虚幻C+++基础 day2-编程知识

角色移动与视角控制

Character类与相关API

创建Character子类
MainPlayer.h

// Fill out your copyright notice in the Description page of Project Settings.#pragma once#include "CoreMinimal.h"
#include "GameFramework/Character.h"
#include "MainPlayer.generated.h"UCLASS()
class UEGAME_API AMainPlayer : public ACharacter
{GENERATED_BODY()public:// Sets default values for this character's propertiesAMainPlayer();//新建一个SpringArmUPROPERTY(visibleAnywhere,BlueprintReadOnly)class USpringArmComponent* SpringArm;//新建一个CameraUPROPERTY(visibleAnywhere, BlueprintReadOnly)class UCameraComponent* FollowCamera;protected:// Called when the game starts or when spawnedvirtual void BeginPlay() override;public:	// Called every framevirtual void Tick(float DeltaTime) override;// Called to bind functionality to inputvirtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;};

MianPlayer.cpp

// Fill out your copyright notice in the Description page of Project Settings.#include "MainPlayer.h"
#include "GameFramework/SpringArmComponent.h"
#include "Camera/CameraComponent.h"// Sets default values
AMainPlayer::AMainPlayer()
{// Set this character to call Tick() every frame.  You can turn this off to improve performance if you don't need it.PrimaryActorTick.bCanEverTick = true;SpringArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("SpringArm"));SpringArm->SetupAttachment(GetRootComponent());//设置SPringArm无碰撞臂长SpringArm->TargetArmLength = 600.f;FollowCamera = CreateDefaultSubobject<UCameraComponent>(TEXT("FollowCamera"));FollowCamera->SetupAttachment(SpringArm, NAME_None);}// Called when the game starts or when spawned
void AMainPlayer::BeginPlay()
{Super::BeginPlay();}// Called every frame
void AMainPlayer::Tick(float DeltaTime)
{Super::Tick(DeltaTime);}// Called to bind functionality to input
void AMainPlayer::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{Super::SetupPlayerInputComponent(PlayerInputComponent);}

运行结果

指定骨骼模型并调整胶囊体

指定骨骼模型

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C++硬编码给出默认值
头文件胶囊体#include “Components/CapsuleComponent.h”

//设置胶囊体的默认宽高
GetCapsuleComponent()->SetCapsuleSize(35.f, 100.f);

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创建轴映射与GameMode

创建关卡GameMode子类

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设置玩家使用默认类

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轴映射

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基本简单移动与旋转控制

AddMovementInput：沿着给定的世界方向向量(通常是标准化的)添加移动输入，并按“ScaleValue”进行缩放。如果ScaleValue < 0，则移动方向相反。基础Pawn类不会自动应用移动，这取决于用户在Tick事件中这样做。像Character和DefaultPawn这样的子类会自动处理这些输入并移动。

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GetActorForwardVector：获取Actor，X轴正向的向量
GetActorRightVector：获取Actor，Y轴正向的向量

MainPlayer.cpp

// Fill out your copyright notice in the Description page of Project Settings.#include "MainPlayer.h"
#include "GameFramework/SpringArmComponent.h"
#include "Camera/CameraComponent.h"
#include "Components/CapsuleComponent.h"
#include "Components/InputComponent.h"
// Sets default values
AMainPlayer::AMainPlayer()
{// Set this character to call Tick() every frame.  You can turn this off to improve performance if you don't need it.PrimaryActorTick.bCanEverTick = true;SpringArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("SpringArm"));SpringArm->SetupAttachment(GetRootComponent());//设置SPringArm无碰撞臂长SpringArm->TargetArmLength = 600.f;SpringArm->bUsePawnControlRotation = true;//硬编码SpringArm继承controlller旋转为真FollowCamera = CreateDefaultSubobject<UCameraComponent>(TEXT("FollowCamera"));FollowCamera->SetupAttachment(SpringArm, NAME_None);FollowCamera->bUsePawnControlRotation = false;//硬编码FollowCamera继承controlller旋转为假//设置胶囊体的默认宽高GetCapsuleComponent()->SetCapsuleSize(35.f, 100.f);
}// Called when the game starts or when spawned
void AMainPlayer::BeginPlay()
{Super::BeginPlay();}// Called every frame
void AMainPlayer::Tick(float DeltaTime)
{Super::Tick(DeltaTime);}// Called to bind functionality to input
void AMainPlayer::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{Super::SetupPlayerInputComponent(PlayerInputComponent);//检查PlayerInputComponent指针，check函数只能在这使用check(PlayerInputComponent);//绑定轴映射事件PlayerInputComponent->BindAxis("MoveForward", this, &AMainPlayer::MoveForward);PlayerInputComponent->BindAxis("MoveRigth", this, &AMainPlayer::MoveRigth);//绑定Controller控制器去管理视角旋转PlayerInputComponent->BindAxis("Turn", this, &ACharacter::AddControllerYawInput);PlayerInputComponent->BindAxis("LookUp", this, &ACharacter::AddControllerPitchInput);}void AMainPlayer::MoveForward(float value)
{//沿着给定的世界方向向量(通常是标准化的)添加移动输入AddMovementInput(GetActorForwardVector(), value);
}void AMainPlayer::MoveRigth(float value)
{AddMovementInput(GetActorRightVector(), value);
}

控制角色旋转

相机的选择和角色的旋转应该是两个独立的事件
我们需要分离控制相机的鼠标控制旋转（ControlRotation）和角色旋转（Pawn Rotation）。
在UE中XYZ轴的正向分别对应前方、右方和上方，显示的箭头颜色分别为红色、绿色和蓝色（三基色的习惯顺序）。
头文件 #include “GameFramework/PlayerController.h”
Controller：这是Character类中自己声明的AController* 属性，用与获取该Actor的控制器

// Fill out your copyright notice in the Description page of Project Settings.#include "MainPlayer.h"
#include "GameFramework/SpringArmComponent.h"
#include "Camera/CameraComponent.h"
#include "Components/CapsuleComponent.h"
#include "Components/InputComponent.h"
#include "GameFramework/PlayerController.h"// Sets default values
AMainPlayer::AMainPlayer()
{// Set this character to call Tick() every frame.  You can turn this off to improve performance if you don't need it.PrimaryActorTick.bCanEverTick = true;SpringArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("SpringArm"));SpringArm->SetupAttachment(GetRootComponent());//设置SPringArm无碰撞臂长SpringArm->TargetArmLength = 600.f;SpringArm->bUsePawnControlRotation = true;//硬编码SpringArm继承controlller旋转为真FollowCamera = CreateDefaultSubobject<UCameraComponent>(TEXT("FollowCamera"));FollowCamera->SetupAttachment(SpringArm, NAME_None);FollowCamera->bUsePawnControlRotation = false;//硬编码FollowCamera继承controlller旋转为假//设置胶囊体的默认宽高GetCapsuleComponent()->SetCapsuleSize(35.f, 100.f);//对Character的Pawn进行硬编码bUseControllerRotationPitch = false;bUseControllerRotationYaw = false;bUseControllerRotationRoll = false;}// Called when the game starts or when spawned
void AMainPlayer::BeginPlay()
{Super::BeginPlay();}// Called every frame
void AMainPlayer::Tick(float DeltaTime)
{Super::Tick(DeltaTime);}// Called to bind functionality to input
void AMainPlayer::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{Super::SetupPlayerInputComponent(PlayerInputComponent);//检查PlayerInputComponent指针，check函数只能在这使用check(PlayerInputComponent);//绑定轴映射事件PlayerInputComponent->BindAxis("MoveForward", this, &AMainPlayer::MoveForward);PlayerInputComponent->BindAxis("MoveRigth", this, &AMainPlayer::MoveRigth);//绑定Controller控制器去管理视角旋转PlayerInputComponent->BindAxis("Turn", this, &ACharacter::AddControllerYawInput);PlayerInputComponent->BindAxis("LookUp", this, &ACharacter::AddControllerPitchInput);}void AMainPlayer::MoveForward(float value)
{//获取到Control旋转FRotator Rotation = Controller->GetControlRotation();//转向只关注水平Yaw方向，因此置0防止影响FRotator YowRotation = FRotator(0.0f, Rotation.Yaw, 0.0f);//获取相机(鼠标控制器的朝向)，并且朝这个轴的方向移动FVector Direction = FRotationMatrix(YowRotation).GetUnitAxis(EAxis::X);AddMovementInput(Direction, value);
}void AMainPlayer::MoveRigth(float value)
{//获取到Controller旋转FRotator Rotation = Controller->GetControlRotation();//转向只关注水平Yaw方向，因此置0防止影响FRotator YowRotation = FRotator(0.0f, Rotation.Yaw, 0.0f);//获取相机(鼠标控制器的朝向)，并且朝这个轴的方向移动FVector Direction = FRotationMatrix(YowRotation).GetUnitAxis(EAxis::Y);AddMovementInput(Direction, value);
}

