Yamato/Source/MyProject3/SpaceshipPawn.cpp

#include "SpaceshipPawn.h"
#include "GameFramework/SpringArmComponent.h"
#include "Camera/CameraComponent.h"
#include "Components/StaticMeshComponent.h"
#include "EnhancedInputComponent.h"
#include "EnhancedInputSubsystems.h"
#include "SpaceshipProjectile.h"

ASpaceshipPawn::ASpaceshipPawn()
{
    PrimaryActorTick.bCanEverTick = true;

    // Create ship mesh
    ShipMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("ShipMesh"));
    RootComponent = ShipMesh;
    ShipMesh->SetSimulatePhysics(false);
    ShipMesh->SetEnableGravity(false);

    // Create camera spring arm
    CameraSpringArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("CameraSpringArm"));
    CameraSpringArm->SetupAttachment(RootComponent);
    CameraSpringArm->TargetArmLength = 400.0f;
    CameraSpringArm->bEnableCameraLag = true;
    CameraSpringArm->CameraLagSpeed = 3.0f;
    CameraSpringArm->bEnableCameraRotationLag = true;
    CameraSpringArm->CameraRotationLagSpeed = 10.0f;

    // Create camera
    Camera = CreateDefaultSubobject<UCameraComponent>(TEXT("Camera"));
    Camera->SetupAttachment(CameraSpringArm, USpringArmComponent::SocketName);

    // Initialize movement variables
    CurrentThrust = 0.0f;
    TargetThrust = 0.0f;
    bThrottlePressed = false;
    CurrentVelocity = FVector::ZeroVector;
    CurrentRotation = GetActorQuat();
    TargetRotation = GetActorRotation();
}

void ASpaceshipPawn::BeginPlay()
{
    Super::BeginPlay();

    // Add Input Mapping Context
    if (APlayerController* PlayerController = Cast<APlayerController>(Controller))
    {
        if (UEnhancedInputLocalPlayerSubsystem* Subsystem = ULocalPlayer::GetSubsystem<UEnhancedInputLocalPlayerSubsystem>(PlayerController->GetLocalPlayer()))
        {
            Subsystem->AddMappingContext(DefaultMappingContext, 0);
        }
    }
}

void ASpaceshipPawn::Tick(float DeltaTime)
{
    Super::Tick(DeltaTime);

    // Handle thrust deceleration when not pressing throttle
    if (!bThrottlePressed)
    {
        CurrentThrust = FMath::FInterpTo(CurrentThrust, 0.0f, DeltaTime, ThrustDeceleration);
    }
    else
    {
        CurrentThrust = FMath::FInterpTo(CurrentThrust, TargetThrust, DeltaTime, ThrustAcceleration);
    }

    // Calculate movement
    FVector ThrustDirection = GetActorForwardVector();
    FVector ThrustForce = ThrustDirection * CurrentThrust;

    // Apply drag
    FVector DragForce = -CurrentVelocity * DragCoefficient;

    // Update velocity
    CurrentVelocity += (ThrustForce + DragForce) * DeltaTime;

    // Update position
    FVector NewLocation = GetActorLocation() + (CurrentVelocity * DeltaTime);
    SetActorLocation(NewLocation, true);

    // Smooth rotation using quaternion interpolation
    FQuat TargetQuat = TargetRotation.Quaternion();
    CurrentRotation = FQuat::Slerp(CurrentRotation, TargetQuat, RotationSpeed * DeltaTime);
    SetActorRotation(CurrentRotation);

    // Debug info
    if (GEngine)
    {
        GEngine->AddOnScreenDebugMessage(-1, 0.0f, FColor::Yellow,
            FString::Printf(TEXT("Thrust: %.2f"), CurrentThrust));
        GEngine->AddOnScreenDebugMessage(-1, 0.0f, FColor::Green,
            FString::Printf(TEXT("Velocity: %.2f"), CurrentVelocity.Size()));
    }
}

void ASpaceshipPawn::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{
    Super::SetupPlayerInputComponent(PlayerInputComponent);

    if (UEnhancedInputComponent* EnhancedInputComponent = CastChecked<UEnhancedInputComponent>(PlayerInputComponent))
    {
        // Bind both Hold and Released events for throttle
        EnhancedInputComponent->BindAction(ThrottleAction, ETriggerEvent::Started, this, &ASpaceshipPawn::HandleThrottleStarted);
        EnhancedInputComponent->BindAction(ThrottleAction, ETriggerEvent::Completed, this, &ASpaceshipPawn::HandleThrottleReleased);

        // Bind mouse control
        EnhancedInputComponent->BindAction(MouseControlAction, ETriggerEvent::Started, this, &ASpaceshipPawn::HandleMouseControl);

        // Bind fire action
        EnhancedInputComponent->BindAction(FireAction, ETriggerEvent::Triggered, this, &ASpaceshipPawn::HandleFire);
    }
}

// Split the throttle handling into two functions
void ASpaceshipPawn::HandleThrottleStarted(const FInputActionValue& Value)
{
    const float ThrottleValue = Value.Get<float>();
    bThrottlePressed = true;
    TargetThrust = ThrottleValue * MaxThrust;
}

void ASpaceshipPawn::HandleThrottleReleased(const FInputActionValue& Value)
{
    bThrottlePressed = false;
}

void ASpaceshipPawn::HandleMouseControl(const FInputActionValue& Value)
{
    const FVector2D MouseValue = Value.Get<FVector2D>();

    // Get current rotation
    FRotator CurrentRot = GetActorRotation();

    // Calculate new rotation values
    float NewPitch = CurrentRot.Pitch + (-MouseValue.Y * RotationSpeed * GetWorld()->GetDeltaSeconds());
    float NewYaw = CurrentRot.Yaw + (MouseValue.X * RotationSpeed * GetWorld()->GetDeltaSeconds());

    // Clamp pitch to prevent flipping
    NewPitch = FMath::ClampAngle(NewPitch, -85.0f, 85.0f);

    // Set target rotation
    TargetRotation = FRotator(NewPitch, NewYaw, CurrentRot.Roll);

    // Update camera spring arm rotation to match
    CameraSpringArm->SetRelativeRotation(FRotator(NewPitch * 0.3f, 0.0f, 0.0f));
}

void ASpaceshipPawn::HandleFire(const FInputActionValue& Value)
{
    UWorld* World = GetWorld();
    if (World)
    {
        FVector SpawnLocation = ShipMesh->GetSocketLocation(TEXT("ProjectileSpawn"));
        if (SpawnLocation == FVector::ZeroVector)
        {
            SpawnLocation = GetActorLocation() + (GetActorForwardVector() * 100.0f);
        }

        FRotator SpawnRotation = GetActorRotation();
        FActorSpawnParameters SpawnParams;
        SpawnParams.Owner = this;
        SpawnParams.Instigator = GetInstigator();

        World->SpawnActor<ASpaceshipProjectile>(
            ASpaceshipProjectile::StaticClass(),
            SpawnLocation,
            SpawnRotation,
            SpawnParams
        );
    }
}