#archived-dots | Official Unity Discord | Page 75

low tangle May 14, 2019, 8:14 AM

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I handle the handshake with the old transform systems

golden heron May 14, 2019, 8:14 AM

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I thought entitys didnt have normal transforms?

low tangle May 14, 2019, 8:16 AM

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they dont

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I have a hybrid setup that spawns normal gameobjects, those need to get updated from the ecs systems

golden heron May 14, 2019, 8:17 AM

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ah i see

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I imagine taking a snapshot of the entire system's data is not likely to be very quick, but i guess i should be able to take a snapshot of data from a small group of entities? I was mostly thinking towards the future when i network it

low tangle May 14, 2019, 8:18 AM

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its actually pretty quick

golden heron May 14, 2019, 8:19 AM

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altho, the ecs system is intended to be the server backend, it wont be transmitting much data of that available

low tangle May 14, 2019, 8:19 AM

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all of it is linear memory

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you could even write the whole world to disk in no time at all

golden heron May 14, 2019, 8:19 AM

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nice

low tangle May 14, 2019, 8:19 AM

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chunks are 16kb by default

golden heron May 14, 2019, 8:19 AM

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oh, its basically preserialised, most of ecs?

low tangle May 14, 2019, 8:19 AM

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so you might only have a few hundred chunks at a time

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yep

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they have utilitys for it as well

golden heron May 14, 2019, 8:20 AM

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nice

low tangle May 14, 2019, 8:20 AM

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its how the streaming system was built

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megacity

golden heron May 14, 2019, 8:20 AM

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My arrangement is never gonna need the entire system to send data tho... Just small parts of it.

low tangle May 14, 2019, 8:20 AM

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thats just binary blobs of entitys loaded by jobs into another world

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yeah its better to focus on what data streams you needed

golden heron May 14, 2019, 8:20 AM

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Have you seen a game called master of orion?

low tangle May 14, 2019, 8:21 AM

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yep great game

golden heron May 14, 2019, 8:21 AM

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the original dos versions?

low tangle May 14, 2019, 8:21 AM

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yep played em

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still do

golden heron May 14, 2019, 8:21 AM

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:)

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Basically, my game is intended to be what it would be like to pilot one of those ships in a moo galaxy.

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from the perspective of a pilot, not a god persona.

low tangle May 14, 2019, 8:23 AM

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sweet

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good setting

golden heron May 14, 2019, 8:23 AM

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But, imagine moo brought to life with a background universe and economy. Like a complex rts game in slow mo running the universe, whilst players affect the balance of resources via combat or plain old mining, or trade.

low tangle May 14, 2019, 8:23 AM

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sounds like eve

golden heron May 14, 2019, 8:23 AM

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But the players main aim will be building ships.

low tangle May 14, 2019, 8:24 AM

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well looks like my build wont upload to steam because il2cpp keeps crashing which is great at 1am. well I'm gonna head to sleep now, I'll check in tomorrow and see if anyone needs help

golden heron May 14, 2019, 8:24 AM

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Well... It will be entirely pilot driven, i intend to add some cool autopilot ideas, but, when a player is playing properly, theyll be actually flying, and really aiming weapons... none of that pretend stuff hehe

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Ok, sleep well! and thanks for the info :)

low tangle May 14, 2019, 8:25 AM

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thanks, no problem 😁

crystal zephyr May 14, 2019, 10:28 AM

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Does anybody knows how blobAssets are working? Can I use that to give a componentData a scriptable object or so?

amber flicker May 14, 2019, 12:55 PM

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Using the following code in a monobehaviour: chunks[i].GetComponentObjects(targetType, entityManager) I'm getting the following error: ```NullReferenceException: Object reference not set to an instance of an object
Unity.Entities.ArchetypeManager.GetManagedObjectRange (Unity.Entities.Chunk* chunk, System.Int32 type, System.Int32& rangeStart, System.Int32& rangeLength) (at Library/PackageCache/com.unity.entities@0.0.12-preview.31/Unity.Entities/ArchetypeManager.cs:1393)
Unity.Entities.ArchetypeChunk.GetComponentObjects[T] (Unity.Entities.ArchetypeChunkComponentType`1[T] componentType, Unity.Entities.EntityManager manager) (at Library/PackageCache/com.unity.entities@0.0.12-preview.31/Unity.Entities/Iterators/ArchetypeChunkArray.cs:255)

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I'm trying to iterate all entities and find any that previously had a matching component (in this case Transform) added to them via entityManager.AddComponentObject(entity, component);

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I can avoid the error by doing equivalent of if( chunks[i].Archetype.GetComponentTypes(Allocator.Temp).Contains(ComponentType.ReadOnly<Transform>())).. 😒

eternal dune May 14, 2019, 1:14 PM

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Hi, just wondering whether there is any recent example or code snippet on how to use Barriers to add/remove components/entities from a job. Seems like the only examples I can find still use the old [Inject] syntax.

potent cape May 14, 2019, 1:44 PM

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@eternal dune shouldnt PostUpdateCommands.AddComponent etc solve your problem? But remember using PostUpdateComamnds.Playback() at the end

eternal dune May 14, 2019, 1:49 PM

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This does work for a normal ComponentSystem, but not for a JobComponentSystem.

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Actually ComponentSystem does not even exist in a JobComponent system

potent cape May 14, 2019, 1:51 PM

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ahhh ok... wait a sec i need to look into my project because i know i did this somewhere xD

eternal dune May 14, 2019, 1:51 PM

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Oh, that would be great!

potent cape May 14, 2019, 1:53 PM

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@eternal dune DMed

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But i also have another ecs/dots question: I would love to have a health bar on top of my entities. How to work with ui and ecs?

dull copper May 14, 2019, 1:59 PM

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you can either use hybrid to drive existing Unity UI or just do pure ECS where you control the health bar by material properties or mesh magic

potent cape May 14, 2019, 2:00 PM

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since my entities are already on pure ecs i guess i should go the material way...

safe gate May 14, 2019, 4:38 PM

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How do I make a system that receives two types of entities?

potent cape May 14, 2019, 4:39 PM

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just give them the same component?

safe gate May 14, 2019, 4:39 PM

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I want to make an enemy follow a player, so I need to know the player translate to change the enemy direction

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So I need to query for entities that have EnemyTag and Direction, and entities that have PlayerTag and Translation

potent cape May 14, 2019, 4:48 PM

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ummm why don't you do it as in the new ecs example?

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https://github.com/UnityTechnologies/AngryBots_ECS

GitHub

UnityTechnologies/AngryBots_ECS

The DOTS project used for the presentation Converting Your Game to DOTS - UnityTechnologies/AngryBots_ECS

safe gate May 14, 2019, 4:51 PM

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Have a singleton that holds the information? I guess it works, but there is no ECS way of doing this?

potent cape May 14, 2019, 4:52 PM

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there are ecs singletons i haven't worked with yet

safe lintel May 14, 2019, 4:58 PM

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plug a ToComponentDataArray or use ComponentDataFromEntity and a singleton for the playertag if its just one player

safe gate May 14, 2019, 5:16 PM

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How do I convert the player to a singleton?

safe lintel May 14, 2019, 5:18 PM

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PlayerInput = GetSingleton<PlayerInput>()

eternal dune May 14, 2019, 5:28 PM

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    {
        var entity = em.CreateEntity(typeof(T));
        em.SetName(entity, typeof(T).Name);
        var group = em.CreateEntityQuery(typeof(T));
        group.SetSingleton(value);
    }```

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This is what I use for singletons

gusty comet May 14, 2019, 6:35 PM

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Any tips on splitting a struct with 2 native lists inside into blittable parts that can be put into a native queue? I'm essentially doing a random walker with breadth search to generate a random path on a limited grid.

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I need a native array of visited vertices and a native array of previous vertices in current path per generation snapshot.

wise drift May 14, 2019, 7:25 PM

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Im currently building a Collision Detection system and im checking for collisions inside of an IJobParallelFor. The detection seems to work but i need a solution to get components from the entity. I can add components via the EntityCommandbuffer but have no way of checking if a component exists. Is there a way to do this?

regal pond May 14, 2019, 7:33 PM

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You can access the component on an Entity via the EntityManager. You cannot access the EM from a job, however, so you'll have to get the Component before scheduling the job and pass it in as a field to it.

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You can capture the EM in the OnCreate method via World.EntityManager, and then before scheduling your job you can grab the ComponentData, given that you have given it the correct Entity. var componentData = _entityManager.GetComponentData<T>(myEntity); (where T is the ComponentData you're looking for)

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@wise drift

wise drift May 14, 2019, 7:37 PM

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Ah cool thanks, yeah sadly i cant do it like this in my case, but i think i found a diffferent solution via the IjobForEachWithEntity so i can only calculate collisions between the correct entities. Thanks for the help though.

safe lintel May 14, 2019, 7:46 PM

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you can use GetComponentDataFromEntity so like TranslationData = GetComponentDataFromEntity<Translation>(); to pass into your job and then check via if(TranslationData.Exists(myEntity))

loud hawk May 14, 2019, 7:52 PM

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Is it possible to do custom sort on a ParticleSystem using a job? The Unity distance sort is not sufficient for mesh based particles, as you move through the particles or rotate the camera particles pop in and out in front of each other. The sort needs to be on closest box or sphere surface instead of center, I am writing this but finding it slow to sort because I am using get/set particle calls. I see job samples but they only involve getting or setting some of the particle attributes, not re-arranging them.

regal pond May 14, 2019, 7:58 PM

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@loud hawk I've not tried it before, but there is a thread with an example using jobs to process the particles. https://forum.unity.com/threads/particle-system-c-job-system-support.529284/ (theres a feedback thread at the bottom of the post that leads to a more in-depth discussion about it)

Unity Forum

Unity - Particle System C# Job System support

We have begun investigating how the C# Job System might interact with the Particle System.

The idea is to allow particles to be manipulated in jobs,...

loud hawk May 14, 2019, 8:03 PM

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@regal pond thanks for the link, I just came from there before posting hehehe but I did post on that link at the bottom

regal pond May 14, 2019, 8:04 PM

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Ah yes. I see that now, hah. My bad. I hope you find a solution

loud hawk May 14, 2019, 8:25 PM

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Thanks. It would be ideal to sort pointers, I am happy to do unsafe code, but my guess is Unity does not want to expose the internals. I'm guessing I will end up writing a custom particle system not using shuriken.

untold night May 14, 2019, 8:57 PM

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@loud hawk - there may be folks in the #✨┃vfx-and-particles channel that can point you to a solution, especially considering how new a lot of these jobified APIs are

loud hawk May 14, 2019, 8:57 PM

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@untold night thanks, posted there, fingers crossed

low tangle May 14, 2019, 9:24 PM

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@eternal dune did you get the info you needed on barriers?

safe lintel May 14, 2019, 10:09 PM

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hypothetically speaking, would an ecs particle system be as efficient as the existing (not vfx)particle system?

analog tangle May 14, 2019, 10:42 PM

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I'm guessing yes, although the real benefit would probably be making (or licensing) a better-fitting particle system for your game. Ex: If you need the size of the particle or something.

frosty siren May 15, 2019, 12:15 AM

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I need your advice, guys.
I need to sort some entities that represents some objects in the game depending on some FLOAT return of some method that can be expansive.
Methods includes different sets of arguments those requires different sets of IComponentData or another data.
I want to write just one sort method for any cases.
So what the best way to do it u think?

safe gate May 15, 2019, 12:28 AM

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I just discovered that LocalToWorld is deprecated. What should I use?

frosty siren May 15, 2019, 12:31 AM

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@safe gate where?

safe gate May 15, 2019, 12:31 AM

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📎 unknown.png

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Ooooh

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I see what is happening

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The proxy is the only one obsolete

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Because now it is automatically added

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I tried adding it manually

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And when the gameobject was converted, it gave me an error because the component was duplicated

low tangle May 15, 2019, 2:23 AM

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yeah proxys are deprecated

crystal zephyr May 15, 2019, 7:02 AM

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It is deprecated because of the new conversion system with convert to entity. Unity has the convert method for the transform component in place which will create all necessary data components for you.

amber flicker May 15, 2019, 8:18 AM

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@loud hawk I faced a similar issue before and opted for a geometry shader - just in case it helps: https://www.youtube.com/watch?v=1hbcWhifuxE

YouTube

Vec3

Unity Corner - Fixing particle alignment for multiple camera/cubem...

First video in hopefully part of a series with Pete & Tim where we cover some of the more obscure problems we encounter. It's all with the aim of sharing kno...

▶ Play video

eternal dune May 15, 2019, 8:38 AM

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@low tangle I did, thanks for checking!

low tangle May 15, 2019, 8:58 AM

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np

junior fjord May 15, 2019, 11:46 AM

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how do I change the nth element of a dynamic buffer? [] has not setter

eternal dune May 15, 2019, 11:52 AM

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I guess it does? public T this[int index] { get; set; }

dry nymph May 15, 2019, 12:58 PM

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var myBufferAsArray = myBuffer.AsNativeArray(); // this is not allocating, just reinterpreting the dynamic buffer as a native array

eternal dune May 15, 2019, 1:01 PM

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I think that's by design Return a native array that aliases the buffer contents. The array is only legal to access as long as the buffer is not reallocated.

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You can use ToNativeArray(Allocator) instead

dry nymph May 15, 2019, 1:04 PM

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Correct that's the difference between AsNativeArray and ToNativeArray. But if you want to change the buffer's content at a specific position, AsNativeArray sounds like what you want

loud hawk May 15, 2019, 1:05 PM

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@amber flicker Thanks for sharing. Is it possible to sort using geometry shader?

eternal dune May 15, 2019, 1:07 PM

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oh yes, but you should also be able to just do na[index]=4; if na is DynamicBuffer<int>?

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@loud hawk I guess you'd need a Compute Shader, see e.g. https://developer.nvidia.com/gpugems/GPUGems2/gpugems2_chapter46.html

NVIDIA Developer

GPU Gems

junior fjord May 15, 2019, 1:13 PM

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@eternal dune no that isn't possible since [] has no setter

eternal dune May 15, 2019, 1:53 PM

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It does, according to https://docs.unity3d.com/Packages/com.unity.entities@0.0/api/Unity.Entities.DynamicBuffer-1.html ?

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public T this[int index] { get; set; }

junior fjord May 15, 2019, 2:19 PM

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hmm dunno why I thought differently earlier, I'll check again

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thank you @eternal dune

eternal dune May 15, 2019, 3:56 PM

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maybe you tried something like na[i].x = 4;? That's not going to work, and I personally consistently forget about that 😃

safe gate May 15, 2019, 11:21 PM

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How do I make an monobehaviour scripts know about an entity?

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Like, I want the camera to follow the player. The camera is OOP and the player DOTS, how do I gap the bridge?

safe lintel May 15, 2019, 11:53 PM

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you will probably need to add either a CopyTransformFromGameObject or CopyTransformToGameObject component to it and then something else like make a CameraFollow component and process it in its own system

safe gate May 16, 2019, 12:41 AM

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I cant figure out how both of these components work

safe lintel May 16, 2019, 12:55 AM

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basically both of the components work to either copy the old unity Transform to the ecs Transform(Translation, Rotation, LocalToWorld) or do the reverse

safe gate May 16, 2019, 1:14 AM

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I'm sorry but I'm struggling with that. And what if I try another approach. Can the camera monobehaviour have access to read the player entity position?