使角色自动面向移动方向

CharacterMovement非常强大，我们打开CharacterMovement的Orient Rotation to Movement就开启自动面向旋转

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头文件：#include “GameFramework/CharacterMovementComponent.h”

	//硬编码orient Rotation to Movement,给个默认转向速率GetCharacterMovement()->bOrientRotationToMovement = true;GetCharacterMovement()->RotationRate = FRotator(0.f, 500.f, 0.f);

运行结果

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创建键盘与手柄使用的视角与旋转函数

新建两个float变量来控制上下左右转向的速率，注意旋转时要乘以DeltaTime避免高低性能差值

	float BaseTurnRate;		//使用键盘X转向的速率float BaseLookUpRate;	//使用键盘Y转向的速率//给键盘控制转向的速率变量赋初值BaseTurnRate = 21.f;BaseLookUpRate = 21.f;

因为可能要修改视角限制，新建Turn与LookUp绑定Controller控制器去管理视角旋转函数，新建绑定键盘鼠标轴映射事件函数

private:void MoveForward(float value);void MoveRight(float value);void Turn(float Value);void LookUp(float Value);void TurnRate(float Rate);void LookUpRate(float Rate);

// Called to bind functionality to input
void AMainPlayer::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{Super::SetupPlayerInputComponent(PlayerInputComponent);//检查PlayerInputComponent指针，check函数只能在这使用check(PlayerInputComponent);//绑定移动轴映射事件PlayerInputComponent->BindAxis("MoveForward", this, &AMainPlayer::MoveForward);PlayerInputComponent->BindAxis("MoveRight", this, &AMainPlayer::MoveRight);//绑定Controller控制器去管理视角旋转PlayerInputComponent->BindAxis("Turn", this, &AMainPlayer::Turn);PlayerInputComponent->BindAxis("LookUp", this, &AMainPlayer::LookUp);//绑定键盘鼠标轴映射事件PlayerInputComponent->BindAxis("TurnRate", this, &AMainPlayer::TurnRate);PlayerInputComponent->BindAxis("LookUpRate", this, &AMainPlayer::LookUpRate);}

void AMainPlayer::Turn(float Value)
{if (Value != 0.f){AddControllerYawInput(Value);}}void AMainPlayer::LookUp(float Value)
{if (Value != 0.f){AddControllerPitchInput(Value);}}void AMainPlayer::TurnRate(float Rate)
{//要乘以一个DeltaTime这样就可以避免高帧底帧差值问题float Value = Rate * BaseTurnRate * GetWorld()->GetDeltaSeconds();if (Value != 0.f){AddControllerYawInput(Value);}
}void AMainPlayer::LookUpRate(float Rate)
{//要乘以一个DeltaTime这样就可以避免高帧底帧差值问题float Value = Rate * BaseLookUpRate * GetWorld()->GetDeltaSeconds();if (Value != 0.f){AddControllerPitchInput(Value);}
}

