blob not adding to entity correctly | Official Unity Discord | Page 1

somber solstice Feb 4, 2025, 8:10 PM

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there are no inspectors for blobs

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if you see the serialized hash not 0 then it's been added

scarlet glade Feb 4, 2025, 8:11 PM

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oh shoot i must have misread something online

somber solstice Feb 4, 2025, 8:11 PM

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you can expose them in the inspector if you want

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using [CreateProperty] on properties within the component

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pointing into the blob

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OR you can give yourself internal access to entities and write a proper inspector

scarlet glade Feb 4, 2025, 8:13 PM

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somber solstice OR you can give yourself internal access to entities and write a proper inspecto...

im trying to use the blob tho in a system and its giving me this massive error every frame NullReferenceException: System.NullReferenceException: The BlobAssetReference is null. This Exception was thrown from a function compiled with Burst, which has limited exception support. 0x00007ffde847028e (Unity) burst_abort 0x00007ffe6494a53e (38bfef227552d435ff94a9ee9b8239d) burst_Abort_Trampoline 0x00007ffe648d3176 (38bfef227552d435ff94a9ee9b8239d) EnemySpawnerSystem.OnUpdate (at C:/Users/cnorw/OneDrive/Documents/GitHub/ECSAssessment/Assets/ECS Scripts/Systems/EnemySpawnerSystem.cs:26) 0x00007ffe648d1080 (38bfef227552d435ff94a9ee9b8239d) 13a12ce769b3aad50874ae63d36c2b60 0x00007ffe779d4b4d (030567238df8ff6ea909a1125c30263) Unity.Entities.WorldUnmanagedImpl.Unity.Entities.UnmanagedUpdate_0000164F$BurstDirectCall.Invoke (at C:/Users/cnorw/OneDrive/Documents/GitHub/ECSAssessment/Library/PackageCache/com.unity.burst@616862665d8c/.Runtime/unknown/unknown:0) 0x00007ffe779d3449 (030567238df8ff6ea909a1125c30263) 7bf3b3dc1c88cb657fd69b548232391d 0x0000020e7f6b48e0 (Mono JIT Code) (wrapper managed-to-native) Unity.Entities.WorldUnmanagedImpl/Unity.Entities.UnmanagedUpdate_0000164F$BurstDirectCall:wrapper_native_indirect_00000210B3C32858 (intptr&,void*) 0x0000020e7f6b4313 (Mono JIT Code) Unity.Entities.WorldUnmanagedImpl/Unity.Entities.UnmanagedUpdate_0000164F$BurstDirectCall:Invoke (void*) 0x0000020e7f6b427b (Mono JIT Code) Unity.Entities.WorldUnmanagedImpl:UnmanagedUpdate (void*) (at ./Library/PackageCache/com.unity.entities@1eebe0437e56/Unity.Entities/WorldUnmanaged.cs:828) 0x0000020e7f6b3e8b (Mono JIT Code) Unity.Entities.WorldUnmanagedImpl:UpdateSystem (Unity.Entities.SystemHandle) (at ./Library/PackageCache/com.unity.entities@1eebe0437e56/Unity.Entities/WorldUnmanaged.cs:892) 0x0000020e7f66f8d3 (Mono JIT Code)

its way longer than that but i dont have enough characters

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using Unity.Transforms;

[BurstCompile]
public partial struct EnemySpawnerSystem : ISystem
{
    int spawnIndicator;

    [BurstCompile]
    public void OnCreate(ref SystemState state)
    {
        state.RequireForUpdate<EnemySpawnerComponent>();
        spawnIndicator = 1;
    }

    [BurstCompile]
    public void OnUpdate(ref SystemState state)
    {
        TypeDatabaseComponent typeDatabaseComponent = SystemAPI.GetSingleton<TypeDatabaseComponent>();
        ref TypeDatabaseBlob typeDatabase = ref typeDatabaseComponent.TypeDatabase.Value;

        foreach (RefRW<EnemySpawnerComponent> spawner in SystemAPI.Query<RefRW<EnemySpawnerComponent>>())
        {
            BlobAssetReference<WaveBlob> waveBlob = spawner.ValueRO.currentWaveData;

            spawner.ValueRW.Timer += SystemAPI.Time.DeltaTime;

            if (spawner.ValueRO.Timer < waveBlob.Value.spawns[spawnIndicator].timeSinceLastSpawn)
            {
                continue;
            }

            spawnIndicator++;

            if(waveBlob.Value.spawns[spawnIndicator].isCluster)
            {

            }
            else
            {
                spawnIndicator++;
                Entity newEnemy = state.EntityManager.Instantiate(spawner.ValueRO.PrefabToSpawn);

                LocalTransform newLT = LocalTransform.FromPosition(spawner.ValueRO.SpawnPosition);

                TypeBlob enemyType = typeDatabase.Types[waveBlob.Value.spawns[spawnIndicator].spawnId];

                ApplyEnemyStats(ref state, ref newEnemy, waveBlob.Value.spawns[spawnIndicator], enemyType);

                spawner.ValueRW.Timer = 0f;
            }
        }
    }```

thats the system

somber solstice Feb 4, 2025, 8:15 PM

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i'd check the lenth of spawns first

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what line is 26

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but it does look like this particular blob might not be setup

scarlet glade Feb 4, 2025, 8:21 PM

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somber solstice but it does look like this particular blob might not be setup

im an idiot was using the wrong wave component data ok now it has spawns its not throwing me errors every frame justthis one NullReferenceException: System.NullReferenceException: The BlobAssetReference is null. This Exception was thrown from a function compiled with Burst, which has limited exception support. 0x00007ffde847028e (Unity) burst_abort

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so the system isnt finding the blob or it isnt setup

somber solstice Feb 4, 2025, 8:22 PM

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        ref TypeDatabaseBlob typeDatabase = ref typeDatabaseComponent.TypeDatabase.Value;```

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is this this?

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is this being baked?

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because subscenes take time to load so won't exist on first frame

scarlet glade Feb 4, 2025, 8:24 PM

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it is either that or the wave data

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its not being baked but the system gets put on an entity from the on create method ```public partial struct TypeDatabaseSystem : ISystem
{
public void OnCreate(ref SystemState state)
{
TypeSO[] allTypes = Resources.LoadAll<TypeSO>("");

    using BlobBuilder builder = new BlobBuilder(Allocator.Temp);
    ref TypeDatabaseBlob typeDatabase = ref builder.ConstructRoot<TypeDatabaseBlob>();

    BlobBuilderArray<TypeBlob> typesArray = builder.Allocate(ref typeDatabase.Types, allTypes.Length);

    for (int i = 0; i < allTypes.Length; i++)
    {
        typesArray[i] = new TypeBlob
        {
            id = allTypes[i].id,
            health = allTypes[i].health,
            speed = allTypes[i].speed,
            damage = allTypes[i].damage
        };
    }

    BlobAssetReference<TypeDatabaseBlob> blobAsset = builder.CreateBlobAssetReference<TypeDatabaseBlob>(Allocator.Persistent);

    Entity entity = state.EntityManager.CreateEntity();
    state.EntityManager.AddComponentData(entity, new TypeDatabaseComponent { TypeDatabase = blobAsset });
}

}```

somber solstice Feb 4, 2025, 8:25 PM

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ok create method would be fine

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can you just turn off burst to find exactly the issue?

