Tank Player Controller

TankPlayerController.cpp

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

#include "TankPlayerController.h"
#include "GameFramework/Actor.h"
#include "GameFramework/Pawn.h"
#include "Engine/World.h"
#include "GameFramework/Controller.h"


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

	auto ControlledTank = GetControlledTank();
	if (!ControlledTank)
	{
		UE_LOG(LogTemp, Warning, TEXT("PlayerController Begin Play"));
	}
	else
	{
		UE_LOG(LogTemp, Warning, TEXT("PlayerController possessing: %s"), *(ControlledTank->GetName()))
	}

}

ATank * ATankPlayerController::GetControlledTank() const {
	return Cast<ATank>(GetPawn());
};

void ATankPlayerController::AimTowardsCrosshair()
{
	if (!GetControlledTank()) { return; }

	FVector HitLocation;
	if (GetSightRayHitLocation(HitLocation))
	{
		GetControlledTank()->AImAt(HitLocation);
	}
}

// Called every frame
void ATankPlayerController::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);
	AimTowardsCrosshair();
}

bool ATankPlayerController::GetSightRayHitLocation(FVector& HitLocation) const
{
	//Find the crosshair position in pixels coordinates
	int32 ViewPortSizeX, ViewPortSizeY;
	GetViewportSize(ViewPortSizeX, ViewPortSizeY);
	auto ScreenLocation = FVector2D(ViewPortSizeX * CrossHairXLocation, ViewPortSizeY * CrossHairYLocation);
	FVector LookDirection;
	if (GetLookDirection(ScreenLocation, LookDirection))
	{
		GetLookVectorHitLocation(LookDirection, HitLocation);
	}
	
	return false;
}

bool ATankPlayerController::GetLookDirection(FVector2D ScreenLocation, FVector& LookDirection) const
{
	FVector CameraWorldLocation;
	return DeprojectScreenPositionToWorld(ScreenLocation.X, ScreenLocation.Y, CameraWorldLocation, LookDirection);

}

bool ATankPlayerController::GetLookVectorHitLocation(FVector LookDirection, FVector&HitLocation) const
{
	FHitResult HitResult;
	auto StartLocation = PlayerCameraManager->GetCameraLocation();
	auto EndLocation = StartLocation + (LookDirection * LineTraceRange);
	if (GetWorld()->LineTraceSingleByChannel(HitResult, StartLocation, EndLocation, ECollisionChannel::ECC_Visibility))
	{
		HitLocation = HitResult.Location;
		return true;
	}
	HitLocation = FVector(0);
	return false;
}