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 – Do we really need to give labels to everything?


One label is special and indicates where state code should start executing; this one is called Begin. Let's take a look at a few things we can do with state code, labels, and latent functions.

  1. At the bottom of our Seeking state, underneath all of the functions, but before the closing } symbol, let's write the following code:

    Begin:
      `log("Man I'm tired, I'm going to sleep.");
      Sleep(3.0);
      `log("French toast please!");
    SomeOtherLabel:
      `log("You ever have a deja vu Joel?");
      Sleep(3.0);
      GoTo('SomeOtherLabel');

When state code starts, it starts at the Begin label. First we log something, then we use a latent function called Sleep. Usually when code is running, it will prevent any other code from running until it's finished. This doesn't apply to latent functions, which won't stop other code from running while it's waiting on whatever function it's performing to finish.

After it's done sleeping, we log something else, then...