WEBVTT

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Hello, I am a programmer of 17 years

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and have been a full time professor of NEOWIZ Games

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and currently working in KRAFTON, Juhwan Kim

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Now, I will start Unreal C++ basics lecture

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The objective of this lecture is

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gaining basic knowledge

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to using Unreal Engine C++ for programming

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And I will also give some basic explanation about Unreal Engine

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There will be 4 lectures

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and on the first lecture

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as the basic grammars of C++

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we will learn installing Visual Studio and Unreal Engine

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their settings

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creating projects for coding

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and actors

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and outputting logs using Unreal Log

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Second lecture

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will contain basic C++ grammars including

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variables, functions, conditionals, iterations, and expressions

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In the third lecture

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we will learn what's left in C++ like

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array, pointer, reference, class, object-oriented programming, and polymorphism

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On the fourth lecture

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we'll recap on C++'s inheritance structure based on what we've learned

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and learn about Unreal's reflection system

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represented with U Property and U function

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Lastly, we will briefly recap on

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actor's life cycle which is the object that you will

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get to use the most and most generally in Unreal

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Installing Unreal Engine and Visual Studio

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Then, I will start

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the first lecture, C++ basics

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On this lecture, we will install Visual Studio of Microsfot

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and learn about it

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and install Unreal Engine

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and learn about it linking it to Visual Studio

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The lecture will be based on UE5

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and Unreal Engine is, as you might know

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an AAA engine usually for making games by Epic Games

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It would be good if you have Unreal Engine installed

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but if you don't

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go to the URL in the screen

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and let's install Unreal Engine

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First, go to Unreal Engine website

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through the URL I just showed you

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You will see this Unreal Engine download page

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I'm not sure what the latest version would look like

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but usually, once you go to their website

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there will be a download button on the left corner

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you can click that to download it from web

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This is the Unreal Engine download page

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and when you click on the blue button on the left

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the download will begin

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Before downloading, if you have an Epic account, you can log in

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and if not

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you can sign in and log in

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You can also log in using

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other accounts like Google or Apple

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Log in and install the exe file

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and once it;s done

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a launcher that will

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run Unreal Engine will start running

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and the launcher's screen looks like this

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Here, go to Unreal Engine

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and on the library tab

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Unreal Engine won't be installed like this

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Then once you install Unreal Engine

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comparing the two screens

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this screen shows when Unreal Engine isn't installed

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and this shows when it is

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The run button on the right top corner

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let's you know what version of Unreal Engine is installed

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This screen shows where Unreal Engine 5.3.2 is installed

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and the library shows a run button with Unreal Engine 5.3.2

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You can have various versions of Unreal Engine installed

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and in that case

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several ones of the the run button in the middle

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with a U mark will show

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The projects in the bottom

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won't show up when you first download it

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but once you create projects

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it will show a list of your projects

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with a screenshot

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If you installed Unreal Engine

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the editor that can edit C++

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is called IDE

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which is Integrated Development Environment

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You have to install Visual Studio 2022

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of Microsoft

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For Visual Studio of Microsoft as well

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go to the Microsoft website

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which you can follow the URL shown

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you'll see the download tab for Microsoft's

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Visual Studio Community

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Click on the download button on the bottom left corner

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and the installer for Visual Studio will be installed

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Visual Studio Installer looks like this

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Now, Visual Studio 2022 is already installed

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so it says that it's available for use

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but if you don't have it installed

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nothing will show up there

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and you can install Visual Studio 2022

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When you click on the install button, this screen will show

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and just check on the

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Unreal development mark

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game development using C++

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and click on the install button on the bottom right

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then it will start installing

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The time it takes to install it will differ from computer types and internet circumstances

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but it will usually take from 20 to 40 minutes

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Once you've installed Visual Studio

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assuming that it's the 2022 Community version

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Visual Studio will automatically start

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and this screen will show

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It says Visual Studio 2022 open recent files

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and the menu on the right

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is the menu that you can use to make projects

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on Visual Studio

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and on the left, when you create a project

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the recent files and projects will show there

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Now there's nothing

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so you can click the create new project on the right

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to create a new project with Visual Studio

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Again

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installing Visual Studio 2022

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takes the steps of going to the Microsoft website

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clicking on download to download Visual Studio Installer

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and once you run that

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it will show a Visual Studio 2022 install menu

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and with that, you can install Visual Studio

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You will need to check on the

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box for Unreal Engine in the process

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Generating actor and outputting log

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Then let's learn about

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creating a C++ project with Unreal Engine

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Once you run the Unreal Engine launcher that you just installed

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you'll see this screen

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When you click on the run button on the top right

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or the run for this version in the center

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this project setting screen will show up

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On the left of it

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it says recent projects

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Those are the projects recently created

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There are games, films, videos, architecture, automotive

