bool AAIController::RunBehaviorTree(UBehaviorTree* BTAsset)
{
// @todo: find BrainComponent and see if it's BehaviorTreeComponent
// Also check if BTAsset requires BlackBoardComponent, and if so
// check if BB type is accepted by BTAsset.
// Spawn BehaviorTreeComponent if none present.
// Spawn BlackBoardComponent if none present, but fail if one is present but is not of compatible class
if (BTAsset == NULL)
{
UE_VLOG(this, LogBehaviorTree, Warning, TEXT("RunBehaviorTree: Unable to run NULL behavior tree"));
return false;
}
bool bSuccess = true;
bool bShouldInitializeBlackboard = false;
// see if need a blackboard component at all
UBlackboardComponent* BlackboardComp = Blackboard;
if (BTAsset->BlackboardAsset && (Blackboard == nullptr || Blackboard->IsCompatibleWith(BTAsset->BlackboardAsset) == false))
{
bSuccess = UseBlackboard(BTAsset->BlackboardAsset, BlackboardComp);
}
if (bSuccess)
{
UBehaviorTreeComponent* BTComp = Cast<UBehaviorTreeComponent>(BrainComponent);
if (BTComp == NULL)
{
UE_VLOG(this, LogBehaviorTree, Log, TEXT("RunBehaviorTree: spawning BehaviorTreeComponent.."));
BTComp = NewObject<UBehaviorTreeComponent>(this, TEXT("BTComponent"));
BTComp->RegisterComponent();
}
// make sure BrainComponent points at the newly created BT component
BrainComponent = BTComp;
check(BTComp != NULL);
BTComp->StartTree(*BTAsset, EBTExecutionMode::Looped);
}
return bSuccess;
}
bool AAIController::RunBehaviorTree(UBehaviorTree* BTAsset)
{
// @todo: find BrainComponent and see if it's BehaviorTreeComponent
// Also check if BTAsset requires BlackBoardComponent, and if so
// check if BB type is accepted by BTAsset.
// Spawn BehaviorTreeComponent if none present.
// Spawn BlackBoardComponent if none present, but fail if one is present but is not of compatible class
if (BTAsset == NULL)
{
UE_VLOG(this, LogBehaviorTree, Warning, TEXT("RunBehaviorTree: Unable to run NULL behavior tree"));
return false;
}
bool bSuccess = true;
bool bShouldInitializeBlackboard = false;
// see if need a blackboard component at all
UBlackboardComponent* BlackboardComp = NULL;
if (BTAsset->BlackboardAsset)
{
bSuccess = UseBlackboard(BTAsset->BlackboardAsset);
BlackboardComp = FindComponentByClass<UBlackboardComponent>();
}
if (bSuccess)
{
UBehaviorTreeComponent* BTComp = Cast<UBehaviorTreeComponent>(BrainComponent);
if (BTComp == NULL)
{
UE_VLOG(this, LogBehaviorTree, Log, TEXT("RunBehaviorTree: spawning BehaviorTreeComponent.."));
BrainComponent = BTComp = ConstructObject<UBehaviorTreeComponent>(UBehaviorTreeComponent::StaticClass(), this, TEXT("BTComponent"));
BrainComponent->RegisterComponent();
}
check(BTComp != NULL);
BTComp->StartTree(*BTAsset, EBTExecutionMode::Looped);
}
return bSuccess;
}
