[Solved] [Entities 1.0.0-pre.44] Baking problems | Official Unity Discord | Page 1

urban nebula Mar 13, 2023, 8:33 PM

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Hi, I am migrating my existing project to entities 1.0 and I am running into issues with the new baking workflow, I've got the following file StatisticComponentDataAuthoring.cs

using System.Collections;
using System.Collections.Generic;
using Unity.Entities;
using UnityEngine;

namespace Simulator.Statistics
{
    public struct StatisticComponentData : IComponentData
    {
        public long Step;
    }

    public class StatisticComponentDataAuthoring : MonoBehaviour
    {
        public long Step;
    }

    public class StatisticComponentDataBaker : Baker<StatisticComponentDataAuthoring>
    {
        public override void Bake(StatisticComponentDataAuthoring authoring)
        {
            var statistic = new StatisticComponentData
            {
                Step = authoring.Step
            };

            AddComponent(statistic);
        }
    }
}

And I want to use the created entity in a system like this:

        protected override void OnStartRunning()
        {
            base.OnStartRunning();
            _statisticEntity = SystemAPI.GetSingletonEntity<StatisticComponentData>();
        }

This is however giving me an error on runtime:

It just doesn't make sense to me at all.

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[Entities 1.0.0-pre.44] Baking problems

heady root Mar 13, 2023, 8:41 PM

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you have to wait for the scene to load before calling GetSingletonEntity

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you can RequireForupdate<StatisticComponentData>

urban nebula Mar 13, 2023, 8:44 PM

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Thank you so much

urban nebula Mar 13, 2023, 9:00 PM

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Alright now it is no longer throwing an exception but it seems to be not running anymore.. I've added a quick log statement to the OnUpdate of said system but no messages in the console :s

heady root Mar 13, 2023, 9:01 PM

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and the scene is actually loading? can you see the entities from it in the entities window?

urban nebula Mar 13, 2023, 9:02 PM

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Sorry but what is the entities window? The system shows up in the systems window

heady root Mar 13, 2023, 9:03 PM

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window ->entities -> components

urban nebula Mar 13, 2023, 9:04 PM

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Its there

heady root Mar 13, 2023, 9:05 PM

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that's pretty weird

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i can't actually see the image of the error message you posted originally, btw, because discord didn't work

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maybe you could click and hten highlight and paste instead?

urban nebula Mar 13, 2023, 9:06 PM

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using System;
using System.Collections.Generic;
using System.Linq;
using Simulator.Configuration;
using Simulator.Curves;
using Unity.Collections;
using Unity.Entities;
using UnityEngine;

namespace Simulator.Statistics
{

    public class Statistic
    {
        public EntityQuery Query;
        public string Name;
        public float Value;
        public Dictionary<string, object> StatisticBag = new Dictionary<string, object>();
        public Action<StatisticSystem, Statistic> Init;
        public Action<StatisticSystem, Statistic> PreAggregator;
        public Action<StatisticSystem, Statistic, Entity> Aggregator;
        public Action<StatisticSystem, Statistic> PostAggregator;
    }

    [UpdateInGroup(typeof(StatisticSystemGroup))]
    public partial class StatisticSystem : SystemBase
    {
        private SimulationConfigurationComponent _simulationConfiguration;

        private List<Statistic> _statistics = new List<Statistic>()
        {
            Metrics.StatisticStep,
            Metrics.AverageEnergy,
            Metrics.NumberOfBoids,
            Metrics.NumberOfFoodSources,
            Metrics.TotalFoodAvailable,
            Metrics.Polarization,
            Metrics.Expanse
        };

        private Entity _statisticEntity;
        private StatisticWriter _statisticWriter;

