Developing Games With Ruby
Developing Games With Ruby
For those who write code for living
About the Book
Once there was a boy who fell in love with this magical device that could bring things to life inside a glaring screen. He spent endless hours exploring imaginary worlds, fighting strange creatures, shooting pixelated spaceships, racing boxy cars. The boy kept pondering. "How is this made? I want to create my own worlds...".
Then he discovered programming. "I can finally do it!" - he thought. And he tried. And failed. Then he tried harder. He failed again and again. He was too naive to realize that those worlds he was trying to create were too sophisticated, and his knowledge was too limited. He gave up creating those worlds.
What he didn't give up is writing code for this magical device. He realized he isn't smart enough to create worlds, yet he found out he could create simpler things like small applications - web, desktop, server side or whatnot. Few years later he found himself getting paid to make those.
Applications got increasingly bigger, they spanned across multiple servers, integrated with each other, became pats of huge infrastructures. The boy, now a grown man, was all into it. It was fun and challenging enough to spend over 10000 hours learning and building what others wanted him to build.
Some of these things were useful, some where boring and pointless. Some were never finished. There were things he was proud of, there were others that he wouldn't want to talk about, nonetheless everything he built made him a better builder. Yet he never found the time, courage or reason to build what he really wanted to build since he was a little boy - his own worlds.
Until one day he realized that no one can stop him from following his dream. He felt that equipped with his current knowledge and experience he will be able to learn to create worlds of his own. And he went for it.
This boy must live in many software developers, who dream about creating games, but instead sell their software craftsmanship skills to those who need something else. This boy is me, and you. And it's time to set him free.
Welcome to the world of game development that was waiting for you all these years.
A word from the author
Hey! Are you a game developer? I am building Game Hero - an online community for indie game developers. You are welcome to join and share your work!
- A Boy Who Wanted To Create Worlds
- Why Ruby?
- What You Should Know Before Reading This Book
What Are We Going To Build?
- Game Development Library
- Theme And Mechanics
Preparing The Tools
- Getting Gosu to run on Mac Os X
- Getting The Sample Code
- Other Tools
- Hello World
- Screen Coordinates And Depth
- Main Loop
- Moving Things With Keyboard
- Images And Animation
- Music And Sound
- Using Tilesets
- Integrating With Texture Packer
- Combining Tiles Into A Map
- Using Tiled To Create Maps
- Loading Tiled Maps With Gosu
- Generating Random Map With Perlin Noise
- Player Movement With Keyboard And Mouse
- Game Coordinate System
Prototyping The Game
- Switching Between Game States
- Implementing Menu State
- Implementing Play State
- Implementing World Map
- Implementing Floating Camera
- Implementing The Tank
- Implementing Bullets And Explosions
- Running The Prototype
Optimizing Game Performance
- Profiling Ruby Code To Find Bottlenecks
- Advanced Profiling Techniques
- Optimizing Inefficient Code
- Profiling On Demand
- Adjusting Game Speed For Variable Performance
- Frame Skipping
Refactoring The Prototype
- Game Programming Patterns
- What Is Wrong With Current Design
- Decoupling Using Component Pattern
- Adding Enemy Objects
- Adding Bounding Boxes And Detecting Collisions
- Catching Bullets
- Implementing Turn Speed Penalties
- Implementing Terrain Speed Penalties
Implementing Health And Damage
- Adding Health Component
- Inflicting Damage With Bullets
Creating Artificial Intelligence
- Designing AI Using Finite State Machine
- Implementing AI Vision
- Controlling Tank Gun
- Implementing AI Input
- Implementing Tank Motion States
- Wiring Tank Motion States Into Finite State Machine
Making The Prototype Playable
- Drawing Water Beyond Map Boundaries
- Generating Tree Clusters
- Generating Random Objects
- Implementing A Radar
- Dynamic Sound Volume And Panning
- Giving Enemies Identity
- Respawning Tanks And Removing Dead Ones
- Displaying Explosion Damage Trails
- Debugging Bullet Physics
- Making Camera Look Ahead
- Reviewing The Changes
Dealing With Thousands Of Game Objects
- Spatial Partitioning
- Implementing A Quadtree
- Integrating ObjectPool With QuadTree
- Moving Objects In QuadTree
- Implementing Base Powerup
- Implementing Powerup Graphics
- Implementing Powerup Sounds
- Implementing Repair Damage Powerup
- Implementing Health Boost
- Implementing Fire Rate Boost
- Implementing Tank Speed Boost
- Spawning Powerups On Map
- Respawning Powerups After Pickup
Implementing Heads Up Display
- Design Considerations
- Rendering Text With Custom Font
- Implementing HUD Class
Implementing Game Statistics
- Tracking Kills, Deaths and Damage
- Making Damage Personal
- Tracking Damage From Chain Reactions
- Displaying Game Score
Building Advanced AI
- Improving Tank Navigation
- Implementing Demo State To Observe AI
- Visual AI Debugging
- Making AI Collect Powerups
- Seeking Health Powerups After Heavy Damage
- Evading Collisions And Getting Unstuck
Wrapping It Up
- Lessons Learned
- Special Thanks
The Leanpub 45-day 100% Happiness Guarantee
Within 45 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.
