//----------------------------------------------------------------------//
// FBehaviorTreeInstance
//----------------------------------------------------------------------//
void FBehaviorTreeInstance::Initialize(UBehaviorTreeComponent& OwnerComp, UBTCompositeNode& Node, int32& InstancedIndex, EBTMemoryInit::Type InitType)
{
for (int32 ServiceIndex = 0; ServiceIndex < Node.Services.Num(); ServiceIndex++)
{
Node.Services[ServiceIndex]->InitializeInSubtree(OwnerComp, Node.Services[ServiceIndex]->GetNodeMemory<uint8>(*this), InstancedIndex, InitType);
}
uint8* NodeMemory = Node.GetNodeMemory<uint8>(*this);
Node.InitializeInSubtree(OwnerComp, NodeMemory, InstancedIndex, InitType);
UBTCompositeNode* InstancedComposite = Cast<UBTCompositeNode>(Node.GetNodeInstance(OwnerComp, NodeMemory));
if (InstancedComposite)
{
InstancedComposite->InitializeComposite(Node.GetLastExecutionIndex());
}
for (int32 ChildIndex = 0; ChildIndex < Node.Children.Num(); ChildIndex++)
{
FBTCompositeChild& ChildInfo = Node.Children[ChildIndex];
for (int32 DecoratorIndex = 0; DecoratorIndex < ChildInfo.Decorators.Num(); DecoratorIndex++)
{
UBTDecorator* DecoratorOb = ChildInfo.Decorators[DecoratorIndex];
uint8* DecoratorMemory = DecoratorOb->GetNodeMemory<uint8>(*this);
DecoratorOb->InitializeInSubtree(OwnerComp, DecoratorMemory, InstancedIndex, InitType);
UBTDecorator* InstancedDecoratorOb = Cast<UBTDecorator>(DecoratorOb->GetNodeInstance(OwnerComp, DecoratorMemory));
if (InstancedDecoratorOb)
{
InstancedDecoratorOb->InitializeDecorator(DecoratorOb->GetChildIndex());
}
}
if (ChildInfo.ChildComposite)
{
Initialize(OwnerComp, *(ChildInfo.ChildComposite), InstancedIndex, InitType);
}
else if (ChildInfo.ChildTask)
{
ChildInfo.ChildTask->InitializeInSubtree(OwnerComp, ChildInfo.ChildTask->GetNodeMemory<uint8>(*this), InstancedIndex, InitType);
}
}
}
static void InitializeNodeHelper(UBTCompositeNode* ParentNode, UBTNode* NodeOb,
uint8 TreeDepth, uint16& ExecutionIndex, TArray<FNodeInitializationData>& InitList,
UBehaviorTree& TreeAsset, UObject* NodeOuter)
{
// special case: subtrees
UBTTask_RunBehavior* SubtreeTask = Cast<UBTTask_RunBehavior>(NodeOb);
if (SubtreeTask)
{
ExecutionIndex += SubtreeTask->GetInjectedNodesCount();
}
InitList.Add(FNodeInitializationData(NodeOb, ParentNode, ExecutionIndex, TreeDepth, NodeOb->GetInstanceMemorySize(), NodeOb->GetSpecialMemorySize()));
NodeOb->InitializeFromAsset(TreeAsset);
ExecutionIndex++;
UBTCompositeNode* CompositeOb = Cast<UBTCompositeNode>(NodeOb);
if (CompositeOb)
{
for (int32 ServiceIndex = 0; ServiceIndex < CompositeOb->Services.Num(); ServiceIndex++)
{
if (CompositeOb->Services[ServiceIndex] == NULL)
{
UE_LOG(LogBehaviorTree, Warning, TEXT("%s has missing service node! (parent: %s)"),
*TreeAsset.GetName(), *UBehaviorTreeTypes::DescribeNodeHelper(CompositeOb));
CompositeOb->Services.RemoveAt(ServiceIndex, 1, false);
ServiceIndex--;
continue;
}
UBTService* Service = Cast<UBTService>(StaticDuplicateObject(CompositeOb->Services[ServiceIndex], NodeOuter, TEXT("None")));;
CompositeOb->Services[ServiceIndex] = Service;
InitList.Add(FNodeInitializationData(Service, CompositeOb, ExecutionIndex, TreeDepth,
Service->GetInstanceMemorySize(), Service->GetSpecialMemorySize()));
Service->InitializeFromAsset(TreeAsset);
ExecutionIndex++;
}
for (int32 ChildIndex = 0; ChildIndex < CompositeOb->Children.Num(); ChildIndex++)
{
FBTCompositeChild& ChildInfo = CompositeOb->Children[ChildIndex];
for (int32 DecoratorIndex = 0; DecoratorIndex < ChildInfo.Decorators.Num(); DecoratorIndex++)
{
if (ChildInfo.Decorators[DecoratorIndex] == NULL)
{