        // Please close your eyes before looking at the next 3 lines of code
        public new EntityQuery GetEntityQuery(params ComponentType[] componentTypes)
        {
            return base.GetEntityQuery(componentTypes);
        }

        protected override void OnCreate()
        {
            base.OnCreate();
            var id = DateTime.UtcNow.ToString("yyyy-MM-dd-HH-mm-ss");
            _statisticWriter = new StatisticWriter(id, _statistics.Select(s => s.Name).ToArray());

            RequireForUpdate<StatisticComponentData>();
        }

        protected override void OnStartRunning()
        {
            base.OnStartRunning();
            _simulationConfiguration = SystemAPI.GetSingleton<SimulationConfigurationComponent>();

            _statisticEntity = SystemAPI.GetSingletonEntity<StatisticComponentData>();

            // Init all statistics
            foreach (var statistic in _statistics)
            {
                statistic.Init?.Invoke(this, statistic);
            }
        }

        protected override void OnUpdate()
        {
            Debug.Log("StatisticSystem.OnUpdate()");
            // Pre-aggregator
            foreach (var statistic in _statistics)
            {
                statistic.PreAggregator?.Invoke(this, statistic);
            }


            // Aggregator
            foreach (var statistic in _statistics)
            {
                var query = statistic.Query;
                var aggregator = statistic.Aggregator;
                var entities = query.ToEntityArray(Allocator.TempJob);
                foreach (var entity in entities)
                {
                    aggregator?.Invoke(this, statistic, entity);
                }
                entities.Dispose();
            }

            // Post-aggregator
            foreach (var statistic in _statistics)
            {
                statistic.PostAggregator?.Invoke(this, statistic);
            }

            // Create list of all statistic values
            var values = new List<float>();
            foreach (var statistic in _statistics)
            {
                values.Add(statistic.Value);
            }

            _statisticWriter.Write(values.Select(x => x.ToString()).ToArray());

            var step = EntityManager.GetComponentData<StatisticComponentData>(_statisticEntity).Step;
            EntityManager.SetComponentData(_statisticEntity, new StatisticComponentData { Step = step + (long)_simulationConfiguration.MaxSimulationSpeed });
        }
    }
}

This is the full class

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Alright, 2 seconds.

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The error is gone now by the way, but ill get it back

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InvalidOperationException: GetSingleton<Simulator.Configuration.SimulationConfigurationComponent>() requires that exactly one Simulator.Configuration.SimulationConfigurationComponent exist that match this query, but there are 0.
Unity.Entities.EntityQueryImpl.GetSingleton[T] () (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/Iterators/EntityQuery.cs:1447)
Unity.Entities.EntityQuery.GetSingleton[T] () (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/Iterators/EntityQuery.cs:2657)
Simulator.Statistics.StatisticSystem.OnStartRunning () (at Assets/Scripts/Statistics/StatisticSystem.cs:62)
Unity.Entities.SystemBase.Update () (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/SystemBase.cs:415)
Unity.Entities.ComponentSystemGroup.UpdateAllSystems () (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/ComponentSystemGroup.cs:703)
UnityEngine.Debug:LogException(Exception)
Unity.Debug:LogException(Exception) (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/Stubs/Unity/Debug.cs:19)
Unity.Entities.ComponentSystemGroup:UpdateAllSystems() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/ComponentSystemGroup.cs:708)
Unity.Entities.ComponentSystemGroup:OnUpdate() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/ComponentSystemGroup.cs:667)
Unity.Entities.SystemBase:Update() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/SystemBase.cs:418)
Unity.Entities.ComponentSystemGroup:UpdateAllSystems() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/ComponentSystemGroup.cs:703)
Unity.Entities.ComponentSystemGroup:OnUpdate() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/ComponentSystemGroup.cs:661)
Unity.Entities.SystemBase:Update() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/SystemBase.cs:418)
Unity.Entities.DummyDelegateWrapper:TriggerUpdate() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/ScriptBehaviourUpdateOrder.cs:526)

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If I switch the following lines in the file:

_simulationConfiguration = SystemAPI.GetSingleton<SimulationConfigurationComponent>();

_statisticEntity = SystemAPI.GetSingletonEntity<StatisticComponentData>();

I get a slightly different stacktrace

InvalidOperationException: GetSingleton() requires that exactly one entity exists that matches this query, but there are 0.
Unity.Entities.EntityQueryImpl.GetSingletonChunk (Unity.Entities.TypeIndex typeIndex, System.Int32& outIndexInArchetype, Unity.Entities.Chunk*& outChunk) (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/Iterators/EntityQuery.cs:1349)
Unity.Entities.EntityQueryImpl.GetSingletonEntity () (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/Iterators/EntityQuery.cs:1297)
Unity.Entities.EntityQuery.GetSingletonEntity () (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/Iterators/EntityQuery.cs:2641)
Simulator.Statistics.StatisticSystem.OnStartRunning () (at Assets/Scripts/Statistics/StatisticSystem.cs:63)
Unity.Entities.SystemBase.Update () (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/SystemBase.cs:415)
Unity.Entities.ComponentSystemGroup.UpdateAllSystems () (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/ComponentSystemGroup.cs:703)
UnityEngine.Debug:LogException(Exception)
Unity.Debug:LogException(Exception) (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/Stubs/Unity/Debug.cs:19)
Unity.Entities.ComponentSystemGroup:UpdateAllSystems() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/ComponentSystemGroup.cs:708)
Unity.Entities.ComponentSystemGroup:OnUpdate() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/ComponentSystemGroup.cs:667)
Unity.Entities.SystemBase:Update() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/SystemBase.cs:418)
Unity.Entities.ComponentSystemGroup:UpdateAllSystems() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/ComponentSystemGroup.cs:703)
Unity.Entities.ComponentSystemGroup:OnUpdate() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/ComponentSystemGroup.cs:661)
Unity.Entities.SystemBase:Update() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/SystemBase.cs:418)
Unity.Entities.DummyDelegateWrapper:TriggerUpdate() (at ./Library/PackageCache/com.unity.entities@1.0.0-pre.44/Unity.Entities/ScriptBehaviourUpdateOrder.cs:526)

heady root Mar 13, 2023, 9:10 PM

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i wonder if you actually have more than one

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for example is that thing maybe on a prefab or something

urban nebula Mar 13, 2023, 9:11 PM

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It is not on a prefab

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Just a plain Gameobject

heady root Mar 13, 2023, 9:11 PM

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if you click on it in the component window iirc you get a list of entities it's on

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yeah click, and then in the inspector go to Relationships

urban nebula Mar 13, 2023, 9:12 PM

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Says its on 0 entities

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heady root Mar 13, 2023, 9:13 PM

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well that's good actually

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means the error is correct

urban nebula Mar 13, 2023, 9:13 PM

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Also makes sense that the system isnt updating 😂

heady root Mar 13, 2023, 9:13 PM

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yeah

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do you actually have the authoring on a gameobject in the subscene?

urban nebula Mar 13, 2023, 9:15 PM

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I think so, that would be this right?

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heady root Mar 13, 2023, 9:15 PM

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no

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that authoring component

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does that gameobject live in a subscene?

urban nebula Mar 13, 2023, 9:16 PM

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I dont think it does, it just lives in the scene root

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I don't quite know what subscenes are to be honest, Ill go look it up

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Hierarchy looks like this

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If that helps

heady root Mar 13, 2023, 9:17 PM

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ah

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subscenes are the only time that authoring components get baked into entity components

urban nebula Mar 13, 2023, 9:18 PM

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Oh okay

heady root Mar 13, 2023, 9:18 PM

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you may enjoy https://github.com/Unity-Technologies/EntityComponentSystemSamples

GitHub

GitHub - Unity-Technologies/EntityComponentSystemSamples

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

urban nebula Mar 13, 2023, 9:19 PM

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Ill have a look at that, thank you =)

urban nebula Mar 13, 2023, 9:27 PM

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heady root subscenes are the only time that authoring components get baked into entity comp...