限制角色上下视角旋转的范围

思路当旋转区域不是理想的范围就直接不要

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void AMainPlayer::LookUp(float Value)
{//UE_LOG(LogTemp, Warning, TEXT("%f"), GetControlRotation().Pitch);// //控制视角if (GetControlRotation().Pitch < 270.f && GetControlRotation().Pitch >180.f && Value > 0.f){return;}else if (GetControlRotation().Pitch < 180.f && GetControlRotation().Pitch >45.f && Value < 0.f){return;}AddControllerPitchInput(Value);
}

MainPlayer.cpp

// Fill out your copyright notice in the Description page of Project Settings.#include "MainPlayer.h"
#include "GameFramework/SpringArmComponent.h"
#include "Camera/CameraComponent.h"
#include "Components/CapsuleComponent.h"
#include "Components/InputComponent.h"
#include "GameFramework/PlayerController.h"
#include "GameFramework/CharacterMovementComponent.h"// Sets default values
AMainPlayer::AMainPlayer()
{// Set this character to call Tick() every frame.  You can turn this off to improve performance if you don't need it.PrimaryActorTick.bCanEverTick = true;SpringArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("SpringArm"));SpringArm->SetupAttachment(GetRootComponent());//设置SPringArm无碰撞臂长SpringArm->TargetArmLength = 600.f;SpringArm->bUsePawnControlRotation = true;//硬编码SpringArm继承controlller旋转为真FollowCamera = CreateDefaultSubobject<UCameraComponent>(TEXT("FollowCamera"));FollowCamera->SetupAttachment(SpringArm, NAME_None);FollowCamera->bUsePawnControlRotation = false;//硬编码FollowCamera继承controlller旋转为假//设置胶囊体的默认宽高GetCapsuleComponent()->SetCapsuleSize(35.f, 100.f);//对Character的Pawn进行硬编码bUseControllerRotationPitch = false;bUseControllerRotationYaw = false;bUseControllerRotationRoll = false;//硬编码orient Rotation to Movement,给个默认转向速率GetCharacterMovement()->bOrientRotationToMovement = true;GetCharacterMovement()->RotationRate = FRotator(0.f, 500.f, 0.f);//给键盘控制转向的速率变量赋初值BaseTurnRate = 21.f;BaseLookUpRate = 21.f;
}// Called when the game starts or when spawned
void AMainPlayer::BeginPlay()
{Super::BeginPlay();}// Called every frame
void AMainPlayer::Tick(float DeltaTime)
{Super::Tick(DeltaTime);}// Called to bind functionality to input
void AMainPlayer::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{Super::SetupPlayerInputComponent(PlayerInputComponent);//检查PlayerInputComponent指针，check函数只能在这使用check(PlayerInputComponent);//绑定移动轴映射事件PlayerInputComponent->BindAxis("MoveForward", this, &AMainPlayer::MoveForward);PlayerInputComponent->BindAxis("MoveRight", this, &AMainPlayer::MoveRight);//绑定Controller控制器去管理视角旋转PlayerInputComponent->BindAxis("Turn", this, &AMainPlayer::Turn);PlayerInputComponent->BindAxis("LookUp", this, &AMainPlayer::LookUp);//绑定键盘鼠标轴映射事件PlayerInputComponent->BindAxis("TurnRate", this, &AMainPlayer::TurnRate);PlayerInputComponent->BindAxis("LookUpRate", this, &AMainPlayer::LookUpRate);}void AMainPlayer::MoveForward(float value)
{if (Controller != nullptr && value != 0.f){//获取到Control旋转FRotator Rotation = Controller->GetControlRotation();//转向只关注水平Yaw方向，因此置0防止影响FRotator YowRotation = FRotator(0.0f, Rotation.Yaw, 0.0f);//获取相机(鼠标控制器的朝向)，并且朝这个轴的方向移动FVector Direction = FRotationMatrix(YowRotation).GetUnitAxis(EAxis::X);AddMovementInput(Direction, value);}}void AMainPlayer::MoveRight(float value)
{if (Controller != nullptr && value != 0.f){//获取到Controller旋转FRotator Rotation = Controller->GetControlRotation();//转向只关注水平Yaw方向，因此置0防止影响FRotator YowRotation = FRotator(0.0f, Rotation.Yaw, 0.0f);//获取相机(鼠标控制器的朝向)，并且朝这个轴的方向移动FVector Direction = FRotationMatrix(YowRotation).GetUnitAxis(EAxis::Y);AddMovementInput(Direction, value);}
}void AMainPlayer::Turn(float Value)
{if (Value != 0.f){AddControllerYawInput(Value);}}void AMainPlayer::LookUp(float Value)
{//UE_LOG(LogTemp, Warning, TEXT("%f"), GetControlRotation().Pitch);// //控制视角if (GetControlRotation().Pitch < 270.f && GetControlRotation().Pitch >180.f && Value > 0.f){return;}else if (GetControlRotation().Pitch < 180.f && GetControlRotation().Pitch >45.f && Value < 0.f){return;}AddControllerPitchInput(Value);
}void AMainPlayer::TurnRate(float Rate)
{//要乘以一个DeltaTime这样就可以避免高帧底帧差值问题float Value = Rate * BaseTurnRate * GetWorld()->GetDeltaSeconds();if (Value != 0.f){AddControllerYawInput(Value);}
}void AMainPlayer::LookUpRate(float Rate)
{//要乘以一个DeltaTime这样就可以避免高帧底帧差值问题float Value = Rate * BaseLookUpRate * GetWorld()->GetDeltaSeconds();//控制视角if (GetControlRotation().Pitch < 270.f && GetControlRotation().Pitch >180.f && Value > 0.f){return;}else if (GetControlRotation().Pitch < 180.f && GetControlRotation().Pitch >45.f && Value < 0.f){return;}AddControllerPitchInput(Value);}

