, 11:46 AM

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#

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it's obviously greedy but ok it's work

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thks mate ❤️

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but no documentation said that 😢

stiff skiff Apr 22, 2021, 11:57 AM

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That you have to free memory that you allocate?

tight blade Apr 22, 2021, 12:57 PM

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anybody here a fair hand with raw pointers? I've got a pointer to an array that is size 2n, and I want to pass half of it into 2 different systems, so one side gets elements 0 to n, the other gets element n to 2n

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I seem to recall thats a trivial thing you can do with just, like, arithmetic on pointers

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but I dont remember how

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like I feel like you can just select the nth element, effectively, and say "here, this is the start of your n length array"

tulip robin Apr 22, 2021, 12:58 PM

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stiff skiff That you have to free memory that you allocate?

Yeah 😉

stiff skiff Apr 22, 2021, 1:05 PM

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tight blade anybody here a fair hand with raw pointers? I've got a pointer to an array that...

Is this a NativeArray ?

tight blade Apr 22, 2021, 1:05 PM

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yep!

stiff skiff Apr 22, 2021, 1:06 PM

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You might be able to use a NativeSlice then?

tight blade Apr 22, 2021, 1:06 PM

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yeah, I mean I could use nativearray operations

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yeah this is more one of those "does anyone know the particular implementation im thinking of" questions

stiff skiff Apr 22, 2021, 1:07 PM

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Pointer arithmatic is literally just using the + and - operator on a typed pointer

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so byte* test = stackalloc byte[10]; test += 5;

tight blade Apr 22, 2021, 1:08 PM

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oh, yeah, so I might just add n * size(float) or what have you

stiff skiff Apr 22, 2021, 1:08 PM

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no need for the sizeof

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unless it's a void*

tight blade Apr 22, 2021, 1:08 PM

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gotcha, that's awesome.

stiff skiff Apr 22, 2021, 1:08 PM

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float* would already have the size included when you add or substract

tight blade Apr 22, 2021, 1:09 PM

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right, yeah that makes sense. Thanks, zero!

stiff skiff Apr 22, 2021, 1:09 PM

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I would recomment using the NativeArray and Slice however to abstract away the unsafe stuff

tight blade Apr 22, 2021, 1:09 PM

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lol, im in too deep for that

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I agree with that recommendation though, for anyone else seeing this 😉

#

once I get everything working, I'll probably refactor to use more abstractions.

stiff skiff Apr 22, 2021, 1:14 PM

#

Are you dealing with interop perhaps?

remote crater Apr 22, 2021, 3:14 PM

#

Mr. K. I know you tried to help before, but I could not follow your instructions. They didn't make sense to me. To you it is obvious, but to me it is not or I'd have it working. I tried for about 8 hours alone trying to install this "WINDOWS PLATFORM" build thing, but was unable.

bright sentinel Apr 22, 2021, 3:26 PM

#

remote crater Mr. K. I know you tried to help before, but I could not follow your instructions...

Are you having any specific issues with installing the Windows Platform package?

karmic basin Apr 22, 2021, 5:04 PM

#

remote crater Mr. K. I know you tried to help before, but I could not follow your instructions...

Alright don't worry I'll try again to help. It's all explained here https://docs.unity3d.com/Packages/com.unity.entities@0.17/manual/install_setup.html#standalone-builds
This means you need to:
0. Completely IGNORE the usual Build MENU (this doesn't know what entities are) that is File > Build Settings

Install com.unity.platforms package through the package manager, & then let's say com.unity.platforms.windows to make a windows build.
Create a build asset from Assets > Create > Build menu
Click the asset from your project tab to show its inspector, like you would for any other asset. From there you will find the new Build button

#

The screenshots I posted here and there
#archived-dots message
#archived-dots message
show you what the asset and the inspector windows look like.

#

If that's installing the packages through the package manager that you have trouble with, maybe we can help with that too (sometimes it can be stubborn)

torpid mulch Apr 22, 2021, 6:06 PM

#

Hi
I'm trying to make a selection box system for my RTS game. What I'm doing is drawing a selection box on the screen, projecting the four points onto the world and creating a pyramid convex collider (the four points and camera position) and then add all colliding units to the selection script. But it seems to behaves weirdly if units have non zero rotations.

#

//initialPosition - one corner of selection box, finalPosition - Diagonally opposite corner
NativeArray<float3> vertices = new NativeArray<float3>(5, Allocator.Persistent, NativeArrayOptions.UninitializedMemory);
        vertices[0] = new float3(Camera.main.transform.position);
        vertices[1] = Camera.main.ScreenToWorldPoint(new Vector3(math.min(initialPosition.x, finalPosition.x),
            math.max(initialPosition.y, finalPosition.y), 25));
        vertices[2] = Camera.main.ScreenToWorldPoint(new Vector3(math.max(initialPosition.x, finalPosition.x),
            math.max(initialPosition.y, finalPosition.y), 25));
        vertices[3] = Camera.main.ScreenToWorldPoint(new Vector3(math.max(initialPosition.x, finalPosition.x),
            math.min(initialPosition.y, finalPosition.y), 25));
        vertices[4] = Camera.main.ScreenToWorldPoint(new Vector3(math.min(initialPosition.x, finalPosition.x),
            math.min(initialPosition.y, finalPosition.y), 25));


        BlobAssetReference<Collider> collider = Unity.Physics.ConvexCollider.Create(vertices, ConvexHullGenerationParameters.Default, 
            new CollisionFilter()
            {
                GroupIndex = 0,
                BelongsTo = 0x00000001,
                CollidesWith = 0x00000001
            }, 
            new Unity.Physics.Material()
            {
                CollisionResponse = CollisionResponsePolicy.RaiseTriggerEvents
            });
        vertices.Dispose();

        ColliderCastInput input = new ColliderCastInput()
        {
            Collider = (Collider*) collider.GetUnsafePtr(),
            Start = float3.zero,
            End = float3.zero
        };
      physicsWorld.PhysicsWorld.CastCollider(input, ref hits);

#

If units have non zero rotations, their colliders seem to be in shifted positions when I select with castCollider but I do know that they aren't since I can select them just fine with simple raycasts.

frosty siren Apr 22, 2021, 6:18 PM

#

Noob question: if i use for example EntityArchetype inside bursted lambda, which defined in system, then how can i avoid caching it's value every time before lambda scheduling?

north bay Apr 22, 2021, 6:20 PM

#

torpid mulch ```cs //initialPosition - one corner of selection box, finalPosition - Diagonall...

You probably want to pass quaternion.Identity as the ColliderCastInput orientation

torpid mulch Apr 22, 2021, 6:21 PM

#

I'll try that, I assumed it'd be default

#

👀
ITS WORKING

#

thanks 🙂

remote crater Apr 22, 2021, 6:32 PM

#

Thank you SO much MR.K! I'm gonna give that a try for a few hours. If it does not work, I am going to make a version of my game for my Starforger level designers and they have technical knowledge that they may be able to downgrade to 2020LTS. I'm no longer stuck at a brick wall because of you guys.

#

Help required to continue: I have Platforms package 0.10.0-preview.10 installed, but do not see where to install com.unity.platforms.windows. It is not in the Package Manager, and when as I said, I spent 8 hours trying to mess with manifest.json to try get it in, but failed.

safe lintel Apr 22, 2021, 6:38 PM

#

in the package manager theres a + icon, click it and type in com.unity.platforms.windows to add it

remote crater Apr 22, 2021, 6:41 PM

#

When I tried to build, I got "Empty Build COnfiguration."

#

https://starfightergeneral.com/pix/7.png

#

Thank you thelebaron I will check that.

#

looks like it is installing that package

sage mulch Apr 22, 2021, 6:51 PM

#

zenith wyvern There's https://docs.unity3d.com/Packages/com.unity.collections@0.15/api/Unity.C...

This is great, thanks

remote crater Apr 22, 2021, 6:53 PM

#

Now there is a Classic Windows configuration on the asset->create->build menu

untold night Apr 22, 2021, 6:54 PM

#

@sage mulch - there is also BitField32 and BitField64 if you have a fixed number of bits. No need to deal with safety/allocation management:

https://docs.unity3d.com/Packages/com.unity.collections@0.9/api/Unity.Collections.BitField32.html

https://docs.unity3d.com/Packages/com.unity.collections@0.9/api/Unity.Collections.BitField64.html

remote crater Apr 22, 2021, 6:55 PM

#

It appears to be compiling. I'll let you know if it does

sage mulch Apr 22, 2021, 6:58 PM

#

untold night <@!114926666098147331> - there is also BitField32 and BitField64 if you have a f...

ooo tyty

remote crater Apr 22, 2021, 7:06 PM

#

It appeared to have compiled and ran. The DOTS part threw up a bunch of errors. Still this is very very good. I can finally patch my game with new stuff for non DOTS mode. I think there is a high chance of the reason DOTS not working is because I funkified my code/scene to try and remove it. So this is very very very good. Thank you much Mr.K and thelebaron and everyone else who helped. Remember my promise: If I make it big, and you track me down somehow later, I will send you a nice ph@t Manilla envelope. hahahah, but for serious cuz I am generous.

#

Yes, this is awesome! I have a few things to patch over the past few weeks for a minor update. Today I'll work on adding power level bars on ships. 🙂 And do an update tomorrow. This is good and encouraging news for my developers. You guys rock. I'll let you know if I can get DOTS working at all.

remote crater Apr 22, 2021, 7:27 PM

#

It looks like yeah, DOTS ain't working. But it's a small victory to do a NON DOTS update, thank you.

#

DOTS work in client, but not standalone.

night venture Apr 22, 2021, 8:24 PM

#

is there any way Entities.Foreach being able to invoke a class method with burst?

north bay Apr 22, 2021, 8:25 PM

#

Only if it's static

night venture Apr 22, 2021, 8:25 PM

#

but static cant use GetComponent 😦

karmic basin Apr 22, 2021, 9:17 PM

#

No problem, do GetComponent on onUpdate and pass it as param to the static method

ocean tundra Apr 22, 2021, 9:57 PM

#

or use that GetComponentFromEntity thing

unborn totem Apr 22, 2021, 11:16 PM

#

when I build out my DOTS game that uses entities and SubScene's, do I need to keep all 3 of these binary files for SubScenes to load properly?

ocean tundra Apr 22, 2021, 11:17 PM

#

yea pretty sure you do

#

try removing them and seeing what happens?

unborn totem Apr 22, 2021, 11:17 PM

#

well I know they won't load with Bundles

#

I just wonder what the difference is between Bundles and Entities

#

it takes me 16+ minutes to build my project, so thought I'd ask if anyone knew before trying it myself

ocean tundra Apr 22, 2021, 11:18 PM

#

maybe bundles is unity stuff

#

like meshes/materials/textures?

unborn totem Apr 22, 2021, 11:18 PM

#

maybe

#

i forgot the version of DOTS I am using probably does copy the sprite sheet I am using unnecessarily

#

all of my entities are just planes that use a single (somewhat giant) spritesheet to draw a texture

#

and I have 2.12 million of those entities

#

about 100,000 per subscene

ocean tundra Apr 22, 2021, 11:20 PM

#

Ooo very nice

unborn totem Apr 22, 2021, 11:20 PM

#

so it's probably copying my spritesheet a lot

#

oh wait, it's 10,000 per subscene

ocean tundra Apr 22, 2021, 11:20 PM

#

yea dont think subscenes is very good at optmizing away unity objects

#

but maybe soon

#

😛

#

are you on a very old version?

