今天解决两大问题，第一个，键盘按键与鼠标轴向在UE中的绑定。第二个，解决UE中Charactor随着相机朝向的问题。

新建一个类继承与Charactor类.

在工程设置中找到Input.

并如下设置：

在头文件中写入以下代码：

1 // Fill out your copyright notice in the Description page of Project Settings.2 3 #pragma once4 5 #include "CoreMinimal.h"6 #include "GameFramework/Character.h"7 #include "MyCharacter.generated.h"8 9 UCLASS()
10 class CHARACTOR_API AMyCharacter : public ACharacter
11 {
12     GENERATED_BODY()
13 
14 public:
15     // Sets default values for this character's properties
16     AMyCharacter();
17 
18 protected:
19     // Called when the game starts or when spawned
20     virtual void BeginPlay() override;
21 
22 public:    
23     // Called every frame
24     virtual void Tick(float DeltaTime) override;
25 
26     // Called to bind functionality to input
27     virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;
28 
29 private:
30     FVector keyInput;
31     FRotator mouseInput;
32     float maxSpeed;
33     float mouseSpeed;
34     void forward(float value);
35     void right(float value);
36     void up(float value);
37     void yaw(float value);
38     void pitch(float value);
39 
40 public:
41     UPROPERTY(VisibleAnywhere,BlueprintReadOnly)
42     class UStaticMeshComponent* myStaticMesh;
43 
44     FORCEINLINE UStaticMeshComponent* GetmyStaticMesh() {
45         return myStaticMesh;
46     }
47 
48 
49     UPROPERTY(VisibleAnywhere, BlueprintReadOnly)
50     class USpringArmComponent* mySpringArm;
51     UPROPERTY(VisibleAnywhere, BlueprintReadOnly)
52     class UCameraComponent* myCamera;
53 };

