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 – Using modulo


  1. Let's look at an example.

    var int Int1, Int2, IntResult;
    
    function PostBeginPlay()
    {
        IntResult = Int1 % Int2;
        'log("IntResult:" @ IntResult);
    }
    
    defaultproperties
    {
        Int1=28
        Int2=5
    }

    28 divided by 5 is 5 with a remainder of 3.

  2. Let's look at the log:

    [0008.12] ScriptLog: IntResult: 3

What just happened?

You may be asking yourself, when will this ever come in handy? Let's say you wanted to know how many bullets a player had in their gun, but you only had the gun's clip size and the player's total number of bullets to work with. A line of code like this would work:

CurrentBullets = TotalBullets % ClipSize;

Instead of having to do any complicated math to figure it out you would be able to use modulo to save some headaches.

Comparisons

Comparing one variable to another is one of the essential tools of any programming language, and UnrealScript is no different. Comparisons give you a boolean true or false. If we wanted to know if two variables were the same...