unborn totem Apr 22, 2021, 11:21 PM

#

yeah, probably. it's a project I haven't touched in a year, I just wanted to make another build of it for my portfolio

#

i think i'm in like entities version 0.11.something

#

and I know that's up to 0.17 now

ocean tundra Apr 22, 2021, 11:22 PM

#

yup

#

and locked to 2020 LTS

unborn totem Apr 22, 2021, 11:22 PM

#

may try to update when I get more time

ocean tundra Apr 22, 2021, 11:22 PM

#

so dont go to far on the unity versions if you update

unborn totem Apr 22, 2021, 11:22 PM

#

yeah I saw that

#

strange unity versioning going on for DOTs

#

very ominous

ocean tundra Apr 22, 2021, 11:22 PM

#

yea

#

but im thinking "something" is comming

#

for now a version or 2 locked on 2020

#

but they cant stay there, as merging back into the 2021+ will be a MASSIVE pain

#

and the longer they leave the bigger pain it will be

safe lintel Apr 22, 2021, 11:49 PM

#

im not getting my hopes up, time between releases has been growing steadily while new features inversely proportionally dropped with the time between releases. considering they want more stability id only guess this could take even longer?

ocean tundra Apr 22, 2021, 11:54 PM

#

yea definitly, im expecting 6ish months for the next 2-3 versions

#

a announcement of some sort in 3ish months, but whatever their plan is we wont see it till early next year (10ish months)

safe lintel Apr 22, 2021, 11:57 PM

#

im disappointed because theyre now pursuing stability over features tbh, I want audio and pathfinding

ocean tundra Apr 22, 2021, 11:57 PM

#

me too

#

still so many core things

#

optmize tags, the enable/disable components feature

safe lintel Apr 22, 2021, 11:58 PM

#

yeah, animation is super rough, editor experience kinda sucks, im not too upset about the code workflow but obviously tons of people really dont find it appealing at all, and seemingly no changes on the horizon there

#

graphics is a weird hodge podge

ocean tundra Apr 22, 2021, 11:59 PM

#

yea that hybrid renderer

#

i really want that nice

safe lintel Apr 23, 2021, 12:00 AM

#

i saw a tweet by the hybrid team lead saying they managed 1.42ms with 100k dynamic entity stress test scene

#

https://twitter.com/SebAaltonen

#

super beefy hardware tho 😄

ocean tundra Apr 23, 2021, 12:01 AM

#

yea

#

still that would be nice to have

#

but also i love procedural stuff, so better performance for individual rendering would be nice too

safe lintel Apr 23, 2021, 12:02 AM

#

and no word on if job scheduling overhead will improve or if the job system will scale with more cores(as it gets worse in physics)

ocean tundra Apr 23, 2021, 12:02 AM

#

wait

#

it dosnt scale with more cores?

#

i just ordered a ryzen 9 5950x 😛

#

i need to use all them cores

safe lintel Apr 23, 2021, 12:04 AM

#

it sorta does and also sorta doesnt? i remember seeing 0lento mention with a similar ryzen, that perf suffered with all job workers enabled and maybe something similar on the forums

ocean tundra Apr 23, 2021, 12:04 AM

#

oh damn

safe lintel Apr 23, 2021, 12:04 AM

#

well you will be able to test it out for yourself soon😅

ocean tundra Apr 23, 2021, 12:04 AM

#

i guess the main thread scheduling begins to suffer?

#

but hopfully burstable systems will help with that

safe lintel Apr 23, 2021, 12:05 AM

#

that too was disappointing lol

ocean tundra Apr 23, 2021, 12:05 AM

#

yea it sucks atm

safe lintel Apr 23, 2021, 12:05 AM

#

a few tests didnt seem to yield any gains but then again its not yet complete so who knows

ocean tundra Apr 23, 2021, 12:05 AM

#

yea im hoping next version will add full support for jobs

#

and then maybe the one after add Entities.Foreach codegen

#

i also would realllly love to be able to update a entire world in a different thread

safe lintel Apr 23, 2021, 12:09 AM

#

after reading so many posts here regarding ForEach stuff, imo its a real shame unity decided to kill off IJobForEach, I think that taught me so much about proper job usage while being easier to digest than chunk iteration at the time. Simply starting out learning ForEach lambda has a lot of useful job stuff obfuscated, like kiwi asking how to use HasComponent from a static burst method, very easy in the regular job usage with cdfe but someone new theres like a big jump and current docs dont illustrate it well.

ocean tundra Apr 23, 2021, 12:10 AM

#

would be awesome to get my whole Server/Simulation world into background

#

they replaces IJobForEach with something else tho didnt they?

#

thats not chunk based

safe lintel Apr 23, 2021, 12:10 AM

#

afaik they havent actually released its replacement yet

#

they talked about it

ocean tundra Apr 23, 2021, 12:11 AM

#

i thought these?
https://docs.unity3d.com/Packages/com.unity.entities@0.17/manual/ecs_ijobentitybatch.html

safe lintel Apr 23, 2021, 12:11 AM

#

I dont think the IJobEntityBatch is it because thats still kind of similar to chunk usage

ocean tundra Apr 23, 2021, 12:11 AM

#

hmmm yea

#

im still at the stage where im mainly using Entities.Foreach

safe lintel Apr 23, 2021, 12:11 AM

#

Id like to be able to schedule jobs from jobs, give me a super unsafe way to try it out 🙂

ocean tundra Apr 23, 2021, 12:12 AM

#

haha nooo so much chaos

#

but if we could somehow use a old long lived thread

#

or some sort of new engine loop hooks to plug in a world to a different thread

#

i work super hard at keeping my Server world away from all the unity stuff

#

it is basily just the simulation, then pipes stuff into network/accross to local clients

safe lintel Apr 23, 2021, 12:15 AM

#

its in combination with the netcode package?

ocean tundra Apr 23, 2021, 12:16 AM

#

i guess i could run a headless unity

#

na custom netcode

#

made mainly for stragety/rts/management type games

#

managed to network the unity Boids sample the other day, 8k unoptized boids flying round 🙂

safe lintel Apr 23, 2021, 12:18 AM

#

nice, after making an fps id love to make a simulation game of some sort

ocean tundra Apr 23, 2021, 12:19 AM

#

well message me when you do, if you want networking

#

im building more samples and stuff then i want to find some 'beta' users

#

but also one of my friends has started talking game ideas, and i kinda want to try build a prototype using the networking library

safe lintel Apr 23, 2021, 12:21 AM

#

probably be forever at the rate of things 😩

ocean tundra Apr 23, 2021, 12:21 AM

#

haha yea same here 😛

#

have you done much with custom worlds

#

a big part of the idea depends on sub worlds
Think spaceship RTS with Capital ships having a internal simulation world

#

so i need a nice way to link worlds together (parent server world has captial ship entities which contain a sub internal world)

coarse turtle Apr 23, 2021, 12:32 AM

#

ocean tundra have you done much with custom worlds

I have to figure out how to do manual world creation depending on whether or not you're a client/host (I already have multiple worlds working with ICustomBootstrap) 😦

#

I don't really want to start figuring it out lol

ocean tundra Apr 23, 2021, 12:33 AM

#

yea i do that

#

its aweful 😛

#

when you create a new world you can give it a name

#

so inside the ICustomBootstrap i do if (worldName.StartsWith("Server)) or client

#

i hate it

#

we should be able to pass a object in with the world creation, so we can pass any setting we like

safe lintel Apr 23, 2021, 12:36 AM

#

ive done zero custom world stuff, I dont want to touch manual system ordering or anything like that, too much cognitive load 🥲

ocean tundra Apr 23, 2021, 12:36 AM

#

yea i get that

#

you can trigger the defult system ordering somehow. something like World.Sort or SystemGroup.Sort

#

but yea custom worlds are painful

#

im really on the fence, i 'might' be able to hack at phyics and things so that it can all exist within the same world

#

but additional worlds seem so much cleaner

#

what i want todo is create a world, store it in a component (and NOT add it into unitys auto world update) then when the server updates, dynamicly update the sub worlds (with optmizations like only update 1 sub world per frame, ect)

#

but i also need to find a nice way to sync data between them, maybe passing around a ECB?

#

meh, all random ideas ATM, i need to get hybrid entities working in my netcode first

coarse turtle Apr 23, 2021, 12:44 AM

#

Did you disable automatic initialization for your worlds?

ocean tundra Apr 23, 2021, 12:44 AM

#

No I leave it on

#

And unity creates the default world

coarse turtle Apr 23, 2021, 12:44 AM

#

Ah - yeah I'm looking to turn that off

ocean tundra Apr 23, 2021, 12:45 AM

#

Then from that I trigger additional worlds

#

There's a define you can add

#

Something like, disable world initialization or something

coarse turtle Apr 23, 2021, 12:45 AM

#

yeah something like that

sage mulch Apr 23, 2021, 2:11 AM

#

untold night <@!114926666098147331> - there is also BitField32 and BitField64 if you have a f...

In regards to BitField32, does anyone know why I'm getting a strange value when I try to print the BitField32 next to its .Value? For instance, this screenshot prints the bitfield followed by its Value when converted to decimal, but when I plug those bits into any binary->decimal calculator online I get completely different numbers:

#

Converted to decimal, those bits should become 3963910912 in decimal

#

oh huh

#

they're reversed

#

should have checked that first

#

is that normal for this kind of bit struct?

#

Guess I was treating it too much like an array

ocean tundra Apr 23, 2021, 2:13 AM

#

no clue

#

ive been bitpacking manually

sage mulch Apr 23, 2021, 2:14 AM

#

As in, not using these provided structs?

ocean tundra Apr 23, 2021, 2:14 AM

#

yup

sage mulch Apr 23, 2021, 2:15 AM

#

got it, i'll have to look into that

ocean tundra Apr 23, 2021, 2:15 AM

#

that way i can get my sizes a bit smaller

sage mulch Apr 23, 2021, 2:15 AM

#

that makes a lot of sense

#

i only need 26 bits

ocean tundra Apr 23, 2021, 2:15 AM

#

ill see if i can find the link

#

here

#

https://www.jacksondunstan.com/articles/5393

JacksonDunstan.com | Adding Bit Fields to C#

JacksonDunstan.com covers game programming

#

26 is annoying

#

you cant really save there

#

smallest we can pack into is a byte

sage mulch Apr 23, 2021, 2:17 AM

#

yep that was my thoughts too lol

#

thanks for the link tho

#

i'm sure it will come in handy later

ocean tundra Apr 23, 2021, 2:17 AM

#

which is 8 bits (8 values) so 26/8 = 3.25 and you need to round up so 4

#

same size as a that 32 bit field

#

😛

#

out of interest what are you bit packing?

sage mulch Apr 23, 2021, 2:32 AM

#

neighbors for a voxel

#

trying to determine a certain kind of shape for a voxel based on its neighbors

#

just need a flag for whether a neighbor is solid or not, and in my case there are 26 "neighbors"

ocean tundra Apr 23, 2021, 2:33 AM

#

ok cool

#

you sould def look at that link then

#

you could probably bit pack something else into the spare 6 bits

#

you can fit 64 numbers in that

#

maybe enough for voxel type?

sage mulch Apr 23, 2021, 2:36 AM

#

ooh i like that a lot

#

thank you

#

first comment is by another Liam 😂 must be a sign

ocean tundra Apr 23, 2021, 2:38 AM

#

tho 64 block types is kinda low

#

but if you added 1 more byte you get a TON of numbers

sage mulch Apr 23, 2021, 2:40 AM

#

tru

ocean tundra Apr 23, 2021, 2:40 AM

#

like 16k

#

😛

#

that feels like 2 many

#

lots of cool things you can do with bit packing

#

how many voxels can you fit in a entity/chunk?

