Book Image

iOS Game Development By Example

By : Samanyu Chopra
Book Image

iOS Game Development By Example

By: Samanyu Chopra

Overview of this book

Game development has always been an exciting subject for game enthusiasts and players and iOS game development takes a big piece of this cake in terms of perpetuating growth and creativity. With the newest version of iOS and Sprite Kit, comes a series of breathtaking features such as Metal rendering support, camera nodes, and a new and improved Scene Editor. Conceptualizing a game is a dream for both young and old. Sprite Kit is an exciting framework supported by Apple within the iOS development environment. With Sprite Kit, creating stunning games has become an easy avenue. Starting with the basics of game development and swift language, this book will guide you to create your own fully functional game. Dive in and learn how to build and deploy a game on your iOS platform using Sprite Kit game engine. Go on a detailed journey of game development on the iOS platform using the Sprite Kit game engine. Learn about various features implemented in iOS 8 that further increase the essence of game development using Sprite Kit. Build an endless runner game and implement features like physics bodies, character animations, scoring and other essential elements in a game. You will successfully conceive a 2D game along with discovering the path to reach the pinnacle of iOS game development. By the end of the book, you will not only have created an endless runner game but also have in-depth knowledge of creating larger games on the iOS platform. Style and approach An easy-to-follow, comprehensive guide that makes your learning experience more intriguing by gradually developing a Sprite Kit game. This book discusses each topic in detail making sure you attain a clear vision of the subject.
Table of Contents (17 chapters)
iOS Game Development By Example
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Shaders


Shaders in Sprite Kit facilitate SKScenenode to appear with a special, customized, drawing behavior. This can be achieved by creating the SKShader objects and assigning a custom OpenGL ES fragment shader.

If a custom shader (the SKShader object) needs to provide a uniform shader, then you need to create one or more SKUniform objects and associate them with your shader objects. Shader programs are primarily divided into:

  • Vertex shaders

  • Fragment shaders

Let's discuss about both of these in detail:

  • Vertex shaders: These shaders work on each vertex and most of the calculation is done on the vertex part. They are set by Sprite Kit automatically. As the computation of these shaders are mostly done on the vertex part, not much of the CPU's resources are consumed in the formation.

  • Fