jetpackCharacter.cpp

// Copyright Epic Games, Inc. All Rights Reserved.

#include "jetpackCharacter.h"
#include "HeadMountedDisplayFunctionLibrary.h"
#include "Camera/CameraComponent.h"
#include "Components/CapsuleComponent.h"
#include "Components/InputComponent.h"
#include "GameFramework/CharacterMovementComponent.h"
#include "GameFramework/Controller.h"
#include "GameFramework/SpringArmComponent.h"

//////////////////////////////////////////////////////////////////////////
// AjetpackCharacter

AjetpackCharacter::AjetpackCharacter() {
	// Set size for collision capsule
	GetCapsuleComponent()->InitCapsuleSize(42.f, 96.0f);

	// set our turn rates for input
	BaseTurnRate = 45.f;
	BaseLookUpRate = 45.f;

	// Don't rotate when the controller rotates. Let that just affect the camera.
	bUseControllerRotationPitch = false;
	bUseControllerRotationYaw = false;
	bUseControllerRotationRoll = false;

	// Configure character movement
	GetCharacterMovement()->bOrientRotationToMovement = true; // Character moves in the direction of input...	
	GetCharacterMovement()->RotationRate = FRotator(0.0f, 540.0f, 0.0f); // ...at this rotation rate
	GetCharacterMovement()->JumpZVelocity = 600.f;
	GetCharacterMovement()->AirControl = 0.2f;

	// Create a camera boom (pulls in towards the player if there is a collision)
	CameraBoom = CreateDefaultSubobject<USpringArmComponent>(TEXT("CameraBoom"));
	CameraBoom->SetupAttachment(RootComponent);
	CameraBoom->TargetArmLength = 300.0f; // The camera follows at this distance behind the character	
	CameraBoom->bUsePawnControlRotation = true; // Rotate the arm based on the controller

	// Create a follow camera
	FollowCamera = CreateDefaultSubobject<UCameraComponent>(TEXT("FollowCamera"));
	FollowCamera->SetupAttachment(CameraBoom, USpringArmComponent::SocketName); // Attach the camera to the end of the boom and let the boom adjust to match the controller orientation
	FollowCamera->bUsePawnControlRotation = false; // Camera does not rotate relative to arm

	// Note: The skeletal mesh and anim blueprint references on the Mesh component (inherited from Character) 
	// are set in the derived blueprint asset named MyCharacter (to avoid direct content references in C++)
}

//////////////////////////////////////////////////////////////////////////
// Input

void AjetpackCharacter::SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) {
	// Set up gameplay key bindings
	check(PlayerInputComponent);
	PlayerInputComponent->BindAction("Jump", IE_Pressed, this, &AjetpackCharacter::EnableJetpack);
	PlayerInputComponent->BindAction("Jump", IE_Released, this, &AjetpackCharacter::DisableJetpack);

	PlayerInputComponent->BindAxis("MoveForward", this, &AjetpackCharacter::MoveForward);
	PlayerInputComponent->BindAxis("MoveRight", this, &AjetpackCharacter::MoveRight);

	// We have 2 versions of the rotation bindings to handle different kinds of devices differently
	// "turn" handles devices that provide an absolute delta, such as a mouse.
	// "turnrate" is for devices that we choose to treat as a rate of change, such as an analog joystick
	PlayerInputComponent->BindAxis("Turn", this, &APawn::AddControllerYawInput);
	PlayerInputComponent->BindAxis("TurnRate", this, &AjetpackCharacter::TurnAtRate);
	PlayerInputComponent->BindAxis("LookUp", this, &APawn::AddControllerPitchInput);
	PlayerInputComponent->BindAxis("LookUpRate", this, &AjetpackCharacter::LookUpAtRate);

	// handle touch devices
	PlayerInputComponent->BindTouch(IE_Pressed, this, &AjetpackCharacter::TouchStarted);
	PlayerInputComponent->BindTouch(IE_Released, this, &AjetpackCharacter::TouchStopped);

	// VR headset functionality
	PlayerInputComponent->BindAction("ResetVR", IE_Pressed, this, &AjetpackCharacter::OnResetVR);
}

void AjetpackCharacter::GetLifetimeReplicatedProps(TArray <FLifetimeProperty> &OutLifetimeProps) const {
	Super::GetLifetimeReplicatedProps(OutLifetimeProps);
}

void AjetpackCharacter::FireJetpack_Implementation() {
	UCharacterMovementComponent *movement = GetCharacterMovement();

	if (jetpack_active) {
		movement->MovementMode = MOVE_Flying;

		FVector velocity = movement->Velocity;
		velocity.Z += 25.0f;
		movement->Velocity = velocity;

		//FVector force = FVector::UpVector;
		//force = force * 250.0f;
		//movement->AddForce(force);
	} else {
		if (movement->MovementMode == MOVE_Flying) {
			movement->MovementMode = MOVE_Falling;
		}
	}
}

void AjetpackCharacter::Tick(float DeltaSeconds) {
	UCharacterMovementComponent *movement = GetCharacterMovement();
	ENetRole net_role = GetLocalRole();

