Use case
I have :
- A baker creating a Map
- A baker creating an additionnal entity referencing the Map (PrimaryEntity)
- This additionnal entity have string metadata to load the map
Issue
At first, when I was using a single string metadata in my IComponentData, everything as fine, in the system the reference to the Entity is working as expected:
BUT after I added a second string to a class IComponentData, at runtime, the entity referenced is completly messed up, is this exemple the entity is a System instance AND NOT the Cube entity:
(screen shots based on code below):
How to reproduce
-
Create a new scene with an empty subscene
-
Add a new Cube to the subscene
-
Add the DebugWrongEntityAuthoringComponent component to the cube
using Unity.Entities;
using UnityEngine;
[DisallowMultipleComponent]
public class DebugWrongEntityAuthoringComponent : MonoBehaviour
{
public class Baker : Baker<DebugWrongEntityAuthoringComponent>
{
public override void Bake(DebugWrongEntityAuthoringComponent authoring)
{
AddBuffer<MapData>();
var mapEntity = GetEntity();
var extraWorkingEntity = CreateAdditionalEntity();
AddComponentObject(extraWorkingEntity, new LoadMyMapWorking { MyMap = mapEntity });
var extraBuggyEntity = CreateAdditionalEntity();
AddComponentObject(extraBuggyEntity, new LoadMyMapBuggy { MyMap = mapEntity });
}
}
}
public struct MapData : IBufferElementData
{
public int DummyData;
}
public class LoadMyMapWorking : IComponentData
{
public Entity MyMap;
public string StringData1;
}
public class LoadMyMapBuggy : IComponentData
{
public Entity MyMap;
public string StringData1;
public string StringData2;
}
[RequireMatchingQueriesForUpdate]
public partial class LoadMyMapSystem : SystemBase
{
protected override void OnUpdate()
{
var ecb = this.GetSingleton<EndSimulationEntityCommandBufferSystem.Singleton>().CreateCommandBuffer(World.Unmanaged);
var getBuffer = GetBufferLookup<MapData>(isReadOnly: false);
Entities
.WithoutBurst()
.ForEach((LoadMyMapWorking loadMyMap, in Entity loadEntity) =>
{
ecb.DestroyEntity(loadEntity);
var myData = getBuffer[loadMyMap.MyMap];
myData.Add(new MapData());
Debug.Log("LoadMyMapWorking.MyMap is working as expected");
})
.Run();
Entities
.WithoutBurst()
.ForEach((LoadMyMapBuggy loadMyMap, in Entity loadEntity) =>
{
ecb.DestroyEntity(loadEntity);
try
{
var myData = getBuffer[loadMyMap.MyMap];
myData.Add(new MapData());
}
catch (System.Exception e)
{
// Oopsy!! :
// A component with type:MapData[Buffer] has not been added to the entity.Entities Journaling may be able to help determine more information.
// Please enable Entities Journaling for a more helpful error message.
Debug.LogError("LoadMyMapBuggy.MyMap is NOT working as expected: ");
Debug.LogError(e.Message);
}
})
.Run();
}
}
Context
Unity Version:
2022.2.0b14.112.4874
Packages versions