// execution
EBTNodeResult::Type UAIE_GoToRandom_BTTaskNode::ExecuteTask(UBehaviorTreeComponent& OwnerComp, uint8* NodeMemory) {
/* call super
* should aquire refrences for our BehaviorTreeComp, BlackboardComp, AIController, and BotCharacter
* will return EBTNodeResult::Succeeded if we have all of them
* will return EBTNodeResult::Failed if it failed to grab any of them
*/
EBTNodeResult::Type resultFromSuperExecution = Super::ExecuteTask(OwnerComp, NodeMemory);
// check that we successfully grabbed the BehaviorTreeComp, BlackboardComp, AIController, and BotCharacter
if (resultFromSuperExecution == EBTNodeResult::Succeeded) {
// check that we can get the World
if (GetWorld()) {
// get the current nav system from the world
UNavigationSystem* navSystem = UNavigationSystem::GetCurrent(GetWorld());
// check that we have a nav system
if (navSystem) {
// get our actors current location to pe used as our start position
FVector startPosi = BotCharacter->GetActorLocation();
// create a nav location to be used as our end position
// default will be set to our current position in case of failure to find a suitable end position
FNavLocation endPosi = FNavLocation(startPosi);
// attempt to get a random new position
if (navSystem->GetRandomReachablePointInRadius(startPosi, searchRadius, endPosi)) {
// if we were successfull in finding a new location get the MoveToLocation BlackboardKeyID
FBlackboard::FKey BlackboardKey_MoveToLocation = Blackboard->GetKeyID("MoveToLocation");
// check that we got the key
if ( Blackboard->IsValidKey( BlackboardKey_MoveToLocation)) {
// set the MoveToLocation BlackboardKeyID to our new location
Blackboard->SetValue<UBlackboardKeyType_Vector>(BlackboardKey_MoveToLocation, endPosi.Location);
// return succeeded now that we have set up our new loacation
return EBTNodeResult::Succeeded;
}
else {
// return Aborted if we can't find the Key as it will never succeed without a proper Key
if (bForceSuccess) {
return EBTNodeResult::Succeeded;
}
return EBTNodeResult::Aborted;
}
}
// return in progress if their are currently no valid locations
if (bForceSuccess) {
return EBTNodeResult::Succeeded;
}
return EBTNodeResult::InProgress;
}
}
}
// we will only get here if execution fails so we will check if force success is on
if (bForceSuccess) {
// if force success is on we will return Succeeded anyway
return EBTNodeResult::Succeeded;
}
// we want to return Failed after the force success check
return EBTNodeResult::Failed;
}
