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unitysamples / LyraStarterGame /Source /LyraGame /Camera /LyraCameraComponent.cpp
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// Copyright Epic Games, Inc. All Rights Reserved.
#include "LyraCameraComponent.h"
#include "Engine/Canvas.h"
#include "Engine/Engine.h"
#include "GameFramework/Pawn.h"
#include "GameFramework/PlayerController.h"
#include "LyraCameraMode.h"
#include UE_INLINE_GENERATED_CPP_BY_NAME(LyraCameraComponent)
ULyraCameraComponent::ULyraCameraComponent(const FObjectInitializer& ObjectInitializer)
: Super(ObjectInitializer)
{
CameraModeStack = nullptr;
FieldOfViewOffset = 0.0f;
}
void ULyraCameraComponent::OnRegister()
{
Super::OnRegister();
if (!CameraModeStack)
{
CameraModeStack = NewObject<ULyraCameraModeStack>(this);
check(CameraModeStack);
}
}
void ULyraCameraComponent::GetCameraView(float DeltaTime, FMinimalViewInfo& DesiredView)
{
check(CameraModeStack);
UpdateCameraModes();
FLyraCameraModeView CameraModeView;
CameraModeStack->EvaluateStack(DeltaTime, CameraModeView);
// Keep player controller in sync with the latest view.
if (APawn* TargetPawn = Cast<APawn>(GetTargetActor()))
{
if (APlayerController* PC = TargetPawn->GetController<APlayerController>())
{
PC->SetControlRotation(CameraModeView.ControlRotation);
}
}
// Apply any offset that was added to the field of view.
CameraModeView.FieldOfView += FieldOfViewOffset;
FieldOfViewOffset = 0.0f;
// Keep camera component in sync with the latest view.
SetWorldLocationAndRotation(CameraModeView.Location, CameraModeView.Rotation);
FieldOfView = CameraModeView.FieldOfView;
// Fill in desired view.
DesiredView.Location = CameraModeView.Location;
DesiredView.Rotation = CameraModeView.Rotation;
DesiredView.FOV = CameraModeView.FieldOfView;
DesiredView.OrthoWidth = OrthoWidth;
DesiredView.OrthoNearClipPlane = OrthoNearClipPlane;
DesiredView.OrthoFarClipPlane = OrthoFarClipPlane;
DesiredView.AspectRatio = AspectRatio;
DesiredView.bConstrainAspectRatio = bConstrainAspectRatio;
DesiredView.bUseFieldOfViewForLOD = bUseFieldOfViewForLOD;
DesiredView.ProjectionMode = ProjectionMode;
// See if the CameraActor wants to override the PostProcess settings used.
DesiredView.PostProcessBlendWeight = PostProcessBlendWeight;
if (PostProcessBlendWeight > 0.0f)
{
DesiredView.PostProcessSettings = PostProcessSettings;
}
if (IsXRHeadTrackedCamera())
{
// In XR much of the camera behavior above is irrellevant, but the post process settings are not.
Super::GetCameraView(DeltaTime, DesiredView);
}
}
void ULyraCameraComponent::UpdateCameraModes()
{
check(CameraModeStack);
if (CameraModeStack->IsStackActivate())
{
if (DetermineCameraModeDelegate.IsBound())
{
if (const TSubclassOf<ULyraCameraMode> CameraMode = DetermineCameraModeDelegate.Execute())
{
CameraModeStack->PushCameraMode(CameraMode);
}
}
}
}
void ULyraCameraComponent::DrawDebug(UCanvas* Canvas) const
{
check(Canvas);
FDisplayDebugManager& DisplayDebugManager = Canvas->DisplayDebugManager;
DisplayDebugManager.SetFont(GEngine->GetSmallFont());
DisplayDebugManager.SetDrawColor(FColor::Yellow);
DisplayDebugManager.DrawString(FString::Printf(TEXT("LyraCameraComponent: %s"), *GetNameSafe(GetTargetActor())));
DisplayDebugManager.SetDrawColor(FColor::White);
DisplayDebugManager.DrawString(FString::Printf(TEXT(" Location: %s"), *GetComponentLocation().ToCompactString()));
DisplayDebugManager.DrawString(FString::Printf(TEXT(" Rotation: %s"), *GetComponentRotation().ToCompactString()));
DisplayDebugManager.DrawString(FString::Printf(TEXT(" FOV: %f"), FieldOfView));
check(CameraModeStack);
CameraModeStack->DrawDebug(Canvas);
}
void ULyraCameraComponent::GetBlendInfo(float& OutWeightOfTopLayer, FGameplayTag& OutTagOfTopLayer) const
{
check(CameraModeStack);
CameraModeStack->GetBlendInfo(/*out*/ OutWeightOfTopLayer, /*out*/ OutTagOfTopLayer);
}