GameObject-Entity conversion examples

ConvertGameObjectHierarchyExample.cs

using UnityEngine;
using Unity.Entities;

public class ConvertGameObjectHierarchyExample : MonoBehaviour
{
	[SerializeField] GameObject _prefab = null;
	BlobAssetStore _blobAssetStore;
	void Awake ()
	{
		var world = World.DefaultGameObjectInjectionWorld;
		var command = world.EntityManager;
		_blobAssetStore = new BlobAssetStore();
		var conversionSettings = GameObjectConversionSettings.FromWorld( world , _blobAssetStore );
		
		Entity prefab = GameObjectConversionUtility.ConvertGameObjectHierarchy( _prefab , conversionSettings );
		Entity instance = command.Instantiate( prefab );

		// _blobAssetStore.Dispose();// causes exceptions @0.50
	}
	void OnDestroy ()
	{
		_blobAssetStore.Dispose();//workaround
	}
}

ConvertGameObjectsToEntitiesExample.cs

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

public class ConvertGameObjectsToEntitiesExample : MonoBehaviour, IConvertGameObjectToEntity, IDeclareReferencedPrefabs
{
	[SerializeField] GameObject[] _prefabs = new GameObject[0];
	void IConvertGameObjectToEntity.Convert ( Entity entity , EntityManager dstManager , GameObjectConversionSystem conversionSystem )
	{
		var prefabs = dstManager.AddBuffer<MyPrefabs>( entity );

		for( int i=0 ; i<_prefabs.Length ; i++ )
		{
			var next = _prefabs[i];
			if( next!=null )
			{
				Entity prefab = conversionSystem.GetPrimaryEntity( next );
				prefabs.Add( new MyPrefabs{
					Value = prefab
				} );
			}
		}
	}
	void IDeclareReferencedPrefabs.DeclareReferencedPrefabs ( List<GameObject> referencedPrefabs ) => referencedPrefabs.AddRange( _prefabs );
}

[InternalBufferCapacity(0)]
public struct MyPrefabs : IBufferElementData
{
	public Entity Value;
}

MyComponentAuthoring.cs

using UnityEngine;
using Unity.Entities;
using Unity.Collections;

[RequireComponent( typeof(ConvertToEntity) )]
public class MyComponentAuthoring : MonoBehaviour, IConvertGameObjectToEntity
{
	[SerializeField] string _value = "hello dots";
	void IConvertGameObjectToEntity.Convert ( Entity entity , EntityManager dstManager , GameObjectConversionSystem conversionSystem )
	{
		dstManager.AddComponentData( entity , new MyComponent{
			Value = _value
		} );
	}
}

public struct MyComponent : IComponentData
{
	public FixedString32Bytes Value;
}