See full terms
Free Updates. DRM Free.
If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).
Most Leanpub books are available in PDF (for computers), EPUB (for phones and tablets) and MOBI (for Kindle). The formats that a book includes are shown at the top right corner of this page.
Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.
Ansible for KubernetesJeff Geerling
Ansible is a powerful infrastructure automation tool. Kubernetes is a powerful application deployment platform. Learn how to use these tools to automate massively-scalable, highly-available infrastructure.
Practical FP in Scala: A hands-on approachGabriel Volpe
A practical book aimed for those familiar with functional programming in Scala who are yet not confident about architecting an application from scratch.
Together, we will develop a purely functional application using the best libraries in the Cats ecosystem, while learning about design patterns and best practices.
Functional Design and ArchitectureAlexander Granin
Software Design in Functional Programming, Design Patterns and Practices, Methodologies and Application Architectures. How to build real software in Haskell with less efforts and low risks. The first complete source of knowledge.
Production HaskellMatt Parsons
Are you excited about Haskell, but don't know where to begin? Are you thrilled by the technical advantages, but worried about the unknown pitfalls? This book has you covered.
Tame your Work FlowSteve Tendon and Daniel Doiron
Do you need a high performance enterprise governance approach improving management, execution and delivery while dealing with multiple projects/products, events, stakeholders and teams? Giving you better bottom line results, faster time to market, less work, better predictability, happier employees, and delighted clients? Then learn about TameFlow!
Ansible for DevOpsJeff Geerling
Ansible is a simple, but powerful, server and configuration management tool. Learn to use Ansible effectively, whether you manage one server—or thousands.
Machine Learning EngineeringAndriy Burkov
"If you intend to use machine learning to solve business problems at scale, I'm delighted you got your hands on this book."
—Cassie Kozyrkov, Chief Decision Scientist at Google
"Foundational work about the reality of building machine learning models in production."
—Karolis Urbonas, Head of Machine Learning and Science at Amazon
C++ Best PracticesJason Turner
Level up your C++, get the tools working for you, eliminate common problems, and move on to more exciting things!
Composing SoftwareEric Elliott
All software design is composition: the act of breaking complex problems down into smaller problems and composing those solutions. Most developers have a limited understanding of compositional techniques. It's time for that to change.
El Manual del ManagerKeyvan Akbary, Félix López, and Álvaro Salazar
¿Has deseado alguna vez el haber tenido una buena introducción al rol del Engineering Manager? En este libro aprenderás lo necesario para ejercer el rol de una manera efectiva: Expectativas y Responsabilidades del Rol, 1-1s, Ayudar a Crecer, Objetivos, Planes de Carrera, Cultura, Feedback, Contratación, Cultura de Producto y mucho más.
The Tester's Library
8 BooksThe Tester's Library consists of eight five-star books that every software tester should read and re-read. As bound books, this collection would cost over $200. Even as e-books, their price would exceed $80, but in this bundle, their cost is only $49.99. Here are the books, and why they should be in your library: Perfect Software and Other...
11 BooksIn this bundle, you will find 10 different agile books. They are about different aspects of being agile. - finding a job - doing coding dojo's - Retrospectives - Personal kanban - a non-typical coaching book and even a book that gives you an insight in the lives of some agile people.
WTFlop 6M + HU - Beta Bundle
Marionette.js A to Z
Build A Better Backbone App
3 BooksThe best way to learn new development skills is through experience, but that takes time you don't have.Get the best of both worlds with this bundle: you'll learn how to produce modern web applications by learning from experienced developers like Derick Bailey and David Sulc. BackboneJS is one of the favorite tools on the web today, but it...
General Systems Thinker Bundle
5 BooksThe General Systems Thinker Bundle is just that: a bundle of five books to advance the reader one giant step toward improved thinking, based on General Systems principles. Four of the books are the complete General Systems Series. The fifth is fictional piece which shows some general systems thinkers in action. It's a mystery in which a group of...
Experiential Learning Bundle
4 BooksThis bundle provides all four volumes of the popular Experiential Learning Series at a savings of $20 over the price if purchased separately.
2 BooksAfter getting up and running with Ansible in Jeff Geerling's Ansible for DevOps, strengthen your skills managing tens to thousands of instances and services in Amazon's AWS cloud with Yan Kurniawan's Ansible for AWS.
Learn ECMAScript 6 inside and out
2 BooksFor any technology, it helps to get multiple points of view on the functionality to get the best possible understanding. For ECMAScript 6/2015, no two resources are recommended more frequently thanExploring ES6by Dr. Axel Rauschmayer andUnderstanding ECMAScript 6by Nicholas C. Zakas. These two points of view, investigating the specification and...
Software architecture, for systems old and new
2 BooksThis bundle includes books about hands-on software architecture.