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It is a singleton btw

safe lintel May 16, 2019, 1:47 AM

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ah yeah woke up from a nap when i typed the earlier stuff, you could easily use a hybrid ComponentSystem and just access a camera's monobehaviour from there, and then get a query for the player entity

safe lintel May 16, 2019, 2:05 AM

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you could do something like

    public class CameraSystem : ComponentSystem
    {
        protected EntityQuery CameraQuery;
        protected Entity      Player;
        private ComponentDataFromEntity<Translation> TranslationData;
        private ComponentDataFromEntity<Rotation> RotationData;

        protected override void OnCreateManager()
        {
            EntityQueryDesc query = new EntityQueryDesc
            {
                All = new ComponentType[]{ typeof(PlayerCameraTag), typeof(Transform), typeof(Camera) }
            };
        
            CameraQuery = GetEntityQuery(query);         
        }
    
        protected override void OnUpdate()
        {
            if (HasSingleton<PlayerTag>())
                Player = GetSingletonEntity<PlayerTag>();
            else 
                return;
        
            Entities.With(CameraQuery).ForEach((Entity entity, Transform camTransform, Camera camera) =>
            {
                camera.transform.position = TranslationData[Player].Value;
                camera.transform.rotation = RotationData[Player].Value;
            });
        }
    }

dull copper May 16, 2019, 10:22 AM

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https://bintray.com/unity/unity-staging/com.unity.entities/0.0.12-preview.32
https://bintray.com/unity/unity-staging/com.unity.rendering.hybrid/0.0.1-preview.12

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no new physics package on staging yet

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## [0.0.12-preview.32] - 2019-05-16

### New Features

* Added BlobBuilder which is a new API to build Blob Assets that does not require preallocating one contiguous block of memory. The BlobAllocator is now marked obsolete.
* Added versions of `IJobForEach` that support `DynamicBuffer`s
  * Due to C# language contraints, these overloads needed different names. The format for these overloads follows the following structure:
    * All job names begin with either `IJobForEach` or `IJobForEachEntity`
    * All jobs names are then followed by an underscore `_` and a combination of letter corresponding to the parameter types of the job
      * `B` - `IBufferElementData`
      * `C` - `IComponentData`
      * `E` - `Entity` (`IJobForEachWithEntity` only)
    * All suffixes for `WithEntity` jobs begin with `E`
    * All data types in a suffix are in alphabetical order
  * Here is the complete list of overloads:
    * `IJobForEach_C`, `IJobForEach_CC`, `IJobForEach_CCC`, `IJobForEach_CCCC`, `IJobForEach_CCCCC`, `IJobForEach_CCCCCC`
    * `IJobForEach_B`, `IJobForEach_BB`, `IJobForEach_BBB`, `IJobForEach_BBBB`, `IJobForEach_BBBBB`, `IJobForEach_BBBBBB`
    * `IJobForEach_BC`, `IJobForEach_BCC`, `IJobForEach_BCCC`, `IJobForEach_BCCCC`, `IJobForEach_BCCCCC`, `IJobForEach_BBC`, `IJobForEach_BBCC`, `IJobForEach_BBCCC`, `IJobForEach_BBCCCC`, `IJobForEach_BBBC`, `IJobForEach_BBBCC`, `IJobForEach_BBBCCC`, `IJobForEach_BBBCCC`, `IJobForEach_BBBBC`, `IJobForEach_BBBBCC`, `IJobForEach_BBBBBC`
    * `IJobForEachWithEntity_EB`, `IJobForEachWithEntity_EBB`, `IJobForEachWithEntity_EBBB`, `IJobForEachWithEntity_EBBBB`, `IJobForEachWithEntity_EBBBBB`, `IJobForEachWithEntity_EBBBBBB`
    * `IJobForEachWithEntity_EC`, `IJobForEachWithEntity_ECC`, `IJobForEachWithEntity_ECCC`, `IJobForEachWithEntity_ECCCC`, `IJobForEachWithEntity_ECCCCC`, `IJobForEachWithEntity_ECCCCCC`

#

    * `IJobForEachWithEntity_BC`, `IJobForEachWithEntity_BCC`, `IJobForEachWithEntity_BCCC`, `IJobForEachWithEntity_BCCCC`, `IJobForEachWithEntity_BCCCCC`, `IJobForEachWithEntity_BBC`, `IJobForEachWithEntity_BBCC`, `IJobForEachWithEntity_BBCCC`, `IJobForEachWithEntity_BBCCCC`, `IJobForEachWithEntity_BBBC`, `IJobForEachWithEntity_BBBCC`, `IJobForEachWithEntity_BBBCCC`, `IJobForEachWithEntity_BBBCCC`, `IJobForEachWithEntity_BBBBC`, `IJobForEachWithEntity_BBBBCC`, `IJobForEachWithEntity_BBBBBC`
    * Note that you can still use `IJobForEach` and `IJobForEachWithEntity` as before if you're using only `IComponentData`.
* EntityManager.SetEnabled API automatically enables & disables an entity or set of entities. If LinkedEntityGroup is present the whole group is enabled / disabled. Inactive game objects automatically get a LinkedEntityGroup added so that EntityManager.SetEnabled works as expected out of the box.
* Add `WithAnyReadOnly` and `WithAllReadyOnly` methods to EntityQueryBuilder to specify queries that filter on components with access type ReadOnly.
* No longer throw when the same type is in a WithAll and ForEach delegate param for ForEach queries.
* `DynamicBuffer` CopyFrom method now supports another DynamicBuffer as a parameter.
* Fixed cases that would not be handled correctly by the api updater.```

#

### Upgrade guide

* Usages of BlobAllocator will need to be changed to use BlobBuilder instead. The API is similar but Allocate now returns the data that can be populated:

  ref var root = ref builder.ConstructRoot<MyData>();
  var floatArray = builder.Allocate(3, ref root.floatArray);
  floatArray[0] = 0; // root.floatArray[0] can not be used and will throw on access

* ISharedComponentData with managed fields must implement IEquatable and GetHashCode
* IComponentData and ISharedComponentData implementing IEquatable must also override GetHashCode

### Fixes

* Comparisons of managed objects (e.g. in shared components) now work as expected
* Prefabs referencing other prefabs are now supported in game object entity conversion process
* Fixed a regression where ComponentDataProxy was not working correctly on Prefabs due to a ordering issue.
* Exposed GameObjectConversionDeclarePrefabsGroup for declaring prefab references. (Must happen before any conversion systems run)
* Inactive game objects are automatically converted to be Disabled entities
* Disabled components are ignored during conversion process. Behaviour.Enabled has no direct mapping in ECS. It is recommended to Disable whole entities instead
* Warnings are now issues when asking for a GetPrimaryEntity that is not a game object that is part of the converted group. HasPrimaryEntity can be used to check if the game object is part of the converted group in case that is necessary.
* Fixed a race condition in `EntityCommandBuffer.AddBuffer()` and `EntityCommandBuffer.SetBuffer()`

#

that was for the new Entities obviously, Hybrid package only got this: ```md

[0.0.1-preview.12] - 2019-05-16

Fixes

Adding/fixing Equals and GetHashCode for proxy components. ```

amber flicker May 16, 2019, 10:34 AM

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thanks @dull copper

solar spire May 16, 2019, 10:36 AM

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christ

dull copper May 16, 2019, 10:36 AM

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I'm still looking at that and am just wtf

solar spire May 16, 2019, 10:36 AM

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whelp, I continue to not want to use this 🙃

dull copper May 16, 2019, 10:37 AM

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someone missed the memo about easier usability

solar spire May 16, 2019, 10:38 AM

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what_BBCCC do_BBBBC you_CCCC mean_BBCCCC?

dull copper May 16, 2019, 10:38 AM

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what could go wrong

safe gate May 16, 2019, 10:38 AM

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I'm reading all this and I can barely understand a word

solar spire May 16, 2019, 10:38 AM

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does this make it a real pain in the ass to autocomplete too?

low tangle May 16, 2019, 10:39 AM

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those overrides are for foreach and they are generated internally

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people were asking for more as well

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you actually dont even look at those, just have to know the ordering you want

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it always matches your querys

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your edits are messing with me lol

dull copper May 16, 2019, 10:41 AM

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sorry, just changed the list like on the actual change log doc 😄

low tangle May 16, 2019, 10:41 AM

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no worries

dull copper May 16, 2019, 10:41 AM

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discord message limits 😦

low tangle May 16, 2019, 10:41 AM

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I'm just up at 4am trying to read and they jump a line every time you did a edit

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you said thats on staging

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not release?

dull copper May 16, 2019, 10:41 AM

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yeah

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they sometimes skip a release

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but it's never happened because bad API afaik

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just some breaking issue

low tangle May 16, 2019, 10:42 AM

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kinda want to play with that new blob api

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been avoiding them till they got offically released

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is there a long gap between staging and actual release?

dull copper May 16, 2019, 10:43 AM

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sometimes they get out same day, sometimes there's day or two delay

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and if there's some issue, they just make new release on staging and same process goes again

low tangle May 16, 2019, 10:44 AM

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alright, thats some cool heads up

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always excited for more goodies

stuck saffron May 16, 2019, 1:26 PM

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I havent look into it but what is a blob?

safe lintel May 16, 2019, 1:47 PM

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my vague understanding is its non blittable data that gets converted into a more easily read format for ecs, like an animated mesh. i think colliders are blobs as well

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@dull copper i have been able to compile ecs with uwp and the most recent physics without error, regarding your forum post

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oh wait just il2cpp not necessarily uwp maybe this is nnot the same thing

dull copper May 16, 2019, 2:37 PM

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uwp is il2cpp only platform tho

safe lintel May 16, 2019, 3:08 PM

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yeah, was drinking my coffee when i typed that

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anyway i did just try a build(with unity physics) of il2cpp non uwp and it also completed without error

wooden pivot May 16, 2019, 3:18 PM

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@dull copper not in 2018.2

dull copper May 16, 2019, 3:25 PM

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how do you guys test it?

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I have it throwing errors on 2 different projects on 2019.3 but also on 2019.1 with dots repos physics samples raycast vehicle scene

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I haven't tried empty scene

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I haven't tried on 2019.2

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(for a while at least)

safe lintel May 16, 2019, 3:27 PM

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my project uses unity physics for player movement, collision and raycasting for bullets and sight, its 2019.1

dull copper May 16, 2019, 3:28 PM

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the error I got on 2019.3 was only on one place, and if I removed the offending range limiting tag, it built but crashed elsewhere when I ran it

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on 2019.1 I got some some file inclusion issue

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but it's possible the 2019.1 error isn't even related to same thing

safe lintel May 16, 2019, 3:29 PM

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ill be honest, i was tearing out my hair trying to get il2cpp to compile for a long time, i went and installed almost every visual studio optional package

dull copper May 16, 2019, 3:30 PM

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anyways, will try to get new 2019.1 project and see what happens if I don't put anything to it, but the package

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IL2CPP has worked just fine on this computer till now

safe lintel May 16, 2019, 3:33 PM

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my memory is a little hazy but I think 2018.3 il2cpp worked fine but I had tons of issues with 2019.1

#

i think it was The UWP build will always compile all four targets (X86, X64, ARMv7 and ARMv8). so i was missing a bunch of requirements

#

outside of uwp I dont know why there would be inclusion issues, but maybe the link.xml file?

#

ah preview.32 is on regular package registry now

#

along with collections, jobs and the hybrid renderer

dull copper May 16, 2019, 3:38 PM

#

that probably means new update on dots repo soon

#

btw, does the hybrid renderer not work with built-in renderer?

safe lintel May 16, 2019, 3:54 PM

#

hmm 'GetPrimaryEntity(GameObject go) is a game object that was not included in the conversion. It will be ignored.' convert and inject not working in a hierarchy now?

#

it works together

dull copper May 16, 2019, 3:55 PM

#

oh, I forgot to add the hybrid package to this test project

#

I guess that explains why everything just vanish

#

dots repo updated: https://github.com/Unity-Technologies/EntityComponentSystemSamples

#

## Changes

* Rearranged all HelloECS samples into new HelloCube folder structure. Also renamed most types to make it clear in the Unity UI exactly what types are being used (namespaces are not typically visible in Unity).
* Moved the `Hybrid_01_FixedTimestep` to `Advanced/FixedTimestepWorkaround`.

#

they messed up the release notes a bit

#

they put this on previous release:


* Added versions of `IJobForEach` that support `DynamicBuffer`s
  * Due to C# language contraints, these overloads needed different names. For example:
  * `IJobForEach_BCC` is a job which takes 1 `IBufferElementData` and 2 `IComponentData`
  * `IJobForEach_BBC` is a job which takes 2 `IBufferElementData` and 1 `IComponentData`
  * ...etc

#

as for the IL2CPP issue: ```Unhandled Exception: Unity.IL2CPP.Building.BuilderFailedException: Lump_libil2cpp_icalls.cpp

C:\Unity\Unity Projects\EntityComponentSystemSamples\UnityPhysicsExamples\Temp\StagingArea\Data\il2cppOutput\lumpedcpp\Lump_libil2cpp_icalls.cpp(2): fatal error C1083: Cannot open include file: '................\2019.1.2f1\Editor\Data\il2cpp\libil2cpp\icalls\System.Configuration\System.Configuration\InternalConfigurationHost.cpp': No such file or directory```

#

I do have that file tho

#

that's not the physics package specific tho but is what I get on 2019.1.2 now 😄

safe lintel May 16, 2019, 4:14 PM

#

maybe the path is too long?

dull copper May 16, 2019, 4:15 PM

#

I dunno, most people have way longer paths

#

for example if you got unity and hub in program files

#

it's pretty long project path tho

#

145 chars

#

so it's not near windows max yet

wise drift May 16, 2019, 4:27 PM

#

I'm currently trying to build a entity despawn system, i want it to run as the last system in each iteration so that after all calculations are done the entities can be cleaned up if they are no longer needed. Also it is necessary so that the other systems don't try to access already destroyed entities. I've already tried to mark my systems with the tag : [UpdateBefore (typeof (DespawnSystem))] . Am i missing something here or maybe is the approach wrong altogether?

amber flicker May 16, 2019, 4:29 PM

#

Guaranteeing the order doesn't guarantee the previous job will be finished (assuming you're using jobs) - likely you need to call .Complete() on any outstanding jobs

wise drift May 16, 2019, 4:32 PM

#

yeah mostly using jobs. How can i check that they are completed from my despawn system? Im doing var Job = new ExampleJob{}.Schedule (this, inputDeps); Job.Complete (); inside of the OnUpdate function of the other systems.
Could it be an issue that i have some systems that are JobComponentSystems and others that are ComponentSystems?

amber flicker May 16, 2019, 4:36 PM

#

mixing types of systems shouldn't be an issue... if you're calling complete on all your jobs it should work so it may be that the orders aren't quite right... I would create a ComponentSystemGroup (I think that's what it's called) and then use [UpdateInGroup(mainJobGroup)] then for the despawn system run it in [UpdateInGroup(despawnGroup)] and when you define those groups, do e.g. cs mainJobGroup : ComponentSystemGroup; [UpdateAfter(mainJobGroup)] despawnGroup : ComponentSystemGroup - very psuedocode

#

if you want to access your other systems jobs you can use system1 = entityManager.GetExistingSystem<MyFirstSystem>() then system.currentJob and inside MyFirstSystem when you do new ExampleJob, you'd say 'currentJob = new ExampleJob..' and make currentJob a public member of the system

#

sorry, I'm sure I could have written all of that better

regal pond May 16, 2019, 4:47 PM

#

@wise drift Instead of trying to manage the complexity of manually finishing jobs, have you tried simply attaching a Tag Component to mark entities you want to despawn? For example:

public struct MarkForDeletion : IComponentData {}
public struct EntityLifetime : IComponentData {
   public float timeToLive; 
}

// ... in different system ...

lifeTimeComponent.timeToLive += deltaTime;

if (lifeTimeComponent.timeToLive <= 0f) {
   commandBuffer.AddComponent(entity, new MarkForDeletion());
   commandBuffer.RemoveComponent(entity, typeof(EntityLifetime));
}

#

instead of relying on the order or state of a system, you could rely on the components to dictate in which order the systems should run

wise drift May 16, 2019, 4:52 PM

#

Yeah that's basically what i am doing right now if i understand you correctly. The problem just seems to be that the other systems try to update again while the entities are still being destroyed and as some Jobs are IJobForEachWithEntity they presumably try to access entities that are already being deleted. Now if i could somehow exclude the ones with the Despawn Tag from the IJobForeach then i think it would work too, but i haven't found a way to do that either.

regal pond May 16, 2019, 4:54 PM

#

have you tried [ExcludeComponent(typeof(MarkForDeletion))] as an attribute to the Job?

wise drift May 16, 2019, 4:54 PM

#

But yeah ive just tried the group approch and the behaviour still seems to be the same. It does work with low numbers of entities but as soon as i try to have more than 5 it seems to break

#

i have not tried that yet. let me see if that works

wise drift May 16, 2019, 5:19 PM

#

So ive tried the Tag and Exclude approach but the problem still persists. It seems to me that the next iteration gets started before the Despawn System is run completely. Is there a way to force this?

tawdry tree May 16, 2019, 5:24 PM

#

Preeeetty sure you should be able to make something a dependency on another thing, and the second thing can then .Complete() the dependency to make sure its done. Unfortunately I forgot the specifics, but I think it's system level.

regal pond May 16, 2019, 5:33 PM

#

@wise drift Have you tried removing the Component(s) in the system that relies on it? Like if the JobForEachWithEntity relies on FooComponent and you remove the FooComponent from that entity when it meets the conditions, does it prevent an additional iteration of that job from happening to that component?

wise drift May 16, 2019, 5:38 PM

#

I could but that would require a lot more jobs i think. Currently there is a System that tags the entites wich have <0 lifetime and one that tags the ones with <0 health. If i wanted to remove the specific components i would have to wirte jobs for each seperate entitie type.