角色跳跃与空中控制

直接重写Character类中的Jump方法，然后绑定轴映射到空格跳跃

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	//重新Character类中的Jump方法void Jump() override;

	//绑定跳跃轴映射事件PlayerInputComponent->BindAction("Jump", IE_Pressed, this, &AMainPlayer::Jump);//按下空格PlayerInputComponent->BindAction("Jump", IE_Released, this, &ACharacter::StopJumping);//抬起空格

void AMainPlayer::Jump()
{//继承父类的方法Super::Jump();
}

设置跳跃的默认跳跃初始值与在空中的坠落时横向运动控制量(硬编码)

	//设置跳跃初始值与在空中的坠落时横向运动控制量GetCharacterMovement()->JumpZVelocity = 600.f;GetCharacterMovement()->AirControl = 0.15f;

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MainPlayer.h

// Fill out your copyright notice in the Description page of Project Settings.#pragma once#include "CoreMinimal.h"
#include "GameFramework/Character.h"
#include "MainPlayer.generated.h"UCLASS()
class UEGAME_API AMainPlayer : public ACharacter
{GENERATED_BODY()public:// Sets default values for this character's propertiesAMainPlayer();//新建一个SpringArmUPROPERTY(visibleAnywhere,BlueprintReadOnly)class USpringArmComponent* SpringArm;//新建一个CameraUPROPERTY(visibleAnywhere, BlueprintReadOnly)class UCameraComponent* FollowCamera;float BaseTurnRate;		//使用键盘X转向的速率float BaseLookUpRate;	//使用键盘Y转向的速率protected:// Called when the game starts or when spawnedvirtual void BeginPlay() override;public:	// Called every framevirtual void Tick(float DeltaTime) override;// Called to bind functionality to inputvirtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;//重新Character类中的Jump方法void Jump() override;void MoveForward(float value);void MoveRight(float value);void Turn(float Value);void LookUp(float Value);void TurnRate(float Rate);void LookUpRate(float Rate);
};