#

when i was 'planning' voxels out i could almost get 16*16*16 in

sage mulch Apr 23, 2021, 3:32 AM

#

same so far altho i haven't really messed with it

#

tbh i'm not worried about size at this point, more trying to get my mesh generating correctly hahaha

#

i've been jumping around with differing methods, marching cubes, wave function collapse, brute force lol

#

none of them completely fit but im back with just writing out each case manually

ocean tundra Apr 23, 2021, 3:33 AM

#

😛

#

you should worry a bit about size

#

if 1 entity ends up being bigger then a chunk you will have errors

#

which is 16kb

sage mulch Apr 23, 2021, 4:06 AM

#

that's a good point

sharp flax Apr 23, 2021, 12:51 PM

#

I got a math static class for jobs, which exclusively uses Unity's math library. I don't need to add the burstcompile attrib on that class right? it'll be burst compiled already as long as the job using those methods is tagged with burstcompile

north bay Apr 23, 2021, 1:09 PM

#

Ye

jaunty herald Apr 23, 2021, 6:41 PM

#

Are tuples supported in burst jobs nowadays?

#

It doesn't see to be throwing an error for me on compilation

solid rock Apr 23, 2021, 6:58 PM

#

jaunty herald Are tuples supported in burst jobs nowadays?

I don't see why not. They're just unnamed structs right? Was there a time they weren't supported?

jaunty herald Apr 23, 2021, 6:59 PM

#

Yeah, burst does not support structs with auto layout

solid rock Apr 23, 2021, 6:59 PM

#

ah

jaunty herald Apr 23, 2021, 6:59 PM

#

Or it didnt use to

#

Not sure if there is now some magic going on in the background or something

north bay Apr 23, 2021, 7:08 PM

#

Support for them got added in 1.5 if I remember correctly

safe lintel Apr 23, 2021, 8:35 PM

#

anyone know if you can use setcomponent with a nativearray of componentdata? in a similar way to instantiating with a nativearray?

robust scaffold Apr 23, 2021, 8:41 PM

#

safe lintel anyone know if you can use setcomponent with a nativearray of componentdata? in ...

NativeArray is like a regular array. Just read and write like the elements are just normal structs.

robust scaffold Apr 23, 2021, 8:41 PM

#

safe lintel anyone know if you can use setcomponent with a nativearray of componentdata? in ...

Same if it's GetComponentDataFromEntity<>(), it's just a regular array except now the indices are entities.

ocean tundra Apr 23, 2021, 8:41 PM

#

😛

safe lintel Apr 23, 2021, 8:41 PM

#

im talking about a batch operation rather than reading and writing every element in a loop

robust scaffold Apr 23, 2021, 8:43 PM

#

safe lintel im talking about a batch operation rather than reading and writing every element...

I dont believe there's an equivalent batch operation with entities with an native array.

#

I really wish there was. Makes my entity creation a lot simplier but instead a we need to use a bunch of foreach.

safe lintel Apr 23, 2021, 8:46 PM

#

yeah the comparison of entity creation in the best practises highlights instantiation optimization, but then after that for setting or adding components I guess theres just nothing?

robust scaffold Apr 23, 2021, 8:46 PM

#

You can probably make an extension function but it'll just be a foreach loop rather than something bursted.

safe lintel Apr 23, 2021, 8:46 PM

#

was hoping I was overlooking something

robust scaffold Apr 23, 2021, 8:47 PM

#

Yea, it's nothing at all. Incredibly annoying to type out var entity = entityManager.CreateEntity(typeof()); and then entityManager.SetComponent(entity, new()) every single fucking time.

#

If I could burst populate then burst set entity components, what would be amazing. But no.

ocean tundra Apr 23, 2021, 8:48 PM

#

i would like a batched version of the ECB

robust scaffold Apr 23, 2021, 8:48 PM

#

Welllll, I could technically using an unmanaged system. But that's even more pain.

ocean tundra Apr 23, 2021, 8:48 PM

#

many of those methods have batch versions on entity manager

#

@safe lintel wait theres this
https://docs.unity3d.com/Packages/com.unity.entities@0.17/api/Unity.Entities.EntityManager.AddComponentData.html#Unity_Entities_EntityManager_AddComponentData__1_Unity_Entities_EntityQuery_Unity_Collections_NativeArray___0__

#

that looks like what your after

safe lintel Apr 23, 2021, 8:49 PM

#

ahh

robust scaffold Apr 23, 2021, 8:49 PM

#

That's add component. Will error out if you already have that component on the entity

safe lintel Apr 23, 2021, 8:50 PM

#

oh my other caveat was like to do this with a native array of entities

#

lol

robust scaffold Apr 23, 2021, 8:50 PM

#

There's no equivalent SetCompnent(EntityQuery)

ocean tundra Apr 23, 2021, 8:50 PM

#

like 2 native arrays? one of entitys and one of data

#

hmm annoying theres no set component version

#

thats kinda dumb

robust scaffold Apr 23, 2021, 8:51 PM

#

Thank unity

#

I mean, you can do it technically using a ForEach()

ocean tundra Apr 23, 2021, 8:51 PM

#

you could probably do the asmref trick and add your own to entity manager

safe lintel Apr 23, 2021, 8:51 PM

#

something like that, like you use entitymanager to instantiate a nativearray of entities, then also add component on that subsequent resulting batch entities but not the entire query?

ocean tundra Apr 23, 2021, 8:51 PM

#

as the code must exist within that AddComponent version somewhere

robust scaffold Apr 23, 2021, 8:52 PM

#

safe lintel something like that, like you use entitymanager to instantiate a nativearray of ...

Instantiate those entities with an empty unique (to that nativeArray of entities) Tag, then do a Entities.With<Tag>().ForEach() and set the components?

#

Maybe the Tag should have a single int called Index which corresponds to the native array index.

ocean tundra Apr 23, 2021, 8:53 PM

#

yea i kinda have that pattern too,
My prefabs get a tag added to them in conversion,
Runtime i have a WithAll<TAG> ..... then ECB.RemoveTag

#

so i can do my 'init' logic

robust scaffold Apr 23, 2021, 8:54 PM

#

Then use that tag index to sample the native array, get the component data from the NA, then write to the actual entity. Then outside the ForEach or using a ECB, remove the tag. That's what I do with some of my logic.

#

Not the best, I prefer to set the component data at instantiation. Get the data array first then create the entity.

safe lintel Apr 23, 2021, 8:55 PM

#

thanks, will have to experiment but seems like there should be a more obvious and direct way

ocean tundra Apr 23, 2021, 8:55 PM

#

yup

#

the whole ECB/EntityManager api needs some love

#

its 'good'

#

but could be so much better

robust scaffold Apr 23, 2021, 8:56 PM

#

I wouldnt say "good". It works but has so much boilerplate.

#

Probably because it isnt built into the core of C#, rather working around with the limitation of the language.

#

If it could be as easy as object creation and setting, that would be amazing.

ocean tundra Apr 23, 2021, 9:12 PM

#

maybe some super fancy code gen could get us there

#

but since we have to use structs i dont think it will ever be like object creation

#

Also which sounds better:
Arc Networking
OR
Arc Multiplayer

robust scaffold Apr 23, 2021, 9:19 PM

#

ocean tundra Also which sounds better: Arc Networking OR Arc Multiplayer

Networking

#

Sounds more professional

safe lintel Apr 23, 2021, 9:20 PM

#

agreed

ocean tundra Apr 23, 2021, 9:21 PM

#

Sweet ty

ocean tundra Apr 23, 2021, 9:36 PM

#

ok, so how do we kill off companion/hybrid components?

#

im adding support for hybrid to my networking BUT i only want them to be for the client world, server world should remove/disable all hybrid components from its entities/prefabs

#

last i looked at this CompanionLink was private/internal

#

and it still is 😦

coarse turtle Apr 23, 2021, 9:54 PM

#

ocean tundra ok, so how do we kill off companion/hybrid components?

i forget if remove component works on the hybrid component

safe lintel Apr 23, 2021, 10:36 PM

#

ah finally resolved my gc issues with compute buffer, so at long last my use of drawmeshinstancedindirect doesnt trigger gc constantly allocating buffers!

#

https://gfycat.com/concernedbleakbudgie getting closer to being able to ditch gameobject particle/vfx systems and spawn/destroy these things only in entities

Gfycat

m07gRVktDg

▶ Play video

ocean tundra Apr 23, 2021, 10:38 PM

#

very nice

#

@coarse turtle Yea i think i just need to remove the component, not sure if it works but will test shortly

#

hopfully it removes the GO too

#

so remove component does NOT actually remove the GO/delete the component

#

and because CompanionLink is internal destorying the GO myself causes things to break

ocean tundra Apr 23, 2021, 11:25 PM

#

ewwww 😛

#

        {
            _serverSpritesQuery = GetEntityQuery(typeof(SpriteRenderer));


            _type = Type.GetType("Unity.Entities.CompanionLink, Unity.Entities.Hybrid, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null");
            _componentType = (ComponentType) _type;
        }

        protected override void OnUpdate()
        {
            Entities.ForEach((Entity e, SpriteRenderer sr) =>
                {
                    GameObject.Destroy(sr.gameObject);
                })
                .WithoutBurst()
                .Run();
            
            EntityManager.RemoveComponent(_serverSpritesQuery, _componentType);
            EntityManager.RemoveComponent<SpriteRenderer>(_serverSpritesQuery);
        }```

light mason Apr 24, 2021, 1:28 AM

#

What happens to DOTS audio

robust scaffold Apr 24, 2021, 1:59 AM

#

light mason What happens to DOTS audio

It's dead Jim.

light mason Apr 24, 2021, 2:48 AM

#

What ?

#

@robust scaffold

#

Do you have a post or blog I can read

ocean tundra Apr 24, 2021, 4:14 AM

#

@light mason Its not dead, just no updates/news/progress

light mason Apr 24, 2021, 4:14 AM

#

O ok

#

Ty

ocean tundra Apr 24, 2021, 4:14 AM

#

it 'could' be dead

#

😛

light mason Apr 24, 2021, 4:14 AM

#

Lol

ocean tundra Apr 24, 2021, 4:14 AM

#

but i expect thats unlikly

#

just not the focus of the DOTS team atm

gusty comet Apr 24, 2021, 10:29 AM

#

hello

#

there are 2 sets of entities under different parents, can they be in same chunks?

#

theyre same type

ocean tundra Apr 24, 2021, 10:33 AM

#

Yea they will be in the same chunk

gusty comet Apr 24, 2021, 10:35 AM

#

ah nice

gusty comet Apr 24, 2021, 10:51 AM

#

what r these numbers? https://i.imgur.com/bwG7mOW.png

Imgur

#

i thought theyre amount of chunks but prob not cause

#

one chunk has just scene in it and it displays big number

#

also is Schedule actually faster than scheduleparralel?

