DynamicHieghtFloor.cpp

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// Copyright(c) Pixo Group. All Rights Reserved.
 
 
#include "Utilities/DynamicHieghtFloor.h"
#include "HeadMountedDisplayFunctionLibrary.h"
#include "Engine/Engine.h"
#include "IXRTrackingSystem.h"
#include "PixoVRCharacter.h"
#include "Components/BoxComponent.h"
#include "Kismet/GameplayStatics.h"
#include "Kismet/KismetMathLibrary.h"
 
ADynamicHieghtFloor::ADynamicHieghtFloor()
{
    PrimaryActorTick.bCanEverTick = true;
    
    BoxCollision = CreateDefaultSubobject<UBoxComponent>("BoxCollision");
    BoxCollision->InitBoxExtent(FVector(100,100,24));
}
 
void ADynamicHieghtFloor::BeginPlay()
{
    Super::BeginPlay();
    if (UGameplayStatics::GetPlatformName() == "Android" && GEngine->XRSystem->IsHeadTrackingAllowed())
    {
        GetWorldTimerManager().SetTimerForNextTick(this, &ADynamicHieghtFloor::AdjustCameraHeight);
    }
}
 
void ADynamicHieghtFloor::AdjustCameraHeight()
{
    FRotator DeviceOrientation;
    FVector DevicePosition;
    
    //Get Device Camera position
    UHeadMountedDisplayFunctionLibrary::GetOrientationAndPosition(DeviceOrientation, DevicePosition);
 
    // Temporary decision, need investigation 
    if (UHeadMountedDisplayFunctionLibrary::GetHMDDeviceName() == "OculusHMD")
    {
        return;
    }
    
    //Get difference between floor and Device Camera Position
    const float RelativeHeight = UKismetMathLibrary::TransformLocation(BoxCollision->GetComponentTransform(), DevicePosition).Z;
 
    //Set floor to adjust Camera position
    SetFloorHeight(DesiredCameraHeight - RelativeHeight);
}
 
void ADynamicHieghtFloor::SetFloorHeight(float Height)
{
    if (Height > 100.0 || Height < -100.0)
    {
        GEngine->AddOnScreenDebugMessage(-1, 10.0, FColor::Red, TEXT("Error - Floor height is more/less than 100 units"));
        UE_LOG(LogTemp, Error, TEXT("Error - Floor height is more/less than 100 units"));
        return;
    }
    BoxCollision->SetRelativeLocation(FVector(.0, .0, Height));
}