UE_LOG(LogBehaviorTree, Warning, TEXT("%s has missing decorator node! (parent: %s, branch: %d)"),
*TreeAsset.GetName(), *UBehaviorTreeTypes::DescribeNodeHelper(CompositeOb), ChildIndex);
ChildInfo.Decorators.RemoveAt(DecoratorIndex, 1, false);
DecoratorIndex--;
continue;
}
UBTDecorator* Decorator = Cast<UBTDecorator>(StaticDuplicateObject(ChildInfo.Decorators[DecoratorIndex], NodeOuter, TEXT("None")));
ChildInfo.Decorators[DecoratorIndex] = Decorator;
InitList.Add(FNodeInitializationData(Decorator, CompositeOb, ExecutionIndex, TreeDepth,
Decorator->GetInstanceMemorySize(), Decorator->GetSpecialMemorySize()));
Decorator->InitializeFromAsset(TreeAsset);
Decorator->InitializeDecorator(ChildIndex);
ExecutionIndex++;
}
UBTNode* ChildNode = NULL;
if (ChildInfo.ChildComposite)
{
ChildInfo.ChildComposite = Cast<UBTCompositeNode>(StaticDuplicateObject(ChildInfo.ChildComposite, NodeOuter, TEXT("None")));
ChildNode = ChildInfo.ChildComposite;
}
else if (ChildInfo.ChildTask)
{
ChildInfo.ChildTask = Cast<UBTTaskNode>(StaticDuplicateObject(ChildInfo.ChildTask, NodeOuter, TEXT("None")));
ChildNode = ChildInfo.ChildTask;
}
if (ChildNode)
{
InitializeNodeHelper(CompositeOb, ChildNode, TreeDepth + 1, ExecutionIndex, InitList, TreeAsset, NodeOuter);
}
}
CompositeOb->InitializeComposite(ExecutionIndex - 1);
}
}
void UBTTask_RunBehavior::InjectNodes(UBehaviorTreeComponent& OwnerComp, uint8* NodeMemory, int32& InstancedIndex) const
{
if (BehaviorAsset == NULL || BehaviorAsset->RootDecorators.Num() == 0)
{
return;
}
const int32 NumInjectedDecorators = BehaviorAsset->RootDecorators.Num();
FBTInstancedNodeMemory* NodeMemoryHeader = (FBTInstancedNodeMemory*)NodeMemory;
int32 FirstNodeIdx = NodeMemoryHeader->NodeIdx;
uint8* InjectedMemoryBase = NodeMemory + sizeof(FBTInstancedNodeMemory);
// initialize on first access
if (!OwnerComp.NodeInstances.IsValidIndex(InstancedIndex))
{
TArray<uint16> MemoryOffsets;
int32 MemorySize = 0;
UBehaviorTreeManager::InitializeMemoryHelper(BehaviorAsset->RootDecorators, MemoryOffsets, MemorySize);
const int32 AlignedInstanceMemorySize = UBehaviorTreeManager::GetAlignedDataSize(sizeof(FBTInstancedNodeMemory));
// prepare dummy memory block for nodes that won't require instancing and offset it by special data size
// InitializeInSubtree will read it through GetSpecialNodeMemory function, which moves pointer back
FBTInstancedNodeMemory DummyMemory;
uint8* RawDummyMemory = ((uint8*)&DummyMemory) + AlignedInstanceMemorySize;
// newly created nodes = full init
EBTMemoryInit::Type InitType = EBTMemoryInit::Initialize;
NodeMemoryHeader->NodeIdx = InstancedIndex;
FirstNodeIdx = InstancedIndex;
// create nodes
for (int32 Idx = 0; Idx < NumInjectedDecorators; Idx++)
{
UBTDecorator* DecoratorOb = BehaviorAsset->RootDecorators[Idx];
const bool bUsesInstancing = DecoratorOb->HasInstance();
if (bUsesInstancing)
{
DecoratorOb->InitializeInSubtree(OwnerComp, InjectedMemoryBase + MemoryOffsets[Idx], InstancedIndex, InitType);
}
else
{
DecoratorOb->ForceInstancing(true);
DecoratorOb->InitializeInSubtree(OwnerComp, RawDummyMemory, InstancedIndex, InitType);
DecoratorOb->ForceInstancing(false);
UBTDecorator* InstancedOb = Cast<UBTDecorator>(OwnerComp.NodeInstances.Last());
InstancedOb->InitializeMemory(OwnerComp, InjectedMemoryBase + MemoryOffsets[Idx], InitType);
}
}
// setup their properties
uint16 NewExecutionIdx = GetExecutionIndex() - GetInjectedNodesCount();
for (int32 Idx = 0; Idx < NumInjectedDecorators; Idx++)
{
UBTDecorator* InstancedOb = Cast<UBTDecorator>(OwnerComp.NodeInstances[FirstNodeIdx + Idx]);
InstancedOb->InitializeNode(GetParentNode(), NewExecutionIdx, GetMemoryOffset() + MemoryOffsets[Idx], GetTreeDepth() - 1);