#

reaching more fps with schedule but i cant tell

karmic basin Apr 24, 2021, 11:46 AM

#

gusty comet what r these numbers? https://i.imgur.com/bwG7mOW.png

https://forum.unity.com/threads/chunk-info-ui-explained.586729/

Unity Forum

Chunk info UI explained

I can't say that this chunk info UI is intuitive, hope it is not a final design...
it was not very obvious for me from the first look what each its...

gusty comet Apr 24, 2021, 12:07 PM

#

can you get entity by its index?

#

from entity manager

#

or by its name

#

some fast way?

#

i know i can iterate by each entity in monobehaviour => get some component => gread value

#

but its probably slow

#

by the way i am trying to do this so i can get entity in some optimized manner from mb instead of looping through thousands of entities and checking if name matches

#

Lol

mint iron Apr 24, 2021, 12:11 PM

#

Could you search for it by the presence of a component, ForEach ? entity index is not going to be reliable.

gusty comet Apr 24, 2021, 12:12 PM

#

what if you stored entities in list List<entity> at start of the game?

#

will that list be reliable

#

eg will it not be corrupted later

#

if entities move to diff chunks or whatever

deft stump Apr 24, 2021, 12:12 PM

#

yes that list will still be reliable

#

since their ID's won't change

gusty comet Apr 24, 2021, 12:13 PM

#

mint iron Could you search for it by the presence of a component, ForEach ? entity index i...

i was trying to do in in MonoB

gusty comet Apr 24, 2021, 12:13 PM

#

deft stump since their ID's won't change

didnt xzjv just say id is not reliable

north bay Apr 24, 2021, 12:15 PM

#

What do you mean with reliable? As long as the entity exists the Entity struct will point to the same instance

gusty comet Apr 24, 2021, 12:16 PM

#

i dont know what he particularly means

mint iron Apr 24, 2021, 12:26 PM

#

i just mean that its a runtime variable, its going to change when working with SubScenes/Conversions, it could be deleted elsewhere, moved around as you build things out. Its fine for super temporary lists that you're needing to cache to pass into subsequent steps but id limit it to that. The entire thing is built around querying by component existence (and optimized for it), if whatever entity you need has a specific component then you don't have to care if the entity exists.

pliant pike Apr 24, 2021, 1:18 PM

#

I don't suppose anyone knows the best way to check whether a singleton entity exists in a monobehaviour?

karmic basin Apr 24, 2021, 1:27 PM

#

Build an EntityQuery in your MB then .CalculateCount() or smthg like that ?

pliant pike Apr 24, 2021, 1:50 PM

#

yeah exactly what I'm doing, just wasn't sure if there was another better way, thanks

gusty comet Apr 24, 2021, 1:54 PM

#

I used to think that rendermesh changes chunk only if you change mesh, cause its SharedMeshComponent, but now i noticed theres other values too in that component

        public Mesh mesh;
        public Material material;
        public int subMesh;
        [LayerField]
        public int layer;
        public ShadowCastingMode castShadows;
        public bool receiveShadows;
        public bool needMotionVectorPass;

        public bool Equals(RenderMesh other);
        public override int GetHashCode();

is the chunk changing mechanism triggered by change of any of the above? or is it just about mesh

#

thats quite limiting haha

#

i thought ill use same meshes with different materials but guess not

bright sentinel Apr 24, 2021, 2:16 PM

#

@gusty comet Pretty sure, but the thinking is that the RenderMesh changes rarely, so it's not really an issue

#

You could create some batching system if it's becoming too big of an issue

gusty comet Apr 24, 2021, 2:17 PM

#

yeah but the more meshes/materials the more chunks

karmic basin Apr 24, 2021, 2:43 PM

#

sadly yeah. 2 alternatives that should be more performant atm (leveragaing the GPU) would be Graphics API .DrawInstancedMesh or smthg like that or compute buffers

frosty siren Apr 24, 2021, 2:51 PM

#

Guys, Entities 0.17 changelog no more fixed in forum title. Can it be preparation for updates? 👀

gusty comet Apr 24, 2021, 2:55 PM

#

drawinstancedmesh are painful to setup and my meshes will be moving anyway

#

so i made them dots/ecs instead of Mono xD

gusty comet Apr 24, 2021, 2:56 PM

#

frosty siren Guys, Entities 0.17 changelog no more fixed in forum title. Can it be preparatio...

there are no updates for next year, or at least not fully compatible ones

frosty siren Apr 24, 2021, 3:01 PM

#

As i can understand what is written by MartinGram, 0.17 version and next releases are compatible with only 2020 LTS. Why no updates for whole year?

gusty comet Apr 24, 2021, 3:03 PM

#

yeah thats what i mean

#

no updates if u use newer unity

#

its kinda funny, you have to choose between up to date unity and up to date dots 😛

frosty siren Apr 24, 2021, 3:05 PM

#

Today, the situation makes "Unity" name more ironic than ever

#

For now whole my project is written with Entitites and i can't be with modern cool guys on 2021, so i only can wait for shiny 0.18

gusty comet Apr 24, 2021, 3:17 PM

#

damn do you have any screens? of project

#

ive made only world as entities

#

rest is monobehaviour

frosty siren Apr 24, 2021, 3:18 PM

#

As console says by error message i can't use SetComponent<T>() and can't use writable ComponentDataFromEntity if there is the same type in ForEach lambda expression.
Is there a way to write to component in this situation?

gusty comet Apr 24, 2021, 3:18 PM

#

cant imagine converting everything to entities 😛

frosty siren Apr 24, 2021, 3:19 PM

#

gusty comet cant imagine converting everything to entities 😛

i'm not about Pure ECS 🙂 It is close to impossible for now. I use a lot of monos. SpriteRenderer is everywhere. But all is written with Entities syntax, using entities queries i mean

gusty comet Apr 24, 2021, 3:24 PM

#

oh ok im writing some mono-entity interaction framework right now, for the world. mainly stuff like discarding models if player is too far, or changing planet LoD. planet and models are entities, but player is mono

#

what is rendermesh.submesh int value for?

gusty comet Apr 24, 2021, 4:09 PM

#

does SetComponentData overwrite whole data with new default struct values? + the change you specified. or does it only add the change to already existing data

bright sentinel Apr 24, 2021, 4:28 PM

#

@gusty comet It overwrites it

#

But if you just get the component, change the value in the component you get, and then set it back it will be just that value

gusty comet Apr 24, 2021, 4:50 PM

#

oh ok thx

#

any elegant way to store children of entity? i use protected override void OnStartRunning()

#

but theyre not converted yet so acessing child buffer results null

undone delta Apr 24, 2021, 5:23 PM

#

Beginner at ECS here, im tryiung to setup cinemachine with ECS right now but its not working
im using the conversion workflow

#

player will be converted into an entity

#

i thought there would be some sort of bridge for senarios like this

robust scaffold Apr 24, 2021, 6:10 PM

#

undone delta Beginner at ECS here, im tryiung to setup cinemachine with ECS right now but its...

Cameras dont need to be converted to DOTS. In fact, I think its recommended not to. Do all your movement code in regular Mono. Saves a lot of headache.

undone delta Apr 24, 2021, 6:10 PM

#

i actually found a tutorial 😅

#

but im still gonna move the player via ECS systems

#

just the camera stuff in Mono

frosty siren Apr 24, 2021, 6:50 PM

#

Why NativeMultiHashMap has SetValue() and NativeHashMap don't 😩

solid rock Apr 24, 2021, 7:23 PM

#

frosty siren Why NativeMultiHashMap has SetValue() and NativeHashMap don't 😩

Because SetValue is only in the context of iterating over the elements of a specific key

#

It's for replacing the current value in the iteration

#

I guess you want a method to replace the current value?

frosty siren Apr 24, 2021, 7:26 PM

#

yes

solid rock Apr 24, 2021, 7:26 PM

#

You can

frosty siren Apr 24, 2021, 7:26 PM

#

I have ended up with Remove + Add

solid rock Apr 24, 2021, 7:26 PM

#

You just use the indexer

#

myNativeHashMap[key] = value;

frosty siren Apr 24, 2021, 7:28 PM

#

thank you. i didn't see indexer in haspmap

solid rock Apr 24, 2021, 7:28 PM

#

This mirrors the api of System.Collections.Dictionary

#

https://docs.unity3d.com/Packages/com.unity.collections@0.15/api/Unity.Collections.NativeHashMap-2.html#Unity_Collections_NativeHashMap_2_Item__0_

#

documentation is not the best - as it just says "retrieves a value by key" but you can see it has both get and set defined

robust scaffold Apr 24, 2021, 9:55 PM

#

solid rock documentation is not the best - as it just says "retrieves a value by key" but y...

documentation is not the best
DOTS in a nutshell

karmic basin Apr 24, 2021, 9:59 PM

#

It's still experimental so it's expected that documentation is not top-level

gusty comet Apr 25, 2021, 1:09 PM

#

am I getting

#

world or local value by reading translation.Value

amber flicker Apr 25, 2021, 1:17 PM

#

gusty comet am I getting

local

gusty comet Apr 25, 2021, 1:32 PM

#

should ECB only be used from within job or can be called from monobehaviour too

gusty comet Apr 25, 2021, 1:32 PM

#

amber flicker local

thanks

frosty siren Apr 25, 2021, 1:32 PM

#

When i want to use some struct defined in system inside scheduled lambda i need to cache it in OnUpdate like this

public class MySys : SystemBase
{
  private SomeStruct _someData;

  protected override void OnUpdate()
  {
    var someData = _someData;

    Entities
      .ForeEach((...) => 
      {
        ...
        if(someData.value ...)
          ...
        ...
      })
      .Schedule();
  }
}

Is there cleaner solution?

gusty comet Apr 25, 2021, 1:34 PM

#

yeah that looks pretty ugly

frosty siren Apr 25, 2021, 1:34 PM

#

even more when i have 3 archetypes, some ComonentTypes and other struct data

bright sentinel Apr 25, 2021, 2:22 PM

#

frosty siren When i want to use some struct defined in system inside scheduled lambda i need ...

Unfortunately you have to, but in the first place, storing data in the system it something you should try to avoid.

frosty siren Apr 25, 2021, 2:27 PM

#

bright sentinel Unfortunately you have to, but in the first place, storing data in the system it...

I think persistent data of what entities archetype system need to create is a data that can only be stored inside System, isn't it?

worldly pulsar Apr 25, 2021, 2:28 PM

#

What problem do you see with storing ComponentTypes/Archetypes etc inside systems?

frosty siren Apr 25, 2021, 2:29 PM

#

are you asking Bmandk?

worldly pulsar Apr 25, 2021, 2:29 PM

#

both of you tbh 🙂

#

same for "SomeStruct" if it's persistent data internal to the system

frosty siren Apr 25, 2021, 2:30 PM

#

I see no problem to store data in system if talking about concepts. But it leads to heavy boilerplate code

gusty comet Apr 25, 2021, 2:39 PM

#

ive discarded my well optimized monobehaviour based world system for the sake of dots, i wonder if it will result in better performance in the end

bright sentinel Apr 25, 2021, 2:43 PM

#

frosty siren I think persistent data of what entities archetype system need to create is a da...

Well, that sounds just like a prefab tbh

bright sentinel Apr 25, 2021, 2:43 PM

#

worldly pulsar What problem do you see with storing ComponentTypes/Archetypes etc inside system...

If you ever want to access that data somewhere else, it's going to be a lot easier to have it stored in an entity.

