#archived-dots | Official Unity Discord | Page 207

bright sentinel Mar 16, 2021, 11:32 PM

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Good question

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I think no

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https://docs.unity3d.com/ScriptReference/PlayerSettings.SetScriptingDefineSymbolsForGroup.html

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No

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Should be fine

fluid kiln Mar 16, 2021, 11:34 PM

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Definitely a false positive then

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My client build doesn't seem to be working much on the networking side tho

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Wass I missing any components in the build conf above?

bright sentinel Mar 16, 2021, 11:35 PM

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Can you connect locally in the editor?

fluid kiln Mar 16, 2021, 11:35 PM

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Yup

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I'll try the scripting define

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UNITY_CLIENT

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Well no it's already there

bright sentinel Mar 16, 2021, 11:35 PM

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How does your connection script look like?

fluid kiln Mar 16, 2021, 11:36 PM

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        {
            ecb.AddComponent<NetworkStreamInGame>(ent);

            var req = ecb.CreateEntity();
            ecb.AddComponent<GoInGameRequest>(req);
            ecb.AddComponent(req, new SendRpcCommandRequestComponent { TargetConnection = ent });
        }).Schedule();```

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        var playerPrefab = GetSingleton<PlayerPrefab>().entity;

        Entities.WithNone<SendRpcCommandRequestComponent>().ForEach((Entity reqEnt, ref GoInGameRequest req, ref ReceiveRpcCommandRequestComponent reqSrc) =>
        {
            ecb.AddComponent<NetworkStreamInGame>(reqSrc.SourceConnection);

            int networkId = GetComponent<NetworkIdComponent>(reqSrc.SourceConnection).Value;

            var player = ecb.Instantiate(playerPrefab);
            ecb.AddComponent(player, new GhostOwnerComponent() { NetworkId = networkId });
            ecb.AddBuffer<PlayerInput>(player);

            ecb.SetComponent(reqSrc.SourceConnection, new CommandTargetComponent { targetEntity = player });

            ecb.DestroyEntity(reqEnt);
        }).Schedule();```

bright sentinel Mar 16, 2021, 11:37 PM

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That's not your connection script, all that happens after you have connected.

fluid kiln Mar 16, 2021, 11:37 PM

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Oh gotcha

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Server side?

bright sentinel Mar 16, 2021, 11:37 PM

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Both 🙂

fluid kiln Mar 16, 2021, 11:38 PM

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    {
        EntityManager.DestroyEntity(initEntity);

        foreach (var world in World.All)
        {
            var network = world.GetExistingSystem<NetworkStreamReceiveSystem>();
            if (world.GetExistingSystem<ClientSimulationSystemGroup>() != null)
            {
                // Client worlds automatically connect to localhost
                NetworkEndPoint ep = NetworkEndPoint.LoopbackIpv4;
                ep.Port = 7979;
                network.Connect(ep);
            }
#if UNITY_EDITOR
            else if (world.GetExistingSystem<ServerSimulationSystemGroup>() != null)
            {
                // Server world automatically listens for connections from any host
                NetworkEndPoint ep = NetworkEndPoint.AnyIpv4;
                ep.Port = 7979;
                network.Listen(ep);
            }
#endif
        }
    }```

bright sentinel Mar 16, 2021, 11:39 PM

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Hmm, that should be fine. In fact, even if your build doesn't have the UNITY_CLIENT define, it should still only work as a client

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Because of the #if UNITY_EDITOR

fluid kiln Mar 16, 2021, 11:39 PM

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Yeah exactly, I see my player prefab is instantiated on the server, but nothing is moving on the build client

bright sentinel Mar 16, 2021, 11:40 PM

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Is there only the one prefab on the server?

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Or are there 2, with one not moving?

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player*, not prefab

fluid kiln Mar 16, 2021, 11:41 PM

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I run the editor client/server, there I'm able to move my player, once the build connects as the second client, he sees nothing moving, but his prefab is instantiated on both the first client and server

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Okay it works, but only when the build client is launched first

bright sentinel Mar 16, 2021, 11:41 PM

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Oh, I see. Does the build also see its own player? Even if it's not moving?

fluid kiln Mar 16, 2021, 11:42 PM

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Not initially no

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It seems to work now (?) but very unstable

bright sentinel Mar 16, 2021, 11:42 PM

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What do you mean by "initially"?

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Either way, the connection is not an issue then. I think the issue more lies with your movement code

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Kinda sounds like you are moving more than the clients own player on each client

fluid kiln Mar 16, 2021, 11:43 PM

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It's very smooth on the editor, less so in the build

bright sentinel Mar 16, 2021, 11:44 PM

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How does your movement script look like?

fluid kiln Mar 16, 2021, 11:44 PM

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I think it's fine it seems to be smooth now, is it normal if there's like a warmup time? I,ll try restrating and see if it's not smooth again

bright sentinel Mar 16, 2021, 11:45 PM

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Definitely not normal

fluid kiln Mar 16, 2021, 11:45 PM

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My movement is pretty standard

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So it's definitely problematic that the build only works if it's launched first

bright sentinel Mar 16, 2021, 11:46 PM

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Yeah, I'm guessing it's something related to how you move your players

fluid kiln Mar 16, 2021, 11:46 PM

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I can show but there's a few systems involved

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This is the gist of it ``` var deltaTime = Time.DeltaTime;
var tick = gpsg.PredictingTick;

    Entities.WithNone<Stopped>().ForEach((Entity ent, ref Translation translation, ref Direction direction, in PredictedGhostComponent prediction, in Destination destination, in Stats stats) =>
    {
        if (!GhostPredictionSystemGroup.ShouldPredict(tick, prediction))
            return;

        var deltaToTarget = destination.value - translation.Value;
        var remainingDistance = math.length(deltaToTarget);
        var directionToTarget = math.normalize(deltaToTarget);
        var travel = GetComponent<Current>(stats.speed).Value * deltaTime;

        if (remainingDistance <= travel)
        {
            translation.Value += deltaToTarget;
            direction.Value = directionToTarget;
            ecb.AddComponent<Stopped>(ent);
        } else
        {
            translation.Value += directionToTarget * travel;
            direction.Value = directionToTarget;
        }
    }).Schedule();```

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Direciton is set through input

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It's click to move

bright sentinel Mar 16, 2021, 11:48 PM

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What about the CommandTargetComponent, where do you handle that on the client?

fluid kiln Mar 16, 2021, 11:49 PM

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I have a LocalPlayerInitializerSystem

bright sentinel Mar 16, 2021, 11:49 PM

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Can I see it? 😄

fluid kiln Mar 16, 2021, 11:49 PM

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        Entity lookingForLocalPlayerEntity = GetSingletonEntity<LookingForLocalPlayer>();
        Entity connection = GetSingletonEntity<CommandTargetComponent>();
        Entity camera = GetSingletonEntity<Camera>();

        Entities.ForEach((Entity localPlayer, ref GhostOwnerComponent ghost) =>
        {
            if (ghost.NetworkId == localPlayerId)
            {
                //Flag as local player singleton
                ecb.AddComponent<LocalPlayer>(localPlayer);

                //Instantiate input buffer
                ecb.SetComponent(connection, new CommandTargetComponent { targetEntity = localPlayer });
                ecb.AddBuffer<PlayerInput>(localPlayer);

                //Attach camera
                ecb.AddComponent(camera, new Parent() { Value = localPlayer });
                ecb.AddComponent<LocalToWorld>(camera);
                ecb.AddComponent<LocalToParent>(camera);

                //Disable system
                ecb.DestroyEntity(lookingForLocalPlayerEntity);
            }
        }).Schedule();```

bright sentinel Mar 16, 2021, 11:52 PM

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Hmmmm. The only thing that stands out to me is that GhostOwnerComponent is added through scripts instead of added as part of the prefab. That's the biggest difference I can see that I do

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Of course still have to use SetComponent for the NetworkId

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I'm assuming that system also has a RequireSingletonForUpdate<LookingForLocalPlayer>() yes?

fluid kiln Mar 16, 2021, 11:53 PM

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Yeah :p I'll see maybe setting it instead of adding

bright sentinel Mar 16, 2021, 11:53 PM

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How does the prefab look like for the ghost component?

fluid kiln Mar 16, 2021, 11:54 PM

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It HAS ghost owner component.... mmh

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Maybe that's bad practice

bright sentinel Mar 16, 2021, 11:55 PM

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Yeah, then you can just change it to SetComponent, but that should be fine too.. 🤔

fluid kiln Mar 16, 2021, 11:56 PM

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I'll have to continue digging tomorrow, thanks a lot for the help I appreciate it!

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I'll let you guys know what the error was when I figure it out

ocean tundra Mar 17, 2021, 6:24 AM

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What happens if we have a MASSIVE IComponentData? Over the 16kb chunk size

granite spoke Mar 17, 2021, 9:01 AM

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ocean tundra What happens if we have a MASSIVE IComponentData? Over the 16kb chunk size

if it is taht big, best is to store it in a blob asset and reference it from a component. there is no benefit of using that as a component directly. Of course if you can divide it into smaller components, like hell lot smaller.

ocean tundra Mar 17, 2021, 9:01 AM

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Ok but it's proper game data

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Eg voxel data for a chunk

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Obviously have smaller chunk size so it fits but I was wondering what happens if it's too big :p

hollow sorrel Mar 17, 2021, 9:35 AM

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i dont think it lets you

half jay Mar 17, 2021, 9:39 AM

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I have gameobject conversion system which should convert objects during run time

  public class AssetsConversationSystem : GameObjectConversionSystem
    {
        protected override void OnUpdate()
        {           
            Debug.Log("ViewBlobAssetRefStorage = "+ViewStorage.ViewBlobAssetRefStorage.Count());
            
            Entities.ForEach((AssetConverterPrefabReference prefabReference) =>
            {
                var entity = GetPrimaryEntity(prefabReference);

                ViewStorage.ViewBlobAssetRefStorage.Add(prefabReference.ObjectClassId,new ViewObjectItemBlobAsset
                {
                    ViewId = prefabReference.ViewId,
                    Prefab = entity
                });
                
              
            });
        }
    }

but its doesn't execute. First assets bundles downloaded and then AssetConverterPrefabReference attach to dowloaded gameobjects and this systems not execute also i can't see it in Entity Debugger

amber flicker Mar 17, 2021, 9:59 AM

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conversion systems aren't designed to execute at runtime - only edit-time

pulsar jay Mar 17, 2021, 9:59 AM

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half jay I have gameobject conversion system which should convert objects during run time...

I would recommend using IConvertGameObjectToEntity instead of conversion systems. I tried both and IConvertGameObjectToEntity was much more straight forward. Maybe this might solve your problem

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But I think they do convert at runtime as long as you have a ConvertToEntity component attached to it. At least the deafault conversion system should run and execute the IConvertGameObjectToEntity components

half jay Mar 17, 2021, 10:03 AM

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ty. i need something to control conversation because store entities in HashMap and i need place where can i add them

pulsar jay Mar 17, 2021, 10:05 AM

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@half jay what are you trying to achieve as I guess I might be trying sth similar atm?

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I am currently trying to use addressables with entities so they only load and convert once and I can reference them by their address

half jay Mar 17, 2021, 10:13 AM

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Soo we have custom web admin panel where load "Blocks"( our assets) by unique Id. This id used in path of storage on server and also in game logic. Thats why we use AssetsBundles because we need atomic changes of every Block. So during game user can get new Block for him and download (asset during runtime) . Downloaded asset converted to entity prefab and we store it in HashMap by this unique Id(this im trying to solve). And then user place block into scene selecting block from inventory by Id and getting needed asset from HashMap to instantiate View of this block.

pulsar jay Mar 17, 2021, 10:17 AM

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yeah sounds pretty similar to what I am trying to do besides me using addressables

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I use GameObjectConversionUtility.ConvertGameObjectHierarchy to manually convert the entities btw

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Although there was a thread by eizenhorn somewhere that it is better to use a ConvertToEntity componenent as you can potentially convert mutltiple prefabs at once

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GameObjectConversionUtility.ConvertGameObjectHierarchy will setup the whole conversion World etc. for each conversion

half jay Mar 17, 2021, 10:29 AM

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im using now MonoBehaviour and IConvertGameObjectToEntity and in Convert method add entity to HashMap

pulsar jay Mar 17, 2021, 10:29 AM

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ahh found it: #archived-dots message

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but I am currently stuck with using addressables from jobs. As I cannot return AsyncOperationHandles from jobs (even mainthread) as they are not blitable. So I have no clue how to keep a reference to the entity I loaded and instantiated as I cannot get any kind of reference out of a job

half jay Mar 17, 2021, 10:41 AM

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@pulsar jay If we have Addressables something like this. Is it possible to setup every block as single asset with its own URL and in future update only one of them. I mean build only one of them and then upload addresable file into server with its unique url where Id will be include also in game logic and forming this url.

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we use assets bundles now because its proven way

pulsar jay Mar 17, 2021, 10:45 AM

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Yeah thats what addressables are built for. Although they usually use one AssetBundle for mutliple assets (You can patch them if only some assets change) and addressables know which bundles / dependencies need to be downloaded in order to provide that asset

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Yeah could be simpler to just use asset bundles in your case

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Addressables just add an extra layer of abstraction/indirection

half jay Mar 17, 2021, 10:46 AM

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problem that i read documentation and didn't find info how to properly setup it. So also our problem that it will be thousands of blocks in theory

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may be i need to read docs one more time 😆

pulsar jay Mar 17, 2021, 10:49 AM

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I also have another project where I used plain asset bundles because I didnt take the time to read the whole addressables docs

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Now that I basically recreated editor asset bundle simulation thing addressables is using I wonder if it might have been a better idea to use addressables from the start

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But I think both is a pain to get to work properly with entities because there is no official proper way to handle prefabs

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would be great if you could just build convert to entities at edit time and put the result in asset bundles

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which should theoretically be possible

pulsar jay Mar 17, 2021, 11:32 AM

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I just encountered a problem where my Entities spawned with EntityManager.Instantiate just dont exist. Did this ever happen to anybody?

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I even checked in the debugger that it is being created but it does not show up in the entities window or entity debugger

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Maybe it has sth to do with calling it from a lambda callback?

AddressableEntities.LoadEntityAsync(address.ToString()).Completed += handle =>
{
    var instance = EntityManager.Instantiate(handle.Result);
...```

rigid gust Mar 17, 2021, 11:34 AM

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hello I need help on unity I do not understand where to download the engine itself

pulsar jay Mar 17, 2021, 11:35 AM

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rigid gust hello I need help on unity I do not understand where to download the engine itse...

