Android build settings + metaxr

Plugins/MetaXR/Source/MRUtilityKitEditor/MRUtilityKitEditor.Build.cs

@@ -0,0 +1,38 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+
+using UnrealBuildTool;
+
+public class MRUtilityKitEditor : ModuleRules
+{
+    public MRUtilityKitEditor(ReadOnlyTargetRules Target) : base(Target)
+    {
+        bUseUnity = true;
+
+        PCHUsage = ModuleRules.PCHUsageMode.UseExplicitOrSharedPCHs;
+
+        PublicDependencyModuleNames.AddRange(
+            new string[]
+            {
+                "Core",
+            });
+
+
+        PrivateDependencyModuleNames.AddRange(
+            new string[]
+            {
+                "CoreUObject",
+                "Engine",
+                "Slate",
+                "SlateCore",
+                "OculusXRHMD",
+                "OculusXRAnchors",
+                "OculusXRScene",
+                "Json",
+                "UnrealEd",
+                "RHI",
+                "RenderCore",
+                "ProceduralMeshComponent",
+                "MRUtilityKit",
+            });
+    }
+}

Plugins/MetaXR/Source/MRUtilityKitEditor/Private/MRUtilityKitDistanceMap.spec.cpp

@@ -0,0 +1,214 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+
+#include "DistanceMapTestData.h"
+#include "Editor.h"
+#include "Editor/UnrealEdEngine.h"
+#include "Engine/CanvasRenderTarget2D.h"
+#include "HAL/PlatformFileManager.h"
+#include "Misc/EngineVersionComparison.h"
+#include "MRUtilityKitDistanceMapGenerator.h"
+#include "MRUtilityKitSubsystem.h"
+#include "TestHelper.h"
+#include "Tests/AutomationEditorCommon.h"
+#include "TextureResource.h"
+#include "UnrealEdGlobals.h"
+
+static void WriteTGA(const FString& FilePath, const TArray<FColor>& Pixels, int32 Width, int32 Height)
+{
+	// Create file
+	IFileHandle* FileHandle = FPlatformFileManager::Get().GetPlatformFile().OpenWrite(*FilePath);
+	if (FileHandle)
+	{
+		// TGA File Header
+		uint8 TGAHeader[18] = {};
+		TGAHeader[2] = 2; // Uncompressed Type
+		TGAHeader[12] = Width & 0xFF;
+		TGAHeader[13] = (Width >> 8) & 0xFF;
+		TGAHeader[14] = Height & 0xFF;
+		TGAHeader[15] = (Height >> 8) & 0xFF;
+		TGAHeader[16] = 32;	  // Bits per Pixel
+		TGAHeader[17] = 0x20; // Top-Down, Non-Interlaced
+		// Write TGA Header
+		FileHandle->Write(TGAHeader, sizeof(TGAHeader));
+		// Write Pixels
+		for (int32 i = 0; i < Width * Height; i++)
+		{
+			const FColor& Pixel = Pixels[i];
+			uint8 BGRA[4] = { Pixel.B, Pixel.G, Pixel.R, Pixel.A };
+			FileHandle->Write(BGRA, sizeof(BGRA));
+		}
+
+		// Close the file
+		delete FileHandle;
+	}
+	else
+	{
+		UE_LOG(LogTemp, Warning, TEXT("Failed to open file for writing: %s"), *FilePath);
+	}
+}
+
+static TArray<FColor> ReadTGAFromMemory(const uint8* Data, size_t DataSize)
+{
+	TArray<FColor> Pixels;
+
+	// Read TGA Header
+	uint8 TGAHeader[18];
+	memcpy(TGAHeader, Data, sizeof(TGAHeader));
+	// Get image dimensions from header
+	const int32 Width = TGAHeader[12] | (TGAHeader[13] << 8);
+	const int32 Height = TGAHeader[14] | (TGAHeader[15] << 8);
+
+	if (Width * Height > DataSize)
+	{
+		return {};
+	}
+
+	// Resize pixel array
+	Pixels.SetNumUninitialized(Width * Height);
+	// Read Pixels
+	uint32 Offset = sizeof(TGAHeader);
+	for (int32 i = 0; i < Width * Height; i++)
+	{
+		uint8 BGRA[4];
+		memcpy(BGRA, Data + Offset, sizeof(BGRA));
+		Offset += sizeof(BGRA);
+		// Convert from BGRA to RGBA
+		Pixels[i] = FColor(BGRA[2], BGRA[1], BGRA[0], BGRA[3]);
+	}
+
+	return Pixels;
+}
+
+static TArray<FColor> ReadTGAFromFile(const FString& FilePath)
+{
+	IFileHandle* FileHandle = FPlatformFileManager::Get().GetPlatformFile().OpenRead(*FilePath);
+	TArray<uint8_t> Data;
+	Data.SetNum(FileHandle->Size());
+	FileHandle->Read(Data.GetData(), Data.Num());
+	return ReadTGAFromMemory(Data.GetData(), Data.Num());
+}
+
+#if UE_VERSION_OLDER_THAN(5, 5, 0)
+BEGIN_DEFINE_SPEC(FMRUKDistanceMapSpec, TEXT("MR Utility Kit"), EAutomationTestFlags::ProductFilter | EAutomationTestFlags::ApplicationContextMask)
+#else
+BEGIN_DEFINE_SPEC(FMRUKDistanceMapSpec, TEXT("MR Utility Kit"), EAutomationTestFlags::ProductFilter | EAutomationTestFlags_ApplicationContextMask)
+#endif
+END_DEFINE_SPEC(FMRUKDistanceMapSpec)
+
+void FMRUKDistanceMapSpec::Define()
+{
+	Describe(TEXT("Distance map"), [this] {
+		BeforeEach([this]() {
+			// Load map