#

By also storing the data in the entity, you also fulfill the age-old saying of separating data and behaviour

#

Sure, you have to write one or two extra lines of code to retrieve the data in that isolated system, but if you ever want to access that data in the future, then you're already set to do it much easier

gusty comet Apr 25, 2021, 2:47 PM

#

then you get copy of that data in every entity though

#

that can be like 4000 copies

bright sentinel Apr 25, 2021, 2:47 PM

#

No you don 't

#

Why would you copy the data to other entities?

worldly pulsar Apr 25, 2021, 2:47 PM

#

if you want to do this you should have a singleton entity with that data as a component

bright sentinel Apr 25, 2021, 2:48 PM

#

Yep

gusty comet Apr 25, 2021, 2:48 PM

#

i dont see issue with

#

storing temporary local variable in OnUpdate

bright sentinel Apr 25, 2021, 2:48 PM

#

The Overwatch devs did exactly what I'm advocating for here
https://www.youtube.com/watch?v=W3aieHjyNvw

YouTube

GDC

Overwatch Gameplay Architecture and Netcode

In this 2017 GDC session, Blizzard's Timothy Ford explains how Overwatch uses the Entity Component System (ECS) architecture to create a rich variety of layered gameplay.

Register for GDC: https://ubm.io/2yWXW38

Join the GDC mailing list: http://www.gdconf.com/subscribe

Follow GDC on Twitter: https://twitter.com/Official_GDC

GDC talks cover...

▶ Play video

#

They used to store it in their systems

#

But for good reasons, they went to singletons

worldly pulsar Apr 25, 2021, 2:52 PM

#

I'd still argue for doing the simplest thing that works, and modify when needed (i.e. store your internal system config stuff in the system). Especially for things like caching queries/archetypes/componentTypes (if it was possible to store them in the ECS), because this is strictly an optimisation (you can just recreate the archetype every OnUpdate) and querying the entity system gives you nothing.

#

If you expect that piece of data to be needed in other systems, by all means store it in a singleton

#

but don't add complexity for the sake of dogmatic "don't store data in systems"

slim nebula Apr 25, 2021, 2:53 PM

#

i think this debate is taking longer than adding 20 singletons

#

XD

#

get yo snippets on

bright sentinel Apr 25, 2021, 2:56 PM

#

I mean, I can link tons of forums, blogs etc that advocate for separating data and logic. The only argument so far against it is because it's more convenient to write that code.

slim nebula Apr 25, 2021, 2:56 PM

#

there's definitely an argument for being agile. dont do things you dont need

#

but separating data and systems is so important

#

and it's super quick

gusty comet Apr 25, 2021, 2:57 PM

#

ive noticed something weird, my monobs were rendered with gpu

#

but entities with cpu

worldly pulsar Apr 25, 2021, 2:57 PM

#

One quick question: do you consider things like Queries/ComponentTypes/Archetypes to be data?

slim nebula Apr 25, 2021, 2:58 PM

#

no. that's logic to figure out what data to perform operations on

#

not unlike for (int i

#

yeah "i" is a variable but it's just like... not really data

bright sentinel Apr 25, 2021, 2:59 PM

#

worldly pulsar One quick question: do you consider things like Queries/ComponentTypes/Archetype...

Queries, probably not. Archetypes you have to specify a bit, because if you want to create an entity based on an archetype, you could do it just from a prefab.

slim nebula Apr 25, 2021, 2:59 PM

#

you may persist it as a variable, but that's not unlike a lambda

bright sentinel Apr 25, 2021, 3:00 PM

#

And even if you don't need any specific data other than the types, I think you could also store the ComponentTypes

slim nebula Apr 25, 2021, 3:00 PM

#

interesting

bright sentinel Apr 25, 2021, 3:01 PM

#

But I also think it's quite rare that you're creating an archetype without any data anyways

worldly pulsar Apr 25, 2021, 3:01 PM

#

Archetype is just an entity description

bright sentinel Apr 25, 2021, 3:02 PM

#

So is a prefab, just with data

slim nebula Apr 25, 2021, 3:02 PM

#

like even programatically generating an entity, you can still initialize it with a prefab then update it

#

you dont have to make it in code from scratch

gusty comet Apr 25, 2021, 3:08 PM

#

soo is it normal that entities are rendered

#

with cpu and not gpu

#

omg

#

anyone knows

worldly pulsar Apr 25, 2021, 3:09 PM

#

what do you mean as "rendered with cpu"

gusty comet Apr 25, 2021, 3:09 PM

#

cpu usage increases when you look at entities and gpu stays the same

worldly pulsar Apr 25, 2021, 3:10 PM

#

were your monobehaviours static vs entities dynamic? and what rendering system are you using?

bright sentinel Apr 25, 2021, 3:13 PM

#

SUN?

#

? 😂

amber flicker Apr 25, 2021, 3:16 PM

#

gusty comet cpu usage increases when you look at entities and gpu stays the same

Not sure what this means but if it helps as a reference point, rendering 100k cubes (cpu-wise) on 3900x with URP and a directional light: ~2ms for uploading data, ~2ms animating & ~2ms evaluating TRS & changing render bounds + ~3ms for camera render. (Rough numbers, in editor but with safeties off etc)

gusty comet Apr 25, 2021, 3:25 PM

#

https://i.imgur.com/xfZ1A4P.png

Imgur

#

thats with 100 entities

#

jumps to cpu 30ms+ and stays there sometimes

#

okay it was done by shadows

#

(decreasing the shadow distance from 30 meter to 10 meters solved the issue) but is that normal that shadows are calculated with cpu?

worldly pulsar Apr 25, 2021, 3:38 PM

#

They are not, there is no software renderer in Unity. Something is putting more cpu pressure for some reason (data upload or culling if I had to guess? but may be anything). Make sure you are on Hybrid v2 and paste your frame profile

gusty comet Apr 25, 2021, 3:57 PM

#

hybrid v2 not compatible with my shaders

worldly pulsar Apr 25, 2021, 4:00 PM

#

Wait so you are on Hybrid v1 + built-in render pipeline?

#

Because that option was never really supported afair

#

and just worked by accident

#

Either way, there is no DOTS rendering system that doesn't rely on the scriptable rendering pipelines for performance

gusty comet Apr 25, 2021, 4:11 PM

#

i planned to convert them somewhere along the way

#

but last time i attempted it wouldnt work

gusty comet Apr 25, 2021, 4:39 PM

#

Has anyone ever encountered
Burst error BC1028: Creating a managed array `byte[]` is not supported?

#

I am declaring a static readonly Guid inside a class that extends SystemBase, assigning it to a variable in OnUpdate, and then using that variable in a Job.WithCode. The declaration of the Guid shouldn't be bursted yet Unity is complaining about it

safe lintel Apr 25, 2021, 5:03 PM

#

change the array to a native array?

worldly pulsar Apr 25, 2021, 5:03 PM

#

I think System.Guid is implemented with a byte[] inside

#

so using it at all inside Burst may be impossible

#

see the sources for System.Guid in the Mono repository and check the DOTS compiler window to see if it doesn't try to put a new byte[] anywhere inside the bursted section

safe lintel Apr 25, 2021, 5:07 PM

#

entities has a Hash128 which I think should be burst friendly? may want to try that over guid

gusty comet Apr 25, 2021, 5:08 PM

#

Hash128 sounds good! Thanks guys

#

@worldly pulsar According to https://github.com/mono/mono/blob/main/mcs/class/corlib/System/Guid.cs the code for creating a new Guid is ```namespace System
{
partial struct Guid
{
// used in ModuleBuilder so mcs doesn't need to invoke
// CryptoConfig for simple assemblies.
internal static unsafe byte[] FastNewGuidArray ()
{
byte[] guid = new byte [16];
fixed (byte *ptr = guid) {
Interop.GetRandomBytes(ptr, 16);
}

        // Mask in Variant 1-0 in Bit[7..6]
        guid [8] = (byte) ((guid [8] & 0x3f) | 0x80);
        // Mask in Version 4 (random based Guid) in Bits[15..13]
        guid [7] = (byte) ((guid [7] & 0x0f) | 0x40);

        return guid;
    }
}

}```

GitHub

mono/mono

Mono open source ECMA CLI, C# and .NET implementation. - mono/mono

#

So you're right, Guid cannot be used anywhere in bursted code

light mason Apr 25, 2021, 5:27 PM

#

Anyone used DSPGraph?

#

Or know how to access spectrum data fast from a microphone?

gusty comet Apr 25, 2021, 5:30 PM

#

@safe lintel I made my own Guid struct and put a Hash128 inside, which basically replaced all instances of the old Guid class in my project. Thank you so much!

#

Sometimes after script compilation the following exception is thrown, which causes the scene to lose all references to scripts upon clicking Play.

📎 message.txt

#

Manually triggering a recompilation corrects the script references, though it's very annoying and time consuming

warm panther Apr 25, 2021, 5:41 PM

#

Is this the most effective way to remove a component from all entities that have it? (group is a EQ for just that component)

Does the EQ need ReadWrite componenttype or just ReadOnly or just a Desc with All = ... (what exactly?)?

_group = GetEntityQuery(                                 ComponentType.ReadWrite<TagBubblePhysicsRefresh>()
                                   );

worldly pulsar Apr 25, 2021, 5:42 PM

#

yes 2. doesn't matter afaik

warm panther Apr 25, 2021, 5:42 PM

#

Thank you, @worldly pulsar

frosty siren Apr 25, 2021, 6:05 PM

#

bright sentinel Well, that sounds just like a prefab tbh

I see couple of problems.

When i use EntityArchetype to create entities i do it when i need no data, i mean when i can and want initialize entity from scratch.
Yes, i can use prefabs, this will eliminate the need for the system to have such data as EntityArchetype. But using Prefabs leads to increasing Archetype count, because PrefabTag creates unique entity description. I don't really know how much Archetypes is good to have, this is the question for me. But if i don't need data, why not do it for myself?
I have read your reply below about storing ComponentType as data and then construct entity from it. But can you set ComponentType from inspector? I think inspector can't do this for you. So you will need a code somewhere to initialise some singleton entity with some ComponentType data.

worldly pulsar Apr 25, 2021, 6:11 PM

#

how much Archetypes is good to have
Last I checked having archetypes is essentially free (same for queries). Creating archetypes is somewhat costly (in the "don't do that every frame" sense) but other than that, having an additional archetype from a prefab is not something I'd worry about.

bright sentinel Apr 25, 2021, 6:12 PM

#

frosty siren I see couple of problems. When i use EntityArchetype to create entities i do it...

It's a good point about prefabs creating more chunks. As we discussed, you can use ComponentTypes, but you still need the data somewhere. If you really wanted to optimize that, you can store it in some blob asset, to make the entity count less. Your blob asset could also have the component types in there.

As for setting in inspector, I guess not by default. But it's not too hard to create an editor script that gathers all the component types you want through some reflection and creates an enum or something for it, and then displays those in your inspector.

bright sentinel Apr 25, 2021, 6:13 PM

#

worldly pulsar > how much Archetypes is good to have Last I checked _having_ archetypes is esse...

His point is that having a prefab is actually a new entity, with a prefab tag. That means just having the prefab creates a new chunk with just that entity.

frosty siren Apr 25, 2021, 6:13 PM

#

worldly pulsar > how much Archetypes is good to have Last I checked _having_ archetypes is esse...