#

but as it stands right now the job that accesses the entities wich then not get found will run before even all the entities are tagged.

dusk relic May 16, 2019, 5:48 PM

#

Is there any right way of letting a job complete when it's done, or do I have to loop through an array jobhandles to check if they are completed?

safe lintel May 16, 2019, 6:47 PM

#

does lightmapping not work with the hybridrenderer?

low tangle May 16, 2019, 8:38 PM

#

no it doesnt

#

theres a handful of features it supports

coarse turtle May 16, 2019, 8:39 PM

#

btw some interesting changes to the latest entities package:

ISharedComponentData with managed fields must implement IEquatable and GetHashCode
IComponentData and ISharedComponentData implementing IEquatable must also override GetHashCode

dull copper May 16, 2019, 8:39 PM

#

new terrain improvements will go to waste unless they get them on dots side as well

#

I got 2019.3 finally to build that physics test scene with IL2CPP

#

had to downgrade to older hybrid renderer and remove the unsupported range tag from the physics package :/

#

it's hardly a proper fix

#

I also removed some test packages and tests from the main project so could be a lot of things now

blazing mural May 16, 2019, 8:45 PM

#

Is it possible to use MaterialPropertyBlock or similar with ECS hybrid renderer or is that still coming later on?

dull copper May 16, 2019, 8:48 PM

#

now that I did get it running, I tried updating to newest hybrid renderer and entities but it still crashes the runtime

#

it builds it fine but can't run it, instant crash after resolution selection

#

now I wonder if crashing because physics still use the old bloballocators that have been deprecated

dull copper May 16, 2019, 9:37 PM

#

well, the crash on standalone is coming from burst when using newest packages

#

if I disable burst from standalone build, it doesn't crash but physics are still bit wonky on spawn

next kiln May 16, 2019, 10:47 PM

#

Is MeshInstanceRenderSystem still slower than MeshRenderer when not taking advantage of instanced meshes?

wispy patio May 16, 2019, 11:31 PM

#

Hi everybody! Is there a benefit to specifying that ComponentTypes are read-only when passing them to EntityManager.CreateArchetype()?

safe lintel May 17, 2019, 3:16 AM

#

i think its to help sort out job/system dependencies

candid willow May 17, 2019, 4:50 AM

#

My office has scheduled a work shop with Unity engineers next week. Any topics I should grill them on?

#

I'm mostly interested in ecs approaches to ai and ml

safe lintel May 17, 2019, 4:56 AM

#

id love an answer on when the animation package is coming 😃

candid willow May 17, 2019, 5:03 AM

#

Sure. There's a day planned for artists so I'm sure it'll come up.

#

We do consulting for automotive so companies will come in and throw all their new prototypes at us.

safe lintel May 17, 2019, 5:18 AM

#

nice

dull copper May 17, 2019, 8:03 AM

#

I get these with newest packages on the raycast vehicle scene now even in the editor:
IndexOutOfRangeException: Index 31 is out of range of '24' Length.
IndexOutOfRangeException: Index 255 is out of range of '23' Length.

#

I think it's the joint solver that freaks out

#

it could explain why burst goes bonkers too

#

I guess it's just better to wait for new unity physics package if one wants to use the newest entities package

minor sapphire May 17, 2019, 8:12 AM

#

I just got ConvertEntity failed because there was no Active World when hitting play hmm

#

wonder if I should revert 😐

dull copper May 17, 2019, 8:25 AM

#

ah, I got that too on my quick test project

#

and putting gameobjectentity there just made things a lot worse 😄

minor sapphire May 17, 2019, 8:26 AM

#

I'm upgrading to 2019.2.0b2 to see if that helps

dull copper May 17, 2019, 8:26 AM

#

I'm rolling back to preview.31

#

almost everything breaks for me on .32 and co

minor sapphire May 17, 2019, 8:27 AM

#

31 broke for me, I can only use 30 atm haha

dull copper May 17, 2019, 8:27 AM

#

there isn't even huge change in API so it's kinda weird

#

hmmm, I can use latest other things, like jobs, collections, hybrid renderer, burst 1.04 etc with entities p31

#

it's just when I bump the entities package up things go breaking in all directions

#

in my case, it could all boil down to Unity Physics package not being compatible with the newest entities tho

minor sapphire May 17, 2019, 9:19 AM

#

I'm using physics too

minor sapphire May 17, 2019, 9:54 AM

#

it's just script order causing this I think. They haven't set World.Active yet, but I don't see a way to include package scripts in project script execution order.

#

ah but it didn't work even if I start the gameobject as disabled then enable them

dull copper May 17, 2019, 9:57 AM

#

well, p31 isn't all working either on my main project :/

#

still crash on standalone 😄

#

this time it crashes on some transform function

#

it's not a big deal but it does slow down things

#

plus I always prefer having optimal builds available 😃

#

I would never want to find myself in position where I have to compromise if I find out last minute that the conf I've always worked towards wouldn't even run

#

current crash is coming from collections, but that's probably on me as I tried to get away with newest everything but entities

minor sapphire May 17, 2019, 10:06 AM

#

@dull copper I am getting away with newest everything but entities, including physics, on beta 2, with entities p30

#

Also, https://forum.unity.com/threads/entities-p32-world-active-is-null.680041/ maybe pitch in so unity take it seriously? lol

Unity Forum

Entities p32: World.Active is null

Is there something about p32 that requires us to manually set World.Active?
After upgrading, it looks like it's null causing an error.

ConvertToEntity...

dull copper May 17, 2019, 10:07 AM

#

yeah, so did I on the ecs physics samples, but on my main project I get crash on collections

minor sapphire May 17, 2019, 10:08 AM

#

I'm not using physics samples, and I have latest collections, must be a difference in how we are using collections

dull copper May 17, 2019, 10:08 AM

#

yeah, just saying one project is fine with the combo and other isn't 😄

minor sapphire May 17, 2019, 10:08 AM

#

unless you are on alpha 3 with packages not available in beta 2

dull copper May 17, 2019, 10:09 AM

#

ah, I'm actually on alpha for both projects so it's not a difference between the two

#

and my 2019.1.2 refuses to build anything IL2CPP atm

#

wonder if the hub screwed up the install

minor sapphire May 17, 2019, 10:10 AM

#

oh I had that too so I gave up lol

dull copper May 17, 2019, 10:10 AM

#

yeah, I don't really care about 2019.1 at this point

#

just wanted to verify if things break on latest official

spiral cairn May 17, 2019, 1:28 PM

#

Hi guys, I get the benefits and how to use DOTS with gameplay related features but I wondered if someone could redirect me to any resource that would explain to me how a pure DOTS game would be structured to manage, say for instance game states (menus, levels, etc...) thanks 😉

tawdry tree May 17, 2019, 1:41 PM

#

I unfortunately don't have a resource for that, but I believe the short answer is that you safe game state, as with all state, in components in entities. So you might have a tag, GameStateEntityTagComponent, and spawn an entity with that on it on game start.
Assuming a game like Super Mario (2D), you'd then put a GameStartedComponent with the time you started a map, a GameScoreComponent with the score, and a LevelsDoneComponent and so forth on it. As a bonus, the gamestate entity with all components might be all you need to (de-)serialize to save/load the entire game (if it's fairly simple).
Obviously stuff that is saved to disk would still be saved and loaded from disk, but while loaded, data should exist in components. That's the pure ECS way, as far as I understand it. The usual caveat applies: If it's better*, then it's a perfectly valid choice to break from the best practices and paradigms.
*Easier to develop and maintain, faster, better performant; whatever counts as value to your team.**
**In the long term, the best way to do things usually 'by the rules', but if you're prototyping, or know what you need, breaking a few rules can be incredibly useful. Beware technical debt, though; can you really guarantee that you won't (re-)use that code, or that the requirements will never change?

minor sapphire May 17, 2019, 1:57 PM

#

is it even worth doing things like a menu in ecs?

#

seems to me like doing it the old fashioned way is simpler?

dull copper May 17, 2019, 2:09 PM

#

these mainly make sense when Tiny mode gets fully ported to c# and we get DOTS player builds

#

as then you can't have monobehaviours there if you target that kind of thing

#

but for anything else, it seems super early to try to do everything on pure ECS

tawdry tree May 17, 2019, 2:26 PM

#

Well yeah, menus (just GUI in general) isn't quite ECS/dots ready. I guess you could put some of the logic there (updating health bars?) but it's hard to do reactive stuff (click button, stuff happens) for now. I guess I forgot to answer that part of the question.

spiral cairn May 17, 2019, 2:29 PM

#

thanks for these advices 😉

safe lintel May 17, 2019, 2:31 PM

#

does anyone know how to convert(and inject) a gameobject to an entity via script?

tawdry tree May 17, 2019, 2:31 PM

#

If you have any problems, this channel can usually answer quickfire questions, though for more complex stuff you might need to go to the forums. That specific question could be good on the forums if only to have centralized discussion on the topic.
Try to have concrete examples for any problems you face, though, since that makes it easier to give the right answer.

spiral cairn May 17, 2019, 2:32 PM

#

I will thankx @tawdry tree

tawdry tree May 17, 2019, 2:34 PM

#

@safe lintel There is a ConvertToEntity class. haven't used it in its current form, but I think there is some sample that does. AFAIK it runs and then destroys the original, but don't quote me on that.
https://docs.unity3d.com/Packages/com.unity.entities@0.0/api/Unity.Entities.ConvertToEntity.html

dull copper May 17, 2019, 2:35 PM

#

question is bit vague

#

you mean something like https://github.com/Unity-Technologies/EntityComponentSystemSamples/tree/master/Samples/Assets/HelloCube/5. SpawnFromMonoBehaviour ?

safe lintel May 17, 2019, 2:40 PM

#

basically looking to do what converttoentity with inject via script but not sure how to create the entity in the temporary world

dull copper May 17, 2019, 2:58 PM

#

well, this was day wasted trying to solve the IL2CPP build

#

turns out that IL2CPP crashes on this https://github.com/Unity-Technologies/EntityComponentSystemSamples/blob/master/UnityPhysicsExamples/Assets/Common/Scripts/EntityTracker.cs#L24

#

I'm guessing there's some null value for either entity manager or the entity first time it runs and IL2CPP can't handle that try-catch so it just crashes

#

for some reason same script does work on DOTS repos physics samples even when built with IL2CPP

#

tbh, I'm not super happy to see that try catch there in the first place 😃

safe lintel May 17, 2019, 3:17 PM

#

do the advanced physics samples(vehicle, charactercontroller) work in playmode? i wouldve expected them not to work given my own problems with ConvertToEntity in a hierarchy

dull copper May 17, 2019, 3:19 PM

#

with p31, yes

#

p32 breaks something with joints

#

at least on my end but it could be engine version too

safe lintel May 17, 2019, 3:22 PM

#

alright gonna give upgrading project to the latest alpha and try to build to see what happens

dull copper May 17, 2019, 3:22 PM

#

btw, I put 10 frame delay on that entity tracker script and now it doesn't crash

#

it's trying to get transforms from entity that doesn't have it yet, despite the entity has been created already

#

don't ask me how that is possible

#

putting small delay fixes is but that's obviously not the right solution

#

physics also don't collide with anything, things just fall through 😃

#

(this is all mainly IL2CPP related)

safe lintel May 17, 2019, 3:24 PM

#

well i did have that problem where stuff from entities doesnt all load at the right time

#

so physics starts working before colliders are loaded in

#

so i would offset player position by like 100 units and hope it loads in by the time it reaches the ground 😄

dull copper May 17, 2019, 3:25 PM

#

this is still very alpha

safe lintel May 17, 2019, 3:25 PM

#

in a build, didnt happen in editor playmode for some reason

dull copper May 17, 2019, 3:26 PM

#

I dunno if I'm as optimistic as Unity is about this physics package leaving preview state this fall 😄

#

I haven't had much issues on mono builds

#

that joint issue is only one I've spotted so far

safe lintel May 17, 2019, 3:28 PM

#

it seems like theres tons of good feedback theyre responding to in the forums which is nice

#

but at the same time its a small sample size of people voicing their concerns with something that is so vital to games, im kinda worried about it being finalized before it gets widespread useage

minor sapphire May 17, 2019, 3:33 PM

#

what? they said physics would leave preview this fall? lol

dull copper May 17, 2019, 3:43 PM

#

well, obviously they don't promise it, like they don't give hard targets usually for about anything 😃

#

Our goal which may or may not change is to be out of preview around Q3. ```

#

from https://forum.unity.com/threads/unity-physics-discussion.646486/#post-4336555

#

@minor sapphire

minor sapphire May 17, 2019, 3:46 PM

#

lol I'm not confident in this target either 😃

safe lintel May 17, 2019, 4:27 PM

#

well project fails to compile with 2019.3 alpha and il2cpp Exception: C:\Program Files\Unity\Hub\Editor\2019.3.0a2\Editor\Data\il2cpp/build/il2cpp.exe did not run properly! not the most useful of error messages

dull copper May 17, 2019, 4:32 PM

#

@safe lintel when you click the error, you see the full list under it

safe lintel May 17, 2019, 4:36 PM

#

sorry closed it shortly after i typed that, did you want to see more of the error? im submitting a repro bug report to em

dull copper May 17, 2019, 4:37 PM

#

nah, I don't need to know it, I know like 3-4 different fails on this atm 😄

#

just saying you see more info when you click it

#

usually the initial IL2CPP fail message doesn't tell anything of value

#

real info is on the longer listing

#

usually I'd test latest release (which I tried but it failed for another reason on IL2CPP) etc

#

I mean latest official Unity release

#

2019.1.3 just released but I failed to get IL2CPP to do anything on 2019.1.2 😄

#

it's funny how hard it fails now as it's been pretty good for a long time

safe lintel May 17, 2019, 4:41 PM

#

weird im getting a missing namespace for UnityEngine.UI in 2019.2 but not .3

dull copper May 17, 2019, 4:41 PM

#

it's because the change is only on 2019.2 betas atm

#

probably next 2019.3 alpha has the ui change as well

safe lintel May 17, 2019, 4:42 PM

#

i wouldve expected 2019.3 to have all of 2019.2's changes?

dull copper May 17, 2019, 4:43 PM

#

nah, these are developed in parallel

#

afaik 2019.3.0a2 has been in development for quite a while

#

at least it has been showing a lot in older issue reports

safe lintel May 17, 2019, 4:46 PM

#

ah ui is a package now

dull copper May 17, 2019, 4:50 PM

#

as for p32 conversion not working and throwing error about active world, @coarse turtle (?) posted this on the forums: https://forum.unity.com/threads/entities-p32-world-active-is-null.680041/#post-4552861

coarse turtle May 17, 2019, 4:50 PM

#

Yea that's me 😃

#

lol

dull copper May 17, 2019, 4:50 PM

#

was there a lot to change?

