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관리 메뉴

codingfarm

flight 본문

Unreal 4/기타

flight

scarecrow1992 2020. 8. 8. 22:33

언리얼 기본 예제 프로젝트인 flight에 대해 알아보자

a,d 로 좌/우회전

w,s 로 하강/상승

L.shift, L.ctrl로 가속/감속을 하여 비행기를 조종한다.

 

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// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.
//FlightPawh.h
 
#pragma once
 
#include "CoreMinimal.h"
#include "GameFramework/Pawn.h"
#include "FlightPawn.generated.h"
 
UCLASS(Config=Game)
class AFlightPawn : public APawn
{
    GENERATED_BODY()
 
    /** StaticMesh component that will be the visuals for our flying pawn */
    UPROPERTY(Category = Mesh, VisibleDefaultsOnly, BlueprintReadOnly, meta = (AllowPrivateAccess = "true"))
    class UStaticMeshComponent* PlaneMesh;
 
    /** Spring arm that will offset the camera */
    UPROPERTY(Category = Camera, VisibleDefaultsOnly, BlueprintReadOnly, meta = (AllowPrivateAccess = "true"))
    class USpringArmComponent* SpringArm;
 
    /** Camera component that will be our viewpoint */
    UPROPERTY(Category = Camera, VisibleDefaultsOnly, BlueprintReadOnly, meta = (AllowPrivateAccess = "true"))
    class UCameraComponent* Camera;
public:
    AFlightPawn();
 
    // Begin AActor overrides
    virtual void Tick(float DeltaSeconds) override;
    virtual void NotifyHit(class UPrimitiveComponent* MyComp, class AActor* Other, class UPrimitiveComponent* OtherComp, bool bSelfMoved, FVector HitLocation, FVector HitNormal, FVector NormalImpulse, const FHitResult& Hit) override;
    // End AActor overrides
 
protected:
 
    // Begin APawn overrides
    virtual void SetupPlayerInputComponent(class UInputComponent* InputComponent) override; // Allows binding actions/axes to functions
    // End APawn overrides
 
    /** Bound to the thrust axis */
    void ThrustInput(float Val);
    
    /** Bound to the vertical axis */
    void MoveUpInput(float Val);
 
    /** Bound to the horizontal axis */
    void MoveRightInput(float Val);
 
private:
 
    /** How quickly forward speed changes */
    UPROPERTY(Category=Plane, EditAnywhere)
    float Acceleration;
 
    /** How quickly pawn can steer */
    UPROPERTY(Category=Plane, EditAnywhere)
    float TurnSpeed;
 
    /** Max forward speed */
    UPROPERTY(Category = Pitch, EditAnywhere)
    float MaxSpeed;
 
    /** Min forward speed */
    UPROPERTY(Category=Yaw, EditAnywhere)
    float MinSpeed;
 
    /** Current forward speed */
    float CurrentForwardSpeed;
 
    /** Current yaw speed */
    float CurrentYawSpeed;
 
    /** Current pitch speed */
    float CurrentPitchSpeed;
 
    /** Current roll speed */
    float CurrentRollSpeed;
 
public:
    /** Returns PlaneMesh subobject **/
    FORCEINLINE class UStaticMeshComponent* GetPlaneMesh() const { return PlaneMesh; }
    /** Returns SpringArm subobject **/
    FORCEINLINE class USpringArmComponent* GetSpringArm() const { return SpringArm; }
    /** Returns Camera subobject **/
    FORCEINLINE class UCameraComponent* GetCamera() const { return Camera; }
};
 
 cs

 

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// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.
//FlightPawn.cpp
 
#include "FlightPawn.h"
#include "UObject/ConstructorHelpers.h"
#include "Camera/CameraComponent.h"
#include "Components/StaticMeshComponent.h"
#include "Components/InputComponent.h"
#include "GameFramework/SpringArmComponent.h"
#include "Engine/World.h"
#include "Engine/StaticMesh.h"
 