One your prefab creates one Archetype and one entity which stored in one chunk which is 16kb. It is not something critical but still.

frosty siren Apr 25, 2021, 6:15 PM

#

bright sentinel It's a good point about prefabs creating more chunks. As we discussed, you can u...

I have such script, but i have wrote it a year ago and i was facing problems with AOT

worldly pulsar Apr 25, 2021, 6:15 PM

#

So if you have 100 of these they will take 1.5 MB. If they are actually useful to you (which I'd argue in this case they are not) it really isn't something you'll notice unless you are on a really old mobile

frosty siren Apr 25, 2021, 6:15 PM

#

But maybe with ComponentType it will work

bright sentinel Apr 25, 2021, 6:16 PM

#

frosty siren I have such script, but i have wrote it a year ago and i was facing problems wit...

If it's an editor script, then AOT won't matter. You should basically just wrap it in #if UNITY_EDITOR anyways

frosty siren Apr 25, 2021, 6:20 PM

#

Year ago i was trying to find solution to be able to have something like ComponentPreset which stores component with data, not just types. And using this you'll be able to add components to entity at runtime. I was need such solution to construct arbitrary entity at runtime. I ended up with codegen.
Also i think that i can trick with conversion workflow to inject components at runtime.

remote crater Apr 25, 2021, 6:21 PM

#

One step at a time. I'm trying to downgrade me 2021 to 2020 LTS: here is my error message on converting: https://crystalfighter.com/code/8.png

bright sentinel Apr 25, 2021, 6:22 PM

#

frosty siren Year ago i was trying to find solution to be able to have something like Compone...

Yeah, some codegen or conversion workflow wouldn't have much trouble with this kind of stuff

frosty siren Apr 25, 2021, 6:22 PM

#

remote crater One step at a time. I'm trying to downgrade me 2021 to 2020 LTS: here is my erro...

Can it be that those packages versions are incompatible with 2020?

bright sentinel Apr 25, 2021, 6:22 PM

#

remote crater One step at a time. I'm trying to downgrade me 2021 to 2020 LTS: here is my erro...

I think 10.xx is the latest supported version for 2020

#

If you continue and go into the packagemanager you might be able to downgrade directly

#

Otherwise you will have to find out which versions are compatible with 2020

#

Most of the info should be on the SRP or URP manual

frosty siren Apr 25, 2021, 6:24 PM

#

@remote crater you can create empty project on 2020 and see latest versions of your packages

bright sentinel Apr 25, 2021, 6:25 PM

#

10.4.0 is the latest compatible versions

#

I'd recommend just going to the manifest and changing it there

frosty siren Apr 25, 2021, 6:38 PM

#

If i use DynamicBuffer in lambda and use GetBuffer inside lambda with the same type console tells me that i can't use writable access to buffers with same type.

My case: I use IngredientElement : IBufferElementData to represent what ingredients player has at the moment, and also i use same IngredientElement to represent required ingredient for recipe.

Is there something like DisableNative...WhateverToBeHappy ? Or what do you do in such cases?

worldly pulsar Apr 25, 2021, 6:42 PM

#

What I'd do is use IngredientInInventory and IngredientRequired structs as buffer elements, but if you guarantee the buffer on player is never the same as the buffer on requirements then I think it's ~~[NativeDisableParallelForRestriction]~~ Entities.WithDisabledParallelForRestriction()

#

(I assume the IngredientElement has some kind of ingredient ID so duplicating these is not a problem)

bright sentinel Apr 25, 2021, 6:47 PM

#

frosty siren If i use DynamicBuffer in lambda and use GetBuffer inside lambda with the same t...

The lambda has some disable descriptors, I forgot which one is the correct one

#

But it might be ParallelFor as @worldly pulsar said

worldly pulsar Apr 25, 2021, 6:48 PM

#

uh, wait, the ForEach syntax has Entities.WithDisabled..., not an attribute

bright sentinel Apr 25, 2021, 6:49 PM

#

Yeah that's what I meant 😄

frosty siren Apr 25, 2021, 6:56 PM

#

Thanks for answers, will try 🙂

remote crater Apr 25, 2021, 7:03 PM

#

oh i had no clue what that meant. Thanks guys.

warm panther Apr 25, 2021, 7:22 PM

#

var patched_filter = collider.Value.Value.Filter;
patched_filter.GroupIndex = bubble.id;
var cv = collider.Value;
var cvv = cv.Value;
cvv.Filter = patched_filter;
                                                          Debug.Assert(collider.Value.Value.Filter.Equals(patched_filter), "This assertion fails. Why?");

I'm struggling with setting a collision filter on an existing collider. This used to work (possibly by coincidence through case 0), so now I added the assertion and it always trips.

worldly pulsar Apr 25, 2021, 7:25 PM

#

is any of cv or cvv a struct type?

#

because then you are overriding a copy

warm panther Apr 25, 2021, 7:26 PM

#

BlobAssetReferences are apparently structs.

#

But... its value is a ref.

#

And I am changing the object at that ref.

#

Man those chains of structs... and abstracting away everything behind a BARef is just so difficult to debug.

remote crater Apr 25, 2021, 7:31 PM

#

Already guys! New errors! This is good because our princess is in another castle of errors: https://crystalfighter.com/code/9.png

#

I actually feel confident I can finally make a standalone.

worldly pulsar Apr 25, 2021, 7:33 PM

#

patched_filter.GroupIndex = bubble.id;
var cv = collider.Value;
ref var cvv = ref cv.Value;
cvv.Filter = patched_filter;
                                                          Debug.Assert(collider.Value.Value.Filter.Equals(patched_filter), "This assertion fails. Why?");```
I think it should work this way, because `cvv` in your version is a copy and the `Filter` setter takes the `this*` and does magic with it... but the copied Collider has this* pointing at the stack

warm panther Apr 25, 2021, 7:35 PM

#

worldly pulsar ```var patched_filter = collider.Value.Value.Filter; patched_filter.GroupIndex =...

Well it makes the assertion not trip, so that's encouraging.

#

But the functionality behind it doesnt work, so there is still something off.

#

(i.e. the collisions aren't detected)

worldly pulsar Apr 25, 2021, 7:35 PM

#

I'm actually not sure var cvv = cv.Value is even valid, because they assume C++ style data layout, where there Collider is just a header and they expect there to be more data in memory after it

warm panther Apr 25, 2021, 7:36 PM

#

collider is a PhysicsCollider componentdata

#

Looking at some ways people on the forums use to set collision filters, this seems to be a surprisingly convoluted topic.

#

collider.Value.Value.Filter = patched_filter;My old code was this.

#

Ok that passes the assertion, too.

#

Weird.

#

Well, not weird.

worldly pulsar Apr 25, 2021, 7:41 PM

#

this should be equivalent to my version (with ref)

warm panther Apr 25, 2021, 7:42 PM

#

I think maybe BuildPhysicsWorld doesnt pick these up then. There IS a bug in Unity ECS that I found and that got confirmed, but my new code is much simpler so that shouldn't trigger.

#

But in IsCollisionEnabled in Unity.Physics, the collision filters aren't properly updated.

worldly pulsar Apr 25, 2021, 7:43 PM

#

Is updating those blob assets at runtime even supported? (I barely ever use Unity.Physics)

warm panther Apr 25, 2021, 7:44 PM

#

It is.

#

hoo

#

good question though as to what extent

gusty comet Apr 25, 2021, 7:51 PM

#

Hey, I'm having trouble using Unity.Mathematics.random. I'm initializing a global random to be used by static variables like this
public static readonly MyGuid = /* code that uses the global random */
It has to be Unity.Mathematics,random, otherwise it won't be burstable. However, I keep getting the same generated value in all the classes that call the code that uses the global random. Anyone knows how to make each call to nextInt alter the global random's state?

#

I seeded it with a constant integer of 1

#

The random generator code is ```public static class RandomGenerator
{
private static readonly uint SEED = 1;

public static Random GenerateThreadSafeRandom()
{
    return new Random(SEED);
}

public static Random GenerateMainThreadRandom()
{
    var ticks = (uint)System.DateTime.Now.Ticks;
    var nonZeroTicks = ticks == 0 ? 1 : ticks;
    return new Random(nonZeroTicks);
}

}

#

And the Guid code is ```
public struct Guid : IEquatable<Guid>
{
private Unity.Entities.Hash128 hash;

private static readonly Unity.Mathematics.Random RANDOM = RandomGenerator.GenerateThreadSafeRandom();

public bool Equals(Guid other)
{
    return hash.Equals(other.hash);
}

public override int GetHashCode()
{
    return hash.GetHashCode();
}

public static Guid NewGuid()
{
    return new Guid
    {
        hash = new Unity.Entities.Hash128(RANDOM.NextUInt4())
    };
}

}

#

An example call to NewGuid() would be

public class SomeSystem : SystemBase
{
     public static readonly Guid SOME_GUID = Guid.NewGuid();
}

worldly pulsar Apr 25, 2021, 7:56 PM

#

You don't have a global rng, you have a static method that returns a copy of the same rng each time it's called

#

i.e. every time you call GenerateThreadSafeRandom() the resulting rng will produce the same sequence of numbers

gusty comet Apr 25, 2021, 7:57 PM

#

That's weird because the Guid class stores a single result of GenerateThreadSafeRandom()

worldly pulsar Apr 25, 2021, 7:57 PM

#

and i think the RANDOM in your guid doesn't work because it's readonly

#

so the compiler generates a copy before calling methods on it

gusty comet Apr 25, 2021, 7:58 PM

#

interesting, thanks for the info, I'll test things out

#

shucks, removing the readonly causes burst compiler to complain

#

This all stems from my trying to use SOME_GUID in jobs

#

Sorry that my use case is so convoluted 😅

remote crater Apr 25, 2021, 8:00 PM

#

Last errors to resolve maybe. How do I resolve these? I want my MMO to go live: https://www.crystalfighter.com/code/10.png

gusty comet Apr 25, 2021, 8:07 PM

#

I tried caching the private static readonly Guid in a local variable in OnUpdate outside of the ForEach, then using the local variable inside of the ForEach. Burst still thinks that I'm trying to directly load from a non-readonly static field

remote crater Apr 25, 2021, 8:11 PM

#

UnityEditor.Experimental.SceneManagement

#

Instead of the old SCenemanagement

warm panther Apr 25, 2021, 9:04 PM

#

@worldly pulsar The code did work, the problem was the following:

I had custom code depending on this, a change to DOTS Physics that interprets the GroupIndex field differently (like a layer)
the way Physics determines compound collider collisions is by checking the union of the colliders first; that caused the value to be written to 0 (which is the most inclusive GroupIndex in the default behaviour) again and then further checks just not done.
I do not know why a simple capsule is a compound collider but ok 🙂

Learned something here...

#

Solution was to set GroupIndex of compound colliders to -1 (or any other value that can't occur naturally), and then for that case to check if the Belongsto/collideswith bits overlap, and return true if so.

remote crater Apr 25, 2021, 10:12 PM

#

So I was able to port my DOTS/ECS project down to 2020, yet still on standalone, it has different execution behavior than in UNITY Editor as seen here: https://youtu.be/ChOdL0pOCWc Any idea why?