Thats the wrong channel then. Please try #💻┃unity-talk

hollow sorrel Mar 17, 2021, 11:57 AM

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am trying to implement some custom networking atm
does it make sense to make all packets structs? would save not having to pool anything but I don't know how to deal with optional data
serializing/deserializing wise I check bitflags whether it has that data and that all works, but I mean for game logic with classes I'd just check != null if it has that, but with value types can't really do that
also these packets would be used outside ECS too so can't just 'not add component'

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wonder how dots networking handles it, haven't used it yet

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@trail burrow tagging because you know a lot about networking and also can't dm you

trail burrow Mar 17, 2021, 11:59 AM

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lol

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if u doing dots ur on ur own 😄

hollow sorrel Mar 17, 2021, 11:59 AM

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nono

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this is outside dots, I just don't know where else to ask 😅

trail burrow Mar 17, 2021, 12:00 PM

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¯_(ツ)_/¯

bright sentinel Mar 17, 2021, 12:20 PM

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hollow sorrel this is outside dots, I just don't know where else to ask 😅

There's a #archived-networking channel 😄

hollow sorrel Mar 17, 2021, 12:20 PM

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yea but that might as well be called #photon 👀

bright sentinel Mar 17, 2021, 12:21 PM

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pulsar jay Maybe it has sth to do with calling it from a lambda callback? ```C# Addressable...

My first thought is that you're destroying it somewhere 🤔

bright sentinel Mar 17, 2021, 12:21 PM

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hollow sorrel yea but that might as well be called #photon 👀

True

slim nebula Mar 17, 2021, 12:43 PM

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Unity.netcode uses two main pieces of data for network transfer. There's some other stuff for setup and whatever but I'll skip over those. It uses a command component which you can add to anything and that command will be sent over the network. The other thing it can use is a buffer component where it stores the data for different frames in different indexes of the buffer. So as you're doing prediction you can grab the data from whatever frame you need. @hollow sorrel

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I'm not sure what you'd be checking for null exactly

hollow sorrel Mar 17, 2021, 12:54 PM

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ooo i see

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but what if your command can contain optional things?

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like data that you sometimes wanna send but sometimes don't need to, and is part of the same command

olive kite Mar 17, 2021, 1:11 PM

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When an entity's Rotation.Value is assigned to, does it wait until the TransformSystemGroup to update the related variables such as LocalToWorld?

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Because I am having some issues with setting rotation values. If one system uses LocalToWorld's rotation and translation for its calculations and sets the rotation or position, then another system uses LocalToWorld, wouldn't the second system be using old values?

pulsar jay Mar 17, 2021, 1:32 PM

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bright sentinel My first thought is that you're destroying it somewhere 🤔

Its really just a simple system instancing an entity each frame. I dont destroy them at all 🤔

bright sentinel Mar 17, 2021, 1:36 PM

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hollow sorrel like data that you sometimes wanna send but sometimes don't need to, and is part...

They do delta compression, meaning that they won't send data that hasn't changed.

bright sentinel Mar 17, 2021, 1:36 PM

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pulsar jay Its really just a simple system instancing an entity each frame. I dont destroy ...

I was just thinking that some other system might accidentally delete the entity

pulsar jay Mar 17, 2021, 1:39 PM

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bright sentinel I was just thinking that some other system might accidentally delete the entity

Oh wow you are right there was a cooldown system running somewhere instantly destorying the entities because the cooldown time wasnt set

hollow sorrel Mar 17, 2021, 1:51 PM

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bright sentinel They do delta compression, meaning that they won't send data that hasn't changed...

yea but I mean how do you know what's changed on the client
like if you have a big packet that contains other structs that may or may not be present
NativeArray etc has a .IsCreated you can use, but what about your own structs
thinking of wrapping optional structs in a Nullable<T> maybe

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like maybe you want to send a position as part of another packet but sometimes it won't be present so you don't have to update it

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can't just compare it to default(T) because 0,0,0 might be valid position

bright sentinel Mar 17, 2021, 1:52 PM

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What I usually do with Unity netcode is just get the previous tick and compare it to current tick for any variable

stone osprey Mar 17, 2021, 5:35 PM

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Hmmm... i wanna display a list of recipes to craft items. Each recipe basically only has some sort of visible condition, a craftable condition and some sort of required items and an output. Is it worth to implement this as an entity ?

sturdy rune Mar 17, 2021, 7:24 PM

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wouldn't you just do a recipecrafting system with perhaps some recipedata with all the recipes in it?

bright sentinel Mar 17, 2021, 7:28 PM

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stone osprey Hmmm... i wanna display a list of recipes to craft items. Each recipe basically ...

If the rest of your game is in ECS, then yes. All you need to do is bring that data to the UI (which currently isn't DOTS yet)

stone osprey Mar 17, 2021, 7:41 PM

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@sturdy rune Well there many ways ^^ @bright sentinel Hmmm... thats right, i actually try not to overuse the ECS architecture. Not everything should be an entity, when there simpler solutions... The problem is that im always undecided between ECS and OOP

bright sentinel Mar 17, 2021, 7:45 PM

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stone osprey <@!232025684967555072> Well there many ways ^^ <@!107870625674055680> Hmmm... th...

Specifically for an inventory system in a singleplayer game, I think you'd be better off creating that in OOP. There will only ever be one of them, so having it multithreaded will not really give you any benefit. OOP can also be a bit easier so you can use inheritance, which is really useful for item types. Of course you could also do this through composition with both ECS and OOP, it's just whatever you like the most.

sturdy rune Mar 17, 2021, 7:52 PM

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True - I guess my idea of crafting is Factorio which suffers at cpu level haha

ocean tundra Mar 17, 2021, 8:08 PM

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@pulsar jay have you tried loading subscenes from addressables?
Is that even possible yet?

bright sentinel Mar 17, 2021, 8:16 PM

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sturdy rune True - I guess my idea of crafting is Factorio which suffers at cpu level haha

Oh if it's that kind of crafting, definitely go with entities. In fact I think Factorio uses an ECS architecture

stone osprey Mar 17, 2021, 8:29 PM

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Alright thanks ^^ well its actually more the multiplayer kind of crafting 😉 RPG like

fluid kiln Mar 17, 2021, 8:43 PM

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With the new conversion system, in netcode, there's no way to have some entities only on the server or client like before right?

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What should I do with spawner entities that are only used by the server?

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Leave them on the client anyway?

north bay Mar 17, 2021, 9:05 PM

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Could you move them to a subscene that you only load on the server? That's how I handle that.

fluid kiln Mar 17, 2021, 9:07 PM

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Haaa see I knew there was something about that but where do I specifiy which scenes load how? In the build settings...

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🤪

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So like, every level/scene should have 2 or 3 subscenes; client, server, client and server?

north bay Mar 17, 2021, 9:11 PM

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I dont think netcode already has something for that.

One way to archive this is by disabling auto load on the subscene and adding it to a list which you manually load on client/server systems.

fluid kiln Mar 17, 2021, 9:11 PM

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What about the scene list in the build configuration? Since I have a build config for client and server, I can include only the appropriate scenes in each

north bay Mar 17, 2021, 9:12 PM

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Ehhh

fluid kiln Mar 17, 2021, 9:12 PM

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But then I have to do it manually for each scene

north bay Mar 17, 2021, 9:12 PM

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I think you need to create a subscene mono behaviour so the scene is actually built

fluid kiln Mar 17, 2021, 9:13 PM

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Yeah okay I get it

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Thanks 😄

ocean tundra Mar 17, 2021, 9:18 PM

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@fluid kiln I'm not using netcode but building my own that's very similar

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What I do is I have a server/client system that 'strips' off components

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Eg on server I have a system that removes render mesh

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What I would prefer is a way to generate extra subscenes from one, eg your 'main' authoring subscene actually generates 2 subscenes, one for clients and another for servers, but subscenes are a pain to extend atm

fluid kiln Mar 17, 2021, 9:22 PM

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Yeah I liked the old way where I could tag entities as Client, Server or ClientServer and they would be deleted during runtime. I don't feel like doing it myself so I'll probably just wait for a netcode implementation or do what Script said

ocean tundra Mar 17, 2021, 9:23 PM

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Yea that's my plan, a editor tool to mark where the component can exist, atm I just code is all manually

fluid kiln Mar 17, 2021, 9:23 PM

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I think netcode already strip some components like Render Mesh, god I hope so

frosty siren Mar 17, 2021, 10:36 PM

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Guys, can i somehow use companion workflow and avoid terrible execution time of CompanionGameObjectUpdateTransformSystem ?

bright sentinel Mar 17, 2021, 11:02 PM

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Well the whole issue with it is that it can't be bursted or multithreaded, so probably not.

fluid kiln Mar 17, 2021, 11:11 PM

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What's the easiest way to rotate an entity relative to world rather than the parent? I understand I have to use LocalToWorld, but do I really have to reconstruct the TRS matrix?

pulsar jay Mar 17, 2021, 11:27 PM

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ocean tundra <@189441783581638659> have you tried loading subscenes from addressables? Is tha...

No didnt try that yet as we dont really use subscenes atm

frosty siren Mar 17, 2021, 11:56 PM

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Omg, i have looked into CompanionGameObjectUpdateTransformSystem code and now i understand why it is so bad

stone osprey Mar 17, 2021, 11:59 PM

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Soooooo... I have a torch. Theres the stick and the flame both are pure ecs. So we have some sort of hierarchy. The Stick has a parent component pointing to the flame. And the flame points to the stick. The flame depends on the stick. How do we make them communicate ? For example the stick should tell the flame to activate. I read somewhere that we need some sort of message system... and it should be pretty flexible. How would we do that ?

pliant pike Mar 18, 2021, 12:33 AM

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stone osprey Soooooo... I have a torch. Theres the stick and the flame both are pure ecs. So ...

I just use simple event entities, create a singleton entity component to start(the systems have RequireSingletonforupdate<>() and then destroy it when its over

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it works, it doesn't need to be majorly complicated you could have a singelton buffer for queued events

stone osprey Mar 18, 2021, 12:36 AM

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Hmmm... But the event should get passed to all childs. Like those mono behaviours do. Parent sends a message, child receives and does something with it.

Furthermore such a event entity require its own "system" or loop to apply the logic. But theres no safety... Entities.ForEach(EnableFlame flame {}) so every event would require its own system... Is kinda bloated

pliant pike Mar 18, 2021, 12:39 AM

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you have one system though that would receive that message?

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personally I wouldn't think of dots in parents and children, I'd think of it in just the components that you want to calculate on

stone osprey Mar 18, 2021, 12:41 AM

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How would my system receive that message ? By looping over the event ? Or is there some cool new api ?

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Well its not always possible... Imagine a car with weels. 0-n

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Some sort of long car

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Very long

pliant pike Mar 18, 2021, 12:42 AM

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with RequireSingeltonforUpdate<>()

stone osprey Mar 18, 2021, 12:42 AM

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Hmmm... Ok, im gonna search for some examples thanks ^^ and theres no other cool way we could pass those messages between parents and childs ?

pliant pike Mar 18, 2021, 12:43 AM

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wheels only need to be childs with a single component Translation

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I think there is a childcomponent type though

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LocaltoParent might be what you want

void girder Mar 18, 2021, 1:59 AM

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Why doesn't Unity.Mathematics have support for short? Can shorts not be vectorized or something?

olive kite Mar 18, 2021, 2:32 AM

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Anyone know why LocalToParent doesn't have .Rotation like LocalToWorld does?

stable siren Mar 18, 2021, 9:36 AM

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I am calculating statistics and now I want to display them as text. Can I do this with an entity?

pulsar jay Mar 18, 2021, 10:06 AM

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I am currently playing around with NativeQueue as a kind of command buffer.
Is this a bad idea:

public void PlayVFX(VFXCommand command)
{
    var commandWriter = this.Commands.AsParallelWriter();
    commandWriter.Enqueue(command);
}

I guess using this in another Systems ForEach would lead to each iteration creating its own parallel writer,
which is a bad thing I suppose?

pulsar jay Mar 18, 2021, 10:07 AM

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stable siren I am calculating statistics and now I want to display them as text. Can I do thi...

I dont know of any means of displaying text via entities yet. I usually just use regular gameObject UI which pulls data from entities via MonoBehaviours

stable siren Mar 18, 2021, 10:08 AM

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OK thanks 🙂

stable siren Mar 18, 2021, 10:59 AM

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is float3.magnitude a thing? I can't seem to get it working

north bay Mar 18, 2021, 11:05 AM

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math.length

olive kite Mar 18, 2021, 12:30 PM

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Is there a good way to prevent 'Attempt to access invalid address.' when assigning to entities? I do an entity null check but still seems to happen every once in a while.

stable siren Mar 18, 2021, 1:28 PM

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Can anyone see anything wrong with this main thread system? The statistics entity is not being recognised by the system for some reason

#

#

olive kite Mar 18, 2021, 1:33 PM

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are there any other components on that entity?

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oh nvm i see MeanFreePath there

frosty siren Mar 18, 2021, 1:36 PM

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stable siren

are there any entities from "Gather statistical components" query?

stable siren Mar 18, 2021, 1:37 PM

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frosty siren are there any entities from "Gather statistical components" query?

I'm not quite sure what you mean, as in if I do a query does it return the statistics entity?

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The statistics entity works in a test syste,

frosty siren Mar 18, 2021, 1:42 PM

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This is your Atom query. All entities which has Atom, LastFreeTime and LastFreeTime...Twice...? Maybe that is a problem. Entity can only have one component of the same type

zenith wyvern Mar 18, 2021, 1:42 PM

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stable siren I'm not quite sure what you mean, as in if I do a query does it return the stati...

The results of your second job depends on your first. Have you verified your first job is working how you expect?

stable siren Mar 18, 2021, 1:44 PM

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frosty siren This is your Atom query. All entities which has Atom, LastFreeTime and LastFreeT...

oh ahaha thank you

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Ok I think changing the query to the right component fixed it, thanks all.

frosty siren Mar 18, 2021, 1:46 PM

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if you want have multiple values of the same component on entity you can use IBufferElementData which can be accessed by Entities.ForEach(DynamicBuffer<T> buffer)

eager jungle Mar 18, 2021, 2:41 PM

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Hey guys. Just upgraded to latest entities, and it seems that calling Dispose on the DefaultGameObjectInjectionWorld always raises a warning. "Unloading the last loaded scene Assets/TestScenes/Scene1.unity(build index: 6), is not supported. Please use SceneManager.LoadScene()/EditorSceneManager.OpenScene() to switch to another scene."
Do you guys have any info about? What I'm doing is disposing the world in order to do a fresh scene load.

half jay Mar 18, 2021, 4:31 PM

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Where MonoBehaviour are executing in dots update loop? in which system group ?

pulsar jay Mar 18, 2021, 4:48 PM

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half jay Where MonoBehaviour are executing in dots update loop? in which system group ?