+			const auto ContentDir = FPaths::ProjectContentDir();
+			FAutomationEditorCommonUtils::LoadMap(ContentDir + "/Common/Maps/TestLevel.umap");
+			StartPIE(true);
+		});
+
+		BeforeEach(EAsyncExecution::ThreadPool, []() {
+			while (!GEditor->IsPlayingSessionInEditor())
+			{
+				// Wait until play session starts
+				FGenericPlatformProcess::Yield();
+			}
+		});
+
+		It(TEXT("Capture distance map"), [this] {
+			const auto World = GEditor->GetPIEWorldContext()->World();
+			const auto GameInstance = World->GetGameInstance();
+			UMRUKSubsystem* Subsystem = GameInstance->GetSubsystem<UMRUKSubsystem>();
+			Subsystem->LoadSceneFromJsonString(ExampleRoomJson);
+
+			// Create and setup distance map generator
+			const FActorSpawnParameters Params{};
+			AMRUKDistanceMapGenerator* DistanceMapGenerator = World->SpawnActor<AMRUKDistanceMapGenerator>(Params);
+			DistanceMapGenerator->SetActorLocation(FVector(0.0, 0.0, 200.0));
+			DistanceMapGenerator->SetActorRotation(FRotator::MakeFromEuler(FVector(0.0, -90.0, 0.0)));
+
+			UCanvasRenderTarget2D* RenderTarget = Cast<UCanvasRenderTarget2D>(DistanceMapGenerator->CaptureDistanceMap());
+			FTextureRenderTargetResource* RenderTargetResource = RenderTarget->GameThread_GetRenderTargetResource();
+			// Create an array to store the pixel data
+			TArray<FColor> PixelData;
+			// Read the pixel data from the Render Target
+			ENQUEUE_RENDER_COMMAND(ReadSurfaceCommand)
+			(
+				[RenderTargetResource, &PixelData](FRHICommandListImmediate& RHICmdList) {
+					const FTextureRHIRef Texture2DRHI = RenderTargetResource->GetRenderTargetTexture();
+					RHICmdList.ReadSurfaceData(
+						Texture2DRHI,
+						FIntRect(0, 0, Texture2DRHI->GetSizeX(), Texture2DRHI->GetSizeY()),
+						PixelData,
+						FReadSurfaceDataFlags());
+				});
+			// Wait for the rendering thread to finish executing the command
+			FlushRenderingCommands();
+
+			// Compare result
+
+			const TArray<FColor> ExpectedPixels = ReadTGAFromMemory(DistanceMapTestData, sizeof(DistanceMapTestData));
+
+			bool Success = true;
+			if (!TestEqual(TEXT("Pixel count matches"), PixelData.Num(), ExpectedPixels.Num()))
+			{
+				Success = false;
+			}
+			for (int32 I = 0; I < PixelData.Num() && Success; ++I)
+			{
+				if (!TestEqual(TEXT("R channel matches"), PixelData[I].R, ExpectedPixels[I].R))
+				{
+					Success = false;
+					break;
+				}
+				if (!TestEqual(TEXT("G channel matches"), PixelData[I].G, ExpectedPixels[I].G))
+				{
+					Success = false;
+					break;
+				}
+				if (!TestEqual(TEXT("B channel matches"), PixelData[I].B, ExpectedPixels[I].B))
+				{
+					Success = false;
+					break;
+				}
+				if (!TestEqual(TEXT("A channel matches"), PixelData[I].A, ExpectedPixels[I].A))
+				{
+					Success = false;
+					break;
+				}
+			}
+
+			if (!Success)
+			{
+				const FString& TestResultsPath = FPaths::Combine(FPaths::ProjectIntermediateDir(), "TestResults");
+
+				IPlatformFile& PlatformFile = FPlatformFileManager::Get().GetPlatformFile();
+				if (!PlatformFile.DirectoryExists(*TestResultsPath))
+				{
+					PlatformFile.CreateDirectory(*TestResultsPath);
+				}
+
+				const FString& ActualPixelsFilename = FPaths::CreateTempFilename(*TestResultsPath, TEXT("DistanceMapTest_ActualPixels"), TEXT(".tga"));
+				const FString& ExpectedPixelsFilename = FPaths::CreateTempFilename(*TestResultsPath, TEXT("DistanceMapTest_ExpectedPixels"), TEXT(".tga"));
+				// The resulting binary data can be converted to C array with the tool found here https://github.com/AntumDeluge/bin2header
+				WriteTGA(ActualPixelsFilename, PixelData, RenderTarget->SizeX, RenderTarget->SizeY);
+				WriteTGA(ExpectedPixelsFilename, PixelData, RenderTarget->SizeX, RenderTarget->SizeY);
+				UE_LOG(LogTemp, Warning, TEXT("Expected pixels have been saved as tga file in %s"), *ExpectedPixelsFilename);
+				UE_LOG(LogTemp, Warning, TEXT("Actual pixels have been saved as tga file in %s"), *ActualPixelsFilename);
+			}
+		});
+
+		// Caution: Order of these statements is important
+
+		AfterEach(EAsyncExecution::ThreadPool, []() {
+			while (GEditor->IsPlayingSessionInEditor())
+			{
+				// Wait until play session ends
+				FGenericPlatformProcess::Yield();
+			}
+		});
+
+		AfterEach([]() {
+			// Request end of play session
+			GUnrealEd->RequestEndPlayMap();
+		});
+	});
+}

