/// <summary>
/// Instantiates / Copies all entities from srcEntityManager and copies them into this EntityManager.
/// Entity references on components that are being cloned to entities inside the srcEntities set are remapped to the instantiated entities.
/// </summary>
public void CopyEntitiesFrom(EntityManager srcEntityManager, NativeArray <Entity> srcEntities, NativeArray <Entity> outputEntities = default)
{
#if ENABLE_UNITY_COLLECTIONS_CHECKS
if (outputEntities.IsCreated && outputEntities.Length != srcEntities.Length)
{
throw new ArgumentException("outputEntities.Length must match srcEntities.Length");
}
#endif
using (var srcManagerInstances = new NativeArray <Entity>(srcEntities.Length, Allocator.Temp))
{
srcEntityManager.CopyEntities(srcEntities, srcManagerInstances);
srcEntityManager.AddComponent(srcManagerInstances, ComponentType.ReadWrite <IsolateCopiedEntities>());
var instantiated = srcEntityManager.CreateEntityQuery(new EntityQueryDesc
{
All = new ComponentType[] { typeof(IsolateCopiedEntities) },
Options = EntityQueryOptions.IncludeDisabled | EntityQueryOptions.IncludePrefab
});
using (var entityRemapping = srcEntityManager.CreateEntityRemapArray(Allocator.TempJob))
{
MoveEntitiesFromInternalQuery(srcEntityManager, instantiated, entityRemapping);
EntityRemapUtility.GetTargets(out var output, entityRemapping);
RemoveComponent(output, ComponentType.ReadWrite <IsolateCopiedEntities>());
output.Dispose();
if (outputEntities.IsCreated)
{
for (int i = 0; i != outputEntities.Length; i++)
{
outputEntities[i] = entityRemapping[srcManagerInstances[i].Index].Target;
}
}
}
}
}
