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 – Calling non-state functions


Before we get into this experiment, there's a small cleanup job we have to do. We'll leave the single-enemy code intact; we'll just take out our Tick logging stuff.

  1. Delete the non-state Tick function as well as the NoState function.

  2. Take the NoState timer out of the RunAway function:

    function RunAway()
    {
      GoToState('Fleeing');
    }
  3. Delete the log lines from the Seeking, Attacking, and Fleeing states' Tick functions.

  4. There we go, now we're ready to start our next experiment. First, let's set up a repeating timer by adding a PostBeginPlay function:

    function PostBeginPlay()
    {
      SetTimer(1.0, true, 'LogTimer');
    }

Every second we'll be calling this new function.

  1. Now let's create the LogTimer function:

    function LogTimer()
    {
      `log("========================");
      `log("Global call:");
      Global.LogMe();
      `log("Non-Global call:");
      LogMe();
    }

A lot of stuff here, but it's simple. First, we call Global.LogMe, then a normal LogMe. We'll see the difference soon.

  1. Let...