#

I could upgrade mine but it wouldn't still solve the IL2CPP stuff I'm experiencing

coarse turtle May 17, 2019, 4:51 PM

#

not really on my side I didn't have as many SharedComponentDatas on my side

dull copper May 17, 2019, 4:51 PM

#

ah, I don't have any custom sharedcomponent, but I do use Unity Physics which may be the core issue here

#

it also uses the old bloballocator

#

at this point I think I'll just wait for Unity to upgrade the physics package

coarse turtle May 17, 2019, 4:52 PM

#

Yea

#

I'm surprised the transport layer works still despite the upgrade 🤔

safe lintel May 17, 2019, 4:53 PM

#

im telling you physics works for me in p32 😃

dull copper May 17, 2019, 4:53 PM

#

you use joint scripts from DOTS sample repo?

safe lintel May 17, 2019, 4:53 PM

#

oh joints no

dull copper May 17, 2019, 4:53 PM

#

those were the thing that freaked out for me

#

regular RB sim did work

#

and burst caused hard crash on standalone 😄

#

but I think it's related

#

I have this post with very many edits about all the issues I've encountered with recent versions: https://forum.unity.com/threads/unity-physics-discussion.646486/page-9#post-4547260

coarse turtle May 17, 2019, 4:59 PM

#

Btw @dull copper I haven't looked at the Physics package too much but is it primarily 3d physics?

dull copper May 17, 2019, 4:59 PM

#

yes

#

there will be separate 2D physics thing for DOTS

#

there are some snippet on that thread on how to constrain things into some axis to use it on 2D though

#

but this is the stateless DOTS physics engine codeveloped by Unity and Havok physics team

coarse turtle May 17, 2019, 5:00 PM

#

ah cool, I should take a look sometime soon

#

yea I remember that from the keynote at GDC

dull copper May 17, 2019, 5:00 PM

#

it's still pretty early

#

we just discussed that it doesn't seem likely that they'll reach stable status on Q3 like the initially planned for that package

#

but who knows what they've been cooking behind the curtains

#

right now though it still feels very alpha

coarse turtle May 17, 2019, 5:02 PM

#

ah i think that's fine, the transport layer is the same so I'm expecting some violent changes next iteration haha

dull copper May 17, 2019, 5:02 PM

#

yeah don't get me wrong, I do dig a lot that they are doing this

#

it's actually one of the best things from my POV

coarse turtle May 17, 2019, 5:03 PM

#

same here

dull copper May 17, 2019, 5:03 PM

#

Unity's stock physics is closed box, you can't modify how they use physx with it

#

which has always been huge pain for me

#

there's one feat on physx that Unity is not likely to implement and it's contact modifications

#

it took me like 1-2 days to implement that on unreal with full source access

#

but this new Unity Physics package has all kinds of callbacks built in now

#

you can modify things on all different physics engine stages which is awesome for my purposes

#

main issue with this new package is though that since it's stateless, there's no caching built in, and this will hurt the perf on bigger worlds and simulations

#

it's not something one couldn't work around but it's one big limit on the stock version

#

and Havok guy replied on the forums: We have a pull request going through now with a p32 upgrade. We'll post more details when available.

coarse turtle May 17, 2019, 5:12 PM

#

ah that makes sense - but yea I'll give it a shot

#

I'm working in 2D currently and I've just been wrapping RIgidbody2D into ECS minimally haha

safe lintel May 17, 2019, 5:16 PM

#

wonder if this is a samples update or a package update(or both)

coarse turtle May 17, 2019, 5:17 PM

#

on the ecs side its a samples and package update

#

the samples are just restructured

#

based on the commits

safe lintel May 17, 2019, 5:19 PM

#

i mean for that pull request quote

coarse turtle May 17, 2019, 5:21 PM

#

ah whoops mb

safe lintel May 17, 2019, 5:23 PM

#

hmm getting this when building for 2019.2.0b2 Unexpected exception Mono.Cecil.AssemblyResolutionException: Failed to resolve assembly: 'Unity.Transforms.Hybrid, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'

dull copper May 17, 2019, 6:05 PM

#

@safe lintel they usually go together

#

if they update entities, they update dots sample repo for ecs samples, if they update physics package, they update physics samples from it

#

happened every time in past year or so (altho there's only been two updates for physics one)

dull copper May 17, 2019, 6:28 PM

#

@safe lintel oh and the comment was for physics package in general I believe

#

it makes no sense to update the samples only when it's clear that the physics package itself isn't fully compatible with p32

safe lintel May 17, 2019, 6:29 PM

#

i havent delved deep into joints at all

dull copper May 17, 2019, 6:29 PM

#

would love to get hands on that internal repo :p

safe lintel May 17, 2019, 6:30 PM

#

but there was a lot of stuff on the authoring side which kinda made me wonder if it was that part or if it was the actual physics package

dull copper May 17, 2019, 6:30 PM

#

there are lots of things that only on the samples, sure

#

(for the physics that is)

fickle sapphire May 17, 2019, 8:56 PM

#

Hello! Is a good idea to wrap an Entity in a Component? e.g:

    public struct MoveInput : IComponentData {
        public float2 Axis;
        public Entity target;
    }

The downside that I noticed is that querying by the target is not possible.

tawdry tree May 17, 2019, 9:08 PM

#

Tip! You can use triple backticks (```) before and after a message to make it a code block. if you write csharp or cs right after the first set of backticks, and then make a linebreak, you also get code highlighting. For inline code like this, use single backticks.
```csharp
public void Example(string arg){
//actual code goes here.
//I suggest using 2 spaces of indentation per level
}
```
Produces:

public void Example(string arg){
  //actual code goes here. 
  //I suggest using 2 spaces of indentation per level
}

https://support.discordapp.com/hc/en-us/articles/210298617-Markdown-Text-101-Chat-Formatting-Bold-Italic-Underline-

Discord

Markdown Text 101 (Chat Formatting: Bold, Italic, Underline)

Want to inject some flavor into your everyday text chat? You're in luck! Discord uses Markdown, a simple plain text formatting system that'll help you make your sentences stand out. Here's how to d...

#

As for an actual answer, the entity object/class is really just a couple ids (entity id and version id), so you might be able to query if you save those directly . Don't know what the proper thing for that is to do, and if you want a better answer you might want to add some more specific as to what you're trying to accoplish

coarse turtle May 17, 2019, 9:16 PM

#

posting this here - Joachim noted there was a regression with p32 and best to stay with p31 if you happen to be running in to this issue: https://forum.unity.com/threads/0-0-12-preview-32-nativearray-is-giving-me-a-structlayout-size-error.680323/

Unity Forum

[0.0.12-preview.32] NativeArray is giving me a StructLayout size error

Started getting this error on creation of World, no idea what it refers to.

ArgumentException: All component types containing pointers must use a...

fickle sapphire May 17, 2019, 9:25 PM

#

@tawdry tree this is what i'm trying to accomplish:
joystick -> input system -> process input (move player, change its state)

So i'm not sure if it is just fine to add a InputState (isMoving, isButtonPressed) to the player entity or to create a new entity that contain the input and the owner.

spiral cairn May 17, 2019, 9:26 PM

#

ECS pushes you to add an InputStateComponent that holds the input received to the player entity and use a system to use that data

fickle sapphire May 17, 2019, 9:45 PM

#

thanks @spiral cairn . Probably I was overthinking , I'll create this component sense it make things easier

twin raven May 17, 2019, 10:08 PM

#

Hello! I am fairly new to ECS and trying to get my head around this. I am making a simple targeting system for units. Basically a unit can target many other units. At the moment a unit is just an entity with translation. I already have a system to find which entity to target, but I want to hold on to the information. Should I make new entity for each targeting instance with a ComponentData holding the origin entity and target entity?

First I just want to draw some lines of units targeting other units.

#

Would this kind of approach cause problems when f.e. target unit dies and targeting should be stopped 🤔

#

The only data that is needed is the positions, but from what I understood sharedComponentData is not suitable for this

safe lintel May 17, 2019, 11:44 PM

#

you could use dynamic buffers to store potential or found targets on your unit

spiral cairn May 18, 2019, 2:27 AM

#

https://youtu.be/t11uB7Gl6m8 should help you out @twin raven

YouTube

Code Monkey

Find Target in Unity ECS

Let's see how we can Find the Closest Target in a Pure Unity ECS game. ✅ Get the Project files and Utilities at https://unitycodemonkey.com/video.php?v=t11uB...

▶ Play video

lilac ermine May 18, 2019, 3:30 AM

#

is there a way to use subtractive types as part of the Entities.ForEach query?

#

specifically, i have a reactive group and want to know when any of the required components have been removed

#

i used to do this with multiple queries and groups, but want i was hoping can do now is more like

#

Entities
    .WithAll<Initialized>()
    .WithAny<ComponentType.Subtractive(typeof(RequiredType1), ComponentType.Subtractive(typeof(RequiredType2), ComponentType.Subtractive(typeof(RequiredType3)>()
.ForEach((Entity entity) =>
{
    PostUpdateCommands.RemoveComponent<Initialized>(entity);
});

#

i should say, without building the query + group separately and adding at the end

#

wait, can you not even do that anymore?

lilac ermine May 18, 2019, 4:18 AM

#

ah, i see we can use 'With'

#

but still, it'd be nice to be able to do all this in-line

#

aaaack, seems EntityQueryDesc cannot contain Exclude Component types 😦

odd bay May 18, 2019, 5:28 AM

#

Anyone know if Unity mathematics has a static magnitude function? I can't seem to find it

dull copper May 18, 2019, 5:31 AM

#

@odd bay check the Mathematics.math for size, length, magnitude etc

odd bay May 18, 2019, 5:31 AM

#

it was length

#

I checked magnitude and size beforehand

dull copper May 18, 2019, 5:31 AM

#

yeah, it's usually size or length

#

magnitude sounds like some Unity nonsense naming

#

(for math lib)

odd bay May 18, 2019, 5:31 AM

#

really?

dull copper May 18, 2019, 5:32 AM

#

you don't usually see that used in math libs

odd bay May 18, 2019, 5:32 AM

#

oh, I thought you meant in general

#

why is there a distinction between normalize and normalizesafe

dull copper May 18, 2019, 5:33 AM

#

other is faster I'd assume

odd bay May 18, 2019, 5:33 AM

#

normalize spits out a NaN when the vector has a magnitude of 0, while normalizesafe gives 0, 0

dull copper May 18, 2019, 5:33 AM

#

some want 0.0 even if it's not mathematically correct

odd bay May 18, 2019, 5:33 AM

#

Wouldn't you rather want 0, 0 than an error?

dull copper May 18, 2019, 5:34 AM

#

well, there can be cases where you want nan back in case it's not correct

#

instead of having to check if it's 0,0 value (which is also incorrect)

#

plus if you know beforehand it's never going to be NaN, you can use faster path

odd bay May 18, 2019, 5:35 AM

#

fair points

fickle sapphire May 18, 2019, 10:56 AM

#

Hello, is there a better way to handle the player state?

 var chunkPlayerInput = chunk.GetNativeArray (PlayerInputType);
                var entities = chunk.GetNativeArray (EntityType);

                for (var i = 0; i < chunk.Count; i++) {
                    var input = chunkPlayerInput[i];
                    var entity = entities[i];

                    if (chunk.Has<Idle> (IdleType) == false && input.Moving == false) {
                        Commands.AddComponent (chunkIndex, entity, new Idle ());
                        Commands.RemoveComponent (chunkIndex, entity, typeof (Walk));
                    }

                    if (chunk.Has<Walk> (WalkType) == false && input.Moving) {
                        Commands.AddComponent (chunkIndex, entity, new Walk ());
                        Commands.RemoveComponent (chunkIndex, entity, typeof (Idle));
                    }
                };

#

Didn't like those toggle check :/

tawdry tree May 18, 2019, 11:34 AM

#

I would probably have a PlayerStateComponent with an enum value

enum PlayerState : int { //Explicitly use int
  Idle = 0, //set explicit values...
  Walking = 1, //...technically not necessary but I find it useful
}
public struct PlayerStateComponent : IComponent {
  public PlayerState State;
}

I don't know if components like enums, if not just do something like

public struct PlayerStateComponent : IComponent {
  public int State;
  public PlayerState StateAsEnum => State as PlayerState; 
  public void SetState(PlayerState state) { State = state as int; }
}

Note: I think, but don't know for sure, that this is valid. If you get complaints or exceptions, use (PlayerState)State and (int)state

fickle sapphire May 18, 2019, 12:00 PM

#

Thanks @tawdry tree !

#

@tawdry tree how would you link an animation for each state? i'm trying to follow your approach of having more properties in components

tawdry tree May 18, 2019, 12:19 PM

#

I haven't done any animation stuff, so can't really say, but in whatever driver the animations (a system? I dunno how that works) you'd grab the relevant component(s) and use that to set the animation. The simplest form would just use the state to toggle between animations, but movement in games is often more of a scale (standing->walking->running->sprinting) with lerping between animations

glad solar May 18, 2019, 8:42 PM

#

Can someone explain to me the use of EntityCommandBufferSystem?
I'm studying the github SpawnAndRemove example but i didn't understand the documentation in the docs:
https://docs.unity3d.com/Packages/com.unity.entities@0.0/api/Unity.Entities.EntityCommandBufferSystem.html?q=EntityCommandBufferSystem
when should i use it? everytime i want to "spawn and remove" an entity i should use it? i don't get it.

safe lintel May 18, 2019, 8:55 PM

#

basically in a job you cant access the main thread, so the EntityCommandBufferSystem queues commands for entity creation, destruction and add/remove/set of components on the main thread

#

https://docs.unity3d.com/Packages/com.unity.entities@0.0/manual/entity_command_buffer.html might be more easier reading

solar ridge May 18, 2019, 9:22 PM

#

There is an alternative: exclusive entity transaction. Whilst you still need to move the entities from one world on the main thread that is much faster than the command buffer in some regards

#

Just as a note

glad solar May 18, 2019, 9:30 PM

#

@safe lintel, @solar ridge thank you so much!

icy matrix May 18, 2019, 10:15 PM

#

how could i make the equivelant to the FPS Controller from the standard assets in ecs. along with the parented camera and everything

safe lintel May 18, 2019, 10:54 PM

#

physics samples has a character controller which i used as the starting point for mine

minor sapphire May 19, 2019, 5:15 AM

#

is it possible to get one of my jobs to run on the main thread for debugging purposes?

minor sapphire May 19, 2019, 5:56 AM

#

Or even, does anyone know how to get something like a stopwatch working in a job...?

#

ok so it turns out unity is not complaining about stopwatch usage in the job. didn't expect that as it's a class...

tawdry tree May 19, 2019, 8:47 AM

#

I don't think you should be using stopwatch within the job if you can avoid it, but also don't know if you can force it to run on the main thread. Should be able to?
Use intellisense and see what you can do on a job? ie.

var job = new SomeJob();
job. //see what intellisense suggest, I assume a .Run() or something exists.

minor sapphire May 19, 2019, 10:14 AM

#

stopwatch worked, just needed to see what was taking time in the job

#

run does seem to work but it's not simple cause of dependencies and all that, it likes to complain. wish I could just make everything run on main thread temporarily hmm

low tangle May 19, 2019, 10:56 AM

#

you can

#

just turn off burst compiling and safety checks to on

#

it wont be main thread but you can run stuff you typically wouldn't in it

golden heron May 19, 2019, 12:21 PM

#

Anyone got experience of partioning space for collision detection?

minor sapphire May 19, 2019, 12:22 PM

#

heh Nys, the good old collision stage

#

done some reading, but have not implemented

#

the elevator notes for what I read was something like, consider grid array for smallish spaces, quad/octree for larger spaces, and hashmapping for really large spaces

#

unity physics is another option with the advantage of having other people work on optimising it for you, but the disadvantage that it's really early and leaves a lot to be desired in it's current form

#

wants to know how much havok is going to cost...

golden heron May 19, 2019, 1:06 PM

#

Well, in my case, the huge majority of the space will be empty, i was thinking of using a multidimensional array, with a set up which makes the indexes defined by the position directly. So, if object exists between say (0,0,0) and say (50,50,50), its index would be 0, then on to 1 at (100,50,50) maybe, or, alternately, i could go for something a little more complex, and use nested arrays, the intention being to slice space up into say 5000,5000,5000 cubes, and for each cube containing an object, the rest of the cube has an array created, but the array doesnt exist when the cube is empty. This way, you'd have automatic placements in the structure without half as many overall entries. Of course, one system is, at a conservative estimate, around 160,000 units, circular, by 30,000 units vertically, which approximates to 30,720 cubes for a system, even at low (5000 unit) resolution. Of course, the arrays entries would be 99% empty, but still would need those entries allocated. Also, a system can contain up to maybe 600-700 objects, in approximately 15-20 aggregated groups.

minor sapphire May 19, 2019, 1:08 PM

#

in an environment where the majority of space is empty, I would be looking at hashing playing some role

golden heron May 19, 2019, 1:08 PM

#

Another question... Does anyone know the implications of having code setup up to use x axis as forward, how to go abour converting it to unities z as forward?

#

(I actually have no idea what you mean by hashing?)

#

oh, and thanks for the answer :)

minor sapphire May 19, 2019, 1:09 PM

#

I mean, use something like a hashmap

golden heron May 19, 2019, 1:09 PM

#

I dont know what that is hehe

minor sapphire May 19, 2019, 1:09 PM

#

maybe each 'zone' of yours can be in a hashmap

#

dictionary

golden heron May 19, 2019, 1:10 PM

#

So its like a simple array?

minor sapphire May 19, 2019, 1:10 PM

#

Dictionary<ZoneId, AreaArray>

golden heron May 19, 2019, 1:10 PM

#

Its a list type item? those things make my ecs crawl hehe better than makin me skin crawl tho... hehe

minor sapphire May 19, 2019, 1:10 PM

#

for me, I'm considering just something like
Dictionary<ZoneId, List<Entity>>

#

you've not used a dictionary before?

#

or say, even a HashSet?

