GASCharacter.cpp

#include "GASCharacter.h"
#include "HeadMountedDisplayFunctionLibrary.h"
#include "Camera/CameraComponent.h"
#include "Components/CapsuleComponent.h"
#include "Components/InputComponent.h"
#include "GameFramework/CharacterMovementComponent.h"
#include "GameFramework/Controller.h"
#include "GameFramework/SpringArmComponent.h"
#include "GASAbilitySystemComponent.h"
#include "GASAttributeSet.h"
#include "AbilitySystemGlobals.h"
#include "GASGameplayAbility.h"
#include <GameplayEffectTypes.h>

//////////////////////////////////////////////////////////////////////////
// AGASCharacter

AGASCharacter::AGASCharacter()
{
    // Set size for collision capsule
    GetCapsuleComponent()->InitCapsuleSize(42.f, 96.0f);

    // set our turn rates for input
    BaseTurnRate = 45.f;
    BaseLookUpRate = 45.f;

    // Don't rotate when the controller rotates. Let that just affect the camera.
    bUseControllerRotationPitch = false;
    bUseControllerRotationYaw = false;
    bUseControllerRotationRoll = false;

    // Configure character movement
    GetCharacterMovement()->bOrientRotationToMovement = true; // Character moves in the direction of input...
    GetCharacterMovement()->RotationRate = FRotator(0.0f, 540.0f, 0.0f); // ...at this rotation rate
    GetCharacterMovement()->JumpZVelocity = 600.f;
    GetCharacterMovement()->AirControl = 0.2f;

    // Create a camera boom (pulls in towards the player if there is a collision)
    CameraBoom = CreateDefaultSubobject<USpringArmComponent>(TEXT("CameraBoom"));
    CameraBoom->SetupAttachment(RootComponent);
    CameraBoom->TargetArmLength = 300.0f; // The camera follows at this distance behind the character
    CameraBoom->bUsePawnControlRotation = true; // Rotate the arm based on the controller

    // Create a follow camera
    FollowCamera = CreateDefaultSubobject<UCameraComponent>(TEXT("FollowCamera"));
    FollowCamera->SetupAttachment(CameraBoom, USpringArmComponent::SocketName); // Attach the camera to the end of the boom and let the boom adjust to match the controller orientation
    FollowCamera->bUsePawnControlRotation = false; // Camera does not rotate relative to arm

    AbilitySystemComponent = CreateDefaultSubobject<UGASAbilitySystemComponent>("AbilitySystemComp");
    AbilitySystemComponent->SetIsReplicated(true);
    AbilitySystemComponent->SetReplicationMode(EGameplayEffectReplicationMode::Minimal);

    Attributes = CreateDefaultSubobject<UGASAttributeSet>("Attributes");

    // Note: The skeletal mesh and anim blueprint references on the Mesh component (inherited from Character)
    // are set in the derived blueprint asset named MyCharacter (to avoid direct content references in C++)
}

class UAbilitySystemComponent* AGASCharacter::GetAbilitySystemComponent() const
{
    return AbilitySystemComponent;
}

void AGASCharacter::InitializeAttributes()
{
    if (AbilitySystemComponent && DefaultAttributeEffect)
    {
        FGameplayEffectContextHandle EffectContext = AbilitySystemComponent->MakeEffectContext();
        EffectContext.AddSourceObject(this);

        FGameplayEffectSpecHandle SpecHandle = AbilitySystemComponent->MakeOutgoingSpec(DefaultAttributeEffect, 1, EffectContext);

        if (SpecHandle.IsValid())
        {
            FActiveGameplayEffectHandle GEHandle = AbilitySystemComponent->ApplyGameplayEffectSpecToSelf(*SpecHandle.Data.Get());
        }
    }
}

void AGASCharacter::GiveAbilities()
{
    if (HasAuthority() && AbilitySystemComponent)
    {
        for (TSubclassOf<UGASGameplayAbility>& StartupAbility : DefaultAbilities)
        {
            AbilitySystemComponent->GiveAbility(
                FGameplayAbilitySpec(StartupAbility, 1, static_cast<int32>(StartupAbility.GetDefaultObject()->AbilityInputID), this));
        }
    }
}

void AGASCharacter::PossessedBy(AController* NewController)
{
    Super::PossessedBy(NewController);

