Book Image

Haxe Game Development Essentials

Book Image

Haxe Game Development Essentials

Overview of this book

Haxe is a powerful and high-level multi-platform language that's incredibly easy to learn. Used by thousands of developers and many high-profile companies, Haxe is quickly emerging as a forerunner in the area of cross-platform programming. OpenFL builds on top of Haxe to make developing for multiple platforms quick and painless. HaxeFlixel provides you with the tools you need to build amazing 2D games easier than ever before. Cross-platform development has been supercharged using the Haxe programming language, making it increasingly easy and hassle-free to develop multi-platform games. If you've programmed games before and want to learn out how to deliver games across multiple platforms, or develop games faster, then Haxe Game Development Essentials is the book for you. It starts by showing you how to set up your development environment, then running you through some Haxe language fundamentals, and finally taking you through the process of programming a game from start to finish. You will learn how to create a side scrolling shooter game using HaxeFlixel. Next you will learn to enhance the game with new gameplay features, user interfaces, animations, sound, and configuration files to make your game expandable. Once your game is built and ready, you will learn how to deploy it to web, Android, iOS, and desktop systems. By the end of this book, you will be confident about creating multi-platform games using Haxe, OpenFL, and HaxeFlixel in a faster and easier way.

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Haxe Game Development Essentials
Nov, 2015 | 188 pages
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Table of Contents (16 chapters)
Haxe Game Development Essentials
Haxe Game Development Essentials
Credits
Credits
About the Author
About the Author
Acknowledgements
Acknowledgements
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Getting Started
Getting Started
What's Haxe?
Installation
Setting up target platforms
Hello World
Summary
2
Building a New Game
Building a New Game
The Haxe syntax
Setting up a new HaxeFlixel project
Adding a background and basic UI
Making enemies
Instantiating enemies and adding interaction
Creating the end screen
Restarting the level
Implementing the game timer
Summary
3
Dealing with Menus and Screen Flow
Dealing with Menus and Screen Flow
Adding new assets
Building the splash screen
Updating the level end screen
Creating the new game HUD
Adding the new game HUD
Summary
4
Delving into Animations and Gameplay
Delving into Animations and Gameplay
Object pooling
Project updates
Creating the explosion effects
Making muzzle flashes
Updating enemies
Creating projectiles
Making the player character
Setting health on the HUD
Adding everything to PlayState
Summary
5
Adding Sound
Adding Sound
Project updates
Creating sound constants
Building the sound manager class
Adding music
Adding menu sounds
Adding gameplay sounds
Summary
6
Working with Configuration Files
Working with Configuration Files
JSON versus XML
Project updates
Understanding the JSON configuration file
Building the enemy spawner
Spawning enemies
Adding movement patterns to enemies
Updating PlayState
Understanding the XML file
Pulling string data from XML
Replacing strings
Updating LevelEndScreen
Summary
7
Deploying to Multiple Platforms
Deploying to Multiple Platforms
Building for Flash
Building for Windows
Building for OS X
Building for Android
Building for iOS
Summary
8
What's Next?
What's Next?
Expanding the game
Exploring advanced features
Continuing on with learning resources
Summary
Index
Index

Setting health on the HUD

Since we now have a character that will take damage, we need a function to update the health display.

Changing hearts

We just need to add one small function to the GameHUD class:

public function setHealth(health:Int):Void{
for (i in 0...healthHearts.length) {
  if(i > (health -1)){
     healthHearts[i].loadGraphic(AssetPaths.healthHeartOff__png);
    }
  }
}

This is a public function that takes in an integer health value.

Inside the function, we loop through each of the hearts on the HUD and check whether its index is greater than the amount of health that was passed in. If it is, then we load the off version of the heart graphic into that heart sprite.

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