87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
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// Copyright Epic Games, Inc. All Rights Reserved.
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#include "ThumbnailRendering/LevelThumbnailRenderer.h"
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#include "EngineDefines.h"
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#include "Misc/App.h"
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#include "Engine/Level.h"
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#include "ShowFlags.h"
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#include "SceneView.h"
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#include "Engine/LevelBounds.h"
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ULevelThumbnailRenderer::ULevelThumbnailRenderer(const FObjectInitializer& ObjectInitializer)
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: Super(ObjectInitializer)
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{
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}
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void ULevelThumbnailRenderer::Draw(UObject* Object, int32 X, int32 Y, uint32 Width, uint32 Height, FRenderTarget* RenderTarget, FCanvas* Canvas, bool bAdditionalViewFamily)
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{
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ULevel* Level = Cast<ULevel>(Object);
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if (Level != nullptr)
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{
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FSceneViewFamilyContext ViewFamily(FSceneViewFamily::ConstructionValues(RenderTarget, Level->OwningWorld->Scene, FEngineShowFlags(ESFIM_Game))
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.SetWorldTimes(FApp::GetCurrentTime() - GStartTime, FApp::GetDeltaTime(), FApp::GetCurrentTime() - GStartTime)
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.SetAdditionalViewFamily(bAdditionalViewFamily));
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ViewFamily.EngineShowFlags.DisableAdvancedFeatures();
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ViewFamily.EngineShowFlags.MotionBlur = 0;
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ViewFamily.EngineShowFlags.SetDistanceCulledPrimitives(true); // show distance culled objects
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ViewFamily.EngineShowFlags.SetPostProcessing(false);
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GetView(Level, &ViewFamily, X, Y, Width, Height);
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if (ViewFamily.Views.Num() > 0)
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{
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RenderViewFamily(Canvas, &ViewFamily);
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}
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}
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}
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void ULevelThumbnailRenderer::GetView(ULevel* Level, FSceneViewFamily* ViewFamily, int32 X, int32 Y, uint32 SizeX, uint32 SizeY) const
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{
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check(ViewFamily);
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FIntRect ViewRect(
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FMath::Max<int32>(X, 0),
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FMath::Max<int32>(Y, 0),
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FMath::Max<int32>(X + SizeX, 0),
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FMath::Max<int32>(Y + SizeY, 0));
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FBox LevelBox(ForceInit);
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if (Level->LevelBoundsActor.IsValid())
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{
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LevelBox = Level->LevelBoundsActor.Get()->GetComponentsBoundingBox();
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}
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else
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{
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LevelBox = ALevelBounds::CalculateLevelBounds(Level);
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}
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if (ViewRect.Width() > 0 && ViewRect.Height() > 0)
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{
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FSceneViewInitOptions ViewInitOptions;
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ViewInitOptions.SetViewRectangle(ViewRect);
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ViewInitOptions.ViewFamily = ViewFamily;
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const FVector ViewPoint = LevelBox.GetCenter();
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ViewInitOptions.ViewOrigin = FVector(ViewPoint.X, ViewPoint.Y, 0);
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ViewInitOptions.ViewRotationMatrix = FMatrix(
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FPlane(1, 0, 0, 0),
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FPlane(0, -1, 0, 0),
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FPlane(0, 0, -1, 0),
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FPlane(0, 0, 0, 1));
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const float ZOffset = WORLD_MAX;
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ViewInitOptions.ProjectionMatrix = FReversedZOrthoMatrix(
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LevelBox.GetSize().X / 2.f,
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LevelBox.GetSize().Y / 2.f,
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0.5f / ZOffset,
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ZOffset);
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FSceneView* NewView = new FSceneView(ViewInitOptions);
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ViewFamily->Views.Add(NewView);
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}
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}
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