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 – Comparisons


  1. Let's take a look at two ints and the various comparison operators we can use on them.

    var int Int1, Int2;
    
    function PostBeginPlay()
    {
        'log(Int1 == Int2);
    }
    
    defaultproperties
    {
        Int1=5
        Int2=5
    }

    Setting both of them to the same value and using the equal comparison gives us True in the log:

    [0007.79] ScriptLog: True

    If the variables weren't exactly the same, we would get False.

  2. The opposite of this comparison is "Not Equal", which is denoted by an exclamation point followed by an equal sign. If we wanted to know if two variables weren't the same, we would use this.

    var int Int1, Int2;
    
    function PostBeginPlay()
    {
        'log(Int1 != Int2);
    }
    
    defaultproperties
    {
        Int1=3
        Int2=5
    }

    Since they have different values, we'll get True in the log again:

    [0007.70] ScriptLog: True

    Equal or not equal also apply to vectors and rotators. Each element in those structs is compared to each other, and it will return False if any of them are different.

  3. For greater than or...