AFAIK its independent of the ecs update loop. But you could easily test it with some debug logs in a monobehaviour and some systems

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From the naming I would derive that update happens somwhere around the update group and LateUpdate happens after PreLateUpdate group

half jay Mar 18, 2021, 4:50 PM

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ty, i need control that i do something in ECS world and should show in UI some result which made with MonoBehaviour and want to know how to do it for one frame

pulsar jay Mar 18, 2021, 4:52 PM

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If you use schedule you have to be aware that it does run multithreaded und you cannot be sure from MB when the job is being finished

fluid kiln Mar 18, 2021, 4:52 PM

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Does anyone have a snippet of setting the world rotation of a child object through LocalToWorld?

pulsar jay Mar 18, 2021, 4:53 PM

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I just have the approach that I really dont care if the UI shows this or last frames data

half jay Mar 18, 2021, 4:53 PM

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pulsar jay If you use schedule you have to be aware that it does run multithreaded und you ...

yes but after sync system

pulsar jay Mar 18, 2021, 4:54 PM

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yeah that would work if the MB gets updated after that

fluid kiln Mar 18, 2021, 5:19 PM

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fluid kiln Does anyone have a snippet of setting the world rotation of a child object throu...

Or is there any way to unbind the rotation of a child without unbinding the transform? I thought of removing LocalToParent but that would make it stop following the parent :/

pulsar jay Mar 18, 2021, 5:32 PM

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Is it possible to use NativeQueue.AsParallelWriter in multiple Systems/Jobs at once? It seems to cause an "The previously scheduled job ... :OnUpdate_LambdaJob0 writes to the Unity.Collections.NativeQueue"

pulsar jay Mar 18, 2021, 5:50 PM

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half jay yes but after sync system

Just happened to stumble upon this: https://medium.com/@5argon/details-of-the-execution-order-of-ecs-in-conjunction-with-normal-scripts-with-updatebefore-1977de86e920

Medium

[Unity ECS] Details of the execution order of ECS in conjunction wi...

Using these attributes are crucial on trying to plug-in a partial ECS into your current full-MonoBehavior game code.

dark cypress Mar 18, 2021, 6:58 PM

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fluid kiln Or is there any way to unbind the rotation of a child without unbinding the tran...

I detached the children from the parent and moved them myself for the billboards.

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fluid kiln Mar 18, 2021, 7:25 PM

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I ended up overriding the transform system for these entities.

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public class FollowParentSystem : SimulationSystem
{
    protected override void OnUpdate(EntityCommandBuffer ecb)
    {
        var localToWorlds = GetComponentDataFromEntity<LocalToWorld>();
        Entities.WithAll<FollowParent>().ForEach((Entity entity, ref LocalToParent localToParent, in Translation translation, in Rotation rotation, in Parent parent) =>
        {
            localToParent.Value = float4x4.TRS(translation.Value, rotation.Value, new float3(1f, 1f, 1f));
            LocalToWorld localToWorld = localToWorlds[entity];
            localToWorld.Value = float4x4.TRS(localToWorlds[parent.Value].Position + translation.Value, rotation.Value, new float3(1f, 1f, 1f));
            ecb.SetComponent(entity, localToWorld);
        }).Schedule();
    }
}```

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I looks like this but I have a small delay that's noticeable since it's the camera that's following the player

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I'm stuck again with the problem of not being able TO READ the parent's LocalToWorld and write to the ref of the child's LocalToWorld

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That forces me to use the EntityCommandBuffer, but I'd really like to directly write into the localToWorld.Value

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Any idea how I can achieve this?

stable sentinel Mar 18, 2021, 8:06 PM

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Hey, I am making a grid based game and not sure how to store and check for items in a certain tile in an non-OOP way

sturdy rune Mar 18, 2021, 8:14 PM

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Has anyone seen/used the Titanfall ECS clone sample project? OpenFall https://wirewhiz.com/category/tutorials/openfall/

Wire Whiz

OpenFall Archives | Wire Whiz

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Was going to play with that this weekend and see what I learn - like the concept and lots of overlap with what I would like to do with my project

bright sentinel Mar 18, 2021, 8:20 PM

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stable sentinel Hey, I am making a grid based game and not sure how to store and check for items...

What do you mean by items here? Like you want to check if a tile is occupied by an object?

stable sentinel Mar 18, 2021, 8:20 PM

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so the rules for a tile

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that it can store 1 type of item

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and a mob

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but every item could be unique

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so for example you can store 10 hammers in 1 place

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but every hammer have their own data

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normally I would put the reference to the object in a container and check

bright sentinel Mar 18, 2021, 8:22 PM

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Does each tile have an entity?

stable sentinel Mar 18, 2021, 8:22 PM

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and I would have that container in the Tile object

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well atm I made a tile archtype

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which has a type component

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so I can setup the map

bright sentinel Mar 18, 2021, 8:24 PM

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Well, I would probably just attach a component to the tile if it has an object. This component could be named something like TileItemData and contain an entity reference to the item (e.g. hammer). That entity would then have all the data it needs.

stable sentinel Mar 18, 2021, 8:24 PM

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Is that ecs friendly?

bright sentinel Mar 18, 2021, 8:24 PM

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What do you mean by that?

stable sentinel Mar 18, 2021, 8:25 PM

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well I thought I shouldn't treat entity as an object

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and that it should contain only simple data types

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because technically the tile knowing that is has an item is not needed

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but some other system must know

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that place is occupied

bright sentinel Mar 18, 2021, 8:26 PM

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Well, how do you then ensure that there is only one item attached to that tile?

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It's fine to use entity references on components

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It's not too efficient to access the data on that entity from the tile

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But that will happen pretty rarely anyways, no?

stable sentinel Mar 18, 2021, 8:29 PM

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it is like stockpile

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but I can query for the item

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in the entity manager

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so this part is only for checking empty spots or whether an item or mob can be moved into that tile

bright sentinel Mar 18, 2021, 8:30 PM

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If you don't care about what that item is from a tile, then you can just attach a tag to the tile without any data

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But then how would you interact with that item or mob?

slim nebula Mar 18, 2021, 8:31 PM

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stable sentinel Hey, I am making a grid based game and not sure how to store and check for items...

You could use a shared component that has a value of the tile ID and then just
query using that shared component for all of the items in that tile

stable sentinel Mar 18, 2021, 8:31 PM

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I meant that when eg a worker looks for a stone

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for a building I wouldn't look into the tiles

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but look for a stone in the entities

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so I don't access them from the tile

bright sentinel Mar 18, 2021, 8:32 PM

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Sure, that's all fine and good if you don't need to know what tile the stone is on

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But if you're gonna do any pathfinding of sort, then you'll need to know that

stable sentinel Mar 18, 2021, 8:32 PM

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true

bright sentinel Mar 18, 2021, 8:32 PM

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The item could also store which tile it is attached to

stable sentinel Mar 18, 2021, 8:33 PM

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so basically what @slim nebula said

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?

slim nebula Mar 18, 2021, 8:34 PM

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That's what I meant yeah each item would just have a shared component which is basically a hashed index into a sub collection of all the components in that archetype

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That's not literally how ECS stores it but it's one way of looking at it

bright sentinel Mar 18, 2021, 8:34 PM

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Why a shared component?

slim nebula Mar 18, 2021, 8:34 PM

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Because you can filter all of the entities returned for an archetype based on the value of the shared component

stable sentinel Mar 18, 2021, 8:34 PM

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I guess I can do this for mobs and walls, etc

slim nebula Mar 18, 2021, 8:35 PM

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So you don't have to loop through all entities in that archetype you only have to do a hashing algorithm then you only look at the subset that you care about in the actual tile you care about

stable sentinel Mar 18, 2021, 8:35 PM

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yeah that's sounds good

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thank you!

bright sentinel Mar 18, 2021, 8:37 PM

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slim nebula That's what I meant yeah each item would just have a shared component which is b...

I'm having a hard time understanding what half the sentence even means lol

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I'm a bit smooth brained here

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What is a hashed index?

slim nebula Mar 18, 2021, 8:38 PM

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XD no worries

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so a shared component needs to implement GetHashCode and IEquatable

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when you do a query you can create an instance of a shared component and populate the values on that instance and pass that in to filter the query

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each shared compoonent value is only stored once per chunk

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every entity in that architype has the same shared component value

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if you change the value on that shared component, the backend moves that entity to a new or existing architype with the value you've specified

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so

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when you pass in the shared component value to filter by, it only returns architypes that have that same shared component value, by hashing (gethashcode) the shared component and looking it up in a hashtable

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so it doesn't have to O(n) through every architype that has a shared component value

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it's going to O(1) (although a hash algo is a bigger 1 than each n would be in the other case)

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and return only the architypes with the value you specified

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obv this is terrible if you only have like 1 item in each tile. you're doing a hashing algo when you could instead loop through 10 items in your entire world

bright sentinel Mar 18, 2021, 8:42 PM

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Right, that all makes sense. But how does it solve the issue at hand?

slim nebula Mar 18, 2021, 8:42 PM

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but if it's a performance problem and you need to not be doing O(N), this can help you

stable sentinel Mar 18, 2021, 8:42 PM

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Because I want to store more items

slim nebula Mar 18, 2021, 8:42 PM

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so on each item you put a shared component that points to the tile

stable sentinel Mar 18, 2021, 8:42 PM

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that are unique

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but the same type

slim nebula Mar 18, 2021, 8:43 PM

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then you query for all items and filter by the shared component value, which is the tile

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the entity query will return you only the items in the tile without iterating or processing any other items

stable sentinel Mar 18, 2021, 8:43 PM

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plus this works if I want to make chests

bright sentinel Mar 18, 2021, 8:43 PM

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Wait, won't that mean you'll have an archetype for each new item that is not on the same tile?!

stable sentinel Mar 18, 2021, 8:43 PM

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I would have a hammer archtype

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that has a shared component

slim nebula Mar 18, 2021, 8:44 PM

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yup, just like you might store arrays of items in a hashmap keyed by the tile id

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except each element of the hashmap is a static sized allocation (chunk) to improve allocator performance

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it's just storing an array in a hashmap

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but using EcS ApIs

bright sentinel Mar 18, 2021, 8:45 PM

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But this is from the docs:

Avoid too many shared components and values on the same archetype. Since each combination of values, whether in the same component type or in different shared components, is stored in different chunks, too many combinations can lead to poor chunk utilization.

slim nebula Mar 18, 2021, 8:45 PM

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yup

stable sentinel Mar 18, 2021, 8:45 PM

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they have 1 shared component

bright sentinel Mar 18, 2021, 8:45 PM

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And since he wants a single item on each tile, isn't this going to be horrible?

stable sentinel Mar 18, 2021, 8:46 PM

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which is tile id

slim nebula Mar 18, 2021, 8:46 PM

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if you're just putting like 1 item in each chunk and have 10,000 chunks then 10,000 * O(hash) is wayyyyyyyyy slower than O(10,000)

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better to just loop through all of them and find the one with the right ID if that's the case

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but those are really the only 2 solutions. loop through a list, or index the list somehow

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another way to index the list would be to have some coordinate system

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like if your map was static

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then you could have static arrays

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and index into them directly instead of using a hashing algo to find your data

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but if your hash is fast, then maybe that's not really much better

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but yeah it depends on the case

bright sentinel Mar 18, 2021, 8:49 PM

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It just seems in this case it's not the correct solution

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Over just storing the tile on a normal component?

slim nebula Mar 18, 2021, 8:49 PM

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ok sorry. I didn't see he wanted to do one item. I did say it was bad with few items above too

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storing the tile?

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never mind sorry

stable sentinel Mar 18, 2021, 8:50 PM

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the tile is like any sim game like dwarf fortress, rimworld

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so I just want to store 1 or more items

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but most cases probably not a lot

slim nebula Mar 18, 2021, 8:51 PM

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oof yeah sorry my way is bad. I thought u meant tile like.... i imagined like a room or something sorry

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my way will use 16kb of memory per architype per tile

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which probably isn't viable for u

stable sentinel Mar 18, 2021, 8:52 PM

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probably no

slim nebula Mar 18, 2021, 8:52 PM

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ECS doesn't have a way to index data in ways other than that hashing I don't think

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I think to get around that you'd probably just have to use your own NativeCcollections

stable sentinel Mar 18, 2021, 8:53 PM

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so should I have a NativeList of the items inside the tile archtype?

slim nebula Mar 18, 2021, 8:53 PM

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point to existing item entities so you ccan still process things of similar architype efficiently

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no i meant like collections on a system

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indexing data stored outside of ecs

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some way to look up an entity based on whatever the thing that needs to access that rock has

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you can do like what ecs does with entities where each tile is an index into an array. then that array element points to another array of items. each item value is an entity which you can get from ECS.

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that way you're not doing a hash

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then reuse empty slots or something depending on requirements of your game I dunno

fluid kiln Mar 18, 2021, 8:57 PM

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Do you guys know of any way to write directly into a component when I need to get the same component from the parent?

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Since I can't do GetComponent when I have the same type as ref in my ForEach

slim nebula Mar 18, 2021, 8:59 PM

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it sounds like you have the ref variable named the same thing as the variable set by GetComponent. you should just be able to name them different variable names. or am I missing something?

fluid kiln Mar 18, 2021, 8:59 PM

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No because when you have a certain component in your ForEach lambda, you can't do GetComponent on the same type but another entity

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Take this for example: protected override void OnUpdate(EntityCommandBuffer ecb) { Entities.WithAll<FollowParent>().ForEach((Entity entity, ref LocalToParent localToParent, ref LocalToWorld localToWorld, in Translation translation, in Rotation rotation, in Parent parent) => { localToParent.Value = float4x4.TRS(translation.Value, rotation.Value, new float3(1f, 1f, 1f)); localToWorld.Value = float4x4.TRS(GetComponent<LocalToWorld>(parent.Value).Position + translation.Value, rotation.Value, new float3(1f, 1f, 1f)); }).Schedule(); }

slim nebula Mar 18, 2021, 9:00 PM

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oh

stable sentinel Mar 18, 2021, 9:00 PM

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oh you want to access 2 components of the same entity?

slim nebula Mar 18, 2021, 9:00 PM

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just do a thing

#

1 sec

fluid kiln Mar 18, 2021, 9:00 PM

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I want to write into the child's LocalToWorld, but I also need to Get the parent's LocalTOWorld

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And I don't want to use a command buffer

slim nebula Mar 18, 2021, 9:00 PM

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do

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var blah = GetComponentDataFromEntity<PhysicsVelocity>()

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above the query

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then

fluid kiln Mar 18, 2021, 9:01 PM

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But then I can't write in it can I?

slim nebula Mar 18, 2021, 9:01 PM

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uhh no you're right that's for foreground hmm

stable sentinel Mar 18, 2021, 9:01 PM

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Isn't there a SetComponent?

fluid kiln Mar 18, 2021, 9:01 PM

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SetComponent is main thread only

slim nebula Mar 18, 2021, 9:02 PM

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GetComponent wouldn't let you change things anyway

