【UE】GAS入门（一）创建Ability

企业开发 2023-04-17 04:26:13 阅读次数: 0

GameAbilitySystem入门记录（一）

目录

0、建议准备工作

①下载Github上的GASDocumentation（UE 4.26.2）或UE商场中自带的ActionRPG项目（图一的两个项目）
②下载中文版文档


1、启用GAS

1.1 新建项目

本文主要用以学习记录。版本使用的是4.26.2。项目时间是2022.7.21。

111
112
113

1.2 启用GAS插件

121
122

1.3 验证GAS有效性

132
此处存有GameplayCue Editor的话说明启用成功
131
此处存在Gameplay Ability Blueprint的话，也说明已经启用成功

1.4 声明GAS项目

由于我们创建的是C++的UE项目

1.4.1 打开 xxxx.Build.cs

1411
添加上述 3个 完成项目的GAS声明



2、能“HelloWorld”的Ability

万事皆有HelloWorld，GAS也不例外。

2.1 创建“能够HelloWorld”的Ability

211
214

在内容浏览器中，新建一个GA BP，命名为GA_testHello。
212
双击进入，添加一个PrintString作为Helloworld的动作
213
（此处print的是一个“Action”）

3、为Character启用ASC

GAS的最终目的就是让玩家发出技能，而玩家控制的便是——Character。因此需要为Character添加ASC（Ability System Component）。

3.1 从Character.h和Character.cpp入手

因为我们在1.1创建项目的时候已经选择了带有初学者包，也就是说项目创建之初便带有一个默认的Character。

311
打开VS项目，右侧的资源管理器就记载了我们的代码。其中，项目名+Character.h和项目名+Character.cpp便是我们要添加ASC的Character。

3.2 修改Character.h

打开.h文件后，需要更改几处代码：
①头文件部分

#include "AbilitySystemInterface.h"
#include "AbilitySystemComponent.h"

注意，#include "learnUe_0720Character.generated.h"这个头文件必须在最后一个引用，否则会报错：
321
添加如下即可：
323


②添加IAbilitySystemInterface接口

322
在 .h文件的第一个Public中添加如下代码 声明ASC ：

	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = GameplayAbilities,meta = (AllowPrivateAccess = "true"))
	class UAbilitySystemComponent* AbilitySystem;
	
	UAbilitySystemComponent* GetAbilitySystemComponent()const override;

即如下图所示
在这里插入图片描述
添加完 .h文件，下一步当然是添加 .cpp文件


3.3 修改Character.cpp

①在文件的末尾添加如下代码：

UAbilitySystemComponent* AlearnUe_0720Character::GetAbilitySystemComponent() const
{
    
    
	return AbilitySystem;
}

该函数是用来实现 h文件中3.2最后添加的UAbilitySystemComponent* GetAbilitySystemComponent()const override;

此时，可以回到UE项目中编译一下，如果编译通过，那么可以继续。

如果编译成功，可以看到我们的Character上面多了ASC：
在这里插入图片描述

4、代码备份

4.1 Character.h

// Copyright Epic Games, Inc. All Rights Reserved.

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Character.h"
//添加引用
#include "AbilitySystemInterface.h"
#include "AbilitySystemComponent.h"
//最后引用
#include "learnUe_0720Character.generated.h"


UCLASS(config=Game)
class AlearnUe_0720Character : public ACharacter , public IAbilitySystemInterface  //修改：添加接口
{
    
    
	GENERATED_BODY()

	/** Camera boom positioning the camera behind the character */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Camera, meta = (AllowPrivateAccess = "true"))
	class USpringArmComponent* CameraBoom;

	/** Follow camera */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Camera, meta = (AllowPrivateAccess = "true"))
	class UCameraComponent* FollowCamera;
public:
	AlearnUe_0720Character();
	
	//modi: 声明ASC		设置为Private后蓝图是无法读取的，因此需要meta设置为true才可以被蓝图看到
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = GameplayAbilities,meta = (AllowPrivateAccess = "true"))
	class UAbilitySystemComponent* AbilitySystem;