Plugins/MetaXR/Source/MRUtilityKitEditor/Private/MRUtilityKitEditor.cpp

@@ -0,0 +1,35 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+
+#include "MRUtilityKitEditor.h"
+
+#include "MRUtilityKitGridSliceResizer.h"
+#include "MRUtilityKitGridSliceResizerVisualization.h"
+#include "MRUtilityKitTelemetry.h"
+#include "UnrealEdGlobals.h"
+#include "Editor/UnrealEdEngine.h"
+
+#define LOCTEXT_NAMESPACE "FMRUKEditorModule"
+
+DEFINE_LOG_CATEGORY(LogMRUKEditor);
+
+void FMRUKEditorModule::StartupModule()
+{
+	if (GUnrealEd)
+	{
+		const auto ResizerVisualizer = MakeShared<FMRUKGridSliceResizerVisualizer>();
+		GUnrealEd->RegisterComponentVisualizer(UMRUKGridSliceResizerComponent::StaticClass()->GetFName(), ResizerVisualizer);
+		ResizerVisualizer->OnRegister();
+	}
+}
+
+void FMRUKEditorModule::ShutdownModule()
+{
+	if (GUnrealEd)
+	{
+		GUnrealEd->UnregisterComponentVisualizer(UMRUKGridSliceResizerComponent::StaticClass()->GetFName());
+	}
+}
+
+#undef LOCTEXT_NAMESPACE
+
+IMPLEMENT_MODULE(FMRUKEditorModule, MRUtilityKitEditor)

