Whiteboard update

Config/DefaultEngine.ini

@@ -235,3 +235,6 @@ bExplicitCanvasChildZOrder=True
 [/Script/Engine.PhysicsSettings]
 bSupportUVFromHitResults=True
 
+[/Script/Engine.NetworkSettings]
+net.MaxRepArraySize=65535
+

Source/VRClassroom/TextureCopier.cpp

+// Fill out your copyright notice in the Description page of Project Settings.
+
+
+#include "TextureCopier.h"
+
+UTextureCopier::UTextureCopier()
+{
+}
+
+UTextureCopier::~UTextureCopier()
+{
+}
+
+TArray<FColor> UTextureCopier::GetPixelsData(UTextureRenderTarget2D* source) {
+	TArray<FColor> SurfData; 
+	FRenderTarget* RenderTarget = source->GameThread_GetRenderTargetResource();
+	RenderTarget->ReadPixels(SurfData);
+
+	return SurfData;
+}
+
+UTexture2D* UTextureCopier::CopyToTexture(const int32 sizeX, const int32 sizeY, const bool srgb, TArray<FColor> pixelsData) {
+	UTexture2D* Texture = UTexture2D::CreateTransient(sizeX, sizeY, PF_B8G8R8A8);
+#if WITH_EDITORONLY_DATA
+	Texture->MipGenSettings = TMGS_NoMipmaps;
+#endif
+	Texture->SRGB = srgb;
+
+	void* TextureData = Texture->PlatformData->Mips[0].BulkData.Lock(LOCK_READ_WRITE);
+	const int32 TextureDataSize = pixelsData.Num() * 4;
+	FMemory::Memcpy(TextureData, pixelsData.GetData(), TextureDataSize);
+	Texture->PlatformData->Mips[0].BulkData.Unlock();
+
+	Texture->UpdateResource();
+
+	return Texture;
+}
+
+int32 UTextureCopier::CalculateNumOfSubArrays(const int32 arraySize) {
+	return (arraySize - 1) / N + 1;
+}
+
+TArray<FColor> UTextureCopier::GetSubArray(const TArray<FColor> colorArray, const int32 arraySize, const int32 chunkNum) {
+	int32 start = chunkNum * N;
+	int32 end = chunkNum * N + N;
+
+	subArray.Empty();
+
+	int32 size = N;
+
+	if (end > arraySize) {
+		end = arraySize - 1;
+		size = arraySize - chunkNum * N;
+	}
+
+	for (int i = 0; i < size; i++) {
+		subArray.Add(colorArray[start + i]);
+	}
+
+	return subArray;
+}
\ No newline at end of file

Source/VRClassroom/TextureCopier.h

+// Fill out your copyright notice in the Description page of Project Settings.
+
+#pragma once
+
+#include <memory>
+#include "Engine/Texture2D.h"
+#include "Engine/TextureRenderTarget2D.h"
+#include "TextureCopier.generated.h"
+
+/**
+ * 
+ */
+UCLASS(Blueprintable, BlueprintType)
+class UTextureCopier : public UObject
+{
+	GENERATED_BODY()
+
+public:
+	UTextureCopier();
+	~UTextureCopier();
+
+	UFUNCTION(BlueprintCallable)
+		TArray<FColor> GetPixelsData(UTextureRenderTarget2D* source);
+
+	UFUNCTION(BlueprintCallable)
+		UTexture2D* CopyToTexture(const int32 sizeX, const int32 sizeY, const bool srgb, TArray<FColor> pixelsData);
+
+	UFUNCTION(BlueprintCallable)
+		int32 CalculateNumOfSubArrays(const int32 arraySize);
+
+	UFUNCTION(BlueprintCallable)
+		TArray<FColor> GetSubArray(const TArray<FColor> colorArray, const int32 arraySize, const int32 chunkNum);
+		//FColor[] GetSubArray(const FColor[] colorArray, const int32 arraySize, const int32 chunkNum);
+
+private:
+	int32 N = 65535;
+	TArray<FColor> subArray;
+};