	//modi:添加一个返回此组件的方法
	UAbilitySystemComponent* GetAbilitySystemComponent()const override;

	/** Base turn rate, in deg/sec. Other scaling may affect final turn rate. */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Camera)
	float BaseTurnRate;

	/** Base look up/down rate, in deg/sec. Other scaling may affect final rate. */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Camera)
	float BaseLookUpRate;

protected:

	/** Resets HMD orientation in VR. */
	void OnResetVR();

	/** Called for forwards/backward input */
	void MoveForward(float Value);

	/** Called for side to side input */
	void MoveRight(float Value);

	/** 
	 * Called via input to turn at a given rate. 
	 * @param Rate	This is a normalized rate, i.e. 1.0 means 100% of desired turn rate
	 */
	void TurnAtRate(float Rate);

	/**
	 * Called via input to turn look up/down at a given rate. 
	 * @param Rate	This is a normalized rate, i.e. 1.0 means 100% of desired turn rate
	 */
	void LookUpAtRate(float Rate);

	/** Handler for when a touch input begins. */
	void TouchStarted(ETouchIndex::Type FingerIndex, FVector Location);

	/** Handler for when a touch input stops. */
	void TouchStopped(ETouchIndex::Type FingerIndex, FVector Location);

protected:
	// APawn interface
	virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;
	// End of APawn interface

	//TWeakObjectPtr<class UGDAbilitySystemComponent> AbilitySystemComponent;

public:
	/** Returns CameraBoom subobject **/
	FORCEINLINE class USpringArmComponent* GetCameraBoom() const {
    
     return CameraBoom; }
	/** Returns FollowCamera subobject **/
	FORCEINLINE class UCameraComponent* GetFollowCamera() const {
    
     return FollowCamera; }

};

4.2 Character.cpp

// Copyright Epic Games, Inc. All Rights Reserved.


#include "learnUe_0720Character.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"


//
// AlearnUe_0720Character

AlearnUe_0720Character::AlearnUe_0720Character()
{
    
    
	// 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


	AbilitySystem = CreateDefaultSubobject<UAbilitySystemComponent>(TEXT("AbilitySystemLearn"));
	// 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++)
}

//
// Input

void AlearnUe_0720Character::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, &AlearnUe_0720Character::MoveForward);
	PlayerInputComponent->BindAxis("MoveRight", this, &AlearnUe_0720Character::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, &AlearnUe_0720Character::TurnAtRate);
	PlayerInputComponent->BindAxis("LookUp", this, &APawn::AddControllerPitchInput);
	PlayerInputComponent->BindAxis("LookUpRate", this, &AlearnUe_0720Character::LookUpAtRate);

	// handle touch devices
	PlayerInputComponent->BindTouch(IE_Pressed, this, &AlearnUe_0720Character::TouchStarted);
	PlayerInputComponent->BindTouch(IE_Released, this, &AlearnUe_0720Character::TouchStopped);

	// VR headset functionality
	PlayerInputComponent->BindAction("ResetVR", IE_Pressed, this, &AlearnUe_0720Character::OnResetVR);
}


void AlearnUe_0720Character::OnResetVR()
{
    
    
	// If learnUe_0720 is added to a project via 'Add Feature' in the Unreal Editor the dependency on HeadMountedDisplay in learnUe_0720.Build.cs is not automatically propagated
	// and a linker error will result.
	// You will need to either:
	//		Add "HeadMountedDisplay" to [YourProject].Build.cs PublicDependencyModuleNames in order to build successfully (appropriate if supporting VR).
	// or:
	//		Comment or delete the call to ResetOrientationAndPosition below (appropriate if not supporting VR)
	UHeadMountedDisplayFunctionLibrary::ResetOrientationAndPosition();
}

void AlearnUe_0720Character::TouchStarted(ETouchIndex::Type FingerIndex, FVector Location)
{
    
