98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
// Fill out your copyright notice in the Description page of Project Settings.
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#include "CameraPawn.h"
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#include "GameFramework/SpringArmComponent.h"
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#include "Camera/CameraComponent.h"
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#include "InputActionValue.h"
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void ACameraPawn::CameraZoom(const FInputActionValue& Value)
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{
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auto f = Value.Get<float>();
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SpringArmComponent->TargetArmLength += f * ZoomSpeed;
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SpringArmComponent->TargetArmLength = FMath::Clamp(SpringArmComponent->TargetArmLength, MinArmLength, MaxArmLength);
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}
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void ACameraPawn::CameraRotate(const FInputActionValue& Value)
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{
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auto f = Value.Get<float>();
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FRotator r = FRotator(0.0f, f * RotateSpeed, 0.0f);
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AddActorWorldRotation(r);
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}
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void ACameraPawn::CameraMove(const FInputActionValue& Value)
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{
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auto f2d = Value.Get<FVector2D>();
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auto r = GetActorRightVector();
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auto f = r.Cross(FVector::UpVector);
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f.Normalize();
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auto l = GetRootComponent()->GetRelativeLocation() + f * f2d.X * MoveSpeed + r * f2d.Y * MoveSpeed;
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l.X = FMath::Clamp(l.X, -CameraMoveClamp, CameraMoveClamp);
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l.Y = FMath::Clamp(l.Y, -CameraMoveClamp, CameraMoveClamp);
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SetActorRelativeLocation(l);
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}
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void ACameraPawn::CameraReset(const FInputActionValue& Value)
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{
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SpringArmComponent->TargetArmLength = InitialArmLength;
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SetActorRotation(InitialRotation);
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SetActorRelativeLocation(FVector::ZeroVector);
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}
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// Sets default values
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ACameraPawn::ACameraPawn()
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{
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// Set this pawn to call Tick() every frame. You can turn this off to improve performance if you don't need it.
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PrimaryActorTick.bCanEverTick = true;
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// 初始化 SpringArmComponent 和 CameraComponent
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SpringArmComponent = CreateDefaultSubobject<USpringArmComponent>(TEXT("SpringArmComponent"));
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SpringArmComponent->SetupAttachment(RootComponent);
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SpringArmComponent->TargetArmLength = InitialArmLength;
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SpringArmComponent->bUsePawnControlRotation = true;// TODO: 何意味？
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CameraComponent = CreateDefaultSubobject<UCameraComponent>(TEXT("CameraComponent"));
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CameraComponent->SetupAttachment(SpringArmComponent, USpringArmComponent::SocketName);
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// 设置弹簧臂碰撞属性
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SpringArmComponent->bDoCollisionTest = false;
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}
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// Called when the game starts or when spawned
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void ACameraPawn::BeginPlay()
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{
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Super::BeginPlay();
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if (FollowTarget)
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{
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// 切换到当前摄像头
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auto c = Cast<APlayerController>(FollowTarget->GetController());
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if (c)
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{
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c->SetViewTarget(this);
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}
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// 附加到父物体
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this->AttachToActor(FollowTarget, FAttachmentTransformRules::KeepWorldTransform);
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}
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// 设置自身旋转
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SetActorRotation(InitialRotation);
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}
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// Called every frame
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void ACameraPawn::Tick(float DeltaTime)
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{
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Super::Tick(DeltaTime);
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}
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// Called to bind functionality to input
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void ACameraPawn::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
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{
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Super::SetupPlayerInputComponent(PlayerInputComponent);
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}
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