YouTube

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crude sierra Apr 25, 2021, 10:30 PM

#

Hey guys, when using entities, the only way to detect collision is with physics bodies? or is it still possible to use collider components?

flat agate Apr 25, 2021, 10:58 PM

#

Hey guys, is it possible to have a native array with a array inside? im trying to create parallel jobs and i wanted each job to give me a float array

solid rock Apr 25, 2021, 10:58 PM

#

Do you know how big the result array will be for each job?

#

or it's dynamic?

#

If it's dynamic - you could try using NativeMultiHashMap so each job can write into its own key.

#

If you know ahead of time how many results each will give, just use a NativeArray and have each job write into a segment of the array

flat agate Apr 25, 2021, 11:03 PM

#

thanks again for the help, i know ahead of time how many results each job will give, the thing is and correct me if im wrong but when using parallel jobs i need to use NativeArray to store each result of each thread

#

so like 3 threads working at the same time so the native array would have a size of 3

#

but im still super new to jobs so this might be wrong

solid rock Apr 25, 2021, 11:04 PM

#

You can use a single NativeArray of resultCount * number of iterations

#

your job doesn't need to correspond to the number of threads

flat agate Apr 25, 2021, 11:04 PM

#

Yeah that might work

solid rock Apr 25, 2021, 11:05 PM

#

If you use IJobParallelFor you get an execution index

#

so let's say you need to do a job on 20 elements

#

and each job has 5 floats as a result

flat agate Apr 25, 2021, 11:05 PM

#

so index * array size

solid rock Apr 25, 2021, 11:05 PM

#

then you make a NativeArray of 100

#

yeah

flat agate Apr 25, 2021, 11:05 PM

#

Thanks i wouldn´t get there myself

solid rock Apr 25, 2021, 11:06 PM

#

and then for each job you write results to to executionIndex * resultSize, so index * 5 through index * 5 + 4

#

so the first job would write to 0-4, the second to 5-9 and so on

bright sentinel Apr 25, 2021, 11:06 PM

#

remote crater So I was able to port my DOTS/ECS project down to 2020, yet still on standalone,...

How are you building?
Have you checked the logs for the build?

flat agate Apr 25, 2021, 11:07 PM

#

solid rock and then for each job you write results to to executionIndex * resultSize, so in...

Yeah im gonna give it a try thanks.

solid rock Apr 25, 2021, 11:09 PM

#

flat agate Yeah im gonna give it a try thanks.

You'll need to use [NativeDisableParallelForRestriction] in your jobs or the safety system will be upset with you writing to indexes that are not the same as the execution index, assuming you're using IJobParallelFor

#

Just a heads up

remote crater Apr 25, 2021, 11:21 PM

#

Ported to 2020 LTS still won't make ECS/DOTS standalone, just crashes when running it, any help? https://studio.youtube.com/video/PP1jRQLgruc/edit

YouTube

Share your videos with friends, family, and the world.

flat agate Apr 25, 2021, 11:22 PM

#

solid rock You'll need to use `[NativeDisableParallelForRestriction]` in your jobs or the s...

sorry to ask but where exactly do i place this? I tried above the struct but it didn´t work

#

aside from that i think everything will workout ok

bright sentinel Apr 25, 2021, 11:31 PM

#

remote crater Ported to 2020 LTS still won't make ECS/DOTS standalone, just crashes when runni...

Your scenelist in the build config is empty. Make sure that all your scenes AND subscenes are there, and in the normal build settings. They must also be there for some reason.

solid rock Apr 25, 2021, 11:31 PM

#

flat agate sorry to ask but where exactly do i place this? I tried above the struct but it ...

On the NativeArray field in your Job struct

#

For example here's one of mine

Screen_Shot_2021-04-25_at_7.32.13_PM.png

flat agate Apr 25, 2021, 11:37 PM

#

Thanks again

remote crater Apr 26, 2021, 12:04 AM

#

Bmandk, so wait, "use open scenes" doesn't actually register em for dots, but works for MONO?

remote crater Apr 26, 2021, 12:32 AM

#

Bmandk, I don't think that is the case. My scene loaded and played fine.

#

Its just when I enter DOTS/ECS mode, it crashes.

#

So I tried your mode and manually added a scene.

#

Still same behavior, crashes on DOTS/ECS play mode.

#

Is DOTS/ECS not supported in 2020LTS either?

slim nebula Apr 26, 2021, 12:48 AM

#

I know "use open scenes" does not do nested subscenes. not sure if there are other issues. I had to all all my scenes and subscenes for it to work. not sure what the deal is exactly

#

2020LTS is the main version that dots is supported in

#

@remote crater

remote crater Apr 26, 2021, 12:57 AM

#

I have no subscenes

#

I just have a scene

slim nebula Apr 26, 2021, 12:57 AM

#

o

remote crater Apr 26, 2021, 12:57 AM

#

I can screen shot my build options

#

Maybe I'm missing a build flag?

slim nebula Apr 26, 2021, 12:58 AM

#

what does the log say? what's causing the crash?

remote crater Apr 26, 2021, 12:59 AM

#

https://crystalfighter.com/code/13.png

#

Let me see, I never looked at a log file before.

#

Where is the log located. Seems like there is none.

slim nebula Apr 26, 2021, 1:00 AM

#

it should be in appdata. i forget if it's local or roaming, but then it'll be your company name or game title in there or something

remote crater Apr 26, 2021, 1:00 AM

#

kkk

slim nebula Apr 26, 2021, 1:01 AM

#

I... can't find mine... I dunno rofl

#

it's somewhere!

#

haha

#

google should be able to help

remote crater Apr 26, 2021, 1:03 AM

#

https://www.crystalfighter.com/code/Player.log

#

I found it, but can't understand it

#

Apparently it is saying certain things are null which aren't in the actual editor version.

#

Is it possible order of operations gets changed?

#

Cuz I convert to entity to a singleton for reference using hybrid mono/dots which people say you should do.

slim nebula Apr 26, 2021, 1:04 AM

#

NullReferenceException: Object reference not set to an instance of an object
  at Unity.Collections.LowLevel.Unsafe.UnsafeUtility.InternalCopyStructureToPtr[T] (T& input, System.Void* ptr) [0x00001] in C:\buildslave\unity\build\Runtime\Export\Unsafe\UnsafeUtilityPatched.cs:42 
  at Unity.Collections.LowLevel.Unsafe.UnsafeUtility.CopyStructureToPtr[T] (T& input, System.Void* ptr) [0x00001] in C:\buildslave\unity\build\Runtime\Export\Unsafe\UnsafeUtilityPatched.cs:36 
  at Unity.Entities.EntityDataAccess.SetComponentData[T] (Unity.Entities.Entity entity, T componentData) [0x0003a] in D:\unity\unity projects\starfighterclient - Copy (2) - Copy\Library\PackageCache\com.unity.entities@0.17.0-preview.41\Unity.Entities\EntityDataAccess.cs:1017 
  at Unity.Entities.EntityManager.SetComponentData[T] (Unity.Entities.Entity entity, T componentData) [0x00008] in D:\unity\unity projects\starfighterclient - Copy (2) - Copy\Library\PackageCache\com.unity.entities@0.17.0-preview.41\Unity.Entities\EntityManagerAccessComponentData.cs:50 
  at Controls.FixedUpdate () [0x0028a] in D:\unity\unity projects\starfighterclient - Copy (2) - Copy\Assets\Scripts\Player Scripts\Controls.cs:1600 ```

remote crater Apr 26, 2021, 1:04 AM

#

Nulls everywhere man

slim nebula Apr 26, 2021, 1:04 AM

#

D:\unity\unity projects\starfighterclient - Copy (2) - Copy\Library\PackageCache\com.unity.entities@0.17.0-preview.41\Unity.Entities\EntityDataAccess.cs:1017

remote crater Apr 26, 2021, 1:05 AM

#

But it isn't the case in editor version.

#

Thats a core package.

slim nebula Apr 26, 2021, 1:05 AM

#

oh sorry whoops read it wrong

#

D:\unity\unity projects\starfighterclient - Copy (2) - Copy\Assets\Scripts\Player Scripts\Controls.cs:1600

remote crater Apr 26, 2021, 1:05 AM

#

oooh!

#

That helps!

slim nebula Apr 26, 2021, 1:06 AM

#

I find that because the release build runs faster the initial order of system is sometimes different in a build than in unity

remote crater Apr 26, 2021, 1:06 AM

#

That line is: https://hatebin.com/jpwbupmwvy

slim nebula Apr 26, 2021, 1:06 AM

#

might need to add some before and after attributes

remote crater Apr 26, 2021, 1:06 AM

#

OOOOH so that IS THE PROBLEM! AS I expected, Unity has no set order of operations

#

That's terrible design, but I can hack it to make it work maybe

#

That's really good stuff to know bro.

#

DOTS/ECS is awesome otherwise, their stock is gonna rocket when this is done.

#

So that log file, is there a way for my debug.log statements to show up in them. This could help me find the order of operations in my editor vs standalone.

slim nebula Apr 26, 2021, 1:10 AM

#

they do

#

they're there

remote crater Apr 26, 2021, 1:10 AM

#

oh yeah I see em now

#

I thought I had more

#

TY. Ok, gonna get dinner, and theorize how to do this.

#

Should be as easy as just putting Debug.Log before every entity call

#

which I only have about 20

#

Thanks coder bro.

#

Remember if I make it big, ask me for a Manilla Enevelope 🙂

slim nebula Apr 26, 2021, 1:11 AM

#

assuming that doesn't make a system take so long that the order changes again after you remove the debug statement XD

#

but good luck

remote crater Apr 26, 2021, 1:11 AM

#

Well in order to avoid race conditions, I could have a pacer variable

#

Don't run this unless > x

slim nebula Apr 26, 2021, 1:12 AM

#

you can just use UpdateBefore and UpdateAfter attributes on the systems to enforce order

remote crater Apr 26, 2021, 1:12 AM

#

I've dealt with should be racer condition hell with that decades ago.

#

TY, I book marked that.

normal scarab Apr 26, 2021, 3:36 AM

#

Hey guys is minmax ai a common use case for dots?

#

Or any kind of state space search

#

It's a bottleneck for my game and I'm wondering if I should invest in writing a dots solution/find one online

robust scaffold Apr 26, 2021, 3:41 AM

#

normal scarab Hey guys is minmax ai a common use case for dots?

General consensus on the DOTS forums is that the only AI DOTS supports is a form of Utility AI. No clue how min-max AI relates to it though.

robust scaffold Apr 26, 2021, 3:44 AM

#

normal scarab Hey guys is minmax ai a common use case for dots?

https://forum.unity.com/threads/suggestions-for-maintainable-ai-logic.1096807/

Unity Forum

Suggestions for maintainable AI logic?

I'm diving into AI, and I am running into trouble splitting different behaviors into different systems. I cannot use tagging; I've tried but I have too...

normal scarab Apr 26, 2021, 4:05 AM

#

Hmm yeah this kind of high level decision making was the only result I could find too

#

I've only scratched the surface of dots so I'm probably not gonna try it if there are no examples of it being done but lemme know if anyone has any ideas

light mason Apr 26, 2021, 6:06 AM

#

Anyone use DSPGraph

frosty siren Apr 26, 2021, 11:45 AM

#

bright sentinel The lambda has some disable descriptors, I forgot which one is the correct one

@bright sentinel , @worldly pulsar it seems like those descriptors are only for captured native containers

bright sentinel Apr 26, 2021, 12:43 PM

#

frosty siren <@!107870625674055680> , <@!183893160236154880> it seems like those descriptors ...