    
		Jump();
}

void AlearnUe_0720Character::TouchStopped(ETouchIndex::Type FingerIndex, FVector Location)
{
    
    
		StopJumping();
}

void AlearnUe_0720Character::TurnAtRate(float Rate)
{
    
    
	// calculate delta for this frame from the rate information
	AddControllerYawInput(Rate * BaseTurnRate * GetWorld()->GetDeltaSeconds());
}

void AlearnUe_0720Character::LookUpAtRate(float Rate)
{
    
    
	// calculate delta for this frame from the rate information
	AddControllerPitchInput(Rate * BaseLookUpRate * GetWorld()->GetDeltaSeconds());
}

void AlearnUe_0720Character::MoveForward(float Value)
{
    
    
	if ((Controller != nullptr) && (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 AlearnUe_0720Character::MoveRight(float Value)
{
    
    
	if ( (Controller != nullptr) && (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);
	}
}


UAbilitySystemComponent* AlearnUe_0720Character::GetAbilitySystemComponent() const
{
    
    
	return AbilitySystem;
}



5、发动技能

5.1 声明并实现Abilities

注意这里是Abilities（复数），因此需要使用 For 循环来声明，确保不漏掉技能。

①在 Character.h文件的public中声明我们的技能数组：

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Abilities)
		TArray<TSubclassOf<class UGameplayAbility>>GA_testHello;

在这里插入图片描述
②在 Character.h文件的protected中声明我们的Beginplay

virtual void BeginPlay() override;

在这里插入图片描述

③在Character.cpp文件中，实现我们声明的Beginplay

void AlearnUe_0720Character::BeginPlay()
{
    
    
	Super::BeginPlay();
	if (AbilitySystem == nullptr)return;
	UE_LOG(LogTemp, Warning, TEXT("%s"), *FString("Char Beginplay 97"));
	if (HasAuthority() && GA_testHello.Num()) {
    
    
		UE_LOG(LogTemp, Warning, TEXT("%s"), *FString("Char Beginplay 99"));
		for (auto i = 0; i < GA_testHello.Num(); i++) {
    
    
			if (GA_testHello[i] == nullptr)continue;
			AbilitySystem->GiveAbility(FGameplayAbilitySpec(GA_testHello[i].GetDefaultObject(), 1, 0));
			UE_LOG(LogTemp, Warning, TEXT("%s"), *FString("103_BP we regiter an ability"));
		}
		UE_LOG(LogTemp, Warning, TEXT("%s"), *FString("All abilities Registered"))
	}
	AbilitySystem->InitAbilityActorInfo(this, this);

	UE_LOG(LogTemp, Warning, TEXT("%s"), *FString("Char Beginplay 105"));

}

上述代码放在cpp中即可，如下图所示：
在这里插入图片描述

5.2 新建技能（用以激活“能够Helloworld的”那个技能）

现在我们只有一个Gameplay Ability，而且还是用于演示如何创建GA BP。
现在我们要让技能丰富起来，新建一个技能GA BP，命名为GA_Fire1。
在这里插入图片描述

5.3 激活技能

注意5.1 、 5.2 、 5.3 的标题的区别。
激活技能，当然是玩家来操作的，而玩家，则需要通过按键输入来控制。因此我们新建一个Action：
打开Project Setting → Input
在这里插入图片描述

然后返回Character并且编辑蓝图如下：
在这里插入图片描述
之后在右侧“细节”一栏中，选择我们添加的GA_Fire1。我这里没有，根据自己的GA添加就好了（如下）。
在这里插入图片描述
在这里插入图片描述

6、释放技能

上述步骤都完成后，按Q释放技能，效果图如下：
在这里插入图片描述

完成！

7、代码备份

7.1 Character.h

// Copyright Epic Games, Inc. All Rights Reserved.