	FireJetpack();

	if (net_role == ROLE_Authority) {
	} else {
	}
}

void AjetpackCharacter::SetJetpackFiringOnServer_Implementation(bool firing) {
	//GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Orange, FString::Printf(TEXT("local role = %d"), GetLocalRole()));
	//GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Orange, FString::Printf(TEXT("remote  role = %d"), GetRemoteRole()));
	jetpack_active = firing;
}

void AjetpackCharacter::EnableJetpack() {
	SetJetpackFiringOnServer(true);
	//jetpack_enabled = true;
	//GetCharacterMovement()->MovementMode = MOVE_Flying;
}

void AjetpackCharacter::DisableJetpack() {
	SetJetpackFiringOnServer(false);
	//jetpack_enabled = false;
	//GetCharacterMovement()->MovementMode = MOVE_Falling;
}

void AjetpackCharacter::OnResetVR() {
	UHeadMountedDisplayFunctionLibrary::ResetOrientationAndPosition();
}

void AjetpackCharacter::TouchStarted(ETouchIndex::Type FingerIndex, FVector Location) {
	Jump();
}

void AjetpackCharacter::TouchStopped(ETouchIndex::Type FingerIndex, FVector Location) {
	StopJumping();
}

void AjetpackCharacter::TurnAtRate(float Rate) {
	// calculate delta for this frame from the rate information
	AddControllerYawInput(Rate * BaseTurnRate * GetWorld()->GetDeltaSeconds());
}

void AjetpackCharacter::LookUpAtRate(float Rate) {
	// calculate delta for this frame from the rate information
	AddControllerPitchInput(Rate * BaseLookUpRate * GetWorld()->GetDeltaSeconds());
}

void AjetpackCharacter::MoveForward(float Value) {
	if ((Controller != NULL) && (Value != 0.0f))
	{
		// find out which way is forward
		const FRotator Rotation = Controller->GetControlRotation();
		const FRotator YawRotation(0, Rotation.Yaw, 0);

		// get forward vector
		const FVector Direction = FRotationMatrix(YawRotation).GetUnitAxis(EAxis::X);
		AddMovementInput(Direction, Value);
	}
}

void AjetpackCharacter::MoveRight(float Value) {
	if ( (Controller != NULL) && (Value != 0.0f) )
	{
		// find out which way is right
		const FRotator Rotation = Controller->GetControlRotation();
		const FRotator YawRotation(0, Rotation.Yaw, 0);
	
		// get right vector 
		const FVector Direction = FRotationMatrix(YawRotation).GetUnitAxis(EAxis::Y);
		// add movement in that direction
		AddMovementInput(Direction, Value);
	}
}

jetpackCharacter.h

// Copyright Epic Games, Inc. All Rights Reserved.

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Character.h"
#include "Net/UnrealNetwork.h"
#include "jetpackCharacter.generated.h"

UCLASS(config=Game)
class AjetpackCharacter : public ACharacter {
	GENERATED_BODY()

	/** Camera boom positioning the camera behind the character */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Camera, meta = (AllowPrivateAccess = "true"))
	class USpringArmComponent* CameraBoom;

	/** Follow camera */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Camera, meta = (AllowPrivateAccess = "true"))
	class UCameraComponent* FollowCamera;
public:
	AjetpackCharacter();

	/** Property replication */
	void GetLifetimeReplicatedProps(TArray<FLifetimeProperty> &OutLifetimeProps) const override;

	/** Base turn rate, in deg/sec. Other scaling may affect final turn rate. */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Camera)
	float BaseTurnRate;

	/** Base look up/down rate, in deg/sec. Other scaling may affect final rate. */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Camera)
	float BaseLookUpRate;

protected:

	UPROPERTY(Replicated)
	bool jetpack_active = false;

	UFUNCTION(NetMulticast, Unreliable)
	void FireJetpack();

	UFUNCTION(Server, Unreliable)
	void SetJetpackFiringOnServer(bool firing);

	/** Resets HMD orientation in VR. */
	void OnResetVR();

	/** Called for forwards/backward input */
	void MoveForward(float Value);

	/** Called for side to side input */
	void MoveRight(float Value);

	/** 
	 * Called via input to turn at a given rate. 
	 * @param Rate	This is a normalized rate, i.e. 1.0 means 100% of desired turn rate
	 */
	void TurnAtRate(float Rate);

	/**
	 * Called via input to turn look up/down at a given rate. 
	 * @param Rate	This is a normalized rate, i.e. 1.0 means 100% of desired turn rate
	 */
	void LookUpAtRate(float Rate);

	/** Handler for when a touch input begins. */
	void TouchStarted(ETouchIndex::Type FingerIndex, FVector Location);

	/** Handler for when a touch input stops. */
	void TouchStopped(ETouchIndex::Type FingerIndex, FVector Location);

	void EnableJetpack();
	void DisableJetpack();

protected:

	virtual void Tick(float DeltaSeconds) override;

	// APawn interface
	virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;
	// End of APawn interface

public:
	/** Returns CameraBoom subobject **/
	FORCEINLINE class USpringArmComponent* GetCameraBoom() const { return CameraBoom; }
	/** Returns FollowCamera subobject **/
	FORCEINLINE class UCameraComponent* GetFollowCamera() const { return FollowCamera; }
};