#

you'd need to do multiple queries and pass them to your job

fluid kiln Mar 18, 2021, 9:02 PM

#

I know Unity uses GetComponentDataFromEntity to do the exact same thign in their Transform systems

slim nebula Mar 18, 2021, 9:02 PM

#

the query syntax doesn't support this I guess

#

unless theres something I dont know

#

Ijobchunkentity something something

#

I forget

stable sentinel Mar 18, 2021, 9:03 PM

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can you do a query inside a query?

fluid kiln Mar 18, 2021, 9:03 PM

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No :/

slim nebula Mar 18, 2021, 9:03 PM

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

#

my understanding is that this is what the query uses in the background

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I think you can customize the things you want if you query this way but I don't know a shit ton about it sorry

fluid kiln Mar 18, 2021, 9:05 PM

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I'm not familiar with jobs 😦

slim nebula Mar 18, 2021, 9:05 PM

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me either 😦

#

I just saw ppl usin this earlier for complex queries

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was highly praised I dunno enough about it tho

fluid kiln Mar 18, 2021, 9:05 PM

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I'm thinking of creating a temporary component, one system could set it to the parent's value

#

Then another system takes thgis temp component and writes to it

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That actually makes sense even tho it dupplicates data

slim nebula Mar 18, 2021, 9:06 PM

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no

#

1 sec

#

            EntityCommandBuffer buffer = new EntityCommandBuffer(Unity.Collections.Allocator.Temp);

            Entities
                .ForEach((
                    Entity entity,
                    ref MovableObjectPhysicsComponent simulated,
                    ref LocationDataComponent location) =>
                {
                    buffer.SetComponent(simulated.PhysicsEntity, new Translation { Value = location.Translation });
                    buffer.SetComponent(simulated.PhysicsEntity, new Rotation { Value = location.Rotation });

                    buffer.SetComponent(simulated.PhysicsEntity, new PhysicsVelocity
                    {
                        Angular = location.AngularVelocity,
                        Linear = location.LinearVelocity,
                    });
                }).Run();

            buffer.Playback(EntityManager);
            buffer.Dispose();```

fluid kiln Mar 18, 2021, 9:07 PM

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Yeah but i kindof need the change to happen immediately, not in the command buffer

slim nebula Mar 18, 2021, 9:07 PM

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so rather than making temp components, just cache the "temp components" in an entity command buffer and play it back when it's done

#

but the temp components wont happen immediately either tho rite?

fluid kiln Mar 18, 2021, 9:07 PM

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It should since it'll already exist on the entity, I'll only write to it

slim nebula Mar 18, 2021, 9:08 PM

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ah ic what u mean

zenith wyvern Mar 18, 2021, 9:08 PM

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fluid kiln SetComponent is main thread only

If you use GetComponent or SetComponent inside a ForEach in a system base it will work, it gets converted into CDFE during codegen

slim nebula Mar 18, 2021, 9:08 PM

#

wew nice

fluid kiln Mar 18, 2021, 9:08 PM

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Even with Schedule? I remember it not working but maybe htat was an older version?

slim nebula Mar 18, 2021, 9:09 PM

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(what is CDFE?)

zenith wyvern Mar 18, 2021, 9:09 PM

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Yes, it works in bursted jobs. But only in a ForEach, not if you write a custom job

#

ComponentDataFromEntity

slim nebula Mar 18, 2021, 9:09 PM

#

ah gotcha

fluid kiln Mar 18, 2021, 9:09 PM

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Ooh well let me try this then

#

Well I'll be damned, I've been working for months thinking SetComponent couldn't be used in a bursted job

#

Smhhhhhh

#

I was wondering why I was using EntityCommandBuffer soooo much

#

Very clutch Mr. Sark thank you

zenith wyvern Mar 18, 2021, 9:15 PM

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It won't work in Parallel jobs for safety reasons though, you may need to use a command buffer in those cases

fluid kiln Mar 18, 2021, 9:16 PM

#

Got you, well everything is .Schedule for now so I'll rethink that at some other time I guess ^^

stable sentinel Mar 18, 2021, 9:19 PM

#

Other question atm I have variables for the meshes of ground types in a mono object and I use these to assign the meshes to the tile entity is there a better way to do this?

twilit coral Mar 18, 2021, 9:20 PM

#

@midnight sonnet #include doesn't seem to work, it still wants to go line by line :/

stable sentinel Mar 18, 2021, 9:25 PM

#

@slim nebula NativeCcollections work for entites?

#

because then I can just store the entities in the tile for when I need to check them

fluid kiln Mar 18, 2021, 9:26 PM

#

You can use a buffer

stable sentinel Mar 18, 2021, 9:27 PM

#

is that better?

fluid kiln Mar 18, 2021, 9:28 PM

#

Better than a mono object? Probably yeah

stable sentinel Mar 18, 2021, 9:29 PM

#

oh you meant for the meshes?

fluid kiln Mar 18, 2021, 9:29 PM

#

stable sentinel <@!163473768415625216> NativeCcollections work for entites?

Idk I was answering that

stable sentinel Mar 18, 2021, 9:29 PM

#

Okay that was for how I should store the items that are on a tile

fluid kiln Mar 18, 2021, 9:30 PM

#

If tiles are entities and items are entities, I would store the items in a DynamicBuffer on the tile, and also parent them for a nicer hierarchy.

stable sentinel Mar 18, 2021, 9:32 PM

#

Does that allow for fast look ups?

#

when I need to do path finding and stuff

fluid kiln Mar 18, 2021, 9:33 PM

#

Eeeh depends what kind of lookup

#

You could also use an unsafe nativecollection on a component

stable sentinel Mar 18, 2021, 9:35 PM

#

Well I want to able to look for specific items/ objects( like a wall or a character, moster, etc)

fluid kiln Mar 18, 2021, 9:35 PM

#

Well you can do queries at the time that's needed

#

I'd use a foreach for the lookup WithAll<Item, Sword>() but idk your project

stable sentinel Mar 18, 2021, 9:38 PM

#

But then I would make the items as components?

fluid kiln Mar 18, 2021, 9:40 PM

#

An item should probably be an entity with multiple components that define it unless they are very simple

#

In my case (rpgish) an item in an entity that has components like Item, Damage, etc...

stable sentinel Mar 18, 2021, 9:40 PM

#

yeah but WithAll looks for components

fluid kiln Mar 18, 2021, 9:41 PM

#

Yes, a tag compopnent would define what type the item is

#

A component Wall, Monster, Character

stable sentinel Mar 18, 2021, 9:41 PM

#

yeah I got that

#

but how would you check if a tile is occupied

#

so example

#

rimworld

#

you have a tile with wood

#

and you cannot drop a gun there

#

but you can add more wood there

fluid kiln Mar 18, 2021, 9:42 PM

#

So assuming you know what tile you're standing on, maybe the Tile has a tag <Occupied> and that means that when you go to drop the item, if the TIle has the tag Occupied then it can't drop there

#

In that case,

#

Before dropping I would look through the dynamic buffer of items, if it contains an item of the same type i'm tryuing to drop, allow it

#

Otherwise, don't

stable sentinel Mar 18, 2021, 9:43 PM

#

yeah that make sense

#

but then you want to know where is the wood stack

#

and path find the worker to the stack

#

if I query for the wood

#

I get the wood entity

fluid kiln Mar 18, 2021, 9:44 PM

#

Then I'd make it so that every item on the ground, has a reference to the tile it's on

stable sentinel Mar 18, 2021, 9:44 PM

#

I guess I can use the position

fluid kiln Mar 18, 2021, 9:45 PM

#

Then you can doa Foreach like WithAll<Wood>().ForEach((ParentTile tile) => {});

stable sentinel Mar 18, 2021, 9:45 PM

#

so the tile has dynamic buffer component

#

and the item has a reference to the tile

fluid kiln Mar 18, 2021, 9:47 PM

#

Something like that yeah, you'll definitely have to adjust depending on exactly what you're trying to do

#

But if everything is defined through components, then it's easy to query basically anything :p

#

At least I do a lot, I have tons of component that simply hold reference to other components

stable sentinel Mar 18, 2021, 9:49 PM

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I mean if I store a reference to a tile , I could use it to store the holder entity

#

eg if someone has the item I would be able to locate that entity

#

whether it is a tile or a monster, character

fluid kiln Mar 18, 2021, 9:51 PM

#

Yup ;p

stable sentinel Mar 18, 2021, 9:52 PM

#

thanks that helped with the direction a lot

gusty comet Mar 18, 2021, 10:07 PM

#

Hey guys, quick question. Is that normal a mesh converted to entity (URP + ConvertAndDestroy), doesn't take spotlights into account?

fluid kiln Mar 18, 2021, 10:44 PM

#

So I've overriden the transform system so that my parented entities follow the parent without rotation. It looks like this:

#

        {
            float3 scale = HasComponent<Scale>(entity) ? GetComponent<Scale>(entity).Value : HasComponent<NonUniformScale>(entity) ? GetComponent<NonUniformScale>(entity).Value : new float3(1f, 1f, 1f);
            quaternion rotation = HasComponent<Rotation>(entity) ? GetComponent<Rotation>(entity).Value : quaternion.identity;
            float3 translation = HasComponent<Translation>(entity) ? GetComponent<Translation>(entity).Value : float3.zero;
            localToParent.Value = float4x4.TRS(translation, rotation, scale);

            LocalToWorld parentLocalToWorld = GetComponent<LocalToWorld>(parent.Value);
            SetComponent(entity, new LocalToWorld()
            {
                Value = float4x4.TRS(translation + parentLocalToWorld.Position, rotation, scale)
            });
        }).Schedule();```

#

But the camera stutters while following the player

#

I know the player is not stuttering

#

Has anyone done something similar who'd know what causes the stutter?

bright sentinel Mar 19, 2021, 12:01 AM

#

gusty comet Hey guys, quick question. Is that normal a mesh converted to entity (URP + Conve...

Maybe, either way you should use subscenes instead of ConvertToEntity from now on

frosty siren Mar 19, 2021, 12:02 AM

#

can you guys edit Unity.Entities code without moving package from Library/PackageCache to Packages ?

bright sentinel Mar 19, 2021, 12:02 AM

#

No you have to move it there

frosty siren Mar 19, 2021, 12:04 AM

#

Hmmm, terrible CompanionGameObjectUpdateTransformSystem performance or 1900 files in git 🤔

bright sentinel Mar 19, 2021, 12:05 AM

#

Is there a reason why it doesn't suit your needs?

frosty siren Mar 19, 2021, 12:06 AM

#

Don't want to see all of this

bright sentinel Mar 19, 2021, 12:07 AM

#

No I mean is there anything specific in the system that makes it exceptionally bad?

frosty siren Mar 19, 2021, 12:09 AM

#

Yes. You have no tool to prevent system update ALL your entities with CompanionLink. Also it allocates NativeArray with Persistent allocator every frame and Transform[] array with same length. Next it iterates for all entities and access CompanionLink for each entity and fill tranform array with Link.Companion.transform. Only after that it schedules bursted job.

#

So i have few ways to go

Don't use companion at all, means no HybridComponents and ConvertAndDestroy mode
Rewrite it
Don't use this system and write my own but with extra components for transform sync, because CompanionLink is private

bright sentinel Mar 19, 2021, 12:11 AM

#

Well yeah, that's the point of the whole system. You can't really do that much differently.

#

You can go either way tho

#

You can't do much of bursted stuff here though, since there's a lot of managed stuff here

frosty siren Mar 19, 2021, 12:12 AM

#

Rewriting works perfectly, just few lines of code, extra query and extra component

frosty siren Mar 19, 2021, 12:13 AM

#

bright sentinel You can't do much of bursted stuff here though, since there's a lot of managed s...

yeah, i understand. System works with managed data, it can't be super performant

#

but even assuming that system is so bad

bright sentinel Mar 19, 2021, 12:13 AM

#

Well if you can make a better solution, go for it! I'd also encourage you to post it on the DOTS forums if you do it 😄

#

I can direct the devs to it if you do 🙂

frosty siren Mar 19, 2021, 12:16 AM

#

it's already described in this thread
https://forum.unity.com/threads/companiongameobjectupdatetransformsystem-is-very-slow-on-large-scenes.1016305/

Unity Forum

CompanionGameObjectUpdateTransformSystem is very slow on large scenes

I am working with a rather large scene and I have a lot of hybrid components (mostly decal projectors). It appears that even though they're static (and...

bright sentinel Mar 19, 2021, 12:18 AM

#

Ah perfect!

#

Although I'm not sure whether this system will be improved

#

It's likely not something they want to encourage

frosty siren Mar 19, 2021, 12:20 AM

#

And rewriting is really simple. In this thread author solved a problem by adding CopyTransformToGameObject tag to query. It's enough to fix bad performance on large scenes.
https://forum.unity.com/threads/need-copytransformfromgameobject-for-companionlink.912002/#post-5979113

Unity Forum

Feedback - Need CopyTransformFromGameObject for CompanionLink

I recently updated my entities from very old version and can see all this new hybrid/companion/GenerateAuthoringComponent stuff which is just awesome...

bright sentinel Mar 19, 2021, 12:21 AM

#

Well if you don't want the transform synced, then why are you using the companion system anyways?

#

I havent really looked at it, so I don't know what else it does

frosty siren Mar 19, 2021, 12:22 AM

#

bright sentinel Well if you don't want the transform synced, then why are you using the companio...

Because i have a lot static stuff in game, that i want sync rare frames and a lot of stuff that i want to be synced every frame

#

And convertion now is so simple, you can just have whatever gameobject, and if it has SpriteRenderer for example conversion will produce entity with CompanionLink and new hided from hierarchy window gameobject

#

And all is fine, but it all goes to this system

bright sentinel Mar 19, 2021, 12:24 AM

#

Ah, so the problem is if you have an entity with a SpriteRenderer it will automatically add the CompanionLink component, which then runs very inefficiently?

frosty siren Mar 19, 2021, 12:25 AM

#

Yes

#

And automatically adding is nice

bright sentinel Mar 19, 2021, 12:26 AM

#

Yeah, but also automatically running the transform system is not nice

frosty siren Mar 19, 2021, 12:26 AM

#

of course

bright sentinel Mar 19, 2021, 12:27 AM

#

I'll tell the devs, shouldn't be an issue to add that to the entity package

frosty siren Mar 19, 2021, 12:27 AM

#

It would be great, thank you 🙂

bright sentinel Mar 19, 2021, 12:28 AM

#

Literally my job 🙂

#

Also it might take a while for it to get in there, so for now it would be best to do it yourself - either by not using the conversion or by embedding the package

frosty siren Mar 19, 2021, 12:44 AM

#

Maybe i don't understand some basics but...

