98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
#include "CameraCaptureActor.h"
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#include "Components/SceneCaptureComponent2D.h"
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#include "Camera/CameraComponent.h"
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#include "Engine/TextureRenderTarget2D.h"
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ACameraCaptureActor::ACameraCaptureActor()
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{
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// PrimaryActorTick.bCanEverTick = false;
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}
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void ACameraCaptureActor::BeginPlay()
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{
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Super::BeginPlay();
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BuildViewCaptures();
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}
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#if WITH_EDITOR
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void ACameraCaptureActor::PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent)
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{
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Super::PostEditChangeProperty(PropertyChangedEvent);
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// 任何关键参数变化都重建（避免 RT 尺寸/数量不匹配）
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BuildViewCaptures();
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}
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#endif
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void ACameraCaptureActor::BuildViewCaptures()
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{
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if (ViewCapture)
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{
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ViewCapture->DestroyComponent();
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ViewCapture = nullptr;
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}
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if (ViewRT)
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{
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ViewRT = nullptr;
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}
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ViewRT = NewObject<UTextureRenderTarget2D>(this);
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ViewRT->ClearColor = FLinearColor::Black;
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ViewRT->InitAutoFormat(ViewWidth, ViewHeight);
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ViewRT->UpdateResourceImmediate(true);
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ViewCapture = NewObject<USceneCaptureComponent2D>(this, TEXT("ViewCapture"));
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ViewCapture->SetupAttachment(GetRootComponent());
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ViewCapture->RegisterComponent();
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ViewCapture->TextureTarget = ViewRT;
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ViewCapture->CaptureSource = ESceneCaptureSource::SCS_FinalColorHDR;
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ViewCapture->bCaptureEveryFrame = false;
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ViewCapture->bCaptureOnMovement = false;
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ViewCapture->PostProcessBlendWeight = 1.0f;
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ViewCapture->PostProcessSettings.bOverride_AutoExposureMethod = true;
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ViewCapture->PostProcessSettings.AutoExposureMethod = EAutoExposureMethod::AEM_Manual;
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ViewCapture->PostProcessSettings.bOverride_AutoExposureBias = true;
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ViewCapture->PostProcessSettings.AutoExposureBias = 1.0f;
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ViewCapture->SetRelativeLocation(FVector::ZeroVector);
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ViewCapture->SetRelativeRotation(FRotator::ZeroRotator);
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}
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void ACameraCaptureActor::UpdateViewTransforms(const int32 Index)
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{
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// 以本 Actor（CameraActor）的 transform 为中心
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const FVector Center = GetActorLocation();
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const FRotator Rot = GetActorRotation();
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const FVector Right = Rot.Quaternion().GetRightVector();
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// FOV 从主 CameraComponent 取
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float FOV = 90.f;
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if (UCameraComponent* Cam = GetCameraComponent())
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{
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FOV = Cam->FieldOfView;
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}
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if (ViewCapture)
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{
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// 线性水平分布：居中对称
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const float Offset = (Index - (ViewCount - 1) * 0.5f) * Baseline;
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const FVector Pos = Center + Right * Offset;
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ViewCapture->SetWorldLocationAndRotation(Pos, Rot);
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ViewCapture->FOVAngle = FOV;
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}
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}
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void ACameraCaptureActor::CaptureViews()
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{
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ViewCapture->CaptureScene();
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}
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