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Added AI Perception implementation, removed Pawn Sensing. #50

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Added AI Perception implementation, removed Pawn Sensing. #50

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3 changes: 1 addition & 2 deletions .gitignore
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Expand Up @@ -8,8 +8,7 @@ Saved
*.pdb
*.exe
*-DebugGame.dll
SurvivalGame/Binaries/Win64/SurvivalGame.exp
SurvivalGame/Binaries/Win64/SurvivalGame.lib
SurvivalGame/Binaries
SurvivalGame/Releases
*.log
*.target.xml
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Binary file removed SurvivalGame/Binaries/Win64/UE4Editor-SurvivalGame.dll
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51 changes: 51 additions & 0 deletions SurvivalGame/Source/SurvivalGame/Private/AI/SZombieAIController.cpp
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Expand Up @@ -5,6 +5,9 @@
#include "SZombieCharacter.h"

/* AI Specific includes */
#include "Perception/AISenseConfig_Sight.h"
#include "Perception/AISenseConfig_Hearing.h"
#include "Perception/AIPerceptionComponent.h"
#include "BehaviorTree/BehaviorTree.h"
#include "BehaviorTree/BehaviorTreeComponent.h"
#include "BehaviorTree/BlackboardComponent.h"
Expand All @@ -16,6 +19,30 @@ ASZombieAIController::ASZombieAIController(const class FObjectInitializer& Objec
BehaviorComp = ObjectInitializer.CreateDefaultSubobject<UBehaviorTreeComponent>(this, TEXT("BehaviorComp"));
BlackboardComp = ObjectInitializer.CreateDefaultSubobject<UBlackboardComponent>(this, TEXT("BlackboardComp"));

/* Setup sight sense config */
UAISenseConfig_Sight* SightConfig = ObjectInitializer.CreateDefaultSubobject<UAISenseConfig_Sight>(this, TEXT("Sight Config"));
SightConfig->SightRadius = 2000;
SightConfig->LoseSightRadius = 2500;
SightConfig->PeripheralVisionAngleDegrees = 60.0f;
SightConfig->DetectionByAffiliation.bDetectEnemies = true;
SightConfig->SetMaxAge(2.5f);

/* Setup hearing sense config */
UAISenseConfig_Hearing* HearingConfig = ObjectInitializer.CreateDefaultSubobject<UAISenseConfig_Hearing>(this, TEXT("Hearing Config"));
HearingConfig->HearingRange = 600.0f;
HearingConfig->LoSHearingRange = 1200.0f;
HearingConfig->DetectionByAffiliation.bDetectEnemies = true;
HearingConfig->DetectionByAffiliation.bDetectFriendlies = true;
HearingConfig->SetMaxAge(2.5f);

/* Configure AI perception */
UAIPerceptionComponent* AIPerceptionComp = CreateDefaultSubobject<UAIPerceptionComponent>(TEXT("AIPerceptionComp"));
AIPerceptionComp->OnTargetPerceptionUpdated.AddDynamic(this, &ASZombieAIController::OnTargetPerceptionUpdated);
AIPerceptionComp->ConfigureSense(*SightConfig);
AIPerceptionComp->SetDominantSense(SightConfig->GetSenseImplementation());
AIPerceptionComp->ConfigureSense(*HearingConfig);
SetPerceptionComponent(*AIPerceptionComp);

/* Match with the AI/ZombieBlackboard */
PatrolLocationKeyName = "PatrolLocation";
CurrentWaypointKeyName = "CurrentWaypoint";
Expand Down Expand Up @@ -56,6 +83,24 @@ void ASZombieAIController::UnPossess()
}


void ASZombieAIController::OnTargetPerceptionUpdated(AActor* Actor, FAIStimulus Stimulus)
{
ASBaseCharacter* Target = Cast<ASBaseCharacter>(Actor);

if (Target && (!Target->IsAlive() || !Stimulus.IsActive()))
{
Target = nullptr;
}