Since we started talking about problems... I recently faced with strange convertion behaviour. I was trying to switch from ConvertAndDestrroy to ConvertAndInject mode. So to test it i create GO with SpriteRenderer and ConvertToEntity (with ConvertAndInject mode) components. And after conversion i got actually two gameobjects. 1st is original one still in scene as expected, and a 2nd one that linked to entity by CompanionLink and hided from hierarchy window as it happens when ConvertToEntity switched to ConvertAndDestroy.
It's totally ok that ConvertAndIject can produce CompanionLink, it's fine, but doubling gameobject is not.
I found out that it happens when there is GameObjectConversionSystem which do AddHybridComponent(). I have such systems in project and tried to turn it off. For example my Light2DGameObjectConversionSystem which simply do AddHybridComponent(Light2D) produce this behaviour with doubling gameobjects, but when it turned off, gameobject with just Light2D converting perfectly.
Also i found out that this kind of GameObjectConversionSystem for SpriteRenderer is in HybridRenderer package which i'm not actually use, so i removed it. And then all starts to convert fine.
I rewrite my GO conversion system in a way they can check if ConvertToEntity component switched to ConvertAndInject mode. Described it in this thread https://forum.unity.com/threads/solved-convertandinjectgameobject-strange-behaviour.1077644/

Unity Forum

[Solved] ConvertAndInjectGameObject strange behaviour

In my project i mostly use ConvertAndDestroy and Companion workflow. But after i understood performance problem of companion system i started to try...

opaque jay Mar 19, 2021, 8:43 AM

#

Having a transform and a float, anyone knows how can I calculate the point from the transform.position to the float in the transform.forward direction?

frosty siren Mar 19, 2021, 9:20 AM

#

what is "point from transform.position to the float int the transform.forward direction"?

gusty comet Mar 19, 2021, 9:23 AM

#

bright sentinel Maybe, either way you should use subscenes instead of ConvertToEntity from now o...

Same thing 🤷

#

#

It's not computed by my shader (robot) or by the default lit urp one (ground)

bright sentinel Mar 19, 2021, 9:24 AM

#

You're using hybrid renderer v2 right?

gusty comet Mar 19, 2021, 9:25 AM

#

yeap, urp shaders doesn't work otherwise

bright sentinel Mar 19, 2021, 9:25 AM

#

Just wanted to rule out the obvious 😄

gusty comet Mar 19, 2021, 9:25 AM

#

oh though you were gonna say it's a know issue then x)

bright sentinel Mar 19, 2021, 9:26 AM

#

I wish 😄

gusty comet Mar 19, 2021, 9:26 AM

#

and I have the same result removing all post process and ligthing settings 🤷 just an empty scene with camera lights and the two meshes
on 2020 LTS with an URP new project

#

expected result (mono)

bright sentinel Mar 19, 2021, 9:35 AM

#

Oh you are also baking the light right?

gusty comet Mar 19, 2021, 10:08 AM

#

bright sentinel Oh you are also baking the light right?

I don't think so, mode realtime for both lights and auto generate lighting is disabled (but it was on at some point).
Never really checked about light baking cause always worked on procedural stuff

bright sentinel Mar 19, 2021, 10:08 AM

#

I'm pretty sure spotlights really only are supported with baked lighting?

#

Oh wait nvm, that's just the bouncing

#

mb

#

Is the light in your subscene?

gusty comet Mar 19, 2021, 10:25 AM

#

bright sentinel Is the light in your subscene?

tried both, same result. So this is not something that should happen? Maybe I should try with a new project just in case

bright sentinel Mar 19, 2021, 10:26 AM

#

gusty comet tried both, same result. So this is not something that should happen? Maybe I sh...

Hm yeah, probably a good idea. Otherwise report a bug, seems like it should work

hollow jolt Mar 19, 2021, 12:45 PM

#

how to change time scale in DOTS physics ?

shut hare Mar 19, 2021, 1:13 PM

#

Is Unity panning to keep the old workflow by using DOTS as the backend ?

bright sentinel Mar 19, 2021, 1:59 PM

#

shut hare Is Unity panning to keep the old workflow by using DOTS as the backend ?

It's possible right now

shut hare Mar 19, 2021, 1:59 PM

#

Ok i think i saw that somewhere but i'm not sure

hollow jolt Mar 19, 2021, 2:07 PM

#

where is the entery point for ecs phyiscs ? what creates the simulation and drives it ? im trying to look at the source to find how to manually set time scale

hollow jolt Mar 19, 2021, 2:50 PM

#

if i want to set a global gravity scale factor , then i would need to add accessors in the following classes ( might be more then this )
PhysicsStep, PhysicsStepAuthoring, SimulationStepInput, StabilizationData, PhysicsGravityFactor
this seems like an overkill

lean raptor Mar 19, 2021, 2:52 PM

#

Just wondering, did someone made a performance test between Unity Jobs and C# Task? (I'm talking outside DOTS and without Burst Compiler). I mean, the raw cost of scheduling a Unity Job vs a C# Task

deft stump Mar 19, 2021, 3:05 PM

#

@lean raptor https://www.jacksondunstan.com/articles/4926

JacksonDunstan.com | C# Tasks vs. Unity Jobs

JacksonDunstan.com covers game programming

#

job > task

lean raptor Mar 19, 2021, 3:12 PM

#

Thanks

#

Question, if I do:

JobHandle.CombineDependencies(new Job1(...).Schedule(), new Job2(...).Schedule()).Schedule().Complete()

Will Job1 and Job2 run in two different threads or will they be executed on the main thread?

deft stump Mar 19, 2021, 3:19 PM

#

depends on what the job system decides

#

but typically yes

#

they'll run on different threads

#

but they wont run at the same time.
job2 will run AFTER job1 finishes.
no matter which thread job1 finishes

lean raptor Mar 19, 2021, 3:22 PM

#

job2 will run AFTER job1 finishes.
Why? Job2 doesn't depend on Job1, but actually the third job (.CombineDependencies) depends on both Job2 and Job1

deft stump Mar 19, 2021, 3:23 PM

#

Hrmmmmm just checked the docs, sorry you're right. I haven't touched jobs in a long while

lean raptor Mar 19, 2021, 3:24 PM

#

ok

sharp flax Mar 19, 2021, 3:36 PM

#

there's no guarantee to tell where your scheduled jobs will run, or if they'll be executed by two different threads. If you had 4 threads and 3 were busy doing other heavy workload, the remaining one would do both job1 and job2. You can use Run with IJobs and IJobFors instead of schedule to run a job on the main thread though

spring pumice Mar 19, 2021, 4:52 PM

#

Hey Hey. Quick Question: in order to make a system run After an other system i just need to add the [UpdateAfter(typeof(InputSystemH))] to the system right? Cuz that does not work in my case. Also: Does it maybee not work on systems operating with monobehaviors? Thanks

zenith wyvern Mar 19, 2021, 4:54 PM

#

That's all you need to do, yes. It causes one system's OnUpdate function to run after another's

#

If your first system is scheduling jobs maybe that's why it seems off to you

spring pumice Mar 19, 2021, 4:56 PM

#

thanks for your answer. actually i have no job runing i am just getting started so i just the simple Entities.ForEach loop.

zenith wyvern Mar 19, 2021, 4:57 PM

#

What's happening that makes you think they aren't running in the order you expect?

spring pumice Mar 19, 2021, 4:57 PM

#

they give me Debug.Logs in wrong order

zenith wyvern Mar 19, 2021, 4:58 PM

#

Can you show the code?

spring pumice Mar 19, 2021, 4:59 PM

#

yes i can. wait a second

#

ehm sorry where do you guys share code? 😅 i kinda dont get how hastbin works

zenith wyvern Mar 19, 2021, 5:07 PM

#

You can use hatebin or code tags. https://www.wepc.com/how-to/discord-text-formatting/#:~:text=Discord supports code blocks with,the text%2C as shown below.

spring pumice Mar 19, 2021, 5:09 PM

#

https://hatebin.com/pqqyyiuzar

zenith wyvern Mar 19, 2021, 5:11 PM

#

Hmm, maybe it doesn't work with ComponentSystem? If you're 100% sure you're seeing "43" printed before "42" then that's all I can assume, otherwise I don't see what the problem would be

#

ComponentSystem is pretty old at this point and it's been replaced by SystemBase

rancid shell Mar 19, 2021, 5:14 PM

#

So hows Unity DOTS doing atm?

spring pumice Mar 19, 2021, 5:14 PM

#

hm yes:

#

i can try to replace with SystemBase an look what thats doing

#

hm same error, i mean same order of logs

#

https://hatebin.com/wtyhguqbno looks like that now

zenith wyvern Mar 19, 2021, 5:32 PM

#

Are you sure an entity exists for that first system to match against before the second system runs?

spring pumice Mar 19, 2021, 5:33 PM

#

Ahhhh damm i know why

#

i wrote a helper class that helps to convert child s of "ConvertToEntity" with InjectGameObject. It does that while adding "ConverToEntity" to the childobjects first and to the parent objects in the next frame

#

and the Input Object is a parent of the CameraObject in the heriacy

#

so in the first frame the camera Object is converted but the input object not.

zenith wyvern Mar 19, 2021, 5:36 PM

#

That sounds like a good way to constantly be fighting against the conversion system

spring pumice Mar 19, 2021, 5:37 PM

#

I did that because the normal "ConvertToEntity" did not work on child objects of other "ConvertToEntity". Objects

#

it worked with conversion mode "Convert and Destory" but not with "Convert and inject Gameobject"

#

so yeah 😄 looks like that is my real problem

zenith wyvern Mar 19, 2021, 5:38 PM

#

You should consider using hybrid components if you can, they make this kind of thing a lot simpler

#

Instead of bothering with "ConvertAndINject". I've always ended up regretting it when I try to use that

spring pumice Mar 19, 2021, 5:39 PM

#

how do i use hybrid components?

zenith wyvern Mar 19, 2021, 5:39 PM

#

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

fluid kiln Mar 19, 2021, 5:42 PM

#

I am still yet to figure out why clients are able to connect ONLY if they are ran before the server. It's completely mind boggling to me. If I make a client build, run it, then run the server it works. If I run the server, then run the client, the player is instantiated on the server but no message is received by the client.

#

In my head it cannot be anything else than the behavior of my systems once a connection request in received.


[UpdateInGroup(typeof(ClientInitializationSystemGroup))]
[UpdateBefore(typeof(GhostInitializationSystemGroup))]
public class ConnectedClientSystem : InitializationSystem
{
    protected override void OnUpdate(EntityCommandBuffer ecb)
    {
        Entities.WithNone<NetworkStreamInGame>().ForEach((Entity ent, ref NetworkIdComponent id) =>
        {
            ecb.AddComponent<NetworkStreamInGame>(ent);

            var req = ecb.CreateEntity();
            ecb.AddComponent<GoInGameRequest>(req);
            ecb.AddComponent(req, new SendRpcCommandRequestComponent { TargetConnection = ent });
        }).Schedule();
    }
}

[UpdateInGroup(typeof(ServerInitializationSystemGroup))]
[UpdateBefore(typeof(GhostInitializationSystemGroup))]
public class ConnectedServerSystem : InitializationSystem
{
    protected override void OnUpdate(EntityCommandBuffer ecb)
    {
        var playerPrefab = GetSingleton<PlayerPrefab>().entity;

        Entities.WithNone<SendRpcCommandRequestComponent>().ForEach((Entity reqEnt, ref GoInGameRequest req, ref ReceiveRpcCommandRequestComponent reqSrc) =>
        {
            ecb.AddComponent<NetworkStreamInGame>(reqSrc.SourceConnection);

            int networkId = GetComponent<NetworkIdComponent>(reqSrc.SourceConnection).Value;

            var player = ecb.Instantiate(playerPrefab);
            ecb.SetComponent(player, new GhostOwnerComponent() { NetworkId = networkId });
            ecb.AddBuffer<PlayerInput>(player);

            ecb.SetComponent(reqSrc.SourceConnection, new CommandTargetComponent { targetEntity = player });

            ecb.DestroyEntity(reqEnt);
        }).Schedule();
    }
}```

spring pumice Mar 19, 2021, 5:44 PM

#

zenith wyvern https://docs.unity3d.com/Packages/com.unity.entities@0.17/manual/hybrid_componen...

thanks for your help so far, i gues i have to overthing some things now 😄

fluid kiln Mar 19, 2021, 5:45 PM

#

Are those of you working with netcode able to connect a client to an existing server? If yes, do you do something different than above? Do you know what could cause this?

north bay Mar 19, 2021, 5:54 PM

#

When is that ecb played back?

fluid kiln Mar 19, 2021, 5:55 PM

#

In the ClientServerInitializationSystemGroup

#

I've just tried removing the ecb, and just having the buffer immediately on the entity prefab

#

Still doesn't work

#

Unless.... it's other parts of the ecb you,re referring to?

north bay Mar 19, 2021, 5:56 PM

#

No, I mean the one passed to the OnUpdate'

#

Your code looks correct to me

fluid kiln Mar 19, 2021, 5:57 PM

#

EndInitializationEntityCommandBufferSystem

north bay Mar 19, 2021, 5:57 PM

#

You are on netcode version 0.6?

fluid kiln Mar 19, 2021, 5:57 PM

#

Yeah

#

Could it be that ecb is too late or too early? I know in the getting started guide they use the entity manager instead

north bay Mar 19, 2021, 5:58 PM

#

Are you not receiving any messages from the server?

fluid kiln Mar 19, 2021, 5:59 PM

#

The server spawns the player prefab, the client does not receive ANY message

north bay Mar 19, 2021, 5:59 PM

#

In 0.5 the connection flow broke when adding it (NetworkStreamInGame) during the simulation system group

#

Don't know if they fixed that

fluid kiln Mar 19, 2021, 5:59 PM

#

It should be InitializationSystemGroup

#

Maybe it's my subclassing that breaks things

north bay Mar 19, 2021, 6:00 PM

#

huh

#

I'm really looking for something but from what I remember that should work

fluid kiln Mar 19, 2021, 6:01 PM

#

Exactly, it's exactly like the doc... could a problem like this originate from somewhere else? Say during the connection?

#

    {
        EntityManager.DestroyEntity(initEntity);

        foreach (var world in World.All)
        {
            var network = world.GetExistingSystem<NetworkStreamReceiveSystem>();
            if (world.GetExistingSystem<ClientSimulationSystemGroup>() != null)
            {
                // Client worlds automatically connect to localhost
                NetworkEndPoint ep = NetworkEndPoint.LoopbackIpv4;
                ep.Port = networkPort;
                network.Connect(ep);
            }
#if UNITY_EDITOR
            else if (world.GetExistingSystem<ServerSimulationSystemGroup>() != null)
            {
                // Server world automatically listens for connections from any host
                NetworkEndPoint ep = NetworkEndPoint.AnyIpv4;
                ep.Port = networkPort;
                network.Listen(ep);
            }
#endif
        }
    }```

north bay Mar 19, 2021, 6:01 PM

#

You said that the server is actually spawning the prefab so I would say no

fluid kiln Mar 19, 2021, 6:02 PM

#

I'm gonna try to derive directly from InitializatioNSystemGroup

north bay Mar 19, 2021, 6:02 PM

#

Anything else touching that NetworkStreamInGame component?

fluid kiln Mar 19, 2021, 6:03 PM

#

Nope only references are in these two systems

north bay Mar 19, 2021, 6:04 PM

#

Let me get my IDE up and look what my connection flow looks like

fluid kiln Mar 19, 2021, 6:04 PM

#

Thanks I appreciate it

#

I'm gonna remove burst and check with some debug logs

#

north bay Mar 19, 2021, 6:12 PM

#

https://pastebin.com/bf6nHz8D
That's the stripped down version of a simple connection flow that I made some time ago

fluid kiln Mar 19, 2021, 6:12 PM

#

Client connecting late logs

📎 message.txt

north bay Mar 19, 2021, 6:14 PM

#

Can you log the amount of ghost components that exist on the client?

