DOTS: Odd error, cannot find ANY ref: Unity.Rendering.LightMaps.CopyToTextureArray

I have the following script to convert child objects to entities:

Code (CSharp):

1. using Unity.Entities;
2. using UnityEngine;
3.  
4. public class GameObjectToEntityConversion : MonoBehaviour
5. {
6.     private EntityManager entityManager;
7.     private GameObjectConversionSettings conversionSettings;
8.  
9.     void Start()
10.     {
11.         entityManager = World.DefaultGameObjectInjectionWorld.EntityManager;
12.         conversionSettings = GameObjectConversionSettings.FromWorld(World.DefaultGameObjectInjectionWorld, new BlobAssetStore());
13.  
14.         ConvertChildren(this.transform);
15.  
16.         Cleanup();
17.     }
18.  
19.     private void ConvertChildren(Transform transform)
20.     {
21.         foreach (Transform child in transform)
22.         {
23.             ConvertGameObject(child.gameObject);
24.  
25.             ConvertChildren(child);
26.         }
27.     }
28.     private void ConvertGameObject(GameObject gameObject)
29.     {
30.         Entity prefab = GameObjectConversionUtility.ConvertGameObjectHierarchy(gameObject, conversionSettings);
31.         var entity = entityManager.Instantiate(prefab);
32.     }
33.  
34.     private void Cleanup()
35.     {
36.         conversionSettings.BlobAssetStore.Dispose();
37.     }
38. }

Currently there are 33 child objects, each a basic cliff/rock with the same material that is set to "Enable GPU Instancing" and when that code runs I get 33 instances of the following error:

-------------------------------------------------------------------
NullReferenceException
Unity.Rendering.LightMaps.CopyToTextureArray (System.Collections.Generic.List`1[T] source) (at Library/PackageCache/com.unity.rendering.hybrid@0.11.0-preview.42/Unity.Rendering.Hybrid/LightMaps.cs:52)
Unity.Rendering.LightMaps.ConstructLightMaps (System.Collections.Generic.List`1[T] inColors, System.Collections.Generic.List`1[T] inDirections, System.Collections.Generic.List`1[T] inShadowMasks) (at Library/PackageCache/com.unity.rendering.hybrid@0.11.0-preview.42/Unity.Rendering.Hybrid/LightMaps.cs:67)
Unity.Rendering.LightMapConversionContext.ProcessLightMapsForConversion () (at Library/PackageCache/com.unity.rendering.hybrid@0.11.0-preview.42/Unity.Rendering.Hybrid/RenderMeshConversionContext.cs:188)
Unity.Rendering.RenderMeshConversionContext.ProcessLightMapsForConversion () (at Library/PackageCache/com.unity.rendering.hybrid@0.11.0-preview.42/Unity.Rendering.Hybrid/RenderMeshConversionContext.cs:328)
Unity.Rendering.MeshRendererConversion.OnUpdate () (at Library/PackageCache/com.unity.rendering.hybrid@0.11.0-preview.42/Unity.Rendering.Hybrid/MeshRendererConversion.cs:41)
Unity.Entities.ComponentSystem.Update () (at Library/PackageCache/com.unity.entities@0.17.0-preview.41/Unity.Entities/ComponentSystem.cs:114)
Unity.Entities.ComponentSystemGroup.UpdateAllSystems () (at Library/PackageCache/com.unity.entities@0.17.0-preview.41/Unity.Entities/ComponentSystemGroup.cs:472)
UnityEngine.DebugLogHandler:LogException(Exception, Object)
Unity.Entities.Conversion.JournalingUnityLogger:LogException(Exception, Object) (at Library/PackageCache/com.unity.entities@0.17.0-preview.41/Unity.Entities.Hybrid/GameObjectConversion/JournalingUnityLogger.cs:50)
UnityEngine.Debug:LogException(Exception)
Unity.Debug:LogException(Exception) (at Library/PackageCache/com.unity.entities@0.17.0-preview.41/Unity.Entities/Stubs/Unity/Debug.cs:19)
Unity.Entities.ComponentSystemGroup:UpdateAllSystems() (at Library/PackageCache/com.unity.entities@0.17.0-preview.41/Unity.Entities/ComponentSystemGroup.cs:477)
Unity.Entities.ComponentSystemGroup:OnUpdate() (at Library/PackageCache/com.unity.entities@0.17.0-preview.41/Unity.Entities/ComponentSystemGroup.cs:417)
Unity.Entities.ComponentSystem:Update() (at Library/PackageCache/com.unity.entities@0.17.0-preview.41/Unity.Entities/ComponentSystem.cs:114)
Unity.Entities.GameObjectConversionUtility:Convert(World) (at Library/PackageCache/com.unity.entities@0.17.0-preview.41/Unity.Entities.Hybrid/GameObjectConversion/GameObjectConversionUtility.cs:152)
Unity.Entities.GameObjectConversionUtility:ConvertGameObjectHierarchy(GameObject, GameObjectConversionSettings) (at Library/PackageCache/com.unity.entities@0.17.0-preview.41/Unity.Entities.Hybrid/GameObjectConversion/GameObjectConversionUtility.cs:277)
GameObjectToEntityConversion:ConvertGameObject(GameObject) (at Assets/Virtual Tolkien/Scripts/GameObjectToEntityConversion.cs:30)
GameObjectToEntityConversion:ConvertChildren(Transform) (at Assets/Virtual Tolkien/Scripts/GameObjectToEntityConversion.cs:23)
GameObjectToEntityConversion:Start() (at Assets/Virtual Tolkien/Scripts/GameObjectToEntityConversion.cs:14)

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So.. what dumbass thing am I doing wrong?

Thanks kindly.

 

Use IConvertGameObjectToEntity?

 

Do you have an example on how to do so?

Thanks

 

https://github.com/Unity-Technologies/EntityComponentSystemSamples/tree/master/ECSSamples/Assets/HelloCube/5. SpawnFromEntity

"SpawnerAuthoring_FromEntity.cs" is the main one you want to look at.


Some more examples:

https://github.com/Unity-Technologies/EntityComponentSystemSamples/blob/c13d4eb831d9794ac00d4f11f8209b50db7ef25b/ECSSamples/Assets/Use Case Samples/1. State Machine AI/PlayerAuthoring.cs

Main thread for this API:
https://forum.unity.com/threads/new-subscene-converttoentity-workflows.638785/

 

Thanks kindly, you rule

Thanks kindly, you rule.