// ----------------------------------------------------------------------------------------------------------
// PUBLIC
// ----------------------------------------------------------------------------------------------------------
/// <summary>
/// Moves all entities managed by the specified EntityManager to the <see cref="World"/> of this EntityManager and fills
/// an array with their <see cref="Entity"/> objects.
/// </summary>
/// <remarks>
/// After the move, the entities are managed by this EntityManager. Use the `output` array to make post-move
/// changes to the transferred entities.
///
/// Each world has one EntityManager, which manages all the entities in that world. This function
/// allows you to transfer entities from one World to another.
///
/// **Important:** This function creates a sync point, which means that the EntityManager waits for all
/// currently running Jobs to complete before moving the entities and no additional Jobs can start before
/// the function is finished. A sync point can cause a drop in performance because the ECS framework may not
/// be able to make use of the processing power of all available cores.
/// </remarks>
/// <param name="output">An array to receive the Entity objects of the transferred entities.</param>
/// <param name="srcEntities">The EntityManager whose entities are appropriated.</param>
/// <param name="entityRemapping">A set of entity transformations to make during the transfer.</param>
/// <exception cref="ArgumentException"></exception>
public void MoveEntitiesFrom(out NativeArray <Entity> output, EntityManager srcEntities,
NativeArray <EntityRemapUtility.EntityRemapInfo> entityRemapping)
{
#if ENABLE_UNITY_COLLECTIONS_CHECKS
if (srcEntities == this)
{
throw new ArgumentException("srcEntities must not be the same as this EntityManager.");
}
if (!srcEntities.m_ManagedComponentStore.AllSharedComponentReferencesAreFromChunks(srcEntities
.EntityComponentStore))
{
throw new ArgumentException(
"EntityManager.MoveEntitiesFrom failed - All ISharedComponentData references must be from EntityManager. (For example EntityQuery.SetFilter with a shared component type is not allowed during EntityManager.MoveEntitiesFrom)");
}
#endif
BeforeStructuralChange();
srcEntities.BeforeStructuralChange();
var archetypeChanges = EntityComponentStore->BeginArchetypeChangeTracking();
EntityManagerMoveEntitiesUtility.MoveChunks(entityRemapping,
srcEntities.EntityComponentStore, srcEntities.ManagedComponentStore,
EntityComponentStore, ManagedComponentStore);
EntityRemapUtility.GetTargets(out output, entityRemapping);
var changedArchetypes = EntityComponentStore->EndArchetypeChangeTracking(archetypeChanges);
EntityGroupManager.AddAdditionalArchetypes(changedArchetypes);
//@TODO: Need to increment the component versions based the moved chunks...
}
// ----------------------------------------------------------------------------------------------------------
// INTERNAL
// ----------------------------------------------------------------------------------------------------------
void MoveEntitiesFrom(out NativeArray <Entity> output, EntityManager srcEntities,
NativeArray <ArchetypeChunk> chunks, NativeArray <EntityRemapUtility.EntityRemapInfo> entityRemapping)
{
#if ENABLE_UNITY_COLLECTIONS_CHECKS
if (srcEntities == this)
{
throw new ArgumentException("srcEntities must not be the same as this EntityManager.");
}
for (int i = 0; i < chunks.Length; ++i)
{
if (chunks[i].m_Chunk->Archetype->HasChunkHeader)
{
throw new ArgumentException(
"MoveEntitiesFrom can not move chunks that contain ChunkHeader components.");
}
}
#endif
BeforeStructuralChange();
srcEntities.BeforeStructuralChange();
var archetypeChanges = EntityComponentStore->BeginArchetypeChangeTracking();
EntityManagerMoveEntitiesUtility.MoveChunks(chunks, entityRemapping,
srcEntities.EntityComponentStore, srcEntities.ManagedComponentStore,
EntityComponentStore, ManagedComponentStore);
var changedArchetypes = EntityComponentStore->EndArchetypeChangeTracking(archetypeChanges);
EntityGroupManager.AddAdditionalArchetypes(changedArchetypes);
EntityRemapUtility.GetTargets(out output, entityRemapping);
}
/// <summary>
/// Moves all entities managed by the specified EntityManager to the <see cref="World"/> of this EntityManager and fills
/// an array with their Entity objects.
/// </summary>
/// <remarks>
/// After the move, the entities are managed by this EntityManager. Use the `output` array to make post-move
/// changes to the transferred entities.
///
/// Each world has one EntityManager, which manages all the entities in that world. This function
/// allows you to transfer entities from one World to another.
///
/// **Important:** This function creates a sync point, which means that the EntityManager waits for all
/// currently running Jobs to complete before moving the entities and no additional Jobs can start before
/// the function is finished. A sync point can cause a drop in performance because the ECS framework may not
/// be able to make use of the processing power of all available cores.
/// </remarks>
/// <param name="output">An array to receive the Entity objects of the transferred entities.</param>
/// <param name="srcEntities">The EntityManager whose entities are appropriated.</param>
public void MoveEntitiesFrom(out NativeArray <Entity> output, EntityManager srcEntities)
{
using (var entityRemapping = srcEntities.CreateEntityRemapArray(Allocator.TempJob))
{
MoveEntitiesFromInternalAll(srcEntities, entityRemapping);
EntityRemapUtility.GetTargets(out output, entityRemapping);
}
}
/// <summary>
/// Moves all entities managed by the specified EntityManager to the <see cref="World"/> of this EntityManager and fills
/// an array with their <see cref="Entity"/> objects.
/// </summary>
/// <remarks>
/// After the move, the entities are managed by this EntityManager. Use the `output` array to make post-move
/// changes to the transferred entities.
///
/// Each world has one EntityManager, which manages all the entities in that world. This function
/// allows you to transfer entities from one World to another.
///
/// **Important:** This function creates a sync point, which means that the EntityManager waits for all
/// currently running Jobs to complete before moving the entities and no additional Jobs can start before
/// the function is finished. A sync point can cause a drop in performance because the ECS framework may not
/// be able to make use of the processing power of all available cores.
/// </remarks>
/// <param name="output">An array to receive the Entity objects of the transferred entities.</param>
/// <param name="srcEntities">The EntityManager whose entities are appropriated.</param>
/// <param name="entityRemapping">A set of entity transformations to make during the transfer.</param>
/// <exception cref="ArgumentException"></exception>
public void MoveEntitiesFrom(out NativeArray <Entity> output, EntityManager srcEntities, NativeArray <EntityRemapUtility.EntityRemapInfo> entityRemapping)
{
MoveEntitiesFromInternalAll(srcEntities, entityRemapping);
EntityRemapUtility.GetTargets(out output, entityRemapping);
}