#

Or how do you currently determine that the client doesn't receive anything?

fluid kiln Mar 19, 2021, 6:15 PM

#

I try the opposite, so building a server, running the editor as client only

#

No PlayerPrefab is instantiated on the client

#

There's no networkid entity

#

Why would it work if the server doesn't exist, but not if it does

#

It makes no sense 😂

#

Your code uses a lot of elements I'm not familiar with

#

You say "We wait until all subscens are loaded before we go in game this is a requirement of..."

#

I don't do that but it actually makes a lot of sense

#

If the client is runnign for a few seconds before the server comes online, the client has time to load the subscenes

#

If it tries to log in immediately, then it goes online before the subscenes are loaded 😮

north bay Mar 19, 2021, 6:23 PM

#

I think it throws errors if the server tries to spawn an entity that wouldn't exist on the client

#

The subscene check I have there is for pre-spawned entities, entities that already exist inside a subscene and aren't spawned through code

fluid kiln Mar 19, 2021, 6:24 PM

#

And by the time we're here "SendGoInGameRequestClient ", I should have my NetworkId, you're right

#

That's not it

#

So the client is able to communicate with the server, but the server is not able to communicate with the client?

#

And only if the server has been launched first

#

Oop- It only happens when there's already a client connected on the server 🤔

#

Further investigation: the prefab of the 2nd client is instantiated on the server, but the networkidcomponent is not

karmic basin Mar 19, 2021, 6:50 PM

#

@fluid kiln someone here had a similar problem

#

I did not

fluid kiln Mar 19, 2021, 6:51 PM

#

Pretty sure it was me 😂

karmic basin Mar 19, 2021, 6:51 PM

#

the answer was a fail safe with a RequireSingletonForUpdate

fluid kiln Mar 19, 2021, 6:51 PM

#

Oh

karmic basin Mar 19, 2021, 6:51 PM

#

nope, not you

#

lemme check what it was, might be related to your problem

fluid kiln Mar 19, 2021, 6:52 PM

#

Usually these fails are logged in the console no?

karmic basin Mar 19, 2021, 6:52 PM

#

IIRC it was the ghostcollection maybe

#

nah it was a silent nasty one, and not reproductible 100 percent (the dude had it, I didnt)

fluid kiln Mar 19, 2021, 6:53 PM

#

😮

karmic basin Mar 19, 2021, 6:53 PM

#

lemme boot my IDE I'll check that

#

#

Maybe that's why you dont see your player instanciated

#

the fix was confirmed by a unity dev

#

might find a trace of that in the forums

fluid kiln Mar 19, 2021, 6:55 PM

#

Uuggh that sounds like my problem but I haven't been using the ghostprefabcollection

karmic basin Mar 19, 2021, 6:55 PM

#

(don't mind the ComponentSystem, I didn't bother to update yet)

fluid kiln Mar 19, 2021, 6:55 PM

#

Nor any requiresingletonforupdate for that matter

karmic basin Mar 19, 2021, 6:55 PM

#

you dont use ghosts ? custom solution ?

fluid kiln Mar 19, 2021, 6:56 PM

#

I use ghost but the ghostprefabcollection isn't necessary anymore

#

I have an entity singleton that holds the player prefab in reference

karmic basin Mar 19, 2021, 6:56 PM

#

oh didnt see 0.6 got rid of ghostcollection

fluid kiln Mar 19, 2021, 6:57 PM

#

The server receives the connection, that I'm 100% sure, but it never instantiates a NetworkClientId for that client.

#

But for it to instantiate a player prefab, it needs to find a networkidcomponent

#

Maaan what the hell

karmic basin Mar 19, 2021, 7:02 PM

#

fluid kiln

How the hell does your server listen after the client connects ? You launch editor then standalone build ?

fluid kiln Mar 19, 2021, 7:02 PM

#


        foreach (var world in World.All)
        {
            var network = world.GetExistingSystem<NetworkStreamReceiveSystem>();
            if (world.GetExistingSystem<ClientSimulationSystemGroup>() != null)
            {
                // Client worlds automatically connect to localhost
                NetworkEndPoint ep = NetworkEndPoint.LoopbackIpv4;
                ep.Port = networkPort;
                network.Connect(ep);
            }
#if UNITY_EDITOR
            else if (world.GetExistingSystem<ServerSimulationSystemGroup>() != null)
            {
                // Server world automatically listens for connections from any host
                NetworkEndPoint ep = NetworkEndPoint.AnyIpv4;
                ep.Port = networkPort;
                network.Listen(ep);
            }
#endif
        }```

#

It just comes first in the code ^^

#

So the server creates a NetworkdIdComponent for the second client, but it is IMMEDIATELY destroyed.

#

What causes a connection to be destroyed?

#

Some tomfoolery is deleting my connection as soon as it's created

karmic basin Mar 19, 2021, 7:10 PM

#

Do you think it could be related to your LAN ?

fluid kiln Mar 19, 2021, 7:10 PM

#

That's what I'm starting to think. Because I paused the game as soon as I got the connection request from the client, moved a few frames to notice that the connection is in fact created and attached to the spawned entity. And when i resumed the game the client was well connected p.p

#

So it only happens when everything happens too quickly I guess? It's strange but I think I'll ignore it for now. It doesn't impede my work and might truly be completely unrelated to my code

remote crater Mar 19, 2021, 7:36 PM

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https://forum.unity.com/threads/any-help-porting-my-old-dots-code-to-new-dots-version-i-get-one-error.1078361/

Unity Forum

Any help porting my old DOTS code to new DOTS version? I get one er...

Hello,

I've used DOTS before and my code no longer compiles. Does anyone have recent sample code for DOTS/ECS? I have got to the part of my project...

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Hello guys. I gotta pick my mom up from work, her car giving issues. Plz message personally how to get rid of that one error. Sorry no time for proper intro. 🙂

stable sentinel Mar 19, 2021, 10:36 PM

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did IJobForEach get replaced?

safe lintel Mar 19, 2021, 10:47 PM

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well they havent yet released the direct replacement though its deprecated

fluid kiln Mar 19, 2021, 11:14 PM

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So I can't mark objects static? How do I bake my lightmaps?

vivid lotus Mar 20, 2021, 4:59 AM

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Hey all. If I have a managed component like this (has to be managed to easily store a NativeArray, right?):

public class SpriteLibrary : IComponentData
{
    public NativeArray<Entity> SpriteEntities;
}

and I want to make a singleton with one of these on it from a MonoBehaviour, would this be the proper way to do it?

private void CreateLibrarySingleton()
{
    EntityManager manager = World.DefaultGameObjectInjectionWorld.EntityManager;
    Entity entity = manager.CreateEntity(ComponentType.ReadOnly<SpriteLibrary>());
    manager.GetComponentData<SpriteLibrary>(entity).SpriteEntities = spriteEntities;
}

And then later, in some system's OnUpdate:

protected override void OnUpdate()
{
    NativeArray<Entity> spriteEntities = this.GetSingleton<SpriteLibrary>().SpriteEntities;
    
    Entities
        .ForEach((Entity entity, int entityInQueryIndex, in WhateverComponent whatever) =>
        {
            // ...
            Entity toUse = spriteEntities[someIndex];
            // ...
        }).ScheduleParallel();
}

That would be okay usage, even though it's a managed component, right?

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Alternatively, if anyone could recommend a better way, if there is one, of getting a NativeArray from one system to another (or from a MonoBehaviour to a system), I'd appreciate it. I tried just storing it statically but Unity seems to do something weird with accessing static managed data in OnUpdate.

zenith wyvern Mar 20, 2021, 5:08 AM

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vivid lotus Hey all. If I have a *managed* component like this (has to be managed to easily ...

Why not use a dynamic buffer instead

vivid lotus Mar 20, 2021, 5:08 AM

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Can a dynamic buffer be a singleton?

zenith wyvern Mar 20, 2021, 5:08 AM

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Yes

vivid lotus Mar 20, 2021, 5:09 AM

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Can you access them by index? I can't find much about them.

zenith wyvern Mar 20, 2021, 5:10 AM

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If you mean the elements of the buffer, yes

vivid lotus Mar 20, 2021, 5:10 AM

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My concern about that is, what if I need a NativeHashMap or something stored in a singleton as well? DynamicBuffers seem a little limited.

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That's why I was leaning towards a managed component. Then I could just store whatever in there.

zenith wyvern Mar 20, 2021, 5:12 AM

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If you need something other than a resizable list then yeah you can't use a dynamic buffer

vivid lotus Mar 20, 2021, 5:12 AM

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Managed-component singletons are a thing, since there's extension methods for them, I'm just not sure how to create one from a MonoBehaviour.

zenith wyvern Mar 20, 2021, 5:13 AM

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There's also dependency issues to consider when you're manually passing native containers into jobs. You should strongly prefer using dynamic buffers when you can

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It will save you headaches

zenith wyvern Mar 20, 2021, 5:13 AM

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vivid lotus Managed-component singletons *are* a thing, since there's extension methods for ...

What do you mean create one from a Monobehavior?

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An entity?

vivid lotus Mar 20, 2021, 5:14 AM

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The entity containing the singleton in question yeah.

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See CreateLibrarySingleton() above. That's inside a MonoBehaviour.

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But that doesn't seem to work. Actually, it crashes Unity.

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Basically, what I'm trying to do is, at an arbitrary time after the game starts up (after systems are created), I want to crunch some assets and prepare a library of data for various systems to use.

zenith wyvern Mar 20, 2021, 5:18 AM

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var em = World.DefaultGameObjectInjectionWorld.EntityManager;
var component = new SpriteLibrary
{
  SpriteEntities = new NativeArray(10, Allocator.Persistent);
};
var e = em.CreateEntity();
em.AddComponentData(e, component);

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Should be more or less what you want

vivid lotus Mar 20, 2021, 5:18 AM

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Basically, I'm having trouble structuring how to get that data to the systems.

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Okay, let me try this.

zenith wyvern Mar 20, 2021, 5:18 AM

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And I assume you know that you need to manually dispose that native array before you entity gets destroyed/before your game ends or you will leak memory

vivid lotus Mar 20, 2021, 5:19 AM

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Yeah, that's handled by the MonoBehaviour that actually owns the array.

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Generally speaking though, is there a better way to do this? I need more complex data structures than just arrays eventually.

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To store basically static read-only game data for systems to access globally.

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I had thought that a managed singleton component would be the way to go.

zenith wyvern Mar 20, 2021, 5:20 AM

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Pretty sure that's what BlobAssets are for, I haven't messed with them much myself

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Those only have built in support for arrays as well though, but they can do nested arrays without resorting to unsafe code, unlike regular native arrays

vivid lotus Mar 20, 2021, 5:21 AM

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Oh it can hold strings, that's nice.

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So this would then go in an unmanaged component singleton I guess?

zenith wyvern Mar 20, 2021, 5:23 AM

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They can be stored in regular components

vivid lotus Mar 20, 2021, 5:25 AM

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Well if that's the intended way to do global config data then I'll certainly look into it.

zenith wyvern Mar 20, 2021, 5:27 AM

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It just gives you references to static immutable data that won't cause dependency headaches when shared between jobs

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And as mentioned above gives you a bit more flexibility in how you structure your data compared to normal native containers

vivid lotus Mar 20, 2021, 5:28 AM

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Gotcha yeah. Looking at this it makes sense how this is intended to be used https://coffeebraingames.wordpress.com/2020/11/29/getting-started-with-blob-asset/. I think I'll go with these then, thanks.

amber flicker Mar 20, 2021, 11:36 AM

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Does it make sense for a dependency to be propagated for a query which is empty?

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I'm paying a high price for the scheduling of my jobs and I'm saving a considerable amount by wrapping them in if(!someQuery.IsEmptyOrIgnore)... .ScheduleParallel(Dependency) - just wondering if this is going to trip me up for some reason?

bright sentinel Mar 20, 2021, 12:13 PM

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amber flicker I'm paying a high price for the scheduling of my jobs and I'm saving a considera...

Your jobs shouldn't be scheduled at all if there are no entities that matches the query.

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So it must be something else that's going on here

amber flicker Mar 20, 2021, 12:14 PM

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According to the profiler I think it still adds the types into the dependency chain

bright sentinel Mar 20, 2021, 12:14 PM

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Hmm, seems like a bug tbh

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But I don't think there's any issue in having that if-statement

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But I'd definitely report it as a bug

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An empty query really shouldn't have any overhead

amber flicker Mar 20, 2021, 12:16 PM

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yea.. bit surprised tbh but it's pretty dramatic - will post on the forums and see if I'm missing something

amber flicker Mar 20, 2021, 12:57 PM

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https://forum.unity.com/threads/using-query-isempty-to-reduce-scheduling-cost.1078688/

stable siren Mar 20, 2021, 3:22 PM

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I am trying to get entity component data onto a gameobject so I can display some relevant text. I have two gameobjects, one converts to an entity and one is just the gameobject that will be updated from the entity. I want to reference the entity but I am not sure what is the best way to do this?

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^ To reference the entity in a monobehaviour script that runs on the gameobject

zenith wyvern Mar 20, 2021, 4:17 PM

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Simplest way is World.DefaulyGameObjectInjectionWorld.EntityManager.GetSingletonEntity<CompData> inside Awake in the not converted script. Or if you want to to have your text easily respond to changes in your data you can do something like https://forum.unity.com/threads/dots-and-ui.1018159/#post-6598195

Unity Forum

Help Wanted - Dots and ui?

Hi,

i need to create an ui for my game, but now iam runnign into problems. I need to access gameobjects in systems apparentl and i feel there is no...

fluid kiln Mar 20, 2021, 4:40 PM

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On the same subject, what would be the best way to have a UI button event communicate with a system?

sturdy rune Mar 20, 2021, 4:44 PM

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it's not the best for answering you directly but thye have source code: https://forum.unity.com/threads/showcase-pure-dots-ui-system-detailed-description-feedback.688531/

Unity Forum

Feedback - [Showcase] Pure DOTS UI system (detailed description + f...

source code released: https://forum.unity.com/threads/source-code-dotsui-open-source-ui-project-for-dots.715880/

Motivation

The current Unity UI...