Plugins/MetaXR/Source/MRUtilityKitEditor/Private/MRUtilityKitGeometry.spec.cpp

@@ -0,0 +1,165 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+
+#include "Editor/UnrealEdEngine.h"
+#include "Misc/AutomationTest.h"
+#include "Misc/EngineVersionComparison.h"
+#include "MRUtilityKitGeometry.h"
+#include "TestHelper.h"
+#include "Tests/AutomationEditorCommon.h"
+#include "UnrealEdGlobals.h"
+#include "Editor.h"
+
+namespace
+{
+	double CalculateTriangleArea(const FVector2D& P1, const FVector2D& P2, const FVector2D& P3)
+	{
+		return (P1.X * (P2.Y - P3.Y) + P2.X * (P3.Y - P1.Y) + P3.X * (P1.Y - P2.Y)) / 2.0f;
+	}
+
+	// Use the triangulated area as a proxy to ensure the triangulation worked as expected
+	double CalculateTriangulatedArea(const TArray<FVector2D>& Vertices, const TArray<int32>& Indices)
+	{
+		double Area = 0.0;
+		for (int i = 0; i < Indices.Num(); i += 3)
+		{
+			const FVector2D& P1 = Vertices[Indices[i]];
+			const FVector2D& P2 = Vertices[Indices[i + 1]];
+			const FVector2D& P3 = Vertices[Indices[i + 2]];
+			const double TriangleArea = CalculateTriangleArea(P1, P2, P3);
+			check(TriangleArea >= 0.0);
+			Area += TriangleArea;
+		}
+
+		return Area;
+	}
+} // namespace
+
+#if UE_VERSION_OLDER_THAN(5, 5, 0)
+BEGIN_DEFINE_SPEC(FMRUKGeometrySpec, TEXT("MR Utility Kit"), EAutomationTestFlags::ProductFilter | EAutomationTestFlags::ApplicationContextMask)
+#else
+BEGIN_DEFINE_SPEC(FMRUKGeometrySpec, TEXT("MR Utility Kit"), EAutomationTestFlags::ProductFilter | EAutomationTestFlags_ApplicationContextMask)
+#endif
+
+void SetupMRUKSubsystem();
+void TeardownMRUKSubsystem();
+END_DEFINE_SPEC(FMRUKGeometrySpec)
+
+void FMRUKGeometrySpec::SetupMRUKSubsystem()
+{
+	BeforeEach([this]() {
+		// Load map and start play in editor
+		const auto ContentDir = FPaths::ProjectContentDir();
+		FAutomationEditorCommonUtils::LoadMap(ContentDir + "/Common/Maps/TestLevel.umap");
+		StartPIE(true);
+	});
+
+	BeforeEach(EAsyncExecution::ThreadPool, []() {
+		while (!GEditor->IsPlayingSessionInEditor())
+		{
+			// Wait until play session starts
+			FGenericPlatformProcess::Yield();
+		}
+	});
+}
+
+void FMRUKGeometrySpec::TeardownMRUKSubsystem()
+{
+	// Caution: Order of these statements is important
+
+	AfterEach(EAsyncExecution::ThreadPool, []() {
+		while (GEditor->IsPlayingSessionInEditor())
+		{
+			// Wait until play session ends
+			FGenericPlatformProcess::Yield();
+		}
+	});
+
+	AfterEach([]() {
+		// Request end of play session
+		GUnrealEd->RequestEndPlayMap();
+	});
+}
+
+void FMRUKGeometrySpec::Define()
+{
+	Describe(TEXT("Triangulation"), [this] {
+		SetupMRUKSubsystem();
+
+		It(TEXT("Triangulate quad"), [this] {
+			const TArray<FVector2f> TestPolygon = { { 0.0f, 0.0f }, { 1.0f, 0.0f }, { 1.0f, 1.0f }, { 0.0f, 1.0f } };
+			TArray<FVector2D> Vertices;
+			TArray<int32> Indices;
+			MRUKTriangulatePolygon({ TestPolygon }, Vertices, Indices);
+			TestEqual(TEXT("Correct number of indices"), 6, Indices.Num());
+			TestEqual(TEXT("Correct area triangulated"), 1.0, CalculateTriangulatedArea(Vertices, Indices));
+		});
+
+		It(TEXT("Triangulate quad with hole"), [this] {
