/// <summary>
/// Copies all entities from srcEntityManager and replaces all entities in this EntityManager
/// </summary>
/// <remarks>
/// Guarantees that the chunk layout & order of the entities will match exactly, thus this method can be used for deterministic rollback.
/// This feature is not complete and only supports a subset of the EntityManager features at the moment:
/// * Currently it copies all SystemStateComponents (They should not be copied)
/// * Currently does not support class based components
/// </remarks>
public void CopyAndReplaceEntitiesFrom(EntityManager srcEntityManager)
{
srcEntityManager.CompleteAllJobs();
CompleteAllJobs();
var srcAccess = srcEntityManager.GetCheckedEntityDataAccess();
var selfAccess = GetCheckedEntityDataAccess();
using (var srcChunks = srcAccess->ManagedEntityDataAccess.m_UniversalQueryWithChunks.CreateArchetypeChunkArrayAsync(Allocator.TempJob, out var srcChunksJob))
using (var dstChunks = selfAccess->ManagedEntityDataAccess.m_UniversalQueryWithChunks.CreateArchetypeChunkArrayAsync(Allocator.TempJob, out var dstChunksJob))
{
using (var archetypeChunkChanges = EntityDiffer.GetArchetypeChunkChanges(
srcChunks,
dstChunks,
Allocator.TempJob,
jobHandle: out var archetypeChunkChangesJob,
dependsOn: JobHandle.CombineDependencies(srcChunksJob, dstChunksJob)))
{
archetypeChunkChangesJob.Complete();
EntityDiffer.CopyAndReplaceChunks(srcEntityManager, this, selfAccess->ManagedEntityDataAccess.m_UniversalQueryWithChunks, archetypeChunkChanges);
Unity.Entities.EntityComponentStore.AssertSameEntities(srcAccess->EntityComponentStore, selfAccess->EntityComponentStore);
}
}
}
/// <summary>
/// Copies all entities from srcEntityManager and replaces all entities in this EntityManager
/// </summary>
/// <remarks>
/// Guarantees that the chunk layout & order of the entities will match exactly, thus this method can be used for deterministic rollback.
/// This feature is not complete and only supports a subset of the EntityManager features at the moment:
/// * Currently it copies all SystemStateComponents (They should not be copied)
/// * Currently does not support class based components
/// </remarks>
public void CopyAndReplaceEntitiesFrom(EntityManager srcEntityManager)
{
#if ENABLE_UNITY_COLLECTIONS_CHECKS
if (srcEntityManager == null || !srcEntityManager.IsCreated)
{
throw new ArgumentNullException(nameof(srcEntityManager));
}
if (!IsCreated)
{
throw new ArgumentException("This EntityManager has been destroyed");
}
#endif
srcEntityManager.CompleteAllJobs();
CompleteAllJobs();
using (var srcChunks = srcEntityManager.m_UniversalQueryWithChunks.CreateArchetypeChunkArray(Allocator.TempJob, out var srcChunksJob))
using (var dstChunks = m_UniversalQueryWithChunks.CreateArchetypeChunkArray(Allocator.TempJob, out var dstChunksJob))
{
using (var archetypeChunkChanges = EntityDiffer.GetArchetypeChunkChanges(
srcChunks,
dstChunks,
Allocator.TempJob,
jobHandle: out var archetypeChunkChangesJob,
dependsOn: JobHandle.CombineDependencies(srcChunksJob, dstChunksJob)))
{
archetypeChunkChangesJob.Complete();
EntityDiffer.CopyAndReplaceChunks(srcEntityManager, this, m_UniversalQueryWithChunks, archetypeChunkChanges);
Unity.Entities.EntityComponentStore.AssertSameEntities(srcEntityManager.EntityComponentStore, EntityComponentStore);
}
}
}