[UE] Multiplayer 2: Online Subsystem Steam

#pragma once
#include "CoreMinimal.h"
#include "GameFramework/Character.h"
#include "MultiplayerCharacter.generated.h"
 
UCLASS(config=Game)
class AMultiplayerCharacter : 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:
	AMultiplayerCharacter();
 
	/** Base turn rate, in deg/sec. Other scaling may affect final turn rate. */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Input)
	float TurnRateGamepad;
 
protected:
 
	/** 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);
 
protected:
	// 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; }
 
public:
	//Pointer to the online session interface
	TSharedPtr<class IOnlineSession, ESPMode::ThreadSafe> OnlineSessionInterface;
};

#include "MultiplayerCharacter.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"
#include "OnlineSubsystem.h"
#include "Interfaces/OnlineSessionInterface.h"
 
//////////////////////////////////////////////////////////////////////////
// AMultiplayerCharacter
 
AMultiplayerCharacter::AMultiplayerCharacter()
{
	// Set size for collision capsule
	GetCapsuleComponent()->InitCapsuleSize(42.f, 96.0f);
 
	// set our turn rate for input
	TurnRateGamepad = 50.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, 500.0f, 0.0f); // ...at this rotation rate
 
	// Note: For faster iteration times these variables, and many more, can be tweaked in the Character Blueprint
	// instead of recompiling to adjust them
	GetCharacterMovement()->JumpZVelocity = 700.f;
	GetCharacterMovement()->AirControl = 0.35f;
	GetCharacterMovement()->MaxWalkSpeed = 500.f;
	GetCharacterMovement()->MinAnalogWalkSpeed = 20.f;
	GetCharacterMovement()->BrakingDecelerationWalking = 2000.f;
 
	// Create a camera boom (pulls in towards the player if there is a collision)
	CameraBoom = CreateDefaultSubobject<USpringArmComponent>(TEXT("CameraBoom"));
	CameraBoom->SetupAttachment(RootComponent);
	CameraBoom->TargetArmLength = 400.0f; // 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 ThirdPersonCharacter (to avoid direct content references in C++)
 
	IOnlineSubsystem* OnlineSubsystem = IOnlineSubsystem::Get();
	if (OnlineSubsystem)
	{
		OnlineSessionInterface = OnlineSubsystem->GetSessionInterface();
 
		if (GEngine)
		{
			GEngine->AddOnScreenDebugMessage(
				-1,
				15.0f,
				FColor::Blue,
				FString::Printf(TEXT("I found SubSystem %s"), *OnlineSubsystem->GetSubsystemName().ToString())
			);
		}
	}
}
 
//////////////////////////////////////////////////////////////////////////
// Input
 
void AMultiplayerCharacter::SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent)
{
	// Set up gameplay key bindings
	check(PlayerInputComponent);
	PlayerInputComponent->BindAction("Jump", IE_Pressed, this, &ACharacter::Jump);
	PlayerInputComponent->BindAction("Jump", IE_Released, this, &ACharacter::StopJumping);
 
	PlayerInputComponent->BindAxis("Move Forward / Backward", this, &AMultiplayerCharacter::MoveForward);
	PlayerInputComponent->BindAxis("Move Right / Left", this, &AMultiplayerCharacter::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 Right / Left Mouse", this, &APawn::AddControllerYawInput);
	PlayerInputComponent->BindAxis("Turn Right / Left Gamepad", this, &AMultiplayerCharacter::TurnAtRate);
	PlayerInputComponent->BindAxis("Look Up / Down Mouse", this, &APawn::AddControllerPitchInput);
	PlayerInputComponent->BindAxis("Look Up / Down Gamepad", this, &AMultiplayerCharacter::LookUpAtRate);
 
	// handle touch devices
	PlayerInputComponent->BindTouch(IE_Pressed, this, &AMultiplayerCharacter::TouchStarted);
	PlayerInputComponent->BindTouch(IE_Released, this, &AMultiplayerCharacter::TouchStopped);
}
 
void AMultiplayerCharacter::TouchStarted(ETouchIndex::Type FingerIndex, FVector Location)
{
	Jump();
}
 
void AMultiplayerCharacter::TouchStopped(ETouchIndex::Type FingerIndex, FVector Location)
{
	StopJumping();
}
 
void AMultiplayerCharacter::TurnAtRate(float Rate)
{
	// calculate delta for this frame from the rate information
	AddControllerYawInput(Rate * TurnRateGamepad * GetWorld()->GetDeltaSeconds());
}
 
void AMultiplayerCharacter::LookUpAtRate(float Rate)
{
	// calculate delta for this frame from the rate information
	AddControllerPitchInput(Rate * TurnRateGamepad * GetWorld()->GetDeltaSeconds());
}
 
void AMultiplayerCharacter::MoveForward(float Value)
{
	if ((Controller != nullptr) && (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 AMultiplayerCharacter::MoveRight(float Value)
{
	if ( (Controller != nullptr) && (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);
	}
}