#

in native collections land there is MultiHashMap

golden heron May 19, 2019, 1:11 PM

#

Ive use nativearrays, lists, queues, and a few other types of array but not dictionarys specifically.

minor sapphire May 19, 2019, 1:11 PM

#

which is basically a dictionary

golden heron May 19, 2019, 1:12 PM

#

I even used a type of array that doesnt have any idea what the data it holds is, and you gotta cast it when you retrieve, but it stores anything i forget the name tho

minor sapphire May 19, 2019, 1:12 PM

#

Object[] 😃

golden heron May 19, 2019, 1:13 PM

#

No, this was more complex, it was cos i was using multiple layers of arrays within arrays

minor sapphire May 19, 2019, 1:14 PM

#

var arr = new object[10];
arr[0] = new object[10];

#

I don't like this code but, object is anything 😛

#

anyway, you really need to look into Dictionary and HashSet

#

they are really part of the 'basic collection types everyone needs to know'

golden heron May 19, 2019, 1:16 PM

#

It was an arraylist, sk picked cos of its ability to hold different types.

#

Ok, ill look at those.

minor sapphire May 19, 2019, 1:16 PM

#

those are old and superseded by generics.

golden heron May 19, 2019, 1:17 PM

#

Ok, was early in my coding time mind hehe

minor sapphire May 19, 2019, 1:17 PM

#

although, there was a time when I did use arraylist

#

https://docs.microsoft.com/en-us/dotnet/api/system.collections.arraylist?view=netframework-4.8
See the remarks 😃 MS advising to avoid ArrayList 😃

ArrayList Class (System.Collections)

Implements the interface using an array whose size is dynamically increased as required.

golden heron May 19, 2019, 1:19 PM

#

Thats cool, the usage was clunky as hell anyways, i moved on to creating custom class structures in the particular case i had used it before.

minor sapphire May 19, 2019, 1:19 PM

#

anyway for basic spatial mapping where very sparse large space is required, consider Dictionary<ZoneId, List<Entities>>, in ECS world you would be using NativeMutliHashMap<ZoneId, Entity>

#

if nothing is in a zone, it doesn't exist in memory

#

which is good for super sparse situations

golden heron May 19, 2019, 1:20 PM

#

In this case, you are applying a name to the index, not to the index value, so the Zoneid, its an integer?

minor sapphire May 19, 2019, 1:21 PM

#

yeah, use an int or something

#

whatever you ID is 😃

#

<int, Entity>

#

<float3, Entity>

#

whatever you use for identifying your zones

golden heron May 19, 2019, 1:22 PM

#

Ok, so using the < , > is the same as < >, but you are adding two datas cos its a call not a set? Ie, its like List<Entites> = Zones[zoneid];

minor sapphire May 19, 2019, 1:22 PM

#

yes, two type parameters

#

key, value

golden heron May 19, 2019, 1:23 PM

#

I that what i said is wrong then

#

you are defining the type of the index which is usually not necesary, its assumed to be an int

minor sapphire May 19, 2019, 1:23 PM

#

in the case of Dictionary, key is int, value is List<Entity>
for NativeMultiHashmap, key is int, value is Entity (the implementation of NativeMultiHashMap is that you can have multiple of the value)

golden heron May 19, 2019, 1:24 PM

#

Just a sec...

minor sapphire May 19, 2019, 1:24 PM

#

I'm just gonna talk about Dictionaries cause it's easier lol

#

learn that first

#

it's easy

#

then when you get it, learn NativeMultiHashMap

golden heron May 19, 2019, 1:24 PM

#

I know about dictionarys, i just havent used them

#

In regards to the nativemultihashmap - It returns more than one object per index, does this means its creating a list from abitrarily positioned objects at the point of request? Or, does it already have a list it uses directly, and manages the list when you add an object to an index which already has objects?

minor sapphire May 19, 2019, 1:27 PM

#

var peopleAges = new Dictionary<string, int>(); // key is type string, value is type int
peopleAges.Add("Bob", 44);
peopleAges.Add("John", 32);
int JohnAge = peopleAges["John"]; // not safe if "John" is not guaranteed to exist, look into TryGetValue, and Contains

golden heron May 19, 2019, 1:27 PM

#

That makes sense.

#

Before you waste too much time shinyclef

minor sapphire May 19, 2019, 1:27 PM

#

I don't know about how NativeMutliHashMap works internally, but it is equivalent to a dictionary of <key, List<value>>

golden heron May 19, 2019, 1:28 PM

#

I have much experience with multiple languages useage of arrays, from lua's tables through pythons arrays, to c#, so i know what to look at for recognising limits and how to use them :)

#

I used to use some scarily complex lua tables.

dry nymph May 19, 2019, 1:29 PM

#

for spatial grid, I used an entity("key") with dynamic buffer(list of entities at that key) instead of NMHM. faster to clear & easier to access (can be interpreted as array)

#

for each spatial zone

golden heron May 19, 2019, 1:30 PM

#

Used to save the data into files similar to .csv files, ran up to 75mb for some of them, and there was one file per sector for that game hehe

#

Thanks for help guys tho, @minor sapphire and @dry nymph

minor sapphire May 19, 2019, 1:32 PM

#

sngdan that is an interesting approach. so an entity moves into zone 50, it needs to find the 'zone 50' entity , and slot itself into its dynamic buffer?

golden heron May 19, 2019, 1:32 PM

#

Oh i didnt get thats what he meant

#

Makes sense, i did sorta think of that, but meant to ask if it would be a difficult way or not... can you request an entity by name?

minor sapphire May 19, 2019, 1:33 PM

#

I'm not 100% sure that's what he meant yet lol

golden heron May 19, 2019, 1:33 PM

#

I thought it would be slow?

dry nymph May 19, 2019, 1:34 PM

#

There are many ways to do it and it really depends on the use case.

minor sapphire May 19, 2019, 1:34 PM

#

entities don't have names, I'm wondering on this part myself

dry nymph May 19, 2019, 1:35 PM

#

I did this in 2D but it is really the same concept in 3D, if you just use a spatial grid (i.e. no tree structure)

minor sapphire May 19, 2019, 1:36 PM

#

oh right so you start with an array

dry nymph May 19, 2019, 1:36 PM

#

I can explain in a minute....have to do something else quickly

minor sapphire May 19, 2019, 1:36 PM

#

this works as long as your space is not 'too large' (whatever your memory limits may be)

#

I have this feeling that Nys's game is 'very large' lol

golden heron May 19, 2019, 1:37 PM

#

Well, my thinking was quite simple, using a nested array structure in coarse resolution with an if(zones[zoneid].count == null) then area is empty

#

Dude you want an idea of how large? ehe

minor sapphire May 19, 2019, 1:37 PM

#

yes

#

because for this problem it changes solution 😛

golden heron May 19, 2019, 1:37 PM

#

i have a single player mockup you can try?

minor sapphire May 19, 2019, 1:38 PM

#

just tell me, how big would your grid be

#

scrolls up

golden heron May 19, 2019, 1:38 PM

#

well my reasoning for the array multi layers is that the bulkiest part of the array, the coarse layer, would always already be allocated in memory. then the smaller finer parts would be all that is reallocated

dry nymph May 19, 2019, 1:39 PM

#

OK, back now. let's get some basic parameters first

#

how many entities (that can collide), what is the size of the game area and the density of entities?

golden heron May 19, 2019, 1:40 PM

#

Well, im aiming for the server to be running the simulation for a thousand systems, with each system being 160,000 units by 30,000 units approximately, but with nothing stoppjng players from flying off into the void.

minor sapphire May 19, 2019, 1:40 PM

#

so, big

golden heron May 19, 2019, 1:40 PM

#

the desnity is very low, with only systems containing players having collisions considered

minor sapphire May 19, 2019, 1:40 PM

#

how many 'active systems'?

golden heron May 19, 2019, 1:41 PM

#

the system may contaun up to 600-700 objects, but those will never be in more than 20 groups

#

deoends on the number of players, but initially consider one system as being active, ill work on duplication later

#

(the majority of objects are asteroids in a field moving together, plus, every object is orbiting the sun, except the ships and the sun itself)

dry nymph May 19, 2019, 1:42 PM

#

It looks like you might be better of with a tree structure for partitioning the space. This is usually better if you can not predict certain "Hot spot areas" and if you have low density

minor sapphire May 19, 2019, 1:43 PM

#

his array or array idea was sorta trying to be a two level tree, but I'd be looking at hash map or octree in this case

golden heron May 19, 2019, 1:44 PM

#

im also intending to use only aabb and sphere colliders, in theory tho, not actual colliders, its gonna be pure maths

dry nymph May 19, 2019, 1:44 PM

#

but it is also more complicated 😃 To get started it is not bad to just partition the space in equal pieces (like you described in the beginning, if I got this right)

#

This is what I had in 2D AABB

📎 SPOILER_Screen_Shot_2019-02-08_at_6.13.35_PM.png

minor sapphire May 19, 2019, 1:45 PM

#

is it essentially a grid? but done with entities and dynamicbuffers?

dry nymph May 19, 2019, 1:46 PM

#

Yes

golden heron May 19, 2019, 1:46 PM

#

well, my thoughts were based on using coarse and the medium, then fine say 5000, 1000, 10 for the unit cubes, where the final collision map would be mostly empty entries, so the object when it checks if its colliding would say "if my region has > 1 objects, check medium, if more than 1, check fine

minor sapphire May 19, 2019, 1:46 PM

#

how do you look up the right entity in this case?

dry nymph May 19, 2019, 1:46 PM

#

I iterated through all entities every frame

golden heron May 19, 2019, 1:46 PM

#

(im sat outside atm cant read the screen well, ill read properly jn a mo and respond)

minor sapphire May 19, 2019, 1:46 PM

#

I mean, how do you find 'Entity Zone 5'?

dry nymph May 19, 2019, 1:47 PM

#

just by index

minor sapphire May 19, 2019, 1:47 PM

#

is it just sitting in some NativeArray?

#

right

#

and this was faster than NMHM?

#

probably would be

dry nymph May 19, 2019, 1:47 PM

#

yes - I tested about 10 different approaches (with different containers and with different degrees of parallelism)

minor sapphire May 19, 2019, 1:47 PM

#

it's essentially a grid after all, but the dynamic buffer allows you to keep memory down depending on your default size

#

interesting I'll have to keep this concept in mind 😄

dry nymph May 19, 2019, 1:48 PM

#

The problem is that this is about 3-4 months back and all on old API

minor sapphire May 19, 2019, 1:49 PM

#

everything just gets twice as hard in ECS world lol

dry nymph May 19, 2019, 1:50 PM

#

Let me try to locate the file...

golden heron May 19, 2019, 1:51 PM

#

How many entities are in your simulation, sngden? the pic? Looks like several thousand? And you said there are aabb boxes only for collision?

#

Yes it does, @minor sapphire hehe

#

Does the iteration of all the entitys happen on the main thread? And does an entity for each region always exist? Or only when there are objects in its region?

dry nymph May 19, 2019, 1:55 PM

#

I found it - but I literally have not opened Unity in the last 3 months....inspector window does not open...I might have to reinstall Unity...

minor sapphire May 19, 2019, 1:55 PM

#

haha don't worry too much

dry nymph May 19, 2019, 1:56 PM

#

The minimum of entites was 10,000 that I used (all colliding with each other) - up to 50,000 if I recall correctly - maybe I posted something in the forum as well, cant remember

golden heron May 19, 2019, 1:56 PM

#

cool - i dont think my computer would do so well as yours hehe

#

My plan is gonna be to code the game then buy a fast pc when its ready for release hehe i cant justify it till then

dry nymph May 19, 2019, 1:58 PM

#

yes, I have a Unity installation problem 😦 how do I post code here?