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Character.h"
//添加引用
#include "AbilitySystemInterface.h"
#include "AbilitySystemComponent.h"
//最后引用
#include "learnUe_0720Character.generated.h"


UCLASS(config=Game)
class AlearnUe_0720Character : public ACharacter , public IAbilitySystemInterface  //修改：添加接口
{
    
    
	GENERATED_BODY()

	/** Camera boom positioning the camera behind the character */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Camera, meta = (AllowPrivateAccess = "true"))
	class USpringArmComponent* CameraBoom;

	/** Follow camera */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Camera, meta = (AllowPrivateAccess = "true"))
	class UCameraComponent* FollowCamera;
public:
	AlearnUe_0720Character();
	
	//modi: 声明ASC		设置为Private后蓝图是无法读取的，因此需要meta设置为true才可以被蓝图看到
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = GameplayAbilities,meta = (AllowPrivateAccess = "true"))
	class UAbilitySystemComponent* AbilitySystem;

	//modi:添加一个返回此组件的方法
	UAbilitySystemComponent* GetAbilitySystemComponent()const override;

	//modi:添加Ability  暴露给蓝图方便蓝图调用
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Abilities)
		TArray<TSubclassOf<class UGameplayAbility>>GA_testHello;


	实现接口方法
	//virtual UAbilitySystemComponent* GetAbilitySystemComponent()const override;
	生命Ability数组
	//UPROPERTY(EditAnywhere,BlueprintReadWrite, Category = Abilities)
	//TArray<TSubclassOf<UGameplayAbility>> MyAbilities;


	/** Base turn rate, in deg/sec. Other scaling may affect final turn rate. */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Camera)
	float BaseTurnRate;

	/** Base look up/down rate, in deg/sec. Other scaling may affect final rate. */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Camera)
	float BaseLookUpRate;

protected:
	//modi：添加Beginplay的声明，在初始的Character上是没有的，需要声明一个Bplay（）方便cpp调用
	virtual void BeginPlay() override;

	/** Resets HMD orientation in VR. */
	void OnResetVR();

	/** Called for forwards/backward input */
	void MoveForward(float Value);

	/** Called for side to side input */
	void MoveRight(float Value);

	/** 
	 * Called via input to turn at a given rate. 
	 * @param Rate	This is a normalized rate, i.e. 1.0 means 100% of desired turn rate
	 */
	void TurnAtRate(float Rate);

	/**
	 * Called via input to turn look up/down at a given rate. 
	 * @param Rate	This is a normalized rate, i.e. 1.0 means 100% of desired turn rate
	 */
	void LookUpAtRate(float Rate);

	/** Handler for when a touch input begins. */
	void TouchStarted(ETouchIndex::Type FingerIndex, FVector Location);

	/** Handler for when a touch input stops. */
	void TouchStopped(ETouchIndex::Type FingerIndex, FVector Location);

protected:
	// APawn interface
	virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;
	// End of APawn interface

	//TWeakObjectPtr<class UGDAbilitySystemComponent> AbilitySystemComponent;

public:
	/** Returns CameraBoom subobject **/
	FORCEINLINE class USpringArmComponent* GetCameraBoom() const {
    
     return CameraBoom; }
	/** Returns FollowCamera subobject **/
	FORCEINLINE class UCameraComponent* GetFollowCamera() const {
    
     return FollowCamera; }


};

7.2 Character.cpp

// Copyright Epic Games, Inc. All Rights Reserved.


#include "learnUe_0720Character.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"


//
// AlearnUe_0720Character

AlearnUe_0720Character::AlearnUe_0720Character()
{
    
    
	// 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


	AbilitySystem = CreateDefaultSubobject<UAbilitySystemComponent>(TEXT("AbilitySystemLearn"));
	// 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++)
}

//
// Input

void AlearnUe_0720Character::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, &AlearnUe_0720Character::MoveForward);
	PlayerInputComponent->BindAxis("MoveRight", this, &AlearnUe_0720Character::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, &AlearnUe_0720Character::TurnAtRate);
	PlayerInputComponent->BindAxis("LookUp", this, &APawn::AddControllerPitchInput);
	PlayerInputComponent->BindAxis("LookUpRate", this, &AlearnUe_0720Character::LookUpAtRate);