Hmm, maybe you can then use BufferFromEntity<T> then, and then disable the restrictions on that?

frosty siren Apr 26, 2021, 12:45 PM

#

i'm not quite understand how

bright sentinel Apr 26, 2021, 12:55 PM

#

frosty siren i'm not quite understand how

Something like

OnUpdate()
{
  SomeBuffer yourBuffers = GetBufferFromEntity<SomeBuffer>(Allocator.TempJob);
  Entities.WithNativeDisableParallelFor(yourBuffers).ForEach((Entity entity, SomeData someData) => {
    var buffer1 = yourBuffers[entity];
    var buffer2 = yourBuffers[someData.someEntityReference];
  }).Schedule();
}

#

Does that make sense?

frosty siren Apr 26, 2021, 12:58 PM

#

oh, ok, i've got it

bright sentinel Apr 26, 2021, 12:59 PM

#

@frosty siren You might also be able to use the "new" syntax, with GetBuffer to replace most of it.

#

OnUpdate()
{
  Entities.ForEach((Entity entity, SomeData someData) => {
    var buffer1 = GetBuffer<SomeBuffer>(entity);
    var buffer2 = GetBuffer<SomeBuffer>(someData.someEntityReference);
  }).Schedule();
}

Although I'm unsure if the disable thing gets added automatically with that or not

frosty siren Apr 26, 2021, 1:03 PM

#

I already use new syntax everywhere, but it leads to this problem

frosty siren Apr 26, 2021, 1:46 PM

#

bright sentinel Hmm, maybe you can then use BufferFromEntity<T> then, and then disable the restr...

no its not working

frosty siren Apr 26, 2021, 1:48 PM

#

bright sentinel Something like ``` OnUpdate() { SomeBuffer yourBuffers = GetBufferFromEntity<...

there is no problem in your example code, because error only happens when you have DynamicBuffer in foreach query like

OnUpdate()
{
  SomeBuffer yourBuffers = GetBufferFromEntity<SomeBuffer>(Allocator.TempJob);
  Entities.ForEach((Entity entity, DynamicBuffer<SomeBuffer> someBuffer) => {
    var buffer1 = yourBuffers[entity];
    var buffer2 = yourBuffers[someData.someEntityReference];
  }).Schedule();
}

bright sentinel Apr 26, 2021, 1:52 PM

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@frosty siren Yeah, but that's why you don't have the dynamicbuffer as part of the ForEach, but use the BufferFromEntity type instead

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Oh, I also mistyped I guess.

frosty siren Apr 26, 2021, 1:53 PM

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WithNativeDisableContainerSafetyRestriction works

bright sentinel Apr 26, 2021, 1:53 PM

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SomeBuffer yourBuffers = GetBufferFromEntity<SomeBuffer>(Allocator.TempJob); should be BufferFromEntity<SomeBuffer> yourBuffers = GetBufferFromEntity<SomeBuffer>(Allocator.TempJob);

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But good that it works 😄

frosty siren Apr 26, 2021, 1:55 PM

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LOL. I could use BFE for entity in ForEach instead of pass DynamicBuffer to query. Little overhead and so less problems

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Simple things sometimes pass my head

crude sierra Apr 26, 2021, 3:15 PM

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hey guys, let's say some of my project is classic unity and I want to only implement ECS in one system. however, that system is linked to the other systems in the game. How do I do the conversion without worrying too much of it breaking other things? I'm currently trying the Convert And Inject Game Object on my entity, but changes to the entity don't reflect back on the gameobject (such as destroying the entity, does not destroy the related game object)
where can I read of the best way to do this, or do I need to convert the entire game to ECS for this?

frosty siren Apr 26, 2021, 3:38 PM

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crude sierra hey guys, let's say some of my project is classic unity and I want to only imple...

No, you can ship your game to dots partially. Convert And Inject Game Object will just add all components from gameobject to entity as ComponentObject, and you will be able to access GO's components from ECS systems. But by default this kind of conversion do no sync for gameobject<->entity. If you want to sync positions, you can use CopyTransformToGameObject/CopyTransformFromGameobject/etc. But there is no built in way to sync destroying for injected gameobject, you must create something by yourself.
Convert and Destroy will just destroy gameobject after conversion, but all GO's components that used in GameObjectConversionSystem.AddHybridComponent(Component) will appear on new gameobject which will be completely linked to entity (means sync position, destroying, creating). For example by default, if you use HybridRenderer, SpriteRenderer component will be added as Hybrid in case of use Convert and Destroy. AFAIK it called Companion, when gameobject recreated and linked to entity during conversion. Using companions very simple, but it has downsides.

crude sierra Apr 26, 2021, 3:41 PM

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frosty siren No, you can ship your game to dots partially. `Convert And Inject Game Object` w...

thanks for the answer tony, so basically if I want to sync the destruction of entities towards their GO, I need to create my own conversion system as described here?
https://docs.unity3d.com/Packages/com.unity.entities@0.16/manual/conversion.html

frosty siren Apr 26, 2021, 3:44 PM

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can you please refer to section you're talking about?

crude sierra Apr 26, 2021, 3:45 PM

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frosty siren can you please refer to section you're talking about?

I was thinking to make something like

class SyncDestruction : GameObjectConversionSystem
...
OnUpdate()
{
  // do something here
}

frosty siren Apr 26, 2021, 3:47 PM

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To sync destroying?

crude sierra Apr 26, 2021, 3:49 PM

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frosty siren To sync destroying?

I wouldn't know if it will work, these things seem too abstract for me

frosty siren Apr 26, 2021, 3:50 PM

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Conversion systems only works when conversion happens. If your game perfectly uses dots, then conversion wont be needed at runtime. So to destroy gameobject, you have to

Cache entity destroy event (maybe SystemStateComponent can help)
Access to related gameobject
Destroy gameobject manually (or reuse it 🙂 )

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crude sierra Apr 26, 2021, 3:52 PM

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frosty siren Conversion systems only works when conversion happens. If your game perfectly us...

I will look into those, thanks a bunch!

zenith wyvern Apr 26, 2021, 3:53 PM

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crude sierra thanks for the answer tony, so basically if I want to sync the destruction of en...

You might be looking for hybrid components https://docs.unity3d.com/Packages/com.unity.entities@0.17/manual/hybrid_component.html

crude sierra Apr 26, 2021, 3:53 PM

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zenith wyvern You might be looking for hybrid components https://docs.unity3d.com/Packages/com...

I will look into that as well, thank you 🙂

gusty comet Apr 26, 2021, 4:41 PM

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is it possible to update variable of SystemBase ?

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from MB

karmic basin Apr 26, 2021, 4:42 PM

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yes

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from entitymanger you have a system getter

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wrong, my bad. You access systems from World, not EM

gusty comet Apr 26, 2021, 4:48 PM

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World.DefaultGameObjectInjectionWorld.GetExistingSystem<GalaxySystem>().set

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whats next though

karmic basin Apr 26, 2021, 4:49 PM

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World.DefaultGameObjectInjectionWorld.GetExistingSystem<GalaxySystem>().myPublicVariableInSystemScope ?

gusty comet Apr 26, 2021, 4:49 PM

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oh it was private thats why

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thank you!

karmic basin Apr 26, 2021, 4:50 PM

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you're welcome, and another thing, check if it exists, just in case your MB Update() runs before your system

gusty comet Apr 26, 2021, 4:51 PM

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thats not needed for this particular case

karmic basin Apr 26, 2021, 4:51 PM

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should probably check if system was returned

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oh ok 😛

gusty comet Apr 26, 2021, 4:52 PM

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i am submitting player transform to system, on player login

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so the system can calculate distance from planets to player

karmic basin Apr 26, 2021, 4:55 PM

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Isn't it enough to have a system that queries player + its position components, and just instantiate the player prefab on login, and let the query in the system pick up the player position. Without having to set anything ?

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that is to say, without setting position explicitely

gusty comet Apr 26, 2021, 4:57 PM

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do you know about this?

UnloadTime: 2.157500 ms
NullReferenceException: Object reference not set to an instance of an object
at Unity.Scenes.ResourceCatalogData.GetGUIDFromPath (System.String path) [0x00096] in <6d6849833010407eaf68aacfba8931a1>:0
at Unity.Scenes.SceneSystem.GetSceneGUID (System.String scenePath) [0x0000b] in <6d6849833010407eaf68aacfba8931a1>:0
at Unity.Scenes.GameObjectSceneUtility.AddGameObjectSceneReferences () [0x00034] in <6d6849833010407eaf68aacfba8931a1>:0
at Unity.Entities.AutomaticWorldBootstrap.Initialize () [0x0000c] in <666db234fd54498496918391b0314900>:0

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in build only

karmic basin Apr 26, 2021, 4:58 PM

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yeah, check if system getter returned something before trying to set one of it's var ?

gusty comet Apr 26, 2021, 4:58 PM

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wait, this is something related to scenes

karmic basin Apr 26, 2021, 4:59 PM

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double check you included all scenes in build ?

gusty comet Apr 26, 2021, 4:59 PM

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do you compile differently for dots?

karmic basin Apr 26, 2021, 4:59 PM

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yup, from the build asset, not the classic build menu

gusty comet Apr 26, 2021, 4:59 PM

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i have all scenes

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what is build asset? i dont have it faik

karmic basin Apr 26, 2021, 5:00 PM

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https://docs.unity3d.com/Packages/com.unity.entities@0.17/manual/install_setup.html#standalone-builds

karmic basin Apr 26, 2021, 5:00 PM

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gusty comet what is build asset? i dont have it faik

it's in com.unity.platforms package

gusty comet Apr 26, 2021, 5:00 PM

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ohh

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i get it now

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i was reading this actually rn

karmic basin Apr 26, 2021, 5:01 PM

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🙂

gusty comet Apr 26, 2021, 5:01 PM

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you know i dont use subscenes

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uwu

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wondering if it will bite me back

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but in my game its important that you see things happening 1000 meters away

karmic basin Apr 26, 2021, 5:04 PM

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1km is okay you wont have floating point origin problems

gusty comet Apr 26, 2021, 5:05 PM

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these kind of problems start to appear after 5k-10k-40k

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depending what kind of code you use

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egg AddForce based gravity worked poorly even at 5k

karmic basin Apr 26, 2021, 5:05 PM

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yup

gusty comet Apr 26, 2021, 5:05 PM

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but i replced it with

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raycast

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and it worked fine until 40k

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if i remember correctly

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by raycast i mean snapping the player to planet to raycast.point instead of pushing him via addforce

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would love to have super big world though, i did hear dots will be able to help with floating point precision

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but they probably dont care about this atm

karmic basin Apr 26, 2021, 5:09 PM

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even with dots i would still have Position components with doubles instead of UNity transform with floats, and have some 3d grid for spatial partitionning and shift everything in view above a threshold. But I still need to test if that messes up physics or not one day

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have some kind of Interest management for additional far/big objects to render in the client view

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Erf, the list of things to prototype is infinite 😭

gusty comet Apr 26, 2021, 5:13 PM

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are they doubles?

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the position components

karmic basin Apr 26, 2021, 5:13 PM

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I mean make your own

gusty comet Apr 26, 2021, 5:13 PM

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ah

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well except my player is monobehaviioour XDD

karmic basin Apr 26, 2021, 5:13 PM

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and you use that for simulation computations

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then convert/approximate to MB's transform.position