MainPlayer.cpp

// Fill out your copyright notice in the Description page of Project Settings.#include "MainPlayer.h"
#include "GameFramework/SpringArmComponent.h"
#include "Camera/CameraComponent.h"
#include "Components/CapsuleComponent.h"
#include "Components/InputComponent.h"
#include "GameFramework/PlayerController.h"
#include "GameFramework/CharacterMovementComponent.h"// Sets default values
AMainPlayer::AMainPlayer()
{// Set this character to call Tick() every frame.  You can turn this off to improve performance if you don't need it.PrimaryActorTick.bCanEverTick = true;SpringArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("SpringArm"));SpringArm->SetupAttachment(GetRootComponent());//设置SPringArm无碰撞臂长SpringArm->TargetArmLength = 600.f;SpringArm->bUsePawnControlRotation = true;//硬编码SpringArm继承controlller旋转为真FollowCamera = CreateDefaultSubobject<UCameraComponent>(TEXT("FollowCamera"));FollowCamera->SetupAttachment(SpringArm, NAME_None);FollowCamera->bUsePawnControlRotation = false;//硬编码FollowCamera继承controlller旋转为假//设置胶囊体的默认宽高GetCapsuleComponent()->SetCapsuleSize(35.f, 100.f);//对Character的Pawn进行硬编码bUseControllerRotationPitch = false;bUseControllerRotationYaw = false;bUseControllerRotationRoll = false;//硬编码orient Rotation to Movement,给个默认转向速率GetCharacterMovement()->bOrientRotationToMovement = true;GetCharacterMovement()->RotationRate = FRotator(0.f, 500.f, 0.f);//设置跳跃初始值与在空中的坠落时横向运动控制量GetCharacterMovement()->JumpZVelocity = 600.f;GetCharacterMovement()->AirControl = 0.15f;//给键盘控制转向的速率变量赋初值BaseTurnRate = 21.f;BaseLookUpRate = 21.f;
}// Called when the game starts or when spawned
void AMainPlayer::BeginPlay()
{Super::BeginPlay();}// Called every frame
void AMainPlayer::Tick(float DeltaTime)
{Super::Tick(DeltaTime);}// Called to bind functionality to input
void AMainPlayer::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{Super::SetupPlayerInputComponent(PlayerInputComponent);//检查PlayerInputComponent指针，check函数只能在这使用check(PlayerInputComponent);//绑定跳跃轴映射事件PlayerInputComponent->BindAction("Jump", IE_Pressed, this, &AMainPlayer::Jump);//按下空格PlayerInputComponent->BindAction("Jump", IE_Released, this, &ACharacter::StopJumping);//抬起空格//绑定移动轴映射事件PlayerInputComponent->BindAxis("MoveForward", this, &AMainPlayer::MoveForward);PlayerInputComponent->BindAxis("MoveRight", this, &AMainPlayer::MoveRight);//绑定Controller控制器去管理视角旋转PlayerInputComponent->BindAxis("Turn", this, &AMainPlayer::Turn);PlayerInputComponent->BindAxis("LookUp", this, &AMainPlayer::LookUp);//绑定键盘鼠标轴映射事件PlayerInputComponent->BindAxis("TurnRate", this, &AMainPlayer::TurnRate);PlayerInputComponent->BindAxis("LookUpRate", this, &AMainPlayer::LookUpRate);}void AMainPlayer::Jump()
{//继承父类的方法Super::Jump();
}void AMainPlayer::MoveForward(float value)
{if (Controller != nullptr && value != 0.f){//获取到Control旋转FRotator Rotation = Controller->GetControlRotation();//转向只关注水平Yaw方向，因此置0防止影响FRotator YowRotation = FRotator(0.0f, Rotation.Yaw, 0.0f);//获取相机(鼠标控制器的朝向)，并且朝这个轴的方向移动FVector Direction = FRotationMatrix(YowRotation).GetUnitAxis(EAxis::X);AddMovementInput(Direction, value);}}void AMainPlayer::MoveRight(float value)
{if (Controller != nullptr && value != 0.f){//获取到Controller旋转FRotator Rotation = Controller->GetControlRotation();//转向只关注水平Yaw方向，因此置0防止影响FRotator YowRotation = FRotator(0.0f, Rotation.Yaw, 0.0f);//获取相机(鼠标控制器的朝向)，并且朝这个轴的方向移动FVector Direction = FRotationMatrix(YowRotation).GetUnitAxis(EAxis::Y);AddMovementInput(Direction, value);}
}void AMainPlayer::Turn(float Value)
{if (Value != 0.f){AddControllerYawInput(Value);}}void AMainPlayer::LookUp(float Value)
{//UE_LOG(LogTemp, Warning, TEXT("%f"), GetControlRotation().Pitch);// //控制视角if (GetControlRotation().Pitch < 270.f && GetControlRotation().Pitch >180.f && Value > 0.f){return;}else if (GetControlRotation().Pitch < 180.f && GetControlRotation().Pitch >45.f && Value < 0.f){return;}AddControllerPitchInput(Value);
}void AMainPlayer::TurnRate(float Rate)
{//要乘以一个DeltaTime这样就可以避免高帧底帧差值问题float Value = Rate * BaseTurnRate * GetWorld()->GetDeltaSeconds();if (Value != 0.f){AddControllerYawInput(Value);}
}void AMainPlayer::LookUpRate(float Rate)
{//要乘以一个DeltaTime这样就可以避免高帧底帧差值问题float Value = Rate * BaseLookUpRate * GetWorld()->GetDeltaSeconds();//控制视角if (GetControlRotation().Pitch < 270.f && GetControlRotation().Pitch >180.f && Value > 0.f){return;}else if (GetControlRotation().Pitch < 180.f && GetControlRotation().Pitch >45.f && Value < 0.f){return;}AddControllerPitchInput(Value);}