在源文件中写入以下代码：

1 // Fill out your copyright notice in the Description page of Project Settings.2 3 4 #include "MyCharacter.h"5 #include "Components\InputComponent.h"6 #include "Components\StaticMeshComponent.h"7 #include "GameFramework\SpringArmComponent.h"8 #include "Camera\CameraComponent.h"9 #include "UObject\ConstructorHelpers.h"10 11 12 // Sets default values13 AMyCharacter::AMyCharacter()14 {15      // Set this character to call Tick() every frame.  You can turn this off to improve performance if you don't need it.16     PrimaryActorTick.bCanEverTick = true;17     mouseInput = FRotator(0.0f);18     keyInput = FVector::ZeroVector;19     maxSpeed = 300.0f;20     AutoPossessPlayer = EAutoReceiveInput::Player0;21     mouseSpeed = 2.0f;22 23     myStaticMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("myStaticMesh"));24     mySpringArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("mySpringArm"));25     myCamera = CreateDefaultSubobject<UCameraComponent>(TEXT("myCamera"));26 27     auto myMeshAsset = ConstructorHelpers::FObjectFinder<UStaticMesh>(TEXT("StaticMesh'/Engine/VREditor/TransformGizmo/SM_Sequencer_Key.SM_Sequencer_Key'"));28     auto myMatAsset = ConstructorHelpers::FObjectFinder<UMaterialInterface>(TEXT("Material'/Engine/Functions/Engine_MaterialFunctions02/ExampleContent/GradientMap_Multi_Example.GradientMap_Multi_Example'"));29     30     if (myMeshAsset.Succeeded() && myMatAsset.Succeeded()) {31         myStaticMesh->SetStaticMesh(myMeshAsset.Object);32         myStaticMesh->SetMaterial(0, myMatAsset.Object);33         myStaticMesh->SetMaterial(1, myMatAsset.Object); 34     }35     36     myStaticMesh->SetupAttachment(GetRootComponent());37     mySpringArm->SetupAttachment(GetmyStaticMesh());38     myCamera->SetupAttachment(mySpringArm);39 40     mySpringArm->bEnableCameraLag = true;41     mySpringArm->CameraLagSpeed = 30.0f;42     mySpringArm->TargetArmLength = 300.0f;43 44 45     myCamera->SetRelativeLocation(FVector(0.0f, 0.0f, 100.0f));46     myCamera->SetRelativeRotation(FRotator(-5.0f,0.0f,0.0f));47 48     //bUseControllerRotationYaw = true;49 50 }51 52 // Called when the game starts or when spawned53 void AMyCharacter::BeginPlay()54 {55     Super::BeginPlay();56     57 }58 59 // Called every frame60 void AMyCharacter::Tick(float DeltaTime)61 {62     Super::Tick(DeltaTime);63     64 65     auto direction_forward = myCamera->GetForwardVector();66     auto direction_right = myCamera->GetRightVector();67      68 69     if (keyInput.X == 1.0) {70         keyInput = direction_forward;71         keyInput *= maxSpeed;72     }else if (keyInput.X == -1.0) {73         keyInput = -direction_forward;74         keyInput *= maxSpeed;    75     }76 77     if (keyInput.Y == 1.0) {78         keyInput = direction_right;79         keyInput *= maxSpeed;80     }81     else if (keyInput.Y == -1.0) {82         keyInput = -direction_right;83         keyInput *= maxSpeed;84     }85 86     FHitResult hit;87     AddActorLocalOffset(DeltaTime * keyInput, true, &hit);88     89     FRotator Rotations = myStaticMesh->GetRelativeRotation();90     Rotations.Yaw += mouseInput.Yaw * mouseSpeed;91     Rotations.Pitch = 0;92     Rotations.Roll = 0;93     myStaticMesh->SetRelativeRotation(Rotations);94 95 96     //AddControllerYawInput(Rotations.Yaw);97         98 99     FRotator CRotator = mySpringArm->GetComponentRotation();
100     CRotator.Yaw = 0.0f;
101     CRotator.Pitch = FMath::Clamp(CRotator.Pitch + mouseInput.Pitch, -30.0f, 90.0f);
102     CRotator.Roll = 0.0f;
103     mySpringArm->SetRelativeRotation(CRotator);
104 
105 }
106 
107 // Called to bind functionality to input
108 void AMyCharacter::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
109 {
110     Super::SetupPlayerInputComponent(PlayerInputComponent);
111     PlayerInputComponent->BindAxis("forward",this, &AMyCharacter::forward);
112     PlayerInputComponent->BindAxis("right",this, &AMyCharacter::right);
113     PlayerInputComponent->BindAxis("up",this, &AMyCharacter::up);
114     PlayerInputComponent->BindAxis("yaw",this, &AMyCharacter::yaw);
115     PlayerInputComponent->BindAxis("pitch",this, &AMyCharacter::pitch);
116 
117 }
118 
119 void AMyCharacter::forward(float value)
120 {
121     
122     keyInput.X = FMath::Clamp(value, -1.0f, 1.0f);
123 }
124 
125 void AMyCharacter::right(float value)
126 {
127 
128     keyInput.Y = FMath::Clamp(value, -1.0f, 1.0f);
129 }
130 
131 void AMyCharacter::up(float value)
132 {
133     keyInput.Z = FMath::Clamp(value, -1.0f, 1.0f) * maxSpeed;
134 }
135 
136 void AMyCharacter::yaw(float value)
137 {
138     mouseInput.Yaw = FMath::Clamp(value, -1.0f, 1.0f) * mouseSpeed;
139 }
140
141 void AMyCharacter::pitch(float value) 
142 { 
143     mouseInput.Pitch = FMath::Clamp(value, -1.0f, 1.0f) * mouseSpeed; 
144 }

这里需要注意将所有的物理属性关闭，重力属性关闭。

世界重力也要关闭。

效果如下，物体朝向与摄像机一致，按键方向也与朝向一致。