scarlet glade Feb 4, 2025, 8:26 PM

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yeah good idea

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Unity.Entities.BlobAssetReferenceData.ThrowIfNull () (at ./Library/PackageCache/com.unity.entities@1eebe0437e56/Unity.Entities/Blobs.cs:293)
Unity.Entities.BlobAssetReferenceData.ValidateNotNull () (at ./Library/PackageCache/com.unity.entities@1eebe0437e56/Unity.Entities/Blobs.cs:282)
Unity.Entities.BlobAssetReference`1[T].get_Value () (at ./Library/PackageCache/com.unity.entities@1eebe0437e56/Unity.Entities/Blobs.cs:448)
EnemySpawnerSystem.OnUpdate (Unity.Entities.SystemState& state) (at Assets/ECS Scripts/Systems/EnemySpawnerSystem.cs:32)
EnemySpawnerSystem.__codegen__OnUpdate (System.IntPtr self, System.IntPtr state) (at <39179709c8314d6db5e874ba81771ba8>:0)
Unity.Entities.SystemBaseRegistry+<>c__DisplayClass9_0.<SelectBurstFn>b__0 (System.IntPtr system, System.IntPtr state) (at ./Library/PackageCache/com.unity.entities@1eebe0437e56/Unity.Entities/SystemBaseRegistry.cs:249)
UnityEngine.Debug:LogException(Exception)
Unity.Debug:LogException(Exception) (at ./Library/PackageCache/com.unity.entities@1eebe0437e56/Unity.Entities/Stubs/Unity/Debug.cs:17)
Unity.Entities.<>c__DisplayClass9_0:<SelectBurstFn>b__0(IntPtr, IntPtr) (at ./Library/PackageCache/com.unity.entities@1eebe0437e56/Unity.Entities/SystemBaseRegistry.cs:253)
Unity.Entities.UnmanagedUpdate_0000164F$BurstDirectCall:wrapper_native_indirect_000002109E07C2F8(IntPtr&, Void*)
Unity.Entities.UnmanagedUpdate_0000164F$BurstDirectCall:Invoke(Void*)
Unity.Entities.WorldUnmanagedImpl:UnmanagedUpdate(Void*) (at ./Library/PackageCache/com.unity.entities@1eebe0437e56/Unity.Entities/WorldUnmanaged.cs:825)
Unity.Entities.WorldUnmanagedImpl:UpdateSystem(SystemHandle) (at ./Library/PackageCache/com.unity.entities@1eebe0437e56/Unity.Entities/WorldUnmanaged.cs:891)
Unity.Entities.ComponentSystemGroup:UpdateAllSystems() (at ./Library/PackageCache/com.unity.entities@1eebe0437e56/

thats the area with burst turned off

somber solstice Feb 4, 2025, 8:33 PM

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what line is that

scarlet glade Feb 4, 2025, 8:35 PM

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            {
                continue;
            }```
pretty sure its that

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which means its not reading wave blob correctly

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BlobAssetReference<WaveBlob> waveBlob = spawner.ValueRO.currentWaveData;

so this must not be set up correctly#

somber solstice Feb 4, 2025, 8:38 PM

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can you post the waveblob authoring code again

scarlet glade Feb 4, 2025, 8:38 PM

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yeah sure

somber solstice Feb 4, 2025, 8:38 PM

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you said something was spawning but still erroring right?

scarlet glade Feb 4, 2025, 8:38 PM

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public class WaveBaker : Baker<WaveAuthoring>
{
    public override void Bake(WaveAuthoring authoring)
    {
        Entity entity = GetEntity(TransformUsageFlags.None);

        using BlobBuilder builder = new BlobBuilder(Allocator.Temp);
        ref WaveBlob waveBlob = ref builder.ConstructRoot<WaveBlob>();

        BlobBuilderArray<SpawnDataBlob> spawns = builder.Allocate(ref waveBlob.spawns, authoring.waveData.spawns.Length);

        for (int i = 0; i < authoring.waveData.spawns.Length; i++)
        {
            spawns[i] = new SpawnDataBlob
            {
                isCluster = authoring.waveData.spawns[i].isCluster,
                spawnId = authoring.waveData.spawns[i].spawnId,
                timeSinceLastSpawn = authoring.waveData.spawns[i].timeSinceLastSpawn,
                populationThresholdTrigger = authoring.waveData.spawns[i].populationThresholdTrigger
            };
        }

        BlobAssetReference<WaveBlob> blobAsset = builder.CreateBlobAssetReference<WaveBlob>(Allocator.Persistent);

        AddBlobAsset(ref blobAsset, out _);
        AddComponent(entity, new WaveComponent { WaveData = blobAsset });
        Debug.Log("baking complete");
    }
}```

somber solstice Feb 4, 2025, 8:38 PM

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which seems to imply to me that at least some waveblob has been setup right

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but there is somehow an extra waveblob in the world that hasn't been

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actually if you go to entity hierarchy

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and put in

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c=EnemySpawnerComponent

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how many are athere?

scarlet glade Feb 4, 2025, 8:39 PM

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ill check now

somber solstice Feb 4, 2025, 8:40 PM

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hang on

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you posted the code for waveauthoring setting up WaveComponent