SetTargetEnemy(Target);
ASZombieCharacter* ZombieBot = Cast<ASZombieCharacter>(GetPawn());
if (ZombieBot)
{
ZombieBot->SetSensedTarget(Target ? true : false);
}
}


void ASZombieAIController::SetWaypoint(ASBotWaypoint* NewWaypoint)
{
if (BlackboardComp)
Expand Down Expand Up @@ -103,3 +148,9 @@ void ASZombieAIController::SetBlackboardBotType(EBotBehaviorType NewType)
BlackboardComp->SetValueAsEnum(BotTypeKeyName, (uint8)NewType);
}
}


ETeamAttitude::Type ASZombieAIController::GetTeamAttitudeTowards(const AActor & Other) const
{
return Cast<ASCharacter>(&Other) ? ETeamAttitude::Type::Hostile : ETeamAttitude::Type::Friendly;
}
101 changes: 15 additions & 86 deletions SurvivalGame/Source/SurvivalGame/Private/AI/SZombieCharacter.cpp
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Expand Up @@ -8,9 +8,6 @@
#include "SBotWaypoint.h"
#include "SPlayerState.h"

/* AI Include */
#include "Perception/PawnSensingComponent.h"

// Sets default values
ASZombieCharacter::ASZombieCharacter(const class FObjectInitializer& ObjectInitializer)
: Super(ObjectInitializer)
Expand All @@ -19,12 +16,10 @@ ASZombieCharacter::ASZombieCharacter(const class FObjectInitializer& ObjectIniti
Because the zombie AIController is a blueprint in content and it's better to avoid content references in code. */
/*AIControllerClass = ASZombieAIController::StaticClass();*/

/* Our sensing component to detect players by visibility and noise checks. */
PawnSensingComp = CreateDefaultSubobject<UPawnSensingComponent>(TEXT("PawnSensingComp"));
PawnSensingComp->SetPeripheralVisionAngle(60.0f);
PawnSensingComp->SightRadius = 2000;
PawnSensingComp->HearingThreshold = 600;
PawnSensingComp->LOSHearingThreshold = 1200;
/* Ignore this channel or it will absorb the trace impacts instead of the skeletal mesh */
GetCapsuleComponent()->SetCollisionResponseToChannel(COLLISION_WEAPON, ECR_Ignore);
GetCapsuleComponent()->SetCapsuleHalfHeight(96.0f, false);
GetCapsuleComponent()->SetCapsuleRadius(42.0f);

/* Ignore this channel or it will absorb the trace impacts instead of the skeletal mesh */
GetCapsuleComponent()->SetCollisionResponseToChannel(COLLISION_WEAPON, ECR_Ignore);
Expand Down Expand Up @@ -55,7 +50,6 @@ ASZombieCharacter::ASZombieCharacter(const class FObjectInitializer& ObjectIniti

/* By default we will not let the AI patrol, we can override this value per-instance. */
BotType = EBotBehaviorType::Passive;
SenseTimeOut = 2.5f;

/* Note: Visual Setup is done in the AI/ZombieCharacter Blueprint file */
}
Expand All @@ -65,12 +59,6 @@ void ASZombieCharacter::BeginPlay()
{
Super::BeginPlay();

/* This is the earliest moment we can bind our delegates to the component */
if (PawnSensingComp)
{
PawnSensingComp->OnSeePawn.AddDynamic(this, &ASZombieCharacter::OnSeePlayer);
PawnSensingComp->OnHearNoise.AddDynamic(this, &ASZombieCharacter::OnHearNoise);
}
if (MeleeCollisionComp)
{
MeleeCollisionComp->OnComponentBeginOverlap.AddDynamic(this, &ASZombieCharacter::OnMeleeCompBeginOverlap);
Expand All @@ -88,76 +76,6 @@ void ASZombieCharacter::BeginPlay()
}


void ASZombieCharacter::Tick(float DeltaSeconds)
{
Super::Tick(DeltaSeconds);