golden heron May 19, 2019, 1:58 PM

#

```cs

#

im not sure if cs needs capitalising... i always do

dry nymph May 19, 2019, 2:00 PM

#

'''CS test '''

#

CS test

#

 protected override void OnStartRunning()
        {
            InitGrid();
            
            CreateNativeContainers();
            
            // Setup Entities (Keys) with Bufferes (Values)
            for (int i = 0; i < myGrid.CellCount; i++)
            {
                collisionBufferEntityArray[i] = EntityManager.CreateEntity(ComponentType.ReadWrite<CollisionInfoBuffer>(), ComponentType.ReadWrite<CollisionInfoBufferDummy>());
            }
            
            collisionCandidateKeys_Group = GetComponentGroup(ComponentType.ReadWrite<CollisionInfoBuffer>(), ComponentType.ReadWrite<CollisionInfoBufferDummy>());    
            sprite_Group = GetComponentGroup(ComponentType.ReadWrite<SpriteTag>(), ComponentType.ReadWrite<Box>());
        }

#

        {
            ClearNativeContainers();
            
            var collisionBufferCandiateFromEntity = GetBufferFromEntity<CollisionInfoBuffer>();
    
            // Clear spatial grid - ParallelFor
            jobHandle = new ClearCandidateBufferFromEntityDictionaryParallelForJob
            {
                collisionBufferEntityArray                = collisionBufferEntityArray,
                collisionBufferCandiateFromEntity        = collisionBufferCandiateFromEntity
            }.Schedule(collisionBufferEntityArray.Length, 1, jobHandle);
            
            // Assign sprites to spacial grid - SINGLE IJobProcessComponentDataWithEntity
            jobHandle = new SpriteToGridBufferNewApiPersistentJob
            {
                grid                                    = myGrid,
                keyArray                                = collisionBufferCandiateFromEntity,
                keyIndexArray                            = collisionBufferEntityArray
            }.ScheduleGroupSingle(sprite_Group, jobHandle);
            
            // Check collisions per grid - ParallelFor
            jobHandle = new AABBCollisionBufferToHashMapNewApiJob
            {
                collisionCandidates                     = collisionBufferCandiateFromEntity,
                DistinctCollisionPairHashMap            = distinctCollisionPairHashMap.ToConcurrent(),
                DistinctCollisionEntityHashMap          = distinctCollisionEntityHashMap.ToConcurrent()
            }.ScheduleGroup(collisionCandidateKeys_Group, jobHandle);
        
            // start processing all scheduled jobs
            JobHandle.ScheduleBatchedJobs();
            //jobHandle.Complete(); 
            return jobHandle;
        }```

#

better 😃 haha

minor sapphire May 19, 2019, 2:04 PM

#

📎 unknown.png

#

like this

dry nymph May 19, 2019, 2:05 PM

#

let me see if I can edit this

minor sapphire May 19, 2019, 2:07 PM

#

📎 unknown.png

dry nymph May 19, 2019, 2:08 PM

#

ah crap...just copy it...it is old API anyway and has many workarounds (i.e. I needed a "Dummy Component" to use IProcessComponentWith Entity)

minor sapphire May 19, 2019, 2:08 PM

#

😄

#

protected override void OnStartRunning()
{
    InitGrid();
    
    CreateNativeContainers();
    
    // Setup Entities (Keys) with Bufferes (Values)
    for (int i = 0; i < myGrid.CellCount; i++)
    {
        collisionBufferEntityArray[i] = EntityManager.CreateEntity(ComponentType.ReadWrite<CollisionInfoBuffer>(), ComponentType.ReadWrite<CollisionInfoBufferDummy>());
    }
    
    collisionCandidateKeys_Group = GetComponentGroup(ComponentType.ReadWrite<CollisionInfoBuffer>(), ComponentType.ReadWrite<CollisionInfoBufferDummy>());    
    sprite_Group = GetComponentGroup(ComponentType.ReadWrite<SpriteTag>(), ComponentType.ReadWrite<Box>());
}

dry nymph May 19, 2019, 2:08 PM

#

Why don't you open a forum topic with this....it is not a unique problem and maybe some others chip in

minor sapphire May 19, 2019, 2:09 PM

#

JobHandle MyUpdateJobified(JobHandle jobHandle)
{
    ClearNativeContainers();
    
    var collisionBufferCandiateFromEntity = GetBufferFromEntity<CollisionInfoBuffer>();

    // Clear spatial grid - ParallelFor
    jobHandle = new ClearCandidateBufferFromEntityDictionaryParallelForJob
    {
        collisionBufferEntityArray                = collisionBufferEntityArray,
        collisionBufferCandiateFromEntity        = collisionBufferCandiateFromEntity
    }.Schedule(collisionBufferEntityArray.Length, 1, jobHandle);
    
    // Assign sprites to spacial grid - SINGLE IJobProcessComponentDataWithEntity
    jobHandle = new SpriteToGridBufferNewApiPersistentJob
    {
        grid                                    = myGrid,
        keyArray                                = collisionBufferCandiateFromEntity,
        keyIndexArray                            = collisionBufferEntityArray
    }.ScheduleGroupSingle(sprite_Group, jobHandle);
    
    // Check collisions per grid - ParallelFor
    jobHandle = new AABBCollisionBufferToHashMapNewApiJob
    {
        collisionCandidates                     = collisionBufferCandiateFromEntity,
        DistinctCollisionPairHashMap            = distinctCollisionPairHashMap.ToConcurrent(),
        DistinctCollisionEntityHashMap          = distinctCollisionEntityHashMap.ToConcurrent()
    }.ScheduleGroup(collisionCandidateKeys_Group, jobHandle);

    // start processing all scheduled jobs
    JobHandle.ScheduleBatchedJobs();
    //jobHandle.Complete(); 
    return jobHandle;
}

#

oh I was curious about your approach, I'm using unity physics for the time being

#

I might decide to do it a different way, but not just yet heh, focusing on AI at the moment

#

Nys is looking at implementing this now though

#

so maybe he'll start a thread?

dry nymph May 19, 2019, 2:11 PM

#

My approach is really super simple. Spatial Grid Broad Phase + AABB. I will copy for your the Grid allocation job....then you see how it assigns to grid

#

    [BurstCompile]
    public struct SpriteToGridBufferNewApiPersistentJob : IJobProcessComponentDataWithEntity<Box>
    {
        [ReadOnly] public ColGrid grid;
        [WriteOnly] public BufferFromEntity<CollisionInfoBuffer> keyArray;
        [ReadOnly] public NativeArray<Entity> keyIndexArray;
            
        public void Execute(Entity e, int i, [ReadOnly] ref Box box)
        {    
            var boxMinGrid = (int2) ((box.Center - box.Extends - grid.Min) * grid.OneOverCellSize);
            var boxMaxGrid = (int2) ((box.Center + box.Extends - grid.Min) * grid.OneOverCellSize);
                
            for (int x = boxMinGrid.x; x <= boxMaxGrid.x; x++)
            {
                if (x >= 0 && x < grid.Dim.x)
                {
                    for (int y = boxMinGrid.y; y <= boxMaxGrid.y; y++)
                    {
                        if (y >= 0 && y < grid.Dim.y)
                        {
                            var pos = x + y * grid.Dim.x;
                            var key = keyIndexArray[pos];
                            keyArray[key].Add(new CollisionInfoBuffer{entity = e, box = box});
                        }
                    }
                }
            }
        }
    }

glad solar May 19, 2019, 3:18 PM

#

It seems strange to me as i go deep, how to inspect an Entity after i instantiate it in the world?
It is in memory and when i select the entity from my system i can see the public variables i set changing when i do an action, but the entity isn't visible in the scene.

safe lintel May 19, 2019, 3:20 PM

#

i think it took me over a month to remember that discord code thingy 😃

#

use the entity debugger, i think its window > analysis > entity debugger

#

oh wait sounds like the second part of your sentence is doing that, you cant just select an entity in the scene like an old gameobject

#

you would have to make some sort of monobehaviour bridge script to relay info back and forth from the entity representation to script if you wanted to do that

golden heron May 19, 2019, 3:24 PM

#

Thanks @dry nymph sorry got pulled away

glad solar May 19, 2019, 3:41 PM

#

@safe lintel I know. I can see my entity on Entity Debugger Window. I select it and its values are ok, but it is not visible in the scene. I did the same instantiation as the "HelloCube" example number 5 did. But my cube is not showing in the scene. i don't see it.

#

By the fact the mesh of my prefab is in a child gameobject the Entity is not rendering it?
I don't see the RenderMesh System in my entity as the HelloCube example does.

📎 unknown.png

sacred tundra May 19, 2019, 4:39 PM

#

would it be sane to use the job system for an infinite terrain generator? 🤔

safe lintel May 19, 2019, 5:00 PM

#

@glad solar do you have the hybrid renderer package installed in the project?

glad solar May 19, 2019, 5:02 PM

#

@safe lintel didn't even know about it.
I'm converting and destroying the gameobject as i go pure ECS. Does this affect it? or do i have to have it anyway?

safe lintel May 19, 2019, 5:04 PM

#

you will need it if you are destroying gameobjects

#

otherwise you wont be able to render it

glad solar May 19, 2019, 5:05 PM

#

aaahhh... it suppose to be a dependency for Entities package. lol
Thank you so much!

#

\o/

#

Rigidbody still not in pure USC atm right?

safe lintel May 19, 2019, 5:08 PM

#

the unity physics package is for pure ecs, and has rigidbodies

odd bay May 19, 2019, 5:08 PM

#

I can't figure out how to get the collisionworld in a job with unity physics

safe lintel May 19, 2019, 5:13 PM

#

you need the BuildPhysicsWorld so like in OnCreate m_BuildPhysicsWorldSystem = World.GetOrCreateSystem<BuildPhysicsWorld>(); and then to pass into your job params CollisionWorld = m_BuildPhysicsWorldSystem.PhysicsWorld.CollisionWorld

#

you may or may not want PhysicsWorld.NumDynamicBodies as well, this is something im still fuzzy on why this is queried for rigidbody checking

golden heron May 19, 2019, 5:22 PM

#

Anyone fancy helping me to work out a rotational momentum system?

#

I can manage to get the turning going ok, but i want it to have a rotational speed which accelerates based on forces, done manually.

glad solar May 19, 2019, 5:22 PM

#

@safe lintel TY!!!

odd bay May 19, 2019, 5:33 PM

#

@safe lintel Thanks for helping out with that, but I'm still getting an error. When I do a CollisionWorld CastRay, I'm getting a "Slice may not be used on a restricted range array" error

safe lintel May 19, 2019, 5:34 PM

#

what does your job look like?

odd bay May 19, 2019, 5:38 PM

#

    struct BulletJob : IJobForEachWithEntity<BulletStats, Translation, Rotation>
    {
        //public EntityCommandBuffer.Concurrent commandBuffer;
        public CollisionWorld world;
        public float deltaTime;

        public void Execute(Entity entity, int index, ref BulletStats stats, ref Translation translation, ref Rotation rotation)
        {
            RaycastInput raycastInput = new RaycastInput
            {
                Ray = new Ray { Origin = translation.Value, Direction = forward(rotation.Value) },
                Filter = CollisionFilter.Default
            };
            RaycastHit hit = new RaycastHit();
            if (world.CastRay(raycastInput, out hit))
            {
                //Entity hitEntity = world.Bodies[hit.RigidBodyIndex].Entity;
                //commandBuffer.AddComponent(index, hitEntity, new LifeTime { Value = 0 });
            }
            translation.Value += forward(rotation.Value) * stats.speed * deltaTime;
        }
    }

safe lintel May 19, 2019, 5:52 PM

#

i think you need to pass in the numdynamicbodies number from the collision world

odd bay May 19, 2019, 5:53 PM

#

where would I use numdynamicbodies though

safe lintel May 19, 2019, 5:53 PM

#

if (hit.RigidBodyIndex < NumDynamicBodies)

odd bay May 19, 2019, 5:56 PM

#

Just tried it, still getting the same error

#

    struct BulletJob : IJobForEachWithEntity<BulletStats, Translation, Rotation>
    {
        //public EntityCommandBuffer.Concurrent commandBuffer;
        public CollisionWorld world;
        public int numDynamicBodies;
        public float deltaTime;

        public void Execute(Entity entity, int index, ref BulletStats stats, ref Translation translation, ref Rotation rotation)
        {
            RaycastInput raycastInput = new RaycastInput
            {
                Ray = new Ray { Origin = translation.Value, Direction = forward(rotation.Value) },
                Filter = CollisionFilter.Default
            };
            RaycastHit hit = new RaycastHit();
            world.CastRay(raycastInput, out hit);
            if (hit.RigidBodyIndex < numDynamicBodies)
            {
                //Entity hitEntity = world.Bodies[hit.RigidBodyIndex].Entity;
                //commandBuffer.AddComponent(index, hitEntity, new LifeTime { Value = 0 });
            }
            translation.Value += forward(rotation.Value) * stats.speed * deltaTime;
        }
    }

#

Just to make sure I'm doing it right

safe lintel May 19, 2019, 5:57 PM

#

wait can you paste the full error message?

odd bay May 19, 2019, 5:58 PM

#

📎 unknown.png

safe lintel May 19, 2019, 6:06 PM

#

hmm maybe try adding hit.RigidBodyIndex != -1 && hit.RigidBodyIndex < numDynamicBodies but i think i was getting nativeslice index out of range when used that

odd bay May 19, 2019, 6:07 PM

#

still broken

#

It'd be great if the unity physics samples were in ECS

safe lintel May 19, 2019, 6:08 PM

#

https://github.com/Unity-Technologies/EntityComponentSystemSamples/blob/fc601f9a729208d1988171e3d36f50acdd23a516/UnityPhysicsExamples/Assets/Common/Scripts/MousePick/MousePickBehaviour.cs

GitHub

Unity-Technologies/EntityComponentSystemSamples

Contribute to Unity-Technologies/EntityComponentSystemSamples development by creating an account on GitHub.

#

that has raycasting in the physics samples interacting with rigidbodies

#

ill be honest i dont see anything wrong with your code there so not really sure

odd bay May 19, 2019, 6:12 PM

#

public class BulletSystem : JobComponentSystem
{
    //EntityCommandBufferSystem commandBufferSystem;
    BuildPhysicsWorld buildPhysicsWorldSystem;

    protected override void OnCreate()
    {
        buildPhysicsWorldSystem = World.GetOrCreateSystem<BuildPhysicsWorld>();
    }

    struct BulletJob : IJobForEachWithEntity<BulletStats, Translation, Rotation>
    {
        //public EntityCommandBuffer.Concurrent commandBuffer;
        public CollisionWorld world;
        public int numDynamicBodies;
        public float deltaTime;

        public void Execute(Entity entity, int index, ref BulletStats stats, ref Translation translation, ref Rotation rotation)
        {
            RaycastInput raycastInput = new RaycastInput
            {
                Ray = new Ray { Origin = translation.Value, Direction = forward(rotation.Value) },
                Filter = CollisionFilter.Default
            };
            RaycastHit hit = new RaycastHit();
            world.CastRay(raycastInput, out hit);
            if (hit.RigidBodyIndex != - 1 && hit.RigidBodyIndex < numDynamicBodies)
            {
                //Entity hitEntity = world.Bodies[hit.RigidBodyIndex].Entity;
                //commandBuffer.AddComponent(index, hitEntity, new LifeTime { Value = 0 });
            }
            translation.Value += forward(rotation.Value) * stats.speed * deltaTime;
        }
    }

    protected override JobHandle OnUpdate(JobHandle inputDeps)
    {
        BulletJob job = new BulletJob
        {
            //commandBuffer = commandBufferSystem.CreateCommandBuffer().ToConcurrent(),
            world = buildPhysicsWorldSystem.PhysicsWorld.CollisionWorld,
            numDynamicBodies = buildPhysicsWorldSystem.PhysicsWorld.CollisionWorld.NumBodies,
            deltaTime = UnityEngine.Time.deltaTime
        };

        return job.Schedule(this, inputDeps);
    }
}

#

Here's the full script this time

#

maybe there's something wrong with it outside of the job

safe lintel May 19, 2019, 6:28 PM

#

maybe do World.Active.GetOrCreateSystem<BuildPhysicsWorld>();

odd bay May 19, 2019, 6:29 PM

#

nope

#

this is driving me crazy

glad solar May 19, 2019, 6:33 PM

#

How do you guys approuch the input with pure ECS?
I'm failling to pass the Input information from what the player press (example: Input.GetMouseButton(1);)

Can anyone point/give me an example, please?

odd bay May 19, 2019, 6:34 PM

#

I'm new to ECS as well, so my way may not be the best

#

but you're supposed to pass in the input into the job I think

#

since a lot of unity's old stuff only works on the main thread

#

So in the job struct you declare a variable such as "public bool mouseClick" and in your JobHandle when you declare your job you pass in your Input.GetMouseButton

tawdry tree May 19, 2019, 6:36 PM

#

The simple way is to grab the input in the relevant system and send it to the job, though I believe there are more robust ways to do it.

odd bay May 19, 2019, 6:37 PM

#

maybe the new input system will let you do these things directly in jobs rather than passing it into one

glad solar May 19, 2019, 6:37 PM

#

Yeah i'm trying to use ComponentSystem to get the Inputs, but when i convert the GameObject to Entity, seems ComponentSystem doesn't recognize the Entity once in memory anymore.
I need for movement. In my scene the player only move if holding right mouse button.

vagrant surge May 19, 2019, 6:38 PM

#

for imputs you dont need to go hard on the job system to begin with

#

so just add an Imput component to entities, and write the imput data on it from a normal system

#

like bjump = true, movex = 0.5 in that struct

glad solar May 19, 2019, 6:43 PM

#

indeed that's what i was doing

namespace Game.Data {
   using UnityEngine;

   public class InputData : MonoBehaviour {
      public bool canMove;
   }
}```
```cs
namespace Game.Systems {
   using Game.Data;
   using Unity.Entities;
   using UnityEngine;

   public class InputSystem : ComponentSystem {
      protected override void OnUpdate() {
         bool canMove = Input.GetMouseButton(1);
         Entities.ForEach((InputData data) => {
            data.canMove = canMove;
         });
      }
   }
}```
Quite simple, but when i start my Movement System using `JobComponentSystem` and added `IConvertGameObjectToEntity`, then my input system is not working anymore.

#

and then i thought: maybe there is a way to handle inputs in pure ecs that isn't in github's example.

vagrant surge May 19, 2019, 6:45 PM

#

that i dont know

tawdry tree May 19, 2019, 6:45 PM

#

check the ECS debugger if your system is active

vagrant surge May 19, 2019, 6:46 PM

#

but in general what you got there is defeinitely the normal way

tawdry tree May 19, 2019, 6:46 PM

#

Sounds like a configuration/setup error

#

I assume you have some other system that checks canMove and actually moves the thing?

glad solar May 19, 2019, 6:46 PM

#

In Entity Debugger, the "Input system" is not catting it. before i convert it and instantiate as entity, it was getting it.

tawdry tree May 19, 2019, 6:47 PM

#

Does the entity have the relevant components after conversion?

#

'cus, you know, entities need components for the system to act on

glad solar May 19, 2019, 6:52 PM

#

@tawdry tree before i work on other systems, i need to make sure this one is working. right?

golden heron May 19, 2019, 6:52 PM

#

So, any tips to try and get a rotational momentum system going? I've gotten the limited speeds and stuff also accelerations, but im getting wierd behaviour im not sure whats causing it...

tawdry tree May 19, 2019, 6:53 PM

#

That system on its own doesn't really do much, and a mover system is dead simple.
Have you looked at the HelloECS samples? They cover this stuff.
Other than that, which components does your entity have after conversion?

golden heron May 19, 2019, 6:53 PM

#

(im pretty sure part of the reason it doesnt work is my system really is a mess :( )

tawdry tree May 19, 2019, 6:54 PM

#

Nysc, that's a pretty undefined question, maybe drop your code in a pasetbin or something so we can look over it? And/or refine the question

golden heron May 19, 2019, 6:55 PM

#

Im kinda looking for a generalised answer - somewhere i might be able to find some code that can allow me to apply an acceleration number, per axis, and limit said forces for thrust etc, and, for the speeds to accumulate and then run down like monobehaviour rigid bodies.

#

ill post what i have so far in a mo, but not gonna rush, let @glad solar finish ;)

glad solar May 19, 2019, 6:57 PM

#

@tawdry tree if the value (canMove) was changing when i click/hold the mouse button, i would be thinking in other systems. And Hello Cube from github work with static value. that's not useful for me right now.

tawdry tree May 19, 2019, 6:57 PM

#

So... the relevant physics equations for simulating angular momentum? This server is not the right place for that, but when you have that you could come back with whatever your implementation looks like? Or am I misunderstanding?

golden heron May 19, 2019, 6:59 PM

#

Yeah thats what i want - a manual in-betweener to take the lookrotation direct turns and start calculating them as mass and stuff, the only bit im having trouble with, is having a rotational and scaleable force applied manually.

#

I can handle motion, and the acquisition of force values fine.

tawdry tree May 19, 2019, 7:00 PM

#

@glad solar Have you defined a CanMove component? As far as I know it cannot convert monobehaviours for you, so the entity you end up with after conversion would have no component for the system to target

safe lintel May 19, 2019, 7:00 PM

#

@odd bay I added readonly and some dependencies for the job(i also removed some stuff to make sure it worked) but try it with the changes(and re add your code)
https://hastebin.com/aheratopuw.cs

safe gate May 19, 2019, 7:01 PM

#

Hey @safe lintel! I was trying out the code for the camera that you showed me, and it is not wqorking

tawdry tree May 19, 2019, 7:01 PM

#

To begin with, it seems from your code like you might not quite understand the basics of ECS - You're supposed to have all of those (Entity, Component, System)

safe gate May 19, 2019, 7:01 PM

#

I actually am using it for Light, does Light work with ECS?

safe lintel May 19, 2019, 7:01 PM

#

i dont remember what i posted 😄

safe gate May 19, 2019, 7:02 PM

#

When I add ConvertToEntity to a Light, everything goes dark. Does Light not work as an entity?

tawdry tree May 19, 2019, 7:03 PM

#

Sounds like it doesn't - a lot of things are not ECS ready yet

safe lintel May 19, 2019, 7:04 PM

#

lights dont exist in pure ecs yet

#

so you would need inject instead of destroy

golden heron May 19, 2019, 7:04 PM

#

What exactly does that do, thelebaron?

safe lintel May 19, 2019, 7:04 PM

#

does what part

tawdry tree May 19, 2019, 7:05 PM

#

@glad solar can you send a screenshot of the entity as it looks in the debugger after conversion?
I think your issue is that you try to affect CanMove MonoBehaviours, and entities cannot have MonoBehaviours.

odd bay May 19, 2019, 7:05 PM

#

@safe lintel well it's not throwing any errors anymore

#

I don't know if it works yet though

golden heron May 19, 2019, 7:06 PM

#

the inject thing, what does it do?