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foreach (RefRW<EnemySpawnerComponent> spawner in SystemAPI.Query<RefRW<EnemySpawnerComponent>>())
{
BlobAssetReference<WaveBlob> waveBlob = spawner.ValueRO.currentWaveData;

but your job is reading EnemySpawnerComponent

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not WaveComponent

scarlet glade Feb 4, 2025, 8:41 PM

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yeah so for every enemy spawner in the world i can add the blob to it for reference

scarlet glade Feb 4, 2025, 8:41 PM

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somber solstice how many are athere?

apparently none

somber solstice Feb 4, 2025, 8:41 PM

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yea i edited the message

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not looking for waveblob

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you're looking for EnemySpawnerComponent

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but you also haven't posted code where EnemySpawnerComponent is setup

scarlet glade Feb 4, 2025, 8:42 PM

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oh sorry ill do that noe

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using UnityEngine;

public class EnemySpawnerAuthoring : MonoBehaviour
{
    public GameObject PrefabToSpawn;
    public float SpawnDelay;

    private class EnemySpawnerBaker : Baker<EnemySpawnerAuthoring>
    {
        public override void Bake(EnemySpawnerAuthoring authoring)
        {
            Entity e = GetEntity(TransformUsageFlags.None);

            AddComponent(e, new EnemySpawnerComponent
            {
                PrefabToSpawn = GetEntity(authoring.PrefabToSpawn, TransformUsageFlags.Dynamic),
                Timer = 0.0f,
                SpawnDelay = authoring.SpawnDelay,
                SpawnPosition = authoring.transform.position
            });
        }
    }
}```

somber solstice Feb 4, 2025, 8:43 PM

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so where is currentWaveData being setup

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in that baker?

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you just don't seem to have assigned the blob at all

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or am i missing something

scarlet glade Feb 4, 2025, 8:45 PM

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its setup as a scriptable object called WaveSO which is assigned in the wave authoring ```using UnityEngine;

public class WaveAuthoring : MonoBehaviour
{
public WaveSO waveData;
}```

and then im trying to turn that to a blob in wave baker

somber solstice Feb 4, 2025, 8:46 PM

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       foreach (RefRW<EnemySpawnerComponent> spawner in SystemAPI.Query<RefRW<EnemySpawnerComponent>>())
        {
            BlobAssetReference<WaveBlob> waveBlob = spawner.ValueRO.currentWaveData;
            if (spawner.ValueRO.Timer < waveBlob.Value.spawns[spawnIndicator].timeSinceLastSpawn)

you're reading
EnemySpawnerComponent.currentWaveData
but no where in your EnemySpawnerAuthoring is this being set?

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so where is it being set

scarlet glade Feb 4, 2025, 8:47 PM

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using Unity.Mathematics;

public struct EnemySpawnerComponent : IComponentData
{
    public Entity PrefabToSpawn;

    public float Timer;

    public float SpawnDelay;

    public float3 SpawnPosition;

    public BlobAssetReference<WaveBlob> currentWaveData;
}```

its declared on the component then im trying to set up where you just showed

somber solstice Feb 4, 2025, 8:47 PM

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but you're reading from it

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if (spawner.ValueRO.Timer < waveBlob.Value.spawns[spawnIndicator].timeSinceLastSpawn)

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before you create it

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waveBlob.Value
is not created

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as the error says

scarlet glade Feb 4, 2025, 8:48 PM

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i thought bake happened before compile time?

somber solstice Feb 4, 2025, 8:48 PM

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but you haven't baked it

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where is it baked

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the code you have posted has not baked this

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            AddComponent(e, new EnemySpawnerComponent
            {
                PrefabToSpawn = GetEntity(authoring.PrefabToSpawn, TransformUsageFlags.Dynamic),
                Timer = 0.0f,
                SpawnDelay = authoring.SpawnDelay,
                SpawnPosition = authoring.transform.position,
                currentWaveData = null, // <---------------------- this is what you're saying
            });```

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you have not written this value

scarlet glade Feb 4, 2025, 8:49 PM

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oh i see

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but in order to set it correctly the wave must bake before that bakes

somber solstice Feb 4, 2025, 8:57 PM

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bakers run simultaneously

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you can't depend on 1 baker to run before another

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if you need to combine multiple bakers you need to write a baking system

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but really this blob should jsut be setup in the EnemySpawnerAuthoring baker

#blob not adding to entity correctly