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 integers


Let's make an Int.

  1. Declaring an integer is similar to what we did with bools, so let's replace our bool declaration line with this:

    var int NumberOfKittens;

    We can see that we have the same var text that declares our variable, and then we tell the game that our variable is an int. Finally, we set the name of our int to NumberOfKittens.

    The name of the variable should give a hint as to the difference between ints and floats, and why we need ints to begin with instead of using floats for everything. Since we don't want to hurt any defenseless kittens we should only be using whole numbers to represent the number of them. We don't want to have half of a kitten.

  2. As with our bool variable ints have a default value, in this case zero. We can check this by changing our PostBeginPlay function:

    function PostBeginPlay()
    {
       'log("Number of kittens:" @ NumberOfKittens);
    }
    

    Now our AwesomeActor.uc class should look like this:

    class AwesomeActor extends Actor
       placeable;
    ...