public static void DestroyChunkForDiffing(Chunk *chunk,
EntityComponentStore *entityComponentStore,
ManagedComponentStore managedComponentStore)
{
chunk->Archetype->EntityCount -= chunk->Count;
entityComponentStore->FreeEntities(chunk);
EntityManagerCreateDestroyEntitiesUtility.SetChunkCount(chunk, 0,
entityComponentStore, managedComponentStore);
}
public static Chunk *CloneChunkForDiffing(Chunk *chunk,
ManagedComponentStore srcManagedManager,
EntityComponentStore *dstEntityComponentStore,
ManagedComponentStore dstManagedComponentStore,
EntityGroupManager dstEntityGroupManager)
{
int *sharedIndices = stackalloc int[chunk->Archetype->NumSharedComponents];
chunk->SharedComponentValues.CopyTo(sharedIndices, 0, chunk->Archetype->NumSharedComponents);
dstManagedComponentStore.CopySharedComponents(srcManagedManager, sharedIndices,
chunk->Archetype->NumSharedComponents);
// Allocate a new chunk
Archetype *arch = EntityManagerCreateArchetypeUtility.GetOrCreateArchetype(chunk->Archetype->Types,
chunk->Archetype->TypesCount, dstEntityComponentStore, dstEntityGroupManager);
Chunk *targetChunk = EntityManagerCreateDestroyEntitiesUtility.GetCleanChunk(arch, sharedIndices,
dstEntityComponentStore, dstManagedComponentStore, dstEntityGroupManager);
// GetCleanChunk & CopySharedComponents both acquire a ref, once chunk owns, release CopySharedComponents ref
for (int i = 0; i < chunk->Archetype->NumSharedComponents; ++i)
{
dstManagedComponentStore.RemoveReference(sharedIndices[i]);
}
UnityEngine.Assertions.Assert.AreEqual(0, targetChunk->Count);
UnityEngine.Assertions.Assert.IsTrue(targetChunk->Capacity >= chunk->Count);
int copySize = Chunk.GetChunkBufferSize();
UnsafeUtility.MemCpy(targetChunk->Buffer, chunk->Buffer, copySize);
EntityManagerCreateDestroyEntitiesUtility.SetChunkCount(targetChunk, chunk->Count,
dstEntityComponentStore, dstManagedComponentStore, dstEntityGroupManager);
targetChunk->Archetype->EntityCount += chunk->Count;
BufferHeader.PatchAfterCloningChunk(targetChunk);
var tempEntities = new NativeArray <Entity>(targetChunk->Count, Allocator.Temp);
dstEntityComponentStore->AllocateEntities(targetChunk->Archetype, targetChunk, 0, targetChunk->Count,
(Entity *)tempEntities.GetUnsafePtr());
tempEntities.Dispose();
return(targetChunk);
}