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but we will select games tab

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and templates will come up in the middle

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Templates are pre-made basic settings

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but we'll select blank

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and it will show an empty tiled floor on the right

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which is a screen for creating a new empty project

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Under that there are blueprint and C++

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click on C++

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and you may leave other settings as is

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If you check on the starter contents the basic contents will be included

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so you just need to click on that and then create

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On the bottom it says project name

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which is just my project

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You can choose the name for your game or project

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Let's just keep it as is for now

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Once you click on the create button

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after a while

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Unreal project will be opened through Unreal editor

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On this Unreal editor screen

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we have world view on the left

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and world outliner in the middle

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and details on the right

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Now let's create a project in this Unreal editor

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I will tell you in two steps

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First, making an actor and writing the C++ code

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and the second is outputting a Hello world log in the log tab

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There are various ways to create an actor

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but we'll use C++

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so from the top menu

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select create C++ class

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Once you do that, this screen will show

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You can select what class to create when making a C++ class

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now, we'll create an actor

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You can see character, phone, actor

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but first, we'll go for an actor

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You can name your actor

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and keep the public/private as is

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Just give it a name and when you click on create class

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actor.header file and actor.cpp will be generated

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It might vary per settings

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but Visual Studio might start being linked

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and show this screen which is

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a log file during compiling

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called live coding in the Unreal screen

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Let's say that Visual Studio did start

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and try outputting log

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If the installation was done properly

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as soon as you created the actor

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Visual Studio will start and show this screen

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If this source screen doesn't show up

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you can select the file on the solution explorer on the left

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If the Visual Studio tab doesn't automatically pop up

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find the MyActor.c++ file that you just created

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from the content browser on the bottom center

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and double click on it which will open Visual Studio

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These are the MyActor files

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and there are two, header and cpp

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First, go to the cpp file

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which has the actions the actor will do

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and on the 25th line, under supertick function

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we'll write a code

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We didn't learn C++ yet

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so to give a brief explanation

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tick of MyActor is

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a code that is practiced every period, for every tick

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So we'll write a log there

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and have messages be output every tick, for every updated frame

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Type the following on the 25th line

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UE_LOG(

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LogTemp, Warning, TEXT ("Hello World!")); just as written on the screen

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To explain this code briefly

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when you develop a game you need to do logging

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which is leaving records of if a function

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is running well or not

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and stuff like debug messages

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In this case, to see if the code is written properly and to test

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we'll put the string of 'hello world' in

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Usually if you go to Unreal editor, it will be automatically compiled

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but you might do it manually

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If you press Ctrl + Alt + f11 in Unreal editor

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the code will be compiled like this

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and Unreal Engine will be updated

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Once the compiling is done

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you can go back to Unreal editor

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and as I told you when doing the double click

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drag the C++ class in the content browser

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under the world outliner in the middle

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into the view which is

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the 3D screen with tiles

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Once you do that

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it looks like nothing has been added in the world screen

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It doesn't show up

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because there are no content for the actor

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like physical mesh or renderer

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but in the world outliner in the middle

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you'll see that my actor has been added

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If my actor is properly added to world outliner

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you can click on the green play button on the top

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and Unreal editor will run a game project with an actor

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Now, there's nothing that we've created

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so we can only move the camera

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but through the code that we made

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on the bottom left

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there are 'hello world' logs

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I explained creating an Unreal project

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Follow this example step by step

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and the objective is installing Unreal Engine

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and Visual Studio

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and outputting messages on the Unreal Engine editor log tab

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So as you saw

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if the yellow 'hello world' is output on the bottom left

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you've succeeded in writing

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a very basic C++ project with Unreal

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Let me tell you about the following lectures

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To program with Unreal

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You wrote a log just now

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but to program using C++ with Unreal

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you need to know C++ well

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So starting from variables for data

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I will explain C++, an object-oriented

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program briefly

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C++ is a very complicated and big language

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that would take about a year

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in academies or colleges

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but I'll have only what's needed

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for Unreal programming

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Let's wrap up what we've learned in this lecture

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First, we installed Unreal Engine 5 from its website

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and Visual Studio 2022 Community as well

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We created a C++ project

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and wrote a C++ code to output 'hello world' log

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Thank you for listening

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Installing Unreal Engine and Visual Studio
Unreal Engine downloading link
https://www.unrealengine.com/ko

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Visual Studio downloading link
https://visualstudio.microsoft.com/ko/vs/community/

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Creating actor and outputting log
Creating projects
Select Actor from New C++ Class and write a name and click Create Class

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Appears linked to Visual Studio tab

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Outputting 'Hello World' log
Write UE_LOG(LogTemp, Warning, TEXT("Hello World!")) under Tick function

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After compiling, click and drag MyActor from Content Browser to scene
Check string being output on Output Log tab

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The End