InstancedOb->MarkInjectedNode();
NewExecutionIdx++;
}
}
else
{
// restoring existing nodes = partial init
EBTMemoryInit::Type InitType = EBTMemoryInit::RestoreSubtree;
// initialize memory for injected nodes
for (int32 Idx = 0; Idx < NumInjectedDecorators; Idx++)
{
UBTDecorator* DecoratorOb = BehaviorAsset->RootDecorators[Idx];
UBTDecorator* InstancedOb = Cast<UBTDecorator>(OwnerComp.NodeInstances[FirstNodeIdx + Idx]);
const bool bUsesInstancing = DecoratorOb->HasInstance();
if (bUsesInstancing)
{
InstancedOb->OnInstanceCreated(OwnerComp);
}
else
{
uint8* InjectedNodeMemory = InjectedMemoryBase + (InstancedOb->GetMemoryOffset() - GetMemoryOffset());
InstancedOb->InitializeMemory(OwnerComp, InjectedNodeMemory, InitType);
}
}
InstancedIndex += NumInjectedDecorators;
}
// inject nodes
if (GetParentNode())
{
const int32 ChildIdx = GetParentNode()->GetChildIndex(*this);
if (ChildIdx != INDEX_NONE)
{
FBTCompositeChild& LinkData = GetParentNode()->Children[ChildIdx];
// check if link already has injected decorators
bool bAlreadyInjected = false;
for (int32 Idx = 0; Idx < LinkData.Decorators.Num(); Idx++)
{
if (LinkData.Decorators[Idx] && LinkData.Decorators[Idx]->IsInjected())
{
bAlreadyInjected = true;
break;
}
}
// add decorators to link
const int32 NumOriginalDecorators = LinkData.Decorators.Num();
for (int32 Idx = 0; Idx < NumInjectedDecorators; Idx++)
{
UBTDecorator* InstancedOb = Cast<UBTDecorator>(OwnerComp.NodeInstances[FirstNodeIdx + Idx]);
InstancedOb->InitializeFromAsset(*BehaviorAsset);
InstancedOb->InitializeDecorator(ChildIdx);
if (!bAlreadyInjected)
{
LinkData.Decorators.Add(InstancedOb);
}
}
// update composite logic operators
if (!bAlreadyInjected && (LinkData.DecoratorOps.Num() || BehaviorAsset->RootDecoratorOps.Num()))
{
const int32 NumOriginalOps = LinkData.DecoratorOps.Num();
if (NumOriginalDecorators > 0)
{
// and operator for two groups of composites: original and new one
FBTDecoratorLogic MasterAndOp(EBTDecoratorLogic::And, LinkData.DecoratorOps.Num() ? 2 : (NumOriginalDecorators + 1));
LinkData.DecoratorOps.Insert(MasterAndOp, 0);
if (NumOriginalOps == 0)
{
// add Test operations, original link didn't have composite operators
for (int32 Idx = 0; Idx < NumOriginalDecorators; Idx++)
{
FBTDecoratorLogic TestOp(EBTDecoratorLogic::Test, Idx);
LinkData.DecoratorOps.Add(TestOp);
}
}
}
// add injected operators
if (BehaviorAsset->RootDecoratorOps.Num() == 0)
{
FBTDecoratorLogic InjectedAndOp(EBTDecoratorLogic::And, NumInjectedDecorators);
LinkData.DecoratorOps.Add(InjectedAndOp);
for (int32 Idx = 0; Idx < NumInjectedDecorators; Idx++)
{
FBTDecoratorLogic TestOp(EBTDecoratorLogic::Test, NumOriginalDecorators + Idx);
LinkData.DecoratorOps.Add(TestOp);
}
}
else
{
for (int32 Idx = 0; Idx < BehaviorAsset->RootDecoratorOps.Num(); Idx++)
{
FBTDecoratorLogic InjectedOp = BehaviorAsset->RootDecoratorOps[Idx];
if (InjectedOp.Operation == EBTDecoratorLogic::Test)
{
InjectedOp.Number += NumOriginalDecorators;
}
LinkData.DecoratorOps.Add(InjectedOp);
}
}
}
#if USE_BEHAVIORTREE_DEBUGGER
if (!bAlreadyInjected)
{
// insert to NextExecutionNode list for debugger
UBTNode* NodeIt = GetParentNode();
while (NodeIt && NodeIt->GetNextNode() != this)
{
NodeIt = NodeIt->GetNextNode();
}
if (NodeIt)
{
NodeIt->InitializeExecutionOrder(OwnerComp.NodeInstances[FirstNodeIdx]);
NodeIt = NodeIt->GetNextNode();
for (int32 Idx = 1; Idx < NumInjectedDecorators; Idx++)
{
NodeIt->InitializeExecutionOrder(OwnerComp.NodeInstances[FirstNodeIdx + Idx]);
NodeIt = NodeIt->GetNextNode();
}
NodeIt->InitializeExecutionOrder((UBTNode*)this);
}
}
#endif
}
}
}