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has an event handler

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tight blade Mar 20, 2021, 4:46 PM

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Anyone know how to get a reference to a compute shader into a system?

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Like, I guess for game objects you'd make it a public field and then drag the shader it into that slot

stable siren Mar 20, 2021, 4:56 PM

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zenith wyvern Simplest way is `World.DefaulyGameObjectInjectionWorld.EntityManager.GetSingleto...

Ah ok thanks, I have tried that and I am getting this error. Sorry in advance when this is something stupid

zenith wyvern Mar 20, 2021, 4:57 PM

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Oh right GetSingleton is a query/system function. So you'd have to create a query from the entity manager and use GetSingleton from that

stable siren Mar 20, 2021, 5:07 PM

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zenith wyvern Oh right GetSingleton is a query/system function. So you'd have to create a quer...

I know this doesn't work but is this close?

zenith wyvern Mar 20, 2021, 5:08 PM

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https://docs.unity3d.com/Packages/com.unity.entities@0.17/api/Unity.Entities.EntityManager.CreateEntityQuery.html

acoustic spire Mar 20, 2021, 6:36 PM

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Is it possible to retrieve an array which contains all elements from all entities that have a specific dynamic buffer?
To avoid X-Y problem: I want to pass this array as a computebuffer to compute shader.

fluid kiln Mar 20, 2021, 6:47 PM

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Has anyone managed to use SceneSystem.LoadScene(guid)? I get Loading Entity Scene failed because the entity header file couldn't be resolved. This might be caused by a failed import of the entity scene. Please take a look at the SubScene MonoBehaviour that references this scene or at the asset import worker log in scenePath=Assets/Scenes/Test World/Test World guid=2ebf75e5a674adf44982871f7a38d189

ocean tundra Mar 20, 2021, 6:56 PM

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@fluid kiln I use the hash128 one

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Tho I guess that hash is basically a guid

fluid kiln Mar 20, 2021, 6:56 PM

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Yeah that's what I'm using

ocean tundra Mar 20, 2021, 6:56 PM

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And I use the get scene id from path first

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Weird

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I'm not doing anything special

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I'm not in a build yet tho

fluid kiln Mar 20, 2021, 6:57 PM

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I'll try with get scene id from path

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What I'm trying to do is weird cause I'm trying to make a menu in my MP game. But if I run the editor, it loads the current scene. So no way to test "entering in game"

ocean tundra Mar 20, 2021, 6:58 PM

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Using subscenes?

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I had to turn off auto load on the subscene

fluid kiln Mar 20, 2021, 6:58 PM

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My menu is a full scene

ocean tundra Mar 20, 2021, 6:58 PM

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And make sure the subscene is closed or something

fluid kiln Mar 20, 2021, 6:58 PM

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Should I use subscene instead?

ocean tundra Mar 20, 2021, 6:58 PM

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Not sure

fluid kiln Mar 20, 2021, 6:59 PM

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I feel like in DOTS it makes more sense to have only 1 scene so maybe that's that

ocean tundra Mar 20, 2021, 6:59 PM

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Basically I have the default world all setup normally

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I throw in a singleton entity and that triggers the start of my networking

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Opening the 'lobby' if your the host

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People connect then when host starts new world is created for client/server and I load the start scene

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That start scene actually should be a list of scenes and 1of them will be the game map

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I'll probably have a older normal unity scene for the UI and other stuff too

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And more subscenes for things like prefabs

fluid kiln Mar 20, 2021, 7:02 PM

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Yeah that makes more sense I'll try it out

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Thanks!

ocean tundra Mar 20, 2021, 7:33 PM

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@fluid kiln not sure if netcode let's you start networking in the default world

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It creates new server client worlds as soon as you start it I think

fluid kiln Mar 20, 2021, 7:35 PM

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Yeah it does :/

ocean tundra Mar 20, 2021, 7:37 PM

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You should be able to get a 'lobby' system working fine tho, as your gameplay systems won't run without entities

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Well maybe, I guess it depends on how your systems are setup

fluid kiln Mar 20, 2021, 7:38 PM

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It's just in the editor the problem. When I run I want the client to be on the main menu scene and the server to be on the game scene. But when I run it loads the opened scene on both. And I'm unable to change the scenes on the server

stable siren Mar 20, 2021, 8:03 PM

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I am trying to get an entity reference in a monobehaviour script but I am getting the following error:

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The entity does exist and the query is over components it contains. The only thing I can think of is that the monobehaviour awake() is called before the entity is created? It is created from a gameobject.

fluid kiln Mar 20, 2021, 8:04 PM

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Definitely that

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If not, make sure wherever you're using GetSingletonEntity from is in the same world as that entity

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Because when you think about it, for the conversion to happen, the GOs are created first.

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So awake probably comes before the entity

stable siren Mar 20, 2021, 8:05 PM

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Ok, do you know how I can fix that?

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Can i do some execution order thing?

fluid kiln Mar 20, 2021, 8:05 PM

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Well I think I would try not to use GetSingletonEntity from monobhavior

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Is it for UI?

stable siren Mar 20, 2021, 8:06 PM

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yeah to start with but then I want to use the gameobject for data visualiation

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I think that will be easier than using an entity

fluid kiln Mar 20, 2021, 8:07 PM

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You can turn your UI into a hybrid component, and have an Entity foreach query on it

stable siren Mar 20, 2021, 8:07 PM

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i am collecting stats onto a statistics entity and then just getting that data onto a gameobject

fluid kiln Mar 20, 2021, 8:07 PM

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To update it

stable siren Mar 20, 2021, 8:08 PM

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I think I need to be compatible with project tiny

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hybrid components aren't I don't think

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Oh I just put the getSingletonEntity stuff in LateUpdate and that worked!

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Thanks for the help 🙂

violet cosmos Mar 20, 2021, 8:29 PM

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Hi guys! Don't know if anyone remembers me, but I hope you're all staying sane 😉

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I was curious, if Unity has updated the Physics system to allow RaycastCommand to return more than one result yet? (ex: a ray that punches through multiple things)

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Last I checked in Nov, it only returned the first hit, and then stopped

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(pure Jobs, not ECS)

fluid kiln Mar 20, 2021, 8:42 PM

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Damn entities aren't named when you load a scene during runtime 😨

vivid lotus Mar 20, 2021, 8:50 PM

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Anyone know specifically what minimum set of components I need to manually add to an entity to make it work with the HybridRenderer?

fluid kiln Mar 20, 2021, 8:51 PM

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Can you check with a prefab or prespawned go?

vivid lotus Mar 20, 2021, 8:53 PM

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Not easily, it seems. There's a lot of components on there and I'm not sure they're all necessary.

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I need to make a renderable entity in code.

fluid kiln Mar 20, 2021, 8:54 PM

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At runtime, the Hybrid Renderer processes all entities that have LocalToWorld, RenderMesh and RenderBounds DOTS components. Many HDRP and URP features require their own material property components. These components are added during the MeshRenderer conversion. Processed entities are added to batches. Unity renders the batches using the SRP Batcher.

Note that if you add entities to your Scene at runtime, it is better to instantiate Prefabs than to create new entities from scratch. Prefabs are already converted to an optimal data layout during DOTS conversion, which results in improved performance. Converted prefabs also automatically contain all the necessary material property components for enabling all supported HDRP and URP features. As we are frequently adding new features to the hybrid renderer, we recommend using the conversion pipeline and prefabs instead of manually building entities from scratch, to avoid compatibility issues when updating to new hybrid renderer package versions.

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https://docs.unity3d.com/Packages/com.unity.rendering.hybrid@0.8/manual/index.html

vivid lotus Mar 20, 2021, 8:55 PM

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Thanks, I'll try that out.

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These components are added during the MeshRenderer conversion.

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Mm, that's what concerns me.

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Since I can't really do conversion in this case.

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At least, not with a huge amount of pain.

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Unless someone knows how a system can refer to a GameObject prefab in the project browser.

fluid kiln Mar 20, 2021, 8:58 PM

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You can have a singleton

vivid lotus Mar 20, 2021, 8:58 PM

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That has to be a created entity.

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There's a chicken and egg problem here where I need to know what entity to create to create it, but the only way I can know what entity to create is by creating an entity.

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Since there's no other way to get serialized data into a system.

fluid kiln Mar 20, 2021, 8:59 PM

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I'm not sure I'm following 100% but you can refer a gameobject prefab from the project browser by dragging it into an entity field of an component

vivid lotus Mar 20, 2021, 9:00 PM

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Right but I can't then refer to that component directly.

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Like, how does the system get to that prefab?

fluid kiln Mar 20, 2021, 9:01 PM

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So you have a component called PrefabHolder that has 1 field of type Entity. You add a GO in your hierarchy with that component and drag your prefab into the field. Then from any system you can call GetSingleton<PrefabHolder>().prefab

vivid lotus Mar 20, 2021, 9:02 PM

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That's... painful.

fluid kiln Mar 20, 2021, 9:02 PM

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Depends how many you need but it's not so different from good old oop unity

vivid lotus Mar 20, 2021, 9:02 PM

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In a normal MonoBehavior context I just point the MB to the prefab I want to spawn and spawn it.

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This has to form like a chain.

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Can that primordial entity be marked as a prefab? Like can you have it automatically get the Prefab component?

fluid kiln Mar 20, 2021, 9:03 PM

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If not maybe you can add an authorgin component that adds the Prefab component?

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Obviously your use case is much more complicated than anything I've done yet so idk if that's the best solution

ocean tundra Mar 20, 2021, 9:05 PM

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vivid lotus > These components are added during the MeshRenderer conversion.

There's a hybrid renderer helper method for runtime rendering entity creation

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It will handle setting all those components

vivid lotus Mar 20, 2021, 9:05 PM

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Happen to know what it is?

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Or where I can find it?

fluid kiln Mar 20, 2021, 9:05 PM

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🙌

ocean tundra Mar 20, 2021, 9:05 PM

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No sorry, it will be in the hybrid renderer stuff

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Oh docs were super clear

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https://docs.unity3d.com/Packages/com.unity.rendering.hybrid@0.11/manual/runtime-entity-creation.html

vivid lotus Mar 20, 2021, 9:06 PM

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Oh perfect, thanks.

ocean tundra Mar 20, 2021, 9:07 PM

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It's always a nice surprise when the docs have exactly what we want :p

vivid lotus Mar 20, 2021, 9:07 PM

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I really hope they figure out a way for systems to just be able to have serialized data.

ocean tundra Mar 20, 2021, 9:07 PM

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Singleton entitys is the plan I believe

vivid lotus Mar 20, 2021, 9:07 PM

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The whole "create an entity just to forcefeed a system the data it needs then destroy it" pattern is not pleasant to use and has a lot of code smell.

ocean tundra Mar 20, 2021, 9:08 PM

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Tho I agree, system only data can be useful

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What I did is have a Dependancy injection that would inject scriptable objects

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Worked very well but was too much effort to use

vivid lotus Mar 20, 2021, 9:13 PM

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Oh god.

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I can't even imagine trying to get systems to play with a ScriptableObject.

ocean tundra Mar 20, 2021, 9:19 PM

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Was pretty easy

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Used addressables to load the SO via a label

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Then was injected based on type

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Bit of reflection

vivid lotus Mar 20, 2021, 9:21 PM

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I'm sorry but the fact that all of that is necessary just to accomplish what [SerializeField] does for MonoBehaviours is crazy.

ocean tundra Mar 20, 2021, 9:21 PM

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But all that ended up being too many steps, each system that wanted data needed to create a SO (code) then in editor would create a asset of it, then needed to mark and configure addressables ... Was too much

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True but I perfer the systems being as they are, almost pure code

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So we can create and destroy them as we like

vivid lotus Mar 20, 2021, 9:22 PM

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They aren't though. Look at the HybridRenderer. It stores a ton of stateful data inside of it.

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And couldn't function efficiently without doing so.

ocean tundra Mar 20, 2021, 9:23 PM

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I'm heavy into muti worlds, and I even have a group of systems I dynamicly create for things

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Maybe there needs to be a "scriptable system"? Option

vivid lotus Mar 20, 2021, 9:23 PM

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If they were truly committed to having systems be completely pure they would be functions, not classes.

ocean tundra Mar 20, 2021, 9:24 PM

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Its a Separate option, exists as a asset so you can use the serialize field

vivid lotus Mar 20, 2021, 9:24 PM

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There's no reason for OnCreate, OnDestroy etc. to exist without systems being stateful.

ocean tundra Mar 20, 2021, 9:24 PM

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You could probably implement it now using ISystemBase

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Stateful is fine, it's connecting systems to unity 'stuff' that's painful

vivid lotus Mar 20, 2021, 9:25 PM

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Which, it shouldn't be.

ocean tundra Mar 20, 2021, 9:26 PM

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Yup

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But still early days

vivid lotus Mar 20, 2021, 9:26 PM

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I'm just gonna gripe about it on the forums I guess.

ocean tundra Mar 20, 2021, 9:26 PM

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:p

vivid lotus Mar 20, 2021, 9:26 PM

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Yeah

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Nothing else to really do about it.

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I keep bouncing between Unity ECS and bevy.

ocean tundra Mar 20, 2021, 9:26 PM

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Every update gets better, just it's slow

vivid lotus Mar 20, 2021, 9:27 PM

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Unity ECS has all the nice Unity things and a much more mature engine, but bevy has a much more sensible ECS system.

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No ideal world unfortunately.

ocean tundra Mar 20, 2021, 9:27 PM

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Nope

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But that's want you get with alpha software

vivid lotus Mar 20, 2021, 9:28 PM

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Yeah, so it goes. ECS is itself pretty new.

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At least in gamedev.

ocean tundra Mar 20, 2021, 9:28 PM

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Did you try the older versions :p soooo rough

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What we have now is amazing in comparison

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And by the time it 1.0's should be even better

north bay Mar 20, 2021, 9:29 PM

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Well they said they won't release 1.0 before it is as easy to use as monobehaviour so...

ocean tundra Mar 20, 2021, 9:29 PM

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Exactly

vivid lotus Mar 20, 2021, 9:30 PM

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That's... an ambitious goal at this rate.

ocean tundra Mar 20, 2021, 9:30 PM

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I struggle to think of use cases for unity data (assets) in a system tho

vivid lotus Mar 20, 2021, 9:31 PM

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Well, mine is I need to load textures and generate a quad for each sprite on it.

ocean tundra Mar 20, 2021, 9:31 PM

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Yea I remember now

vivid lotus Mar 20, 2021, 9:31 PM

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And store that in a library that I can then use for making entities.

ocean tundra Mar 20, 2021, 9:31 PM

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The rendering batch thing

vivid lotus Mar 20, 2021, 9:31 PM

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I stepped back from the rendering batch thing. I can actually use sprite entities now.

ocean tundra Mar 20, 2021, 9:31 PM

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Hybrid?

vivid lotus Mar 20, 2021, 9:31 PM

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The problem is generating a library of them at the right time (and that timing is very important).