+			const TArray<TArray<FVector2f>> Polygons = { { { 0.0f, 0.0f }, { 2.0f, 0.0f }, { 2.0f, 2.0f }, { 0.0f, 2.0f } }, { { 0.5f, 0.5f }, { 0.5f, 1.5f }, { 1.5f, 1.5f }, { 1.5f, 0.5f } } };
+			TArray<FVector2D> Vertices;
+			TArray<int32> Indices;
+			MRUKTriangulatePolygon(Polygons, Vertices, Indices);
+
+			TestEqual(TEXT("Correct number of indices"), Indices.Num(), 24);
+			TestEqual(TEXT("Correct area triangulated"), CalculateTriangulatedArea(Vertices, Indices), 3.0);
+		});
+
+		It(TEXT("Triangulate quad with four holes"), [this] {
+			TArray<TArray<FVector2f>> Polygons = { { { 0.0f, 0.0f }, { 4.0f, 0.0f }, { 4.0f, 4.0f }, { 0.0f, 4.0f } } };
+			for (int32 I = 0; I < 4; ++I)
+			{
+				const FVector2f Offset(0.5 + 2.0 * (I / 2), 0.5 + 2.0 * (I % 2));
+				Polygons.Push({ Offset + FVector2f(0.0, 0.0), Offset + FVector2f(0.0, 1.0), Offset + FVector2f(1.0, 1.0), Offset + FVector2f(1.0, 0.0) });
+			}
+
+			TArray<FVector2D> Vertices;
+			TArray<int32> Indices;
+			MRUKTriangulatePolygon(Polygons, Vertices, Indices);
+
+			TestEqual(TEXT("Correct number of indices"), Indices.Num(), 66);
+			TestEqual(TEXT("Correct area triangulated"), CalculateTriangulatedArea(Vertices, Indices), 12.0);
+		});
+
+		It(TEXT("Triangulate quad with two close holes"), [this] {
+			const TArray<TArray<FVector2f>> Polygons = {
+				{
+					{ 101.985214, 113.8258 },
+					{ -101.985214, 113.8258 },
+					{ -101.985214, -113.8258 },
+					{ 101.985214, -113.8258 },
+				},
+				{ { 18.395055731633885, 9.0596833 }, { -72.518264268366110, 9.0596833 }, { -72.518264268366110, 67.2252527 }, { 18.395055731633885, 67.2252527 } },
+				{ { 18.395055731633885, -53.4203167 }, { -72.518264268366110, -53.4203167 }, { -72.518264268366110, 4.7452569 }, { 18.395055731633885, 4.7452569 } },
+			};
+
+			TArray<FVector2D> Vertices;
+			TArray<int32> Indices;
+			MRUKTriangulatePolygon(Polygons, Vertices, Indices);
+
+			TestEqual(TEXT("Correct number of indices"), Indices.Num(), 42);
+			TestEqual(TEXT("Correct area triangulated"), CalculateTriangulatedArea(Vertices, Indices), 35858.143857, 0.001);
+		});
+
+		It(TEXT("Triangulate LShape"), [this] {
+			const TArray<FVector2f> TestPolygon = { { 0.0, 0.0 }, { 2.0, 0.0 }, { 2.0, 2.0 }, { 1.0, 2.0 }, { 1.0, 1.0 }, { 0.0, 1.0 } };
+			TArray<FVector2D> Vertices;
+			TArray<int32> Indices;
+			MRUKTriangulatePolygon({ TestPolygon }, Vertices, Indices);
+
+			TestEqual(TEXT("Correct number of indices"), Indices.Num(), 12);
+			TestEqual(TEXT("Correct area triangulated"), CalculateTriangulatedArea(Vertices, Indices), 3.0);
+		});
+
+		It(TEXT("Triangulate CShape"), [this] {
+			const TArray<FVector2f> TestPolygon = { { 0.0, 0.0 }, { 2.0, 0.0 }, { 2.0, 1.0 }, { 1.0, 1.0 }, { 1.0, 2.0 }, { 2.0, 2.0 }, { 2.0, 3.0 }, { 0.0, 3.0 } };
+			TArray<FVector2D> Vertices;
+			TArray<int32> Indices;
+			MRUKTriangulatePolygon({ TestPolygon }, Vertices, Indices);
+
+			TestEqual(TEXT("Correct number of indices"), Indices.Num(), 18);
+			TestEqual(TEXT("Correct area triangulated"), CalculateTriangulatedArea(Vertices, Indices), 5.0);
+		});
+
+		TeardownMRUKSubsystem();
+	});
+}