AFlightPawn::AFlightPawn()
{
    // Structure to hold one-time initialization
    struct FConstructorStatics
    {
        ConstructorHelpers::FObjectFinderOptional<UStaticMesh> PlaneMesh;
        FConstructorStatics()
            : PlaneMesh(TEXT("/Game/Flying/Meshes/UFO.UFO"))
        {
        }
    };
    static FConstructorStatics ConstructorStatics;
 
    // Create static mesh component
    PlaneMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("PlaneMesh0"));
    PlaneMesh->SetStaticMesh(ConstructorStatics.PlaneMesh.Get());    // Set static mesh
    RootComponent = PlaneMesh;
 
    // Create a spring arm component
    SpringArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("SpringArm0"));
    SpringArm->SetupAttachment(RootComponent);    // Attach SpringArm to RootComponent
    SpringArm->TargetArmLength = 160.0f; // The camera follows at this distance behind the character    
    SpringArm->SocketOffset = FVector(0.f,0.f,60.f);
    SpringArm->bEnableCameraLag = false;    // Do not allow camera to lag
    SpringArm->CameraLagSpeed = 15.f;
 
    // Create camera component 
    Camera = CreateDefaultSubobject<UCameraComponent>(TEXT("Camera0"));
    Camera->SetupAttachment(SpringArm, USpringArmComponent::SocketName);    // Attach the camera
    Camera->bUsePawnControlRotation = false; // Don't rotate camera with controller
 
    // Set handling parameters
    Acceleration = 500.f;
    TurnSpeed = 50.f;
    MaxSpeed = 4000.f;
    MinSpeed = 500.f;
    CurrentForwardSpeed = 500.f;
}
 
void AFlightPawn::Tick(float DeltaSeconds)
{
    const FVector LocalMove = FVector(CurrentForwardSpeed * DeltaSeconds, 0.f, 0.f);
 
    // Move plan forwards (with sweep so we stop when we collide with things)
    AddActorLocalOffset(LocalMove, true);
 
    // Calculate change in rotation this frame
    FRotator DeltaRotation(0,0,0);
    DeltaRotation.Pitch = CurrentPitchSpeed * DeltaSeconds;
    DeltaRotation.Yaw = CurrentYawSpeed * DeltaSeconds;
    DeltaRotation.Roll = CurrentRollSpeed * DeltaSeconds;
 
    // Rotate plane
    AddActorLocalRotation(DeltaRotation);
 
    // Call any parent class Tick implementation
    Super::Tick(DeltaSeconds);
}
 
void AFlightPawn::NotifyHit(class UPrimitiveComponent* MyComp, class AActor* Other, class UPrimitiveComponent* OtherComp, bool bSelfMoved, FVector HitLocation, FVector HitNormal, FVector NormalImpulse, const FHitResult& Hit)
{
    Super::NotifyHit(MyComp, Other, OtherComp, bSelfMoved, HitLocation, HitNormal, NormalImpulse, Hit);
 
    // Deflect along the surface when we collide.
    FRotator CurrentRotation = GetActorRotation();
    SetActorRotation(FQuat::Slerp(CurrentRotation.Quaternion(), HitNormal.ToOrientationQuat(), 0.025f));
}
 
 
void AFlightPawn::SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent)
{
    // Check if PlayerInputComponent is valid (not NULL)
    check(PlayerInputComponent);
 
    // Bind our control axis' to callback functions
    PlayerInputComponent->BindAxis("Thrust", this, &AFlightPawn::ThrustInput);
    PlayerInputComponent->BindAxis("MoveUp", this, &AFlightPawn::MoveUpInput);
    PlayerInputComponent->BindAxis("MoveRight", this, &AFlightPawn::MoveRightInput);
}
 
void AFlightPawn::ThrustInput(float Val)
{
    // Is there any input?
    bool bHasInput = !FMath::IsNearlyEqual(Val, 0.f);
    // If input is not held down, reduce speed
    float CurrentAcc = bHasInput ? (Val * Acceleration) : (-0.5f * Acceleration);
    // Calculate new speed
    float NewForwardSpeed = CurrentForwardSpeed + (GetWorld()->GetDeltaSeconds() * CurrentAcc);
    // Clamp between MinSpeed and MaxSpeed
    CurrentForwardSpeed = FMath::Clamp(NewForwardSpeed, MinSpeed, MaxSpeed);
}
 
void AFlightPawn::MoveUpInput(float Val)
{
    // Target pitch speed is based in input
    float TargetPitchSpeed = (Val * TurnSpeed * -1.f);
 
