1

Вывод:
1>------ Сборка начата: проект: UE4, Конфигурация: BuiltWithUnrealBuildTool Win32 ------
2>------ Сборка начата: проект: MyProject, Конфигурация: Development_Editor x64 ------
2>Compiling game modules for hot reload
2>Parsing headers for MyProjectEditor
2>  Running UnrealHeaderTool "C:\Users\Tom\Documents\Unreal Projects\MyProject\MyProject.uproject" "C:\Users\Tom\Documents\Unreal Projects\MyProject\Intermediate\Build\Win64\MyProjectEditor\Development\MyProjectEditor.uhtmanifest" -LogCmds="loginit warning, logexit warning, logdatabase error" -Unattended -WarningsAsErrors -installed
2>C:/Users/Tom/Documents/Unreal Projects/MyProject/Source/MyProject/MyBlueprintFunctionLibrary.h(26): error : Missing ')' in parameter list
2>EXEC : error : UnrealHeaderTool failed for target 'MyProjectEditor' (platform: Win64, module info: C:\Users\Tom\Documents\Unreal Projects\MyProject\Intermediate\Build\Win64\MyProjectEditor\Development\MyProjectEditor.uhtmanifest, exit code: OtherCompilationError (5)).
2>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.MakeFile.Targets(44,5): error MSB3075: команда ""C:\Program Files\Epic Games\UE_4.16\Engine\Build\BatchFiles\Build.bat" MyProjectEditor Win64 Development "C:\Users\Tom\Documents\Unreal Projects\MyProject\MyProject.uproject" -waitmutex" завершила работу с кодом 5. Убедитесь в наличии достаточных прав для выполнения этой команды.
2>Сборка проекта "MyProject.vcxproj" завершена с ошибкой.
========== Сборка: успешно: 1, с ошибками: 1, без изменений: 0, пропущено: 0 ==========
.сpp
// Fill out your copyright notice in the Description page of Project Settings.

#include "MyBlueprintFunctionLibrary.h"
#include "FileHelper.h"
#include "Paths.h"
#include "Json.h"
#include "Vector.h"
#include "Array.h"

bool UMyBlueprintFunctionLibrary::FileSaveString(FString SaveTextB, FString FileNameB)
{
    return FFileHelper::SaveStringToFile(SaveTextB, *(FPaths::GameDir() + FileNameB));
}

bool UMyBlueprintFunctionLibrary::FileLoadString(FString FileNameA, FString& SaveTextA)
{
    return FFileHelper::LoadFileToString(SaveTextA, *(FPaths::GameDir() + FileNameA));
}



//первая нода: получаем строку из файла
void UMyBlueprintFunctionLibrary::StringFromFile(FString FileNameA, FString &SaveString)
{
    FFileHelper::LoadFileToString(SaveString, *(FPaths::GameDir() + FileNameA));
}

//вторая нода: распарсиваем строку
//вершины
void UMyBlueprintFunctionLibrary::VertexParsing(FString JsonString, TArray<FVector> &ArrayVertexСoordinates)
{
    TSharedPtr<FJsonObject> JsonParsed = MakeShareable(new FJsonObject());;
    TSharedRef<TJsonReader<TCHAR>> JsonReader = TJsonReaderFactory<TCHAR>::Create(JsonString);
    //TArray<FVector> ArrayVertexСoordinates;

    //дальше распарсиваем
    if (FJsonSerializer::Deserialize(JsonReader, JsonParsed) && JsonParsed.IsValid()) {
        TArray<TSharedPtr<FJsonValue>> objArray = JsonParsed->GetArrayField("vertex");
        for (int32 i = 0; i < objArray.Num(); ++i) {

            TSharedPtr<FJsonObject> temp = objArray[i]->AsObject();
            //FString id = temp->GetStringField("id");
            //FString color = temp->GetStringField("color");
            int32 x = temp->GetIntegerField("x");
            int32 y = temp->GetIntegerField("y");
            int32 z = temp->GetIntegerField("z");

            //помещаем координаты в вектор, а вектор в массив
            FVector VectorVertexСoordinates;
            VectorVertexСoordinates.X = static_cast<float>(x);
            VectorVertexСoordinates.Y = static_cast<float>(y);
            VectorVertexСoordinates.Z = static_cast<float>(z);
            ArrayVertexСoordinates.AddUnique(VectorVertexСoordinates);
        }
    }
}

//ребра
void UMyBlueprintFunctionLibrary::EdgesParsing(FString JsonString, TArray<FVector> &ArraySourceСoordinates, TArray<FVector> &ArrayTargetСoordinates)
{
    TSharedPtr<FJsonObject> JsonParsed = MakeShareable(new FJsonObject());;
    TSharedRef<TJsonReader<TCHAR>> JsonReader = TJsonReaderFactory<TCHAR>::Create(JsonString);

    if (FJsonSerializer::Deserialize(JsonReader, JsonParsed) && JsonParsed.IsValid()) {
        TArray<TSharedPtr<FJsonValue>> objArray = JsonParsed->GetArrayField("edges");
        for (int32 i = 0; i < objArray.Num(); ++i) {

            TSharedPtr<FJsonObject> temp = objArray[i]->AsObject();
            TSharedPtr<FJsonObject> objSource = temp->GetObjectField("id1");
            TSharedPtr<FJsonObject> objTarget = temp->GetObjectField("id2");
            //FString color = temp->GetStringField("color");

            int32 x_source = objSource->GetIntegerField("x");
            int32 y_source = objSource->GetIntegerField("y");
            int32 z_source = objSource->GetIntegerField("z");

            int32 x_target = objTarget->GetIntegerField("x");
            int32 y_target = objTarget->GetIntegerField("y");
            int32 z_target = objTarget->GetIntegerField("z");

            FVector VectorSourceСoordinates;
            FVector VectorTargetСoordinates;

            VectorSourceСoordinates.X = static_cast<float>(x_source);
            VectorSourceСoordinates.Y = static_cast<float>(y_source);
            VectorSourceСoordinates.Z = static_cast<float>(z_source);

            VectorTargetСoordinates.X = static_cast<float>(x_target);
            VectorTargetСoordinates.Y = static_cast<float>(y_target);
            VectorTargetСoordinates.Z = static_cast<float>(z_target);

            ArraySourceСoordinates.Emplace(VectorSourceСoordinates);
            ArrayTargetСoordinates.Emplace(VectorTargetСoordinates);
        }
    }
}
.h
// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "MyBlueprintFunctionLibrary.generated.h"

/**
 *
 */
UCLASS()
class MYPROJECT_API UMyBlueprintFunctionLibrary : public UBlueprintFunctionLibrary
{
    GENERATED_BODY()
        UFUNCTION(BlueprintCallable, Category = "save")
        static bool FileSaveString(FString SaveTextB, FString FileNameB);

    UFUNCTION(BlueprintPure, Category = "save")
        static bool FileLoadString(FString FileNameA, FString& SaveTextA);

    UFUNCTION(BlueprintCallable, Category = "save")
        static void StringFromFile(FString FileNameA, FString& SaveString);

    UFUNCTION(BlueprintCallable, Category = "save")
        static void VertexParsing(FString JsonString, TArray<FVector>& ArrayVertexСoordinates);

    UFUNCTION(BlueprintCallable, Category = "save")
        static void EdgesParsing(FString JsonString, TArray<FVector>& ArraySourceСoordinates, TArray<FVector>& ArrayTargetСoordinates);

};