/* Check if the last time we sensed a player is beyond the time out value to prevent bot from endlessly following a player. */
if (bSensedTarget && (GetWorld()->TimeSeconds - LastSeenTime) > SenseTimeOut
&& (GetWorld()->TimeSeconds - LastHeardTime) > SenseTimeOut)
{
ASZombieAIController* AIController = Cast<ASZombieAIController>(GetController());
if (AIController)
{
bSensedTarget = false;
/* Reset */
AIController->SetTargetEnemy(nullptr);

/* Stop playing the hunting sound */
BroadcastUpdateAudioLoop(false);
}
}
}


void ASZombieCharacter::OnSeePlayer(APawn* Pawn)
{
if (!IsAlive())
{
return;
}

if (!bSensedTarget)
{
BroadcastUpdateAudioLoop(true);
}

/* Keep track of the time the player was last sensed in order to clear the target */
LastSeenTime = GetWorld()->GetTimeSeconds();
bSensedTarget = true;

ASZombieAIController* AIController = Cast<ASZombieAIController>(GetController());
ASBaseCharacter* SensedPawn = Cast<ASBaseCharacter>(Pawn);
if (AIController && SensedPawn->IsAlive())
{
AIController->SetTargetEnemy(SensedPawn);
}
}


void ASZombieCharacter::OnHearNoise(APawn* PawnInstigator, const FVector& Location, float Volume)
{
if (!IsAlive())
{
return;
}

if (!bSensedTarget)
{
BroadcastUpdateAudioLoop(true);
}

bSensedTarget = true;
LastHeardTime = GetWorld()->GetTimeSeconds();

ASZombieAIController* AIController = Cast<ASZombieAIController>(GetController());
if (AIController)
{
AIController->SetTargetEnemy(PawnInstigator);
}
}


void ASZombieCharacter::PerformMeleeStrike(AActor* HitActor)
{
if (LastMeleeAttackTime > GetWorld()->GetTimeSeconds() - MeleeStrikeCooldown)
Expand Down Expand Up @@ -290,6 +208,17 @@ bool ASZombieCharacter::IsSprinting() const
}


void ASZombieCharacter::SetSensedTarget(bool bNewSensedTarget)
{
if (bSensedTarget != bNewSensedTarget)
{
BroadcastUpdateAudioLoop(bSensedTarget);
}

bSensedTarget = bNewSensedTarget;
}


void ASZombieCharacter::BroadcastUpdateAudioLoop_Implementation(bool bNewSensedTarget)
{
/* Start playing the hunting sound and the "noticed player" sound if the state is about to change */
Expand Down
4 changes: 0 additions & 4 deletions SurvivalGame/Source/SurvivalGame/Private/Player/SBaseCharacter.cpp
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Expand Up @@ -6,7 +6,6 @@
#include "SCharacterMovementComponent.h"
#include "SDamageType.h"


ASBaseCharacter::ASBaseCharacter(const class FObjectInitializer& ObjectInitializer)
/* Override the movement class from the base class to our own to support multiple speeds (eg. sprinting) */
: Super(ObjectInitializer.SetDefaultSubobjectClass<USCharacterMovementComponent>(ACharacter::CharacterMovementComponentName))
Expand All @@ -16,9 +15,6 @@ ASBaseCharacter::ASBaseCharacter(const class FObjectInitializer& ObjectInitializ
TargetingSpeedModifier = 0.5f;
SprintingSpeedModifier = 2.0f;

/* Noise emitter for both players and enemies. This keeps track of MakeNoise data and is used by the pawnsensing component in our SZombieCharacter class */
NoiseEmitterComp = CreateDefaultSubobject<UPawnNoiseEmitterComponent>(TEXT("NoiseEmitterComp"));