    // When steering, we decrease pitch slightly
    TargetPitchSpeed += (FMath::Abs(CurrentYawSpeed) * -0.2f);
 
    // Smoothly interpolate to target pitch speed
    CurrentPitchSpeed = FMath::FInterpTo(CurrentPitchSpeed, TargetPitchSpeed, GetWorld()->GetDeltaSeconds(), 2.f);
}
 
void AFlightPawn::MoveRightInput(float Val)
{
    // Target yaw speed is based on input
    float TargetYawSpeed = (Val * TurnSpeed);
 
    // Smoothly interpolate to target yaw speed
    CurrentYawSpeed = FMath::FInterpTo(CurrentYawSpeed, TargetYawSpeed, GetWorld()->GetDeltaSeconds(), 2.f);
 
    // Is there any left/right input?
    const bool bIsTurning = FMath::Abs(Val) > 0.2f;
 
    // If turning, yaw value is used to influence roll
    // If not turning, roll to reverse current roll value.
    float TargetRollSpeed = bIsTurning ? (CurrentYawSpeed * 0.5f) : (GetActorRotation().Roll * -2.f);
 
    // Smoothly interpolate roll speed
    CurrentRollSpeed = FMath::FInterpTo(CurrentRollSpeed, TargetRollSpeed, GetWorld()->GetDeltaSeconds(), 2.f);
}
 
 cs

cpp로 작성된 코드를 블루프린트로 상속받아 여러 오브젝트들을 만들던 기존의 널리쓰이던 방식과는 달리 이 프로젝트에서는 cpp파일 자체를 오브젝트로 사용한다

먼저 생성자를 살펴본다

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AFlightPawn::AFlightPawn()
{
    // Structure to hold one-time initialization
    struct FConstructorStatics
    {
        ConstructorHelpers::FObjectFinderOptional<UStaticMesh> PlaneMesh;
        FConstructorStatics()
            : PlaneMesh(TEXT("/Game/Flying/Meshes/UFO.UFO"))
        {
        }
    };
    static FConstructorStatics ConstructorStatics;
 
    // Create static mesh component
    PlaneMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("PlaneMesh0"));
    PlaneMesh->SetStaticMesh(ConstructorStatics.PlaneMesh.Get());    // Set static mesh
    RootComponent = PlaneMesh;
 
    // Create a spring arm component
    SpringArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("SpringArm0"));
    SpringArm->SetupAttachment(RootComponent);    // Attach SpringArm to RootComponent
    SpringArm->TargetArmLength = 160.0f; // The camera follows at this distance behind the character    
    SpringArm->SocketOffset = FVector(0.f,0.f,60.f);
    SpringArm->bEnableCameraLag = false;    // Do not allow camera to lag
    SpringArm->CameraLagSpeed = 15.f;
 
    // Create camera component 
    Camera = CreateDefaultSubobject<UCameraComponent>(TEXT("Camera0"));
    Camera->SetupAttachment(SpringArm, USpringArmComponent::SocketName);    // Attach the camera
    Camera->bUsePawnControlRotation = false; // Don't rotate camera with controller
 
    // Set handling parameters
    Acceleration = 500.f;
    TurnSpeed = 50.f;
    MaxSpeed = 4000.f;
    MinSpeed = 500.f;
    CurrentForwardSpeed = 500.f;
}
 cs

4~17. 언리얼 에디터가 아닌 코드상에서 에셋을 등록하기 위해 다소 번거로운 작업이 진행된다. 자세한 정보는 아래 문서를 확인한다.

