TestPawn Main

// Fill out your copyright notice in the Description page of Project Settings.

#include "TestPawn.h"

// Sets default values
ATestPawn::ATestPawn() {
	// Set this pawn to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
	PrimaryActorTick.bCanEverTick = true;

	//Create our components
	RootComponent = CreateDefaultSubobject<USceneComponent>(TEXT("RootComponent"));
	OurCameraSpringArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("CameraSpringArm"));
	OurCameraSpringArm->SetupAttachment(RootComponent);
	OurCameraSpringArm->SetRelativeLocationAndRotation(FVector(0.0f, 0.0f, 20.0f), FRotator(-45.0f, 0.0f, 0.0f));
	OurCameraSpringArm->TargetArmLength = 400.f;
	OurCameraSpringArm->bEnableCameraLag = true;
	OurCameraSpringArm->CameraLagSpeed = 1000.0f;

	OurCamera = CreateDefaultSubobject<UCameraComponent>(TEXT("GameCamera"));
	OurCamera->SetupAttachment(OurCameraSpringArm, USpringArmComponent::SocketName);

	//Take control of the default Player
	AutoPossessPlayer = EAutoReceiveInput::Player0;
}

// Called when the game starts or when spawned
void ATestPawn::BeginPlay() {
	Super::BeginPlay();

	//Take control of the default Player
	AutoPossessPlayer = EAutoReceiveInput::Player0;
}

// Called every frame
void ATestPawn::Tick(float DeltaTime) {
	Super::Tick(DeltaTime);

	//Zoom in if ZoomIn button is down, zoom back out if it's not
	{
		if (bZoomingIn) {
			ZoomFactor += DeltaTime / 0.5f;         //Zoom in over half a second
		}
		else {
			ZoomFactor -= DeltaTime / 0.25f;        //Zoom out over a quarter of a second
		}
		ZoomFactor = FMath::Clamp<float>(ZoomFactor, 0.0f, 1.0f);
		//Blend our camera's FOV and our SpringArm's length based on ZoomFactor
		OurCamera->FieldOfView = FMath::Lerp<float>(90.0f, 60.0f, ZoomFactor);
		OurCameraSpringArm->TargetArmLength = FMath::Lerp<float>(400.0f, 300.0f, ZoomFactor);
	}

	//Rotate our actor's yaw, which will turn our camera because we're attached to it
	{
		FRotator NewRotation = GetActorRotation();
		NewRotation.Yaw += CameraInput.X;
		SetActorRotation(NewRotation);
	}

	//Rotate our camera's pitch, but limit it so we're always looking downward
	{
		FRotator NewRotation = OurCameraSpringArm->GetComponentRotation();
		NewRotation.Pitch = FMath::Clamp(NewRotation.Pitch + CameraInput.Y, -80.0f, -15.0f);
		OurCameraSpringArm->SetWorldRotation(NewRotation);
	}

	//Handle movement based on our "MoveX" and "MoveY" axes
	{
		if (!MovementInput.IsZero()) {
			//Scale our movement input axis values by 100 units per second
			MovementInput = MovementInput.GetSafeNormal() * 1000.0f;
			FVector NewLocation = GetNewLocation(GetActorLocation());
			SetActorLocation(NewLocation);
		}
	}
}

FVector ATestPawn::GetNewLocation(FVector current) {
	FVector out = current;
	out += GetActorForwardVector() * MovementInput.X;
	out  += GetActorRightVector() * MovementInput.Y;
	return out;
}

// Called to bind functionality to input
void ATestPawn::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent) {
	Super::SetupPlayerInputComponent(PlayerInputComponent);

	//Hook up events for "ZoomIn"
	InputComponent->BindAction("ZoomIn", IE_Pressed, this, &ATestPawn::ZoomIn);
	InputComponent->BindAction("ZoomIn", IE_Released, this, &ATestPawn::ZoomOut);

	//Hook up every-frame handling for our four axes
	InputComponent->BindAxis("P1MoveForward", this, &ATestPawn::MoveForward);
	InputComponent->BindAxis("P1MoveRight", this, &ATestPawn::MoveRight);
	InputComponent->BindAxis("CameraPitch", this, &ATestPawn::PitchCamera);
	InputComponent->BindAxis("CameraYaw", this, &ATestPawn::YawCamera);
}

//Input functions
void ATestPawn::MoveForward(float AxisValue) {
	MovementInput.X = FMath::Clamp<float>(AxisValue, -1.0f, 1.0f);
}

void ATestPawn::MoveRight(float AxisValue) {
	MovementInput.Y = FMath::Clamp<float>(AxisValue, -1.0f, 1.0f);
}

void ATestPawn::PitchCamera(float AxisValue) {
	CameraInput.Y = AxisValue;
}

void ATestPawn::YawCamera(float AxisValue) {
	CameraInput.X = AxisValue;
}

void ATestPawn::ZoomIn() {
	bZoomingIn = true;
}

void ATestPawn::ZoomOut() {
	bZoomingIn = false;
}