混合空间(BlendSpace)

创建BlendSpace1D，并给出相应的骨骼

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将相应的行走、奔跑、动画添加上去

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动画蓝图的创建

创建动画蓝图，选择自己的骨骼

创建给动画蓝图提供逻辑的AnimInstance子类

创建AnimInstance子类
写入判断是否奔跑与跳跃的变量，MainPlayer类的指针方便到时候好获取参数参与UE反射，重写NativeInitializeAnimation，这个函数类似与BeginPlay，然后加入一个实时更新的函数在Animation蓝图中使用
MainPlayerAnimation.h

// Fill out your copyright notice in the Description page of Project Settings.#pragma once#include "CoreMinimal.h"
#include "Animation/AnimInstance.h"
#include "MainPlayerAnimInstance.generated.h"/*** */
UCLASS()
class UEGAME_API UMainPlayerAnimInstance : public UAnimInstance
{GENERATED_BODY()public:UPROPERTY(VisibleAnywhere,BlueprintReadOnly,Category="Animation Properties")float Speed;//判断速度是否达到奔跑UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Animation Properties")bool bIsAir;//判断是否跳跃UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Animation Properties")class AMainPlayer* Player;virtual void NativeInitializeAnimation() override; //类似与BeginPlayUFUNCTION(BlueprintCallable, Category = "Animation Properties")void UpdataAnimationProperties();//实时更新
};

MainPlayerAnimtion.cpp

// Fill out your copyright notice in the Description page of Project Settings.#include "MainPlayerAnimInstance.h"void UMainPlayerAnimInstance::NativeInitializeAnimation()
{}void UMainPlayerAnimInstance::UpdataAnimationProperties()
{}

编写动画参数更新逻辑并给动画蓝图指定父类

MainPlayerAnimtion.cpp
TryGetPawnOwner：获取角色的Pawn类
GetVelocity：获取速度

// Fill out your copyright notice in the Description page of Project Settings.#include "MainPlayerAnimInstance.h"
#include "Characters/Player/MainPlayer.h"
#include "GameFramework/CharacterMovementComponent.h"
void UMainPlayerAnimInstance::NativeInitializeAnimation()
{Player = Cast<AMainPlayer>(TryGetPawnOwner());//获取角色的Pawn类
}void UMainPlayerAnimInstance::UpdataAnimationProperties()
{//防御性编程if (Player){//移动只需要平面的速度FVector SpeedVector = Player->GetVelocity();FVector PlanarSpeed = FVector(SpeedVector.X, SpeedVector.Y, 0.f);//将移动的向量传给speed即可Speed = PlanarSpeed.Size();bIsAir = Player->GetMovementComponent()->IsFalling();//判断Player是否在下落}else {Player = Cast<AMainPlayer>(TryGetPawnOwner());//获取角色的Pawn类}}