https://docs.unrealengine.com/ko/Programming/Tutorials/Components/1/index.html

 

 

 

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void AFlightPawn::Tick(float DeltaSeconds)
{
    const FVector LocalMove = FVector(CurrentForwardSpeed * DeltaSeconds, 0.f, 0.f);
 
    // Move plan forwards (with sweep so we stop when we collide with things)
    AddActorLocalOffset(LocalMove, true);
 
    // Calculate change in rotation this frame
    FRotator DeltaRotation(0,0,0);
    DeltaRotation.Pitch = CurrentPitchSpeed * DeltaSeconds;
    DeltaRotation.Yaw = CurrentYawSpeed * DeltaSeconds;
    DeltaRotation.Roll = CurrentRollSpeed * DeltaSeconds;
 
    // Rotate plane
    AddActorLocalRotation(DeltaRotation);
 
    // Call any parent class Tick implementation
    Super::Tick(DeltaSeconds);
}
 
void AFlightPawn::ThrustInput(float Val)
{
    // Is there any input?
    bool bHasInput = !FMath::IsNearlyEqual(Val, 0.f);
    // If input is not held down, reduce speed
    float CurrentAcc = bHasInput ? (Val * Acceleration) : (-0.5f * Acceleration);
    // Calculate new speed
    float NewForwardSpeed = CurrentForwardSpeed + (GetWorld()->GetDeltaSeconds() * CurrentAcc);
    // Clamp between MinSpeed and MaxSpeed
    CurrentForwardSpeed = FMath::Clamp(NewForwardSpeed, MinSpeed, MaxSpeed);
}
 
void AFlightPawn::MoveUpInput(float Val)
{
    // Target pitch speed is based in input
    float TargetPitchSpeed = (Val * TurnSpeed * -1.f);
 
    // When steering, we decrease pitch slightly
    TargetPitchSpeed += (FMath::Abs(CurrentYawSpeed) * -0.2f);
 
    // Smoothly interpolate to target pitch speed
    CurrentPitchSpeed = FMath::FInterpTo(CurrentPitchSpeed, TargetPitchSpeed, GetWorld()->GetDeltaSeconds(), 2.f);
}
 
void AFlightPawn::MoveRightInput(float Val)
{
    // Target yaw speed is based on input
    float TargetYawSpeed = (Val * TurnSpeed);
 
    // Smoothly interpolate to target yaw speed
    CurrentYawSpeed = FMath::FInterpTo(CurrentYawSpeed, TargetYawSpeed, GetWorld()->GetDeltaSeconds(), 2.f);
 
    // Is there any left/right input?
    const bool bIsTurning = FMath::Abs(Val) > 0.2f;
 
    // If turning, yaw value is used to influence roll
    // If not turning, roll to reverse current roll value.
    float TargetRollSpeed = bIsTurning ? (CurrentYawSpeed * 0.5f) : (GetActorRotation().Roll * -2.f);
 
    // Smoothly interpolate roll speed
    CurrentRollSpeed = FMath::FInterpTo(CurrentRollSpeed, TargetRollSpeed, GetWorld()->GetDeltaSeconds(), 2.f);
}
 
 
void AFlightPawn::NotifyHit(class UPrimitiveComponent* MyComp, class AActor* Other, class UPrimitiveComponent* OtherComp, bool bSelfMoved, FVector HitLocation, FVector HitNormal, FVector NormalImpulse, const FHitResult& Hit)
{
    Super::NotifyHit(MyComp, Other, OtherComp, bSelfMoved, HitLocation, HitNormal, NormalImpulse, Hit);
 
    // Deflect along the surface when we collide.
    FRotator CurrentRotation = GetActorRotation();
    SetActorRotation(FQuat::Slerp(CurrentRotation.Quaternion(), HitNormal.ToOrientationQuat(), 0.025f));
}
 cs

입력에 맞추어 속도를 조정하고 비행기를 회전시킨다.

그리고 장애물에 충돌하면 매우 빠른속도로 비행기를 회전시킨다.

 

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