Book Image

Unreal Development Kit Game Programming with UnrealScript: Beginner's Guide

By : Rachel Cordone
Book Image

Unreal Development Kit Game Programming with UnrealScript: Beginner's Guide

By: Rachel Cordone

Overview of this book

Unreal Development Kit is the free edition of Unreal Engine—the largest game engine in existence with hundreds of shipped commercial titles. The Unreal Engine is a very powerful tool for game development but with something so complex it's hard to know where to start.This book will teach you how to use the UnrealScript language to create your own games with the Unreal Development Kit by using an example game that you can create and play for yourself. It breaks down the UnrealScript language into easy to follow chapters that will quickly bring you up to speed with UnrealScript game programming.Unreal Development Kit Game Programming with UnrealScript takes you through the UnrealScript language for the Unreal Development Kit. It starts by walking through a project setup and setting up programs to write and browse code. It then takes you through using variables, functions, and custom classes to alter the game's behavior and create our own functionality. The use and creation of Kismet is also covered. Later, using replication to create and test multiplayer games is discussed. The book closes with code optimization and error handling as well as a few of the less common but useful features of UnrealScript.
Table of Contents (18 chapters)
Unreal Development Kit Game Programming with UnrealScript
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Time for action – I'd like to return this please


To have a function that uses a return value, first we need to tell the code what type of variable it's going to return.

  1. If we still have DoSomething in our AwesomeEnemySpawner class, delete that function. We'll make a new one called CanHasCheeseburger with a Boolean for a return value:

    function bool CanHasCheeseburger()
    {
        return true;
    }

    The return type is declared after function and before the function name.

  2. Now let's call our function from PostBeginPlay. There are two different ways we can use the function. The first would be to create a variable and let the function assign a value to it:

    function PostBeginPlay()
    {
        local bool bCheeseburger;
    
        super.PostBeginPlay();
    
        bCheeseburger = CanHasCheeseburger();
        `log(bCheeseburger);
    }

    This will give bCheeseburger whatever value the function returns us.

  3. Compile the code and test:

    [0004.86] ScriptLog: True
  4. The second way to use it would be to use the function itself as the variable. Since...