Do you maybe have a docs link or something that I could look at such that I could find information like this in the future myself?

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Or did I just miss it in the baker docs

heady root Mar 13, 2023, 9:28 PM

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i think you just stopped reading after Convert data with Baking

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since the next section is Subscenes

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that said, we should scream more loudly that you will not get anything converted whatsoever if you don't put your crap in a subscene

urban nebula Mar 13, 2023, 9:32 PM

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Yeah probably, I mean subscenes sounds like something I would need if I wanted to make something big and im only really building a POC

grizzled sigil Mar 13, 2023, 9:46 PM

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Kind of needed if you're making anything as you can't bake any other way

urban nebula Mar 14, 2023, 7:43 PM

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To follow up on this - In previous versions it seemed to be fine to spawn entities from the Start() function in a monobehaviour, this seems broken now - I'd probably have to go for a system which does it instead right?

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I assume that this has to do with the "waiting for a scene to load" thing

heady root Mar 14, 2023, 8:07 PM

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i'm not as sure about that; what breaks about it?

urban nebula Mar 14, 2023, 8:20 PM

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I see that in the boids sample they create the boids in a system build specifically for that - I was doing it in the start function of a monobehaviour used to work before, broken now

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I was basically creating a prototype and then instantiating it multiple times

grizzled sigil Mar 14, 2023, 8:23 PM

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are you trying to instantiate from an entity within a subscene?

urban nebula Mar 14, 2023, 8:23 PM

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Not from an entity from a regular monobehaviour

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both are in the same subscene

grizzled sigil Mar 14, 2023, 8:24 PM

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I'm confused then

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Gameobjects in subscenes are converted to entities

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They no longer exist at runtime*

urban nebula Mar 14, 2023, 8:24 PM

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I have not written a custom baker or anything for it

grizzled sigil Mar 14, 2023, 8:24 PM

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if it's in a subscene, the gameobject doesn't exist at runtime*

urban nebula Mar 14, 2023, 8:24 PM

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grizzled sigil They no longer exist at runtime*

Ah, this solves another issue for me

grizzled sigil Mar 14, 2023, 8:25 PM

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(* is because there is this whole companion thing for certain types but I'm just going to ignore that for this convo)

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Any gameobject put in a subscene will be converted to an entity, at bare minimum just its transform

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If you put components on it that aren't converted, they will just be ignored

urban nebula Mar 14, 2023, 8:34 PM

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Alright so my issue was that I put my monobehaviour into a subscene, which then converted it to an entity and I guess that it didnt fire the regular monobehaviour events anymore

grizzled sigil Mar 14, 2023, 8:34 PM

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Correct!

urban nebula Mar 14, 2023, 8:34 PM

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so it was never executing the boid spawning portion, I've now moved to the root of the scene and it seems to fire again

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The entities exist now, they just dont seem to show up visually in the editor, probably some issue with the material or mesh or something

grizzled sigil Mar 14, 2023, 8:35 PM

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in game or scene?

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or both?

urban nebula Mar 14, 2023, 8:35 PM

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Both

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I can see them in the entities inspector though

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Probably going to have to read up on the graphics package, something must have changed

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this upgrade sure is taking a lot of time though

grizzled sigil Mar 14, 2023, 8:45 PM

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take peace in the knowledge that at least when you're done, you'll have a more stable API going forward

urban nebula Mar 14, 2023, 9:01 PM

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Got it to work, was missing a parameter in RenderMeshUtilities.AddComponents: MaterialMeshInfo materialMeshInfo even though it has a default parameter, I had to set it to MaterialMeshInfo.FromRenderMeshArrayIndices(0, 0) which seems like a default parameter to me anyway

#[Solved] [Entities 1.0.0-pre.44] Baking problems