#

(I assume you mean convert an inject rather than convert and destroy?)

safe lintel May 19, 2019, 7:08 PM

#

i think it should add the transform as a component when it creates an entity for the gameobject but im not sure now, never actually checked

tawdry tree May 19, 2019, 7:08 PM

#

Can someone who has actually used the GameObject to Entity stuff explain to Plinio the 101 of how that works? Ie. the minimal code for having a gameobject and ending up with an entity with a component.
I haven't used it since preview 14 or something of the ECS package, so I don't know how it works now

golden heron May 19, 2019, 7:08 PM

#

so the entity basically inherits only the position and orientation?

#

And scale, i guess

glad solar May 19, 2019, 7:08 PM

#

@tawdry tree yeah i'm trying to think now a way to have information from a GameObject to be pass to an Entity in memory.
You're right. it doesn't have it because it's not a component added to the entity. So i'd make that system not be a pure ECS for the sake of Input system, but now i have the issue of transfering the data to an pure ECS entity.

vagrant surge May 19, 2019, 7:10 PM

#

i really dislike the way converting gameobjects works. Should have worked like Entitas does instead

tawdry tree May 19, 2019, 7:10 PM

#

BTW, what version of the ECS and hybrid packages are you using, @glad solar ?

vagrant surge May 19, 2019, 7:10 PM

#

at least until ecs editor works

golden heron May 19, 2019, 7:10 PM

#

@glad solar you should look at the hello ecs setup, you create game objects with a "convert to entity" script, and component proxy scripts attached, during conversion the proxies are what defines the component datas added to the entity, and what data they have

#

is that what you meant to explain? Im on the newest ecs

tawdry tree May 19, 2019, 7:11 PM

#

If Plinio isn't on the newest, stuff might've changed

glad solar May 19, 2019, 7:11 PM

#

@tawdry tree the latest

safe lintel May 19, 2019, 7:11 PM

#

so inject adds localtoworld, rotation and translation, on a gameobject that has a light, it might add more like a scale if I had set the gameobjects scale to be other than 1. i think it also added the light as a component(entitydebugger search for Light components shows the entity, but the debugger doesnt actually show monobehaviour components on the inspector panel)

golden heron May 19, 2019, 7:11 PM

#

Btw, this works for an object in a scene (converted at runtime, when you press play, or, its delayed if you start disabled until the object is enabled.) or when instantiated(same as before)

tawdry tree May 19, 2019, 7:12 PM

#

Direct link to relevant Hello ECS git:
https://github.com/Unity-https://github.com/Unity-Technologies/EntityComponentSystemSamples/tree/master/Samples/Assets/HelloCube/5. SpawnFromMonoBehaviour

golden heron May 19, 2019, 7:12 PM

#

thanks thelebaron

glad solar May 19, 2019, 7:12 PM

#

@golden heron i used IConvertGameObjectToEntity

golden heron May 19, 2019, 7:12 PM

#

i think thats like doing it manually

tawdry tree May 19, 2019, 7:13 PM

#

No wait, I think this might not be it, I might've been to hasty from the name

golden heron May 19, 2019, 7:13 PM

#

When you use a spawner it seems you can use prefabs via the method i described, and on those objects, have multiple component proxies and data that is gonna be on the entity, so its very similar to the old useage of prefabs.

tawdry tree May 19, 2019, 7:13 PM

#

Herp, spawn from monobehavior, not entity

glad solar May 19, 2019, 7:15 PM

#

@golden heron I copied from the example in HelloCube

namespace Game.Controllers {
   using System;
   using UnityEngine;
   using Unity.Entities;

   public class GameController : MonoBehaviour {
      public GameObject playerPrefab;

      private void Start() {
         if (!IsAssignsOk())
            return;

         SpawnPlayer();
      }

      private void SpawnPlayer() {
         Entity playerEntity = GameObjectConversionUtility.ConvertGameObjectHierarchy(playerPrefab, World.Active);
         EntityManager eManager = World.Active.EntityManager;

         Entity player = eManager.Instantiate(playerEntity);
      }

      private bool IsAssignsOk() {
         return
            (playerPrefab != null);
      }
   }
}```
I'll think a little and try a few try here

golden heron May 19, 2019, 7:15 PM

#

My spawner is a monobehaviour which converts at play, and the creates an entity, which gets picked up by the system which then reads the data from its components, from the proxies, and then spawns the right stuff, and destroys the spawner entity (as is done in hello ecs), and then the objects it spawns are gameobject prefabs, which are then converted to entitys, same as the spawner but with different data.

#

Yes, thats the code mine is based on

#

no wait

#

oh, its a player spawner

glad solar May 19, 2019, 7:16 PM

#

in my prefab i have the InputData on it.

golden heron May 19, 2019, 7:16 PM

#

i havenet tried anything with players under control yet, my implementation is data driven server backend stuff

#

But, if its got the right components on the entity, this should work.

#

Might be good to hardcode the proxy for this to offer only one spawn, instead of the usual connection to the monobehaviour variables.

#

well, you can do it this way too hang on

#

Yeah, that should be fine, i cant see why not

tawdry tree May 19, 2019, 7:19 PM

#

This is what they put on their gameobject
https://github.com/Unity-Technologies/EntityComponentSystemSamples/blob/master/Samples/Assets/HelloCube/2. IJobForEach/RotationSpeedAuthoring_IJobForEach.cs
This is the component created from the above monoBehaviour
https://github.com/Unity-Technologies/EntityComponentSystemSamples/blob/master/Samples/Assets/HelloCube/2. IJobForEach/RotationSpeed_IJobForEach.cs

GitHub

Unity-Technologies/EntityComponentSystemSamples

Contribute to Unity-Technologies/EntityComponentSystemSamples development by creating an account on GitHub.

GitHub

Unity-Technologies/EntityComponentSystemSamples

Contribute to Unity-Technologies/EntityComponentSystemSamples development by creating an account on GitHub.

glad solar May 19, 2019, 7:19 PM

#

i thought since the prefab have InputData, after converting it... InputSystem should detect the entity instantiated. but naaahh....

golden heron May 19, 2019, 7:20 PM

#

Ok, look for the entity in the debugger.

#

Check it has the components - disable all other entity spawning and you should be able to have just 1 entity to track

#

if its coming up without components something is wrong

odd bay May 19, 2019, 7:21 PM

#

@safe lintel thanks, adding in those readonlys fixed it

golden heron May 19, 2019, 7:22 PM

#

Anyways, ima post my system...

#

dammit... too long hehe

#

https://pastebin.com/uGx0Gzzq

Pastebin

[C#] public class RotationSpeedSystem : JobComponentSystem { ...

#

I know the basic comparing isnt the best idea, at the moment, its the order of rotations and stuff, once i get the numbers kinda ticking over, ill be able to make the numbers better.

#

(Only the portion inside the "chunk.Has(InSystemTag)" part matters, the others are under different constraints and thats working fine.

tawdry tree May 19, 2019, 7:28 PM

#

If I understand correctly, this:

//Component
public struct MyComponent : IComponentData {
  public int Number;
}

//Proxy
public class MonoBehaviourMyComponentProxy : MonoBehaviour, IConvertGameObjectToEntity {
  public int Number = 1;
  
  public void Convert(Entity entity, EntityManager em, GameObjectConversionSystem convSystem){
    var myComp = new MyComponent { Number = Number };
    em.AddComponentData(entity, myComp);
  }
}

//System
public class MyComponentSystem : ComponentSystem {
    Entities.ForEach((ref MyComponent myComp) => {
    if (myComp.Number != 0){
      Debug.Log("Number is "+myComp.Number);
      myComp.Number = 0;
    }
  });
}

Should be a minimal working example if you add the monobehaviour to a gameobject

golden heron May 19, 2019, 7:28 PM

#

Nice example :)

tawdry tree May 19, 2019, 7:29 PM

#

I just grabbed the stuff from the ECS example and stripped it down the what you see (and changed the logic because we don't need spinning cubes, just to know that the conversion works)

golden heron May 19, 2019, 7:30 PM

#

yep, duz wot it sez on da tin

tawdry tree May 19, 2019, 7:30 PM

#

aii, yu got da dakka?

safe lintel May 19, 2019, 7:31 PM

#

waaaghh!

golden heron May 19, 2019, 7:31 PM

#

Hehe yeah, paint it red, cos red makes it go fasta!

#

And, apparently, to a lesser degree, yellow is good for planes, cos it makes them lighter heheheh

safe lintel May 19, 2019, 7:32 PM

#

i was wondering, did you play eve online? with your universe sim project seems like it could be an appropriate case study

golden heron May 19, 2019, 7:32 PM

#

No, my inspirations come from the dim dawn of dos-time.

#

Ever wondered what it would be like to fly one of the ships from master of orion in the midst of that complex war of races? To play a fully 3d and immersive environment like star control's mineral scavenging and political engagement? Or maybe to have ships as modular in design as those from ascendancy, yet, pilotable, with the body of the ship itself being customisable to your preferences, and affecting the overall balance of the ship in flight...

#

All games from before 1995, some before 1990, and add to that a universe which has an economic behaviour built up from moving ships attached to factories with which the players can interact, affecting economic balance.

tawdry tree May 19, 2019, 7:36 PM

#

Ever heard about something like that and saluted whatever madman thought they could actually implement something that ambitious, while thinking to yourself they're gonna fail?

golden heron May 19, 2019, 7:37 PM

#

Well, there is a principle i hold to.

#

The person designing the website caught hold of it ways back, and added it to the prototype for fun.

#

"If you stop to think about whether or not you can, you have already failed."

#

As a point of reference, i already have several people eager as testers and helpers, and ive already built a single player universe. In monobehaviours tho.

tawdry tree May 19, 2019, 7:39 PM

#

Hah. But you should stop and ask if you can (or should) do it - is this something you're willing to spend however much resources it will take to do?

golden heron May 19, 2019, 7:39 PM

#

I had a 2000 system universe generated procedurally and explorable.

#

I'll do whatever it takes.

#

The aim is get a prototype up and running, then i can think about funding,

safe lintel May 19, 2019, 7:40 PM

#

and here I am just trying to make an fps to the level of quake 🤷

golden heron May 19, 2019, 7:40 PM

#

Hehe

tawdry tree May 19, 2019, 7:40 PM

#

To be clear, I'm not saying that you shouldn't have ambitions, but one should not go into something like that and just assume they can finish it, especially not easily.

golden heron May 19, 2019, 7:40 PM

#

Oh, i never said anything about "easy".

#

Ive also had said static universe running on a very basic multiplayer setup with handbuilt server logins and transform translations.

#

All i need is the entity system to stop being a bitch :D

#

(Excuse my language.)

#

(And, dont think i am taking offence, not at all :) )

#

I try to never take offence.

#

Thats how the livestock escape.

tawdry tree May 19, 2019, 7:43 PM

#

Even just design work can be massive for something like that.
As an example, take just the [the] body of the ship itself [is] customisable to your preferences, and affecting the overall balance of the ship in flight point.
How does ship shape affect flight characteristics? Do you lean towards lesser or greater effects? do you use classes (scout, fighter, heavy fighter, frigate, etc) depending on size and have variations within that, or is everything on giant sliding sclels? diminishing returns? what about balance? What about aesthetics? What about fun?

golden heron May 19, 2019, 7:43 PM

#

Already done :)

tawdry tree May 19, 2019, 7:43 PM

#

And it's not good to be paralyzed by the scope either

safe gate May 19, 2019, 7:43 PM

#

@safe lintel Changing to Convert and Injet the Light stays in place and light things up. But how can I move it? Changing its translation did not work

golden heron May 19, 2019, 7:44 PM

#

I have a working ship editor which can devise the average weight balance on each axis, and enable players to drag and drop or access direct transform numbers for the ship designs.

safe gate May 19, 2019, 7:44 PM

#

public class LightSystem : JobComponentSystem
{
    [BurstCompile]
    [RequireComponentTag(typeof(LightTag))]
    private struct LightJob : IJobForEach<Translation>
    {
        public float3 PlayerTranslation;

        public void Execute(ref Translation translation)
        {
            translation.Value = PlayerTranslation;
        }
    }

    protected override JobHandle OnUpdate(JobHandle inputDependencies)
    {
        Entity playerEntity = GetEntityQuery(typeof(PlayerTag)).GetSingletonEntity();
        var playerTranslation = EntityManager.GetComponentData<Translation>(playerEntity);

        var job = new LightJob
        {
            PlayerTranslation = playerTranslation.Value
        };

        return job.Schedule(this, inputDependencies);
    }
}

golden heron May 19, 2019, 7:44 PM

#

It even recentres the ships object placements so that the origin is also the centre of gravity.

safe gate May 19, 2019, 7:45 PM

#

I am doing this currently

safe lintel May 19, 2019, 7:45 PM

#

you might need a CopyTransformToGameObject component on the light entity

#

if you want it to follow the entity

safe gate May 19, 2019, 7:46 PM

#

I addedd CopyTransformToGameObject and this popped

📎 unknown.png

safe lintel May 19, 2019, 7:46 PM

#

if you are using conversion you need to add it via script

safe gate May 19, 2019, 7:48 PM

#

Oh, not using proxy then

#

IT WORKS!

#

Thanks so f**** much

golden heron May 19, 2019, 7:49 PM

#

Hehehe :)

safe gate May 19, 2019, 7:50 PM

#

I finnaly undertood what you ment the other day about CopyTransform[To/From]Gameobject

safe lintel May 19, 2019, 7:51 PM

#

nyscersul, with your game like what does the player do? like whats a typical gameloop?

golden heron May 19, 2019, 7:52 PM

#

Would anyone be able to basically tell me the order id need to go through with ecs to be able to apply a rotational speed in degrees to an entity's rotation? Specifically, if i take the quaternion, and i want to add say (deltatime*float3(5,3,2)) as a rotation per frame to the quaternion? I think ive gone round in circles too much over the same ground.

odd bay May 19, 2019, 7:52 PM

#

how would I check if an entity already has a component, I'm trying to prevent my system from adding a specific component multiple times which causes it to throw an error

golden heron May 19, 2019, 7:52 PM

#

Do you mean what is the gameplay?

tawdry tree May 19, 2019, 7:53 PM

#

Sounds like it would primarily be like Elite and others 'fly around in a spaceship and fight/mine/trade/whatever'

golden heron May 19, 2019, 7:53 PM

#

kinda yeah, an open world mmo with some form of mission system (i have ideas of what) but generally combat/trade/manufacturing/mining gameplay as per player preference.

safe lintel May 19, 2019, 7:54 PM

#

yeah was wondering how you structure a potential universe for interaction and progression and perhaps(or not) an ending

tawdry tree May 19, 2019, 7:54 PM

#

Those are hard to make interesting. And then there's that whole 'mmo' point

golden heron May 19, 2019, 7:55 PM

#

Well, suffice to say, i have some interesting ideas pertaining to universe dynamics beyond the simple economic model idea.