/* Don't collide with camera checks to keep 3rd person camera at position when zombies or other players are standing behind us */
GetMesh()->SetCollisionResponseToChannel(ECC_Camera, ECR_Ignore);
GetCapsuleComponent()->SetCollisionResponseToChannel(ECC_Camera, ECR_Ignore);
Expand Down
9 changes: 8 additions & 1 deletion SurvivalGame/Source/SurvivalGame/Public/AI/SZombieAIController.h
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Expand Up @@ -5,6 +5,7 @@
#include "AIController.h"
#include "SCharacter.h"
#include "SBotWaypoint.h"
#include "Perception/AIPerceptionTypes.h"
#include "SZombieAIController.generated.h"

class UBehaviorTreeComponent;
Expand All @@ -24,6 +25,13 @@ class SURVIVALGAME_API ASZombieAIController : public AAIController

virtual void UnPossess() override;

/* Called whenever AI stimulus is updated */
UFUNCTION()
void OnTargetPerceptionUpdated(AActor* Actor, FAIStimulus Stimulus);

/* Used to determine whether or not an actor is hostile or friendly */
virtual ETeamAttitude::Type GetTeamAttitudeTowards(const AActor& Other) const override;

UBehaviorTreeComponent* BehaviorComp;

UBlackboardComponent* BlackboardComp;
Expand All @@ -41,7 +49,6 @@ class SURVIVALGAME_API ASZombieAIController : public AAIController
FName BotTypeKeyName;

public:

ASBotWaypoint* GetWaypoint();

ASBaseCharacter* GetTargetEnemy();
Expand Down
25 changes: 2 additions & 23 deletions SurvivalGame/Source/SurvivalGame/Public/AI/SZombieCharacter.h
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Expand Up @@ -10,41 +10,18 @@ class SURVIVALGAME_API ASZombieCharacter : public ASBaseCharacter
{
GENERATED_BODY()

/* Last time the player was spotted */
float LastSeenTime;

/* Last time the player was heard */
float LastHeardTime;

/* Last time we attacked something */
float LastMeleeAttackTime;

/* Time-out value to clear the sensed position of the player. Should be higher than Sense interval in the PawnSense component not never miss sense ticks. */
UPROPERTY(EditDefaultsOnly, Category = "AI")
float SenseTimeOut;

/* Resets after sense time-out to avoid unnecessary clearing of target each tick */
bool bSensedTarget;

UPROPERTY(VisibleAnywhere, Category = "AI")
class UPawnSensingComponent* PawnSensingComp;

virtual void BeginPlay() override;

virtual void Tick(float DeltaSeconds) override;

protected:

virtual bool IsSprinting() const override;

/* Triggered by pawn sensing component when a pawn is spotted */
/* When using functions as delegates they need to be marked with UFUNCTION(). We assign this function to FSeePawnDelegate */
UFUNCTION()
void OnSeePlayer(APawn* Pawn);

UFUNCTION()
void OnHearNoise(APawn* PawnInstigator, const FVector& Location, float Volume);

UPROPERTY(VisibleAnywhere, Category = "Attacking")
UCapsuleComponent* MeleeCollisionComp;

Expand Down Expand Up @@ -125,4 +102,6 @@ class SURVIVALGAME_API ASZombieCharacter : public ASBaseCharacter

/* Change default bot type during gameplay */
void SetBotType(EBotBehaviorType NewType);

void SetSensedTarget(bool bNewSensedTarget);
};
3 changes: 0 additions & 3 deletions SurvivalGame/Source/SurvivalGame/Public/Player/SBaseCharacter.h
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Expand Up @@ -11,9 +11,6 @@ class SURVIVALGAME_API ASBaseCharacter : public ACharacter
{
GENERATED_BODY()

/* Tracks noise data used by the pawn sensing component */
UPawnNoiseEmitterComponent* NoiseEmitterComp;

public:
// Sets default values for this character's properties
ASBaseCharacter(const class FObjectInitializer& ObjectInitializer);
Expand Down