    //Server GAS init
    AbilitySystemComponent->InitAbilityActorInfo(this, this);

    InitializeAttributes();
    GiveAbilities();
}

void AGASCharacter::OnRep_PlayerState()
{
    Super::OnRep_PlayerState();

    AbilitySystemComponent->InitAbilityActorInfo(this, this);
    InitializeAttributes();

}

//////////////////////////////////////////////////////////////////////////
// Input

void AGASCharacter::SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent)
{
    // Set up gameplay key bindings
    check(PlayerInputComponent);
    PlayerInputComponent->BindAction("Jump", IE_Pressed, this, &ACharacter::Jump);
    PlayerInputComponent->BindAction("Jump", IE_Released, this, &ACharacter::StopJumping);

    PlayerInputComponent->BindAxis("MoveForward", this, &AGASCharacter::MoveForward);
    PlayerInputComponent->BindAxis("MoveRight", this, &AGASCharacter::MoveRight);

    // We have 2 versions of the rotation bindings to handle different kinds of devices differently
    // "turn" handles devices that provide an absolute delta, such as a mouse.
    // "turnrate" is for devices that we choose to treat as a rate of change, such as an analog joystick
    PlayerInputComponent->BindAxis("Turn", this, &APawn::AddControllerYawInput);
    PlayerInputComponent->BindAxis("TurnRate", this, &AGASCharacter::TurnAtRate);
    PlayerInputComponent->BindAxis("LookUp", this, &APawn::AddControllerPitchInput);
    PlayerInputComponent->BindAxis("LookUpRate", this, &AGASCharacter::LookUpAtRate);

    // handle touch devices
    PlayerInputComponent->BindTouch(IE_Pressed, this, &AGASCharacter::TouchStarted);
    PlayerInputComponent->BindTouch(IE_Released, this, &AGASCharacter::TouchStopped);

    // VR headset functionality
    PlayerInputComponent->BindAction("ResetVR", IE_Pressed, this, &AGASCharacter::OnResetVR);

    if (AbilitySystemComponent && InputComponent)
    {
        const FGameplayAbilityInputBinds Binds("Confirm", "Cancel", "EGASAbilityInputID", static_cast<int32>(EGASAbilityInputID::Confirm), static_cast<int32>(EGASAbilityInputID::Cancel));
        AbilitySystemComponent->BindAbilityActivationToInputComponent(InputComponent, Binds);
    }
}


void AGASCharacter::OnResetVR()
{
    UHeadMountedDisplayFunctionLibrary::ResetOrientationAndPosition();
}

void AGASCharacter::TouchStarted(ETouchIndex::Type FingerIndex, FVector Location)
{
        Jump();
}

void AGASCharacter::TouchStopped(ETouchIndex::Type FingerIndex, FVector Location)
{
        StopJumping();
}

void AGASCharacter::TurnAtRate(float Rate)
{
    // calculate delta for this frame from the rate information
    AddControllerYawInput(Rate * BaseTurnRate * GetWorld()->GetDeltaSeconds());
}

void AGASCharacter::LookUpAtRate(float Rate)
{
    // calculate delta for this frame from the rate information
    AddControllerPitchInput(Rate * BaseLookUpRate * GetWorld()->GetDeltaSeconds());
}

void AGASCharacter::MoveForward(float Value)
{
    if ((Controller != NULL) && (Value != 0.0f))
    {
        // find out which way is forward
        const FRotator Rotation = Controller->GetControlRotation();
        const FRotator YawRotation(0, Rotation.Yaw, 0);

        // get forward vector
        const FVector Direction = FRotationMatrix(YawRotation).GetUnitAxis(EAxis::X);
        AddMovementInput(Direction, Value);
    }
}

void AGASCharacter::MoveRight(float Value)
{
    if ( (Controller != NULL) && (Value != 0.0f) )
    {
        // find out which way is right
        const FRotator Rotation = Controller->GetControlRotation();
        const FRotator YawRotation(0, Rotation.Yaw, 0);

        // get right vector
        const FVector Direction = FRotationMatrix(YawRotation).GetUnitAxis(EAxis::Y);
        // add movement in that direction
        AddMovementInput(Direction, Value);
    }
}