#

A core feature will be all of those dynamics will be affectable by players.

tawdry tree May 19, 2019, 7:56 PM

#

@odd bay You can use a query to check for WithNone<Component>
Entities.WithNone<YourComponent>().ForEach

golden heron May 19, 2019, 7:56 PM

#

initial gameplay will be, i guess, level up, get better ships, rep;ayability will come from manipulating the universe.

safe lintel May 19, 2019, 7:56 PM

#

@odd bay ComponentDataFromEntity

ActorData = GetComponentDataFromEntity<ActorData>()
ComponentDataFromEntity<Actor> ActorData;
if(ActorData.Exists(entity))
   //stuff

tawdry tree May 19, 2019, 7:56 PM

#

That said, if you make the combat satisfying that might be able to stand on its own, possibly as an arena fighter game

#

Having one really solid system can drive others

odd bay May 19, 2019, 7:57 PM

#

@safe lintel what namespace is that under

golden heron May 19, 2019, 7:57 PM

#

Yep, im hoping to satisfy those desires too, but im under no illusions as to how challenging a realtime space battle can be to implement over the internet.

safe lintel May 19, 2019, 7:57 PM

#

or yeah you could structure your initial query to not have the components that you are adding

#

its a method from the job/componentsystem

safe gate May 19, 2019, 7:58 PM

#

[BurstCompile]
    private struct RotateTowardsPlayerJob : IJobForEach<RotateTowardsPlayer, Translation, Rotation>
    {
        public float DeltaTime;
        public float3 PlayerPosition;

        public void Execute([ReadOnly] ref RotateTowardsPlayer rotateTowardsPlayer, [ReadOnly] ref Translation translation, ref Rotation rotation)
        {
            float3 direction = math.normalize(PlayerPosition - translation.Value).ZeroY();

            quaternion lookRotation = quaternion.LookRotation(direction, math.up());

            rotation.Value = math.nlerp(rotation.Value, lookRotation, DeltaTime * rotateTowardsPlayer.RadiansPerSecond);
        }
    }

#

@golden heron this is how I'm rotating

golden heron May 19, 2019, 7:59 PM

#

i need to keep away from look rotation as i need to construct the final turn not from the direction of the target but from the momentum of the built up speed

odd bay May 19, 2019, 7:59 PM

#

I need to get the component data from the entity in the job

safe lintel May 19, 2019, 7:59 PM

#

you can pass it into your job

golden heron May 19, 2019, 7:59 PM

#

(Plus, im using that for the background entities fine :) )

odd bay May 19, 2019, 8:00 PM

#

I do the raycast in the job which gets the entity, then I modify the components of that entity

golden heron May 19, 2019, 8:01 PM

#

Maybe a better question is, if i take a quaternion, and apply a frames worth of velocity in one axis, then another, then the third, i know id need to knoe the correct order, but would this be an acceptable method to apply rotational speeds?

odd bay May 19, 2019, 8:01 PM

#

I don't think I can pass it in unless I create another component which holds the entity, then in another system I modify that entity

safe gate May 19, 2019, 8:01 PM

#

If you change the axis of the euler angles, I think there is no problem

#

Dont mess directly with quaterions haha

#

Its ugly

golden heron May 19, 2019, 8:03 PM

#

Ive been looking into the math, and hopefully soon itll sink in proper, but its not a quick thing to learn.

safe lintel May 19, 2019, 8:03 PM

#

you can definitely use ComponentDataFromEntity in jobs, ive been using it a lot lately, not sure how efficient it is but its very useful

odd bay May 19, 2019, 8:04 PM

#

wtf

#

before intellisense wasn't showing it

golden heron May 19, 2019, 8:04 PM

#

For now, i can keep track of acceleration values in sensible ways, and i just cant seem to get the rotations to work... Hmmm... Im juat gonna go bash my head against the computer for a bit, wish me luck!

odd bay May 19, 2019, 8:04 PM

#

but the second you sent that message now it's showing

safe gate May 19, 2019, 8:07 PM

#

@golden heron if you transform the rotation to euler, apply the rotation speed and transform that euler back to a quaterion, there should be no problems

golden heron May 19, 2019, 8:09 PM

#

i tried that, didnt work tho

#

i even broke it down into vectors for each axis

#

var local = chunkLocals[i];
var mover = chunkMovers[i];
quaternion rotation = chunkRotations[i].Value; // current Rotation
quaternion newRotation = quaternion.LookRotation(rotationSpeed.directionToDestination, 
        math.up());

float3 rotationDir = MathHelpers.float3Math.TranslationByQuat(new float3(0, 0, 1), 
        rotation);
float3 newRotationDir = rotationSpeed.directionToDestination;
                      
float yAngle = MathHelpers.float3Math.AngleBetween
          (new float3(rotationDir.x, 0, rotationDir.z),
          new float3(newRotationDir.x, 0, newRotationDir.z));
float xAngle = MathHelpers.float3Math.AngleBetween
         (new float3(0, rotationDir.y, rotationDir.z),
         new float3(0, newRotationDir.y, newRotationDir.z));
float zAngle = MathHelpers.float3Math.AngleBetween
        (new float3(rotationDir.x, rotationDir.y, 0),
        new float3(newRotationDir.x, newRotationDir.y, 0));

safe gate May 19, 2019, 8:11 PM

#

What behaviour are you trying to accomplish?

golden heron May 19, 2019, 8:13 PM

#

i am tracking a rotation speed as a speed in three seperate dimensions, then want to apply the increment of the speed per frame

#

the code above is how i got my angles for each axis independently

safe gate May 19, 2019, 8:15 PM

#

The rotation speed is a float?

golden heron May 19, 2019, 8:15 PM

#

if i could simply achieve, "rotate by x degrees, then y degrees, then z degrees" or whatever the order should be, id be sorted

#

rotationspeed is a component

#

in here, it uses a vector (direction to destination)

safe gate May 19, 2019, 8:16 PM

#

I mean, how do you know how much you want the rotation to rotate?

golden heron May 19, 2019, 8:17 PM

#

by seperate methods - thats not the issue. The ship applies a small amount of thrust in the direction of the object on each axis, limited by weight distribution and such, and so each axis may have a different speed

safe gate May 19, 2019, 8:18 PM

#

Ok, so you have a float3 that represents how much each axis has to spin

golden heron May 19, 2019, 8:18 PM

#

the vector that it reads here is used to move towards the object in the move system fine, and also to turn via quaternion.lookrotation

#

exactly

#

rotationSpeed.rotationalVelocity

#

this is part of the issue tho, the system takes the vector which i know is correct, i know my methods of applying the accumulated speeds are correct, im just not getting the right turns. So, i think its how im applying the degrees per second style turning

safe gate May 19, 2019, 8:20 PM

#

try this

float3 velocity;
quaternion currentRotation;
quaternion desiredRotation = currentRotation * math.quaternion(velocity);
currentRotation = math.nlerp(currentRotation, desiredRotation, DeltaTime);

golden heron May 19, 2019, 8:20 PM

#

or possibly a local/world coordinates thing?

#

ill try it but i think ive tried that already. I could be wrong tho

#

arent you supposed to multiply the intended turn by the current rotation, due to the non-commutative nature?

tawdry tree May 19, 2019, 8:24 PM

#

Hmm, you could write a unit test for your rotation system, though that wouldn't really fix the problem. I'd run the code you use to rotate in a minimal environment to first check if it worked to, say, rotate 90 degrees along just one axis, and then increase complexity and see where it breaks

safe gate May 19, 2019, 8:25 PM

#

I did not understand what you meant by multiplying

golden heron May 19, 2019, 8:25 PM

#

math.quaternion(velocity)

#

this isnt workign moans about it needing a float4

safe gate May 19, 2019, 8:25 PM

#

Im converting the float3 you already have to a quaterion

golden heron May 19, 2019, 8:26 PM

#

the desired rotation is the result of a quaternion multiplication.

#

quaternion desiredRotation = currentRotation * math.quaternion(velocity);

#

quaternion = quaternion * quaternionFrom(vector3)

#

im fairly sure that you should multiply the intended change to the current rotation, by the current rotation

#

currentRotation * rotationChange != rotationChange * currentRotation

safe gate May 19, 2019, 8:29 PM

#

Well, I wrote the code without trying it out 😰

golden heron May 19, 2019, 8:30 PM

#

no worries im debugging

#

im... also modifying

#

 quaternion desiredRotation = math.mul(currentRotation, MathHelpers.quaternionMath.CreateFromYawPitchRoll(yAngle, xAngle, zAngle));

#

oops

safe gate May 19, 2019, 8:32 PM

#

What is that MathHelpers?

#

I mean, where did you got it?

golden heron May 19, 2019, 8:35 PM

#

i wrote it, using a port of the system.numerics class source code to use float3 and quaternion from unity.mathematics

#

im getting more NaNs than a garden centre on a weekday.

glad solar May 19, 2019, 8:57 PM

#

\o/ I made it. at long last. finally.

#

thanks everyone who helped me!

dull copper May 19, 2019, 11:31 PM

#

Joachim wrote this about DOTS physics yesterday: Generally lots of threading changes are incoming soon. We did a big pass and removed every single syncpoint. It's quite awesome to see physics run and only when the objects get rendered does it have to complete the physics jobs on main thread...

#

seems like the assumption is that a lot of physics do run for visual purposes only

#

when you do physics based game however, most of your physics code depends on the last physics states where only things you couldn't care that much about is some purely visual thing

#

of course that comment doesn't rule out running custom physics logic on jobs, but curious what this all means

#

after all so far, Unity's jobified tasks have always needed to be completed on main thread so this brings up questions like do they have separate threading on physics in the future etc

#

but yeah, time will definitely tell this (once we get the changes)

safe lintel May 20, 2019, 12:51 AM

#

yeah i saw that, neat but at the same time I want to know more

safe lintel May 20, 2019, 1:15 AM

#

i would like another roadmap update or some sort of blog like state of ecs update that gives their thoughts how things are progressing, what their thoughts are with how users are using it

odd bay May 20, 2019, 1:29 AM

#

well how many users are really using ECS? I don't think there is that many yet

safe lintel May 20, 2019, 1:31 AM

#

i have to imagine that they have internal teams as well as contact with people/companies outside of the forums also using it

low tangle May 20, 2019, 2:10 AM

#

that means they took out the handful of sync points they had for physics, there still one at the end of the frame though @dull copper

#

its a very good thing, it means physics is almost fully parallel

dull copper May 20, 2019, 2:16 AM

#

@low tangle It's quite awesome to see physics run and only when the objects get rendered does it have to complete the physics jobs on main thread suggests they don't sync to main thread for anything but that needs to get rendered, this isn't possible with job system atm at all as new jobs need to be started and completed from main thread

#

it also brings up questions where the custom physics sync to all this

#

but yeah, we can only speculate at this point as that comment is not really telling what they did there

low tangle May 20, 2019, 2:18 AM

#

complete the physics jobs on main thread

#

those jobs are the actual work that needs sync'd

dull copper May 20, 2019, 2:18 AM

#

ah, right

low tangle May 20, 2019, 2:19 AM

#

they had the physics system super messy on first release

dull copper May 20, 2019, 2:19 AM

#

so that just means they can now chain physics jobs properly

low tangle May 20, 2019, 2:19 AM

#

it had lots of systems that started jobs, ran them, completed them

#

then started more

#

instead of a good setup where it kicked off a job and exited without waiting for the job

dull copper May 20, 2019, 2:19 AM

#

I hope this doesn't mean they had to get rid of some of the callbacks

#

because it was awesome that they exposed so many stages

low tangle May 20, 2019, 2:20 AM

#

likely it means they refractored it like the first version of the transform system

#

first one was super slow, and had lots of internal completes

#

new one has a much better flow that syncs at really nice spots giving much better performance

dull copper May 20, 2019, 2:20 AM

#

I still don't get the transform job concept

#

I don't see Unity itself using it on any samples

#

(does it even exist anymore?)

low tangle May 20, 2019, 2:21 AM

#

do you mean IJobParallelForTransform?

dull copper May 20, 2019, 2:21 AM

#

yeah

low tangle May 20, 2019, 2:21 AM

#

thats a hybrid job

#

its used to loop though transforms from main unity thread, on job threads

#

using pointers internally

#

its unsafe to touch main thread transforms from job threads without

dull copper May 20, 2019, 2:22 AM

#

every time I see Unity needing to do tranform updates, they just seem to use normal job with translation and rotation separately

low tangle May 20, 2019, 2:22 AM

#

yeah thats the dots transform system

#

its not the same as the main thread transform

#

it shouldn't even be called a system

#

that job is for old transforms

#

monobehavour ones

dull copper May 20, 2019, 2:23 AM

#

oh right, I think I get it

low tangle May 20, 2019, 2:23 AM

#

new transforms are localtoworld+translation+etc

#

two seperate types of transforms

dull copper May 20, 2019, 2:24 AM

#

I never really bothered to check the transform job as Unity didn't seem to use it, never paid attention why it was so

#

but that explains it, thanks 😄

low tangle May 20, 2019, 2:24 AM

#

np

#

its used for the older proxy system copy to gameobject

#

which is a hybrid bandaid to get transforms to/from ecs transforms

dull copper May 20, 2019, 2:25 AM

#

well, I have a use case for updating transforms to the old side, so I may still need to check that one out

low tangle May 20, 2019, 2:25 AM

#

I've got some code I could probally share actually

#

I cloned their systems and made my own components so I could control exactly how it updates

dull copper May 20, 2019, 2:27 AM

#

I hope they get the physics updates figured sooner than later

#

I need to hack that anyway but would be easier if their things wouldn't move around that much

low tangle May 20, 2019, 2:28 AM

#

I wish the timeline wasn't so dang long at the moment for full dotsifcation of the engine sleep

#

I wanna port everything to ecs

dull copper May 20, 2019, 2:28 AM

#

it's fine IMO, at least they are realistic about it

low tangle May 20, 2019, 2:28 AM

#

every legacy system feels like muck

dull copper May 20, 2019, 2:28 AM

#

but I'd REALLY want to get full ECS editor sooner than later

low tangle May 20, 2019, 2:28 AM

#

yeah def

safe lintel May 20, 2019, 2:28 AM

#

it feels wrong to mix legacy with hybrid 😦

dull copper May 20, 2019, 2:28 AM

#

it's what's dragging whole DOTS behind right now

low tangle May 20, 2019, 2:29 AM

#

really does

safe lintel May 20, 2019, 2:29 AM

#

i mean legacy with dots

low tangle May 20, 2019, 2:29 AM

#

but I have no choice with stuff like leap motion

dull copper May 20, 2019, 2:29 AM

#

whole conversion stuff is making DOTS less appealing

#

it's so hacky

safe lintel May 20, 2019, 2:29 AM

#

same with animation

low tangle May 20, 2019, 2:29 AM

#

I dont have enough time to rewrite their entire api to ecs

#

so I have to make a bridge

#

yeah the conversion api is really pain in the ass right now

#

but I think its going to be less needed soon

dull copper May 20, 2019, 2:30 AM

#

I'd love to see roadmap update from Unite Sydney that was last week

#

they didn't mention any target for DOTS editor at GDC

#

in fact they barely mentioned it

low tangle May 20, 2019, 2:31 AM

#

https://www.youtube.com/watch?v=nqVhQIJsoe0

YouTube

Adam Goodrich

Procedural Worlds - Unite Sydney Keynote, May 2019

We were excited and humbled to be given the opportunity by Unity to speak as part of their keynote at Unite Sydney in May 2019! It is a great example of how ...

▶ Play video

#

first google hit from it

dull copper May 20, 2019, 2:31 AM

#

yeah, that's only procedural worlds part from keynote

#

saw that earlier but haven't seen any other material

safe lintel May 20, 2019, 2:31 AM

#

didnt even know there was a unite sydney

dull copper May 20, 2019, 2:31 AM

#

there's also keynote of Unite Shanghai on the web that happened few days before Unite Sydney

safe lintel May 20, 2019, 2:32 AM

#

or shanghai 😄

dull copper May 20, 2019, 2:32 AM

#

I couldn't understand half of it for obvious reasons

safe lintel May 20, 2019, 2:32 AM

#

kinda thinking not much new dots stuff was really discussed though

dull copper May 20, 2019, 2:32 AM

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but was still fun to see how they market Unity differently that side of the world

low tangle May 20, 2019, 2:33 AM

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for sure

dull copper May 20, 2019, 2:33 AM

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yeah, Riccitello said DOTS etc lets people to assemble engine like they want 😄

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it was nicely twisted IMO

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as right now you kinda have to assemble it

low tangle May 20, 2019, 2:33 AM

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well it does?

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I've got a little toy game where I disabled all of the unity renderes and run my own path tracer renderer

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it renders data from the ecs scene

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:^)

dull copper May 20, 2019, 2:34 AM

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yeah but I mean, while it's nice that you can take parts you want, right now it's so early that you have no other option that pick old systems that work and mix with new things if you are brave enough

low tangle May 20, 2019, 2:34 AM

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yeah for sure its still like 50% of what you need

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other half you gotta really do yourself

dull copper May 20, 2019, 2:35 AM

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don't get me wrong, DOTS, packages and SRPs are biggest improvement to Unity IMHO in years

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they all bring more power to devs

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more source access

low tangle May 20, 2019, 2:35 AM

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massive improvement, I was moving to unreal before it all started

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but this turned out to be a fresh breath of air for dev in general, and its such a nicely packaged ecs bundle, and the performance is just there

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faster then ue4 by a long shot