Plugins/MetaXR/Source/MRUtilityKitEditor/Private/MRUtilityKitGridSliceResizer.spec.cpp

@@ -0,0 +1,194 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+
+#include "Editor/UnrealEdEngine.h"
+#include "Editor.h"
+#include "GridSliceResizerTestData.h"
+#include "MRUtilityKitGridSliceResizer.h"
+#include "Misc/AutomationTest.h"
+#include "Misc/EngineVersionComparison.h"
+#include "TestHelper.h"
+#include "Tests/AutomationEditorCommon.h"
+#include "UnrealEdGlobals.h"
+
+#if UE_VERSION_OLDER_THAN(5, 5, 0)
+BEGIN_DEFINE_SPEC(FMRUKGridSliceResizerSpec, TEXT("MR Utility Kit"), EAutomationTestFlags::ProductFilter | EAutomationTestFlags::ApplicationContextMask)
+#else
+BEGIN_DEFINE_SPEC(FMRUKGridSliceResizerSpec, TEXT("MR Utility Kit"), EAutomationTestFlags::ProductFilter | EAutomationTestFlags_ApplicationContextMask)
+#endif
+END_DEFINE_SPEC(FMRUKGridSliceResizerSpec)
+
+void FMRUKGridSliceResizerSpec::Define()
+{
+	Describe(TEXT("Grid Slice Resizer"), [this] {
+		BeforeEach([this]() {
+			// Load map
+			const auto ContentDir = FPaths::ProjectContentDir();
+			FAutomationEditorCommonUtils::LoadMap(ContentDir + "/Common/Maps/TestLevel.umap");
+			StartPIE(true);
+		});
+
+		BeforeEach(EAsyncExecution::ThreadPool, []() {
+			while (!GEditor->IsPlayingSessionInEditor())
+			{
+				// Wait until play session starts
+				FGenericPlatformProcess::Yield();
+			}
+		});
+
+		It(TEXT("Slice mesh"), [this] {
+			const auto World = GEditor->GetPIEWorldContext()->World();
+			const FActorSpawnParameters Params{};
+			AMeshResizer* Resizer = World->SpawnActor<AMeshResizer>(Params);
+
+			UMRUKGridSliceResizerComponent* ResizerComponent = Resizer->GridSliceResizerComponent;
+
+			struct FTestData
+			{
+				FVector Scale;
+				uint8 ScaleCenterMode;
+				double BorderXNegative;
+				double BorderXPositive;
+				double BorderYNegative;
+				double BorderYPositive;
+				double BorderZNegative;
+				double BorderZPositive;
+				FVector SlicerPivotOffset;
+				const TArray<FVector>& ExpectedPositions;
+			};
+
+			TArray TestDataContainer = {
+				// Test without pivot offset
+				FTestData{
+					FVector(2.0, 2.0, 2.0),
+					(uint8)EMRUKScaleCenterMode::XAxis | (uint8)EMRUKScaleCenterMode::YAxis | (uint8)EMRUKScaleCenterMode::ZAxis,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					FVector(0.0, 0.0, 0.0),
+					ExpectedPositionsPivotCenter,
+				},
+				// Test with pivot offset
+				FTestData{
+					FVector(2.0, 2.0, 2.0),
+					(uint8)EMRUKScaleCenterMode::XAxis | (uint8)EMRUKScaleCenterMode::YAxis | (uint8)EMRUKScaleCenterMode::ZAxis,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					FVector(0.0, 0.0, -40.0),
+					ExpectedPositionsPivotOffset,
+				},
+				// Test with pivot outside of bounding box
+				FTestData{
+					FVector(2.0, 2.0, 2.0),
+					(uint8)EMRUKScaleCenterMode::XAxis | (uint8)EMRUKScaleCenterMode::YAxis | (uint8)EMRUKScaleCenterMode::ZAxis,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					FVector(0.0, 0.0, -160.0),
+					ExpectedPositionsPivotOutside,
+				},
+				// Test scaled down with pivot offset
+				FTestData{
+					FVector(0.2, 0.2, 0.2),
+					(uint8)EMRUKScaleCenterMode::XAxis | (uint8)EMRUKScaleCenterMode::YAxis | (uint8)EMRUKScaleCenterMode::ZAxis,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					FVector(0.0, 0.0, 20.0),
+					ExpectedPositionsScaledDown,
+				},
+				// Test without center scale
+				FTestData{
+					FVector(2.0, 2.0, 2.0),
+					(uint8)EMRUKScaleCenterMode::None,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					FVector(0.0, 0.0, 0.0),
+					ExpectedPositionsCenterNotScaled,
+				},
+				// Test without center scale but scaled down
+				FTestData{
+					FVector(0.2, 0.2, 0.2),
+					(uint8)EMRUKScaleCenterMode::None,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					0.8,
+					FVector(0.0, 0.0, 0.0),
+					ExpectedPositionsScaledDownCenterNotScaled,
+				}
+			};
+
+			constexpr double Tolerance = 0.001;
+
+			for (const FTestData& TestData : TestDataContainer)
+			{
+				ResizerComponent->ScaleCenterMode = TestData.ScaleCenterMode;
+				ResizerComponent->BorderXNegative = TestData.BorderXNegative;
+				ResizerComponent->BorderXPositive = TestData.BorderXPositive;
+				ResizerComponent->BorderYNegative = TestData.BorderYNegative;
+				ResizerComponent->BorderYPositive = TestData.BorderYPositive;
+				ResizerComponent->BorderZNegative = TestData.BorderZNegative;
+				ResizerComponent->BorderZPositive = TestData.BorderZPositive;
+				ResizerComponent->SlicerPivotOffset = TestData.SlicerPivotOffset;
+
+				Resizer->SetActorScale3D(TestData.Scale);
+				Resizer->GridSliceResizerComponent->SliceMesh();
+
+				const FProcMeshSection* MeshSection = Resizer->GridSliceResizerComponent->ProcMesh->GetProcMeshSection(0);
+				if (!TestNotNull(TEXT("Mesh section is not null"), MeshSection))
+				{
+					return;
+				}
+
+				const TArray<uint32>& Indices = MeshSection->ProcIndexBuffer;
+				const TArray<FProcMeshVertex>& Vertices = MeshSection->ProcVertexBuffer;
+
+				TestEqual(TEXT("Triangles count matches"), Indices.Num(), ExpectedTriangles.Num());
+				for (int32 I = 0; I < Indices.Num(); ++I)
+				{
+					TestEqual(TEXT("Index matches"), Indices[I], ExpectedTriangles[I]);
+				}
+
+				TestEqual(TEXT("Positions count matches"), Vertices.Num(), TestData.ExpectedPositions.Num());
+				for (int32 I = 0; I < Vertices.Num(); ++I)
+				{
+					TestEqual(TEXT("Position matches"), Vertices[I].Position, TestData.ExpectedPositions[I], Tolerance);
+				}
+			}
+		});
+
+		// Caution: Order of these statements is important
+
+		AfterEach(EAsyncExecution::ThreadPool, []() {
+			while (GEditor->IsPlayingSessionInEditor())
+			{
+				// Wait until play session ends
+				FGenericPlatformProcess::Yield();
+			}
+		});
+
+		AfterEach([]() {
+			// Request end of play session
+			GUnrealEd->RequestEndPlayMap();
+		});
+	});
+}

Plugins/MetaXR/Source/MRUtilityKitEditor/Private/MRUtilityKitGridSliceResizerVisualization.cpp