	// handle touch devices
	PlayerInputComponent->BindTouch(IE_Pressed, this, &AlearnUe_0720Character::TouchStarted);
	PlayerInputComponent->BindTouch(IE_Released, this, &AlearnUe_0720Character::TouchStopped);

	// VR headset functionality
	PlayerInputComponent->BindAction("ResetVR", IE_Pressed, this, &AlearnUe_0720Character::OnResetVR);
}


void AlearnUe_0720Character::OnResetVR()
{
    
    
	// If learnUe_0720 is added to a project via 'Add Feature' in the Unreal Editor the dependency on HeadMountedDisplay in learnUe_0720.Build.cs is not automatically propagated
	// and a linker error will result.
	// You will need to either:
	//		Add "HeadMountedDisplay" to [YourProject].Build.cs PublicDependencyModuleNames in order to build successfully (appropriate if supporting VR).
	// or:
	//		Comment or delete the call to ResetOrientationAndPosition below (appropriate if not supporting VR)
	UHeadMountedDisplayFunctionLibrary::ResetOrientationAndPosition();
}

void AlearnUe_0720Character::TouchStarted(ETouchIndex::Type FingerIndex, FVector Location)
{
    
    
		Jump();
}

void AlearnUe_0720Character::TouchStopped(ETouchIndex::Type FingerIndex, FVector Location)
{
    
    
		StopJumping();
}

void AlearnUe_0720Character::TurnAtRate(float Rate)
{
    
    
	// calculate delta for this frame from the rate information
	AddControllerYawInput(Rate * BaseTurnRate * GetWorld()->GetDeltaSeconds());
}

void AlearnUe_0720Character::LookUpAtRate(float Rate)
{
    
    
	// calculate delta for this frame from the rate information
	AddControllerPitchInput(Rate * BaseLookUpRate * GetWorld()->GetDeltaSeconds());
}

void AlearnUe_0720Character::MoveForward(float Value)
{
    
    
	if ((Controller != nullptr) && (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 AlearnUe_0720Character::MoveRight(float Value)
{
    
    
	if ( (Controller != nullptr) && (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);
	}
}


//modi:	登记Ability  
void AlearnUe_0720Character::BeginPlay()
{
    
    
	Super::BeginPlay();
	if (AbilitySystem == nullptr)return;
	UE_LOG(LogTemp, Warning, TEXT("%s"), *FString("Char Beginplay 97"));
	if (HasAuthority() && GA_testHello.Num()) {
    
    
		UE_LOG(LogTemp, Warning, TEXT("%s"), *FString("Char Beginplay 99"));
		for (auto i = 0; i < GA_testHello.Num(); i++) {
    
    
			if (GA_testHello[i] == nullptr)continue;
			AbilitySystem->GiveAbility(FGameplayAbilitySpec(GA_testHello[i].GetDefaultObject(), 1, 0));
			UE_LOG(LogTemp, Warning, TEXT("%s"), *FString("103_BP we regiter an ability"));
		}
		UE_LOG(LogTemp, Warning, TEXT("%s"), *FString("All abilities Registered"))
	}
	AbilitySystem->InitAbilityActorInfo(this, this);

	UE_LOG(LogTemp, Warning, TEXT("%s"), *FString("Char Beginplay 105"));

}

UAbilitySystemComponent* AlearnUe_0720Character::GetAbilitySystemComponent() const
{
    
    
	return AbilitySystem;
}

8、补充思考

8.1 Instanced Per Execution 和 Instanced Per Actor 的区别

①新建一个GA_test2
②设置蓝图如下：
在这里插入图片描述
其中，Exc Count为自定义变量，“ ++ ” 蓝图搜索 “ increment Int ”，该蓝图的功能类似：

Exc Count ++;

③ 更改激活技能为GA_test2
④ Instanced Per Actor 效果如下：
在这里插入图片描述

⑤更改为 Instanced Per Execution：
在这里插入图片描述
⑥结果如下：
在这里插入图片描述

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