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Hybrid renderer, yeah.

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It's complicated because my world space is double, not float, but someone gave me a very simple solution I wish I had thought of for that.

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Like I literally smacked my forehead when I read it.

ocean tundra Mar 20, 2021, 9:34 PM

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What was it?

vivid lotus Mar 20, 2021, 9:34 PM

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So I was going through this whole thing of having separate entities, one for the gameplay entity and one for the renderable sprite entity.

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And how that sucked because I had to link them all and eat all these cache misses copying data over between them.

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And then I looked into batching the gameplay entities and rendering them myself, and so on.

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But the suggestion I got, the "duh" one, was to just have both representations on the same entity.

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So each entity has its real double-sized game world position in a component, but also has the render transform and all the hybrid rendering data, and I just pass over each entity once per frame in a very easy-to-parallelize way with minimum possible cache misses and update the transform from the world position and the camera position to make it camera-relative in float precision.

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And then it's just down to culling, which I would have had to do anyway.

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You could do it with fixed point representation as well, or any really. It's probably the most efficient way to do it.

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Hence the forehead-smacking "why didn't I just think of that a week ago" moment.

stable siren Mar 20, 2021, 9:41 PM

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Is there a limit on the number of inputs of a foreach?

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ocean tundra Mar 20, 2021, 9:41 PM

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@stable siren yes

fluid kiln Mar 20, 2021, 9:41 PM

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6 irrc

stable siren Mar 20, 2021, 9:41 PM

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ah

ocean tundra Mar 20, 2021, 9:41 PM

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But you can make more

stable siren Mar 20, 2021, 9:42 PM

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how?

ocean tundra Mar 20, 2021, 9:42 PM

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Not sure but I've seen it in the docs

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Something about creating a delegate matching the parameters you want

stable siren Mar 20, 2021, 9:42 PM

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Ok, ill just do two foreach loops, its on the main thread anyway

ocean tundra Mar 20, 2021, 9:43 PM

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Smaller foreachs are better performance wise I think

fluid kiln Mar 20, 2021, 9:43 PM

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Usually if you have more than 6, you can split up your operations in smaller queries

stable siren Mar 20, 2021, 9:44 PM

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Actually that is weird cause in the screenshot I sent I think there are only 6

fluid kiln Mar 20, 2021, 9:44 PM

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I'm not sure if your WithAll counts

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Or maybe the limit is <6

stable siren Mar 20, 2021, 9:45 PM

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no it was the WithAll

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can have 6

zenith wyvern Mar 20, 2021, 9:46 PM

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You can use an IJobChunk or define a custom delegate

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https://docs.unity3d.com/Packages/com.unity.entities@0.17/manual/ecs_entities_foreach.html#custom-delegates

stable siren Mar 20, 2021, 9:48 PM

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is there an analogue to GetComponentData for buffers?

fluid kiln Mar 20, 2021, 9:49 PM

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Do you mean GetBuffer?

stable siren Mar 20, 2021, 9:50 PM

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oh yeh that is perfect thanks

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Does anyone know how to add EntityCache to the git ignore?

pliant pike Mar 20, 2021, 10:03 PM

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I don't suppose anyone knows of a good way to delay the running of a system?

fluid kiln Mar 20, 2021, 10:04 PM

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[DisableAutoCreation] ?

pliant pike Mar 20, 2021, 10:05 PM

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yeah I figured the only way was to manually do it from other external systems

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it doesn't matter that much I just wanted to see if I could cache some data in OnStartRunning, but it seems the Systems run before entities are converted and moved into the default world

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neh mind I was wrong, I can do that

fluid kiln Mar 20, 2021, 10:17 PM

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Am I stupid or is there no easy way to compare two float3s? It gives me a bool3 and there's no method .AllTrue

amber flicker Mar 20, 2021, 10:17 PM

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math.all / any

fluid kiln Mar 20, 2021, 10:18 PM

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Ha voilà

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Thanks

pliant pike Mar 20, 2021, 10:23 PM

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there's also equals I think

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float3.equals() or variable.equals()

fluid kiln Mar 20, 2021, 11:21 PM

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So you guys know how you can instantiate prefabs in NetCode and attach them to players. How do I go about populating these prefabs with player specific data and synchronizing this data across all clients?

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Simplest example is a component with player name

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The prefab doesn't know the player name at instantiation

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I wouldn't want to use a ghostfield for that right?

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RPC? Sounds finicky

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Unless GhostField is synchronized only on value change which would be super helpful but it's nowhere documented if it is

north bay Mar 20, 2021, 11:55 PM

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Dots Netcode only sends data around if it changes. And if it changes it compresses the data relative to a snapshots the client already has.

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Only for ghost fields, that isn't in any way related to rpcs

fluid kiln Mar 20, 2021, 11:57 PM

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Awesome that's what I was looking for. Although now I'm wondering about more complex data. Like say a player is a complex RPG character. The server saves into a database the class, race, stats, buffs, debuffs it had when it last logged out. Once it logs in, how do I stream this data to all client? Considering some of it is expressed through components rather than ghostable fields.

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(Buffs for example would probably be a dynamic buffer of entities)

north bay Mar 21, 2021, 12:01 AM

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The current implementation doesn't sync Add/Remove of components as far as I'm aware.
But you can add references to other ghosts on the Character.

Which is something that I personally do.
Where I have one Character which references a state machine (which is a ghost entity) based upon the 'role' the character has.

fluid kiln Mar 21, 2021, 12:02 AM

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So components with entity fields are synchronizable now?

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I guess I'm overthinking it, thanks for the guidance!

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I'll cross that bridge when I get there haha

north bay Mar 21, 2021, 12:04 AM

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You can mark the Entity value on a component as a GhostField which will sync the reference. This only works if the Entity is a ghost tho

fluid kiln Mar 21, 2021, 12:04 AM

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Gotchu, I didn't know that!

dark cypress Mar 21, 2021, 4:29 AM

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Why does this crash on the first line?

        protected override void OnUpdate()
        {
            var ecb = _barrier.AsParallelWriter();
            var typeIndex = _typeIndex;

            Dependency = Entities
                .WithName("AddSystemTag")
                .WithNone<AgentSQTypeSystemTag>()
                .WithAll<AgentTag>()
                .WithAll<SpatiallyQueryableTypeBE>()
                .ForEach((int entityInQueryIndex, Entity entity) =>
                {
                    ecb.AppendToBuffer(entityInQueryIndex, entity, new SpatiallyQueryableTypeBE()
                    {
                        value = typeIndex,
                    });
                    ecb.AddComponent<AgentSQTypeSystemTag>(entityInQueryIndex, entity);
                })
                .Schedule(Dependency);


            Dependency = Entities
                .WithName("RemoveSystemTag")
                .WithAll<AgentSQTypeSystemTag>()
                .WithNone<AgentTag>()
                .ForEach((int entityInQueryIndex, Entity entity, in DynamicBuffer<SpatiallyQueryableTypeBE> spatiallyQueryableTypeBuffer) =>
                {
                    ecb.RemoveComponent<AgentSQTypeSystemTag>(entityInQueryIndex, entity);
                    //removebuffer
                })
                .Schedule(Dependency);
        }

#

ocean tundra Mar 21, 2021, 4:30 AM

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@dark cypress where do you set _barrier?

dark cypress Mar 21, 2021, 4:31 AM

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This system is in that system group if that changes anything.

ocean tundra Mar 21, 2021, 4:31 AM

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Post update commands is old

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

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Your meant to use start/end systems now

deft stump Mar 21, 2021, 4:33 AM

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still no enable/disable components eh

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saaad

ocean tundra Mar 21, 2021, 4:34 AM

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Nope

low tangle Mar 21, 2021, 4:35 AM

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does a roadmap exist yet?

ocean tundra Mar 21, 2021, 4:36 AM

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Not that I've seen :(

low tangle Mar 21, 2021, 4:36 AM

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oof

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trying to get up to date on dots stuff, I'm stuck on 2019 for awhile

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how has it been on 2020/2021

zenith wyvern Mar 21, 2021, 4:38 AM

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Feels to me like there hasn't been too many major changes beyond the conversion system. More importantly though the editor is a lot faster now

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That's not necessarily related to dots but it's a good reason to update imo

low tangle Mar 21, 2021, 4:39 AM

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that must be nice lol

dark cypress Mar 21, 2021, 4:39 AM

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I've changed it to a separate command buffer system, but now it crashes with "Writing to the command buffer that's being written to elsewhere".
Shouldn't that be handled automatically by passing Dependency into the jobs?

low tangle Mar 21, 2021, 4:39 AM

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I have to wait on openxr maturity before I can even switch

dark cypress Mar 21, 2021, 4:39 AM

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            var ecb = _barrier.CreateCommandBuffer();
            var typeIndex = _typeIndex;

            Dependency = Entities
                .WithName("AddSystemTag")
                .WithNone<AgentSQTypeSystemTag>()
                .WithAll<AgentTag>()
                .WithAll<SpatiallyQueryableTypeBE>()
                .ForEach((Entity entity) =>
                {
                    ecb.AppendToBuffer(entity, new SpatiallyQueryableTypeBE()
                    {
                        value = typeIndex,
                    });
                    ecb.AddComponent<AgentSQTypeSystemTag>(entity);
                })
                .Schedule(Dependency);


            Dependency = Entities
                .WithName("RemoveSystemTag")
                .WithAll<AgentSQTypeSystemTag>()
                .WithNone<AgentTag>()
                .ForEach((Entity entity, in DynamicBuffer<SpatiallyQueryableTypeBE> spatiallyQueryableTypeBuffer) =>
                {
                    ecb.RemoveComponent<AgentSQTypeSystemTag>(entity);
                    //removebuffer
                })
                .Schedule(Dependency);

low tangle Mar 21, 2021, 4:40 AM

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iirc the auto job handle dependency shouldn't be written to, just used as a input job handle

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you might want to manually chain these two jobs, instead of dependency

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var job1 = Entities...Schedule(dependency)
var job2 = Entities...Schedule(job1)

zenith wyvern Mar 21, 2021, 4:41 AM

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The code they posted is already doing that

low tangle Mar 21, 2021, 4:41 AM

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its overwriting the struct

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which I dont trust the code generator to handle that right

zenith wyvern Mar 21, 2021, 4:41 AM

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But you don't need to, it would do that implicitly if you just exclude Dependency

low tangle Mar 21, 2021, 4:41 AM

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thats true

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still used to the old job system days I guess

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explicit > implicit for documentation reasons

zenith wyvern Mar 21, 2021, 4:43 AM

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True, it's nice to have a clear idea of what's going on if you're not already familiar with SystemBase

low tangle Mar 21, 2021, 4:44 AM

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systembase is nice, when you already know what its doing for you. but I always worry about new users getting used to the crutch

zenith wyvern Mar 21, 2021, 4:44 AM

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dark cypress I've changed it to a separate command buffer system, but now it crashes with "Wr...

Not sure what that error would be from but your previous example looks like a strange way to be using command buffers. Might be related to that if you're trying to do something other than what's shown in the docs examples

ocean tundra Mar 21, 2021, 4:44 AM

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@dark cypress read the doc again

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I think you need to add the job handle

low tangle Mar 21, 2021, 4:45 AM

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tbh reading the code, I'm not even sure what your doing

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looks like two distinct queries to add a type index then a tag component?

dark cypress Mar 21, 2021, 4:46 AM

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I'm just trying to implement a simple SystemStateComponent handling.

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Guess I'll go copy from the docs for that.

low tangle Mar 21, 2021, 4:50 AM

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oh systemstate component?

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I usually do two distinct systems, CreateXSystem and add the state and unique id there in one foreach

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then a DestroyXSystem that queries State, exclude everything else, and removes the component

dark cypress Mar 21, 2021, 5:15 AM

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low tangle I usually do two distinct systems, CreateXSystem and add the state and unique id...

Yeah, I'm trying to avoid system bloat. As I keep adding more and more, it just gets worse to manage.

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Related question. Can I combine 2 queries for "RequireForUpdate"?

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Like this.

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Seems to be working, but there's no proper way of doing it like EntityQuery.Combine, or something.

zenith wyvern Mar 21, 2021, 5:18 AM

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That looks like the proper way to me

dark cypress Mar 21, 2021, 5:20 AM

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It does, but I'm concerned, since I'm defining the query in 2 places(here and in the ForEach).
So I would've expected there to be a Combine method for queries, because ForEach can give you its query.

zenith wyvern Mar 21, 2021, 5:21 AM

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The query you get from WithStoreEntityQueryInField isn't a combined query though

dark cypress Mar 21, 2021, 5:23 AM

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That's what I'm saying. I wish there was a way to combine 2 queries that I get from the 2 ForEach's that are in this system, so that I don't have to define both of them in the OnCreate again.

zenith wyvern Mar 21, 2021, 5:24 AM

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WithStoreEntityQueryInField works during codegen, so you can use the queries it assigns inside OnCreate

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You shouldn't need to recreate them

dark cypress Mar 21, 2021, 5:26 AM

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If I do that, the system never runs.

            RequireForUpdate(_addQuery);
            RequireForUpdate(_removeQuery);

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Presumably because of the different ways it combines the queries, as they conflict with eachother.

zenith wyvern Mar 21, 2021, 5:29 AM

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I see what you mean, those are EntityQuery and not EntityQueryDesc

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Surely there's a way to get the EntityQueryDesc from the queries

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Hmm, I'm not seeing an obvious way from the api docs

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You might be stuck doing it the way you were. Once we're able to pass our own queries into a ForEach you could avoid recreating it that way

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Not sure there's a way right now though

low tangle Mar 21, 2021, 5:38 AM

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dark cypress Yeah, I'm trying to avoid system bloat. As I keep adding more and more, it just ...

I find personally system bloat is nothing to manage, if you just name them proper and use nested namespaces + folders to keep things isolated

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plus system state create/destroy systems are like 40 lines at most

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write once/forget till you need to modify

ocean tundra Mar 21, 2021, 7:57 AM

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Is there a way to find a existing system(s) via interface?

ocean tundra Mar 21, 2021, 8:27 AM

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Also can we have a System without OnUpdate?

shut hare Mar 21, 2021, 9:11 AM

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I have this simple system

    [DisableAutoCreation]
    public class DestroyDespawningSystem : SystemBase
    {
        EndSimulationEntityCommandBufferSystem system;

        protected override void OnCreate()
        {
            system = World.GetOrCreateSystem<EndSimulationEntityCommandBufferSystem>();
        }

        protected override void OnUpdate()
        {
            var ecb = system.CreateCommandBuffer();

            Entities.ForEach((Entity entity, in DespawningEntity despawningEntity) =>
            {
                ecb.DestroyEntity(entity);

            }).Run();
        }
    }
{

But it causes this log to pop up
"Internal: JobTempAlloc has allocations that are more than 4 frames old - this is not allowed and likely a leak"

Any ideas ?