@@ -0,0 +1,106 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+
+#include "MRUtilityKitGridSliceResizerVisualization.h"
+
+#include "MRUtilityKitGridSliceResizer.h"
+#include "ProceduralMeshComponent.h"
+#include "SceneManagement.h"
+
+namespace
+{
+	void DrawSliceBorder(FPrimitiveDrawInterface* PDI, FVector Scale, FVector Pivot, FVector ScaledPivot, const UProceduralMeshComponent* ProcMesh, const FVector& Size, double BorderPos, double BorderNeg, int32 Axis)
+	{
+		// Scaled bounding box of the mesh that gets displayed
+		FBox BBox = ProcMesh->GetLocalBounds().GetBox();
+		BBox.Min *= Scale;
+		BBox.Max *= Scale;
+
+		const FVector InvSize = FVector(1.0, 1.0, 1.0) / Scale;
+		// Unscaled bounding box
+		const FBox BBoxOriginal = FBox(BBox.Min * InvSize, BBox.Max * InvSize);
+
+		double Positive = BBox.Max[Axis] - (BBoxOriginal.Max[Axis] - (FMath::Abs(BBoxOriginal.Max[Axis] - Pivot[Axis]) * BorderPos + Pivot[Axis]));
+		if (Positive + Pivot[Axis] < 0.0)
+		{
+			// Clamp to the bounding box in case the bounding box is smaller than the stubs
+			Positive = BBox.Max[Axis];
+		}
+		if (Pivot[Axis] > BBox.Max[Axis])
+		{
+			// Clamp to the pivot if the pivot is outside of the bounding box
+			Positive = FMath::Min(ScaledPivot[Axis], Positive);
+		}
+
+		double Negative = BBox.Min[Axis] - (BBoxOriginal.Min[Axis] - (-FMath::Abs(BBoxOriginal.Min[Axis] - Pivot[Axis]) * BorderNeg + Pivot[Axis]));
+		if (Negative - Pivot[Axis] > 0.0)
+		{
+			// Clamp to the bounding box in case the bounding box is smaller than the stubs
+			Negative = BBox.Min[Axis];
+		}
+		if (Pivot[Axis] < BBox.Min[Axis])
+		{
+			// Clamp to the pivot if the pivot is outside of the bounding box
+			Negative = FMath::Max(ScaledPivot[Axis], Negative);
+		}
+
+		double PosNeg[2] = { Positive, Negative };
+		for (int32 J = 0; J < 2; ++J)
+		{
+			FVector Max;
+			FVector Min;
+			for (int32 I = 0; I < 3; ++I)
+			{
+				if (I == Axis)
+				{
+					Min[I] = PosNeg[J];
+					Max[I] = PosNeg[J];
+				}
+				else
+				{
+					Min[I] = BBox.Min[I];
+					Max[I] = BBox.Max[I];
+				}
+			}
+
+			// TODO: Fix visualization for in editor playing. Meaning applying the world transform.
+			const FBox Box(Min, Max);
+			DrawWireBox(PDI, Box, FLinearColor(1.0f, 0.0f, 0.0f), SDPG_Foreground, 0.2f);
+		}
+	}
+} // namespace
+
+void FMRUKGridSliceResizerVisualizer::DrawVisualization(const UActorComponent* Component, const FSceneView* View, FPrimitiveDrawInterface* PDI)
+{
+	const UMRUKGridSliceResizerComponent* Resizer = Cast<const UMRUKGridSliceResizerComponent>(Component);
+	if (!Resizer || !Resizer->GetOwner())
+	{
+		return;
+	}
+
+	const FVector Size = Resizer->GetOwner()->GetActorScale();
+	const FVector Location = Resizer->GetComponentLocation();
+	const FVector Pivot = Location + Resizer->SlicerPivotOffset;
+	const FVector ScaledPivot = Location + Resizer->SlicerPivotOffset * Size;
+
+	if (Resizer->bDebugDrawPivot)
+	{
+		// Draw pivot
+		DrawWireSphere(PDI, ScaledPivot, FLinearColor(0.0f, 1.0f, 1.0f), 2.0, 16, SDPG_Foreground, 0.5f);
+	}
+
+	if (const auto ProcMesh = Resizer->GetOwner()->GetComponentByClass<UProceduralMeshComponent>())
+	{
+		if (Resizer->bDebugDrawBorderX)
+		{
+			DrawSliceBorder(PDI, Size, Pivot, ScaledPivot, ProcMesh, Size, Resizer->BorderXPositive, Resizer->BorderXNegative, 0);
+		}
+		if (Resizer->bDebugDrawBorderY)
+		{
+			DrawSliceBorder(PDI, Size, Pivot, ScaledPivot, ProcMesh, Size, Resizer->BorderYPositive, Resizer->BorderYNegative, 1);
+		}
+		if (Resizer->bDebugDrawBorderZ)
+		{
+			DrawSliceBorder(PDI, Size, Pivot, ScaledPivot, ProcMesh, Size, Resizer->BorderZPositive, Resizer->BorderZNegative, 2);
+		}
+	}
+}

Plugins/MetaXR/Source/MRUtilityKitEditor/Private/MeshActor.cpp

@@ -0,0 +1,17 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+
+#include "MeshActor.h"
+#include "UObject/ConstructorHelpers.h"
+#include "Components/StaticMeshComponent.h"
+#include "Engine/StaticMesh.h"
+
+AMeshActor::AMeshActor()
+{
+	static ConstructorHelpers::FObjectFinder<UStaticMesh> CubeFinder(TEXT("StaticMesh'/Engine/BasicShapes/Cube.Cube'"));
+	Mesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("Mesh"));
+	if (CubeFinder.Succeeded())
+	{
+		Mesh->SetStaticMesh(CubeFinder.Object);
+	}
+	SetRootComponent(Mesh);
+}

Plugins/MetaXR/Source/MRUtilityKitEditor/Private/MeshActor.h

@@ -0,0 +1,18 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+
+#pragma once
+
+#include "GameFramework/Actor.h"
+#include "MeshActor.generated.h"
+
+UCLASS()
+class AMeshActor : public AActor
+{
+	GENERATED_BODY()
+
+public:
+	UStaticMeshComponent* Mesh;
+
+public:
+	AMeshActor();
+};

Plugins/MetaXR/Source/MRUtilityKitEditor/Private/TestHelper.h

@@ -0,0 +1,64 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+
+#pragma once
+
+#include "GameFramework/Actor.h"
+#include "MRUtilityKitAnchor.h"
+#include "MRUtilityKitGridSliceResizer.h"
+#include "TestHelper.generated.h"
+
+bool StartPIE(bool bSimulateInEditor);
+
+UCLASS()
+class URoomAndAnchorObserver : public UObject
+{
+	GENERATED_BODY()
+
+public:
+	UPROPERTY()
+	TArray<AMRUKAnchor*> AnchorsCreated;
+	UPROPERTY()
+	TArray<AMRUKAnchor*> AnchorsUpdated;
+	UPROPERTY()
+	TArray<AMRUKAnchor*> AnchorsRemoved;
+
+	UPROPERTY()
+	TArray<AMRUKRoom*> RoomsCreated;
+	UPROPERTY()
+	TArray<AMRUKRoom*> RoomsUpdated;
+	UPROPERTY()
+	TArray<AMRUKRoom*> RoomsRemoved;
+
+	UFUNCTION()
+	void OnAnchorCreated(AMRUKAnchor* Anchor);
+	UFUNCTION()
+	void OnAnchorUpdated(AMRUKAnchor* Anchor);
+	UFUNCTION()
+	void OnAnchorRemoved(AMRUKAnchor* Anchor);
+	UFUNCTION()
+	void OnRoomCreated(AMRUKRoom* Room);
+	UFUNCTION()
+	void OnRoomUpdated(AMRUKRoom* Room);
+	UFUNCTION()
+	void OnRoomRemoved(AMRUKRoom* Room);
+
+	void Clear();
+};
+
+extern const TCHAR* ExampleRoomJson;
+extern const TCHAR* ExampleRoomFurnitureAddedJson;
+extern const TCHAR* ExampleRoomMoreFurnitureAddedJson;
+extern const TCHAR* ExampleRoomFurnitureModifiedJson;
+extern const TCHAR* ExampleOtherRoomJson;
+
+UCLASS()
+class AMeshResizer : public AActor
+{
+	GENERATED_BODY()
+
+public:
+	UPROPERTY()
+	UMRUKGridSliceResizerComponent* GridSliceResizerComponent;
+
+	AMeshResizer();
+};

Plugins/MetaXR/Source/MRUtilityKitEditor/Public/MRUtilityKitEditor.h

@@ -0,0 +1,15 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+
+#pragma once
+
+#include "Modules/ModuleManager.h"
+
+DECLARE_LOG_CATEGORY_EXTERN(LogMRUKEditor, Log, All);
+
+class FMRUKEditorModule : public IModuleInterface
+{
+public:
+	/** IModuleInterface implementation */
+	virtual void StartupModule() override;
+	virtual void ShutdownModule() override;
+};

Plugins/MetaXR/Source/MRUtilityKitEditor/Public/MRUtilityKitGridSliceResizerVisualization.h

@@ -0,0 +1,11 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+
+#pragma once
+
+#include "ComponentVisualizer.h"
+
+class MRUTILITYKITEDITOR_API FMRUKGridSliceResizerVisualizer : public FComponentVisualizer
+{
+private:
+	virtual void DrawVisualization(const UActorComponent* Component, const FSceneView* View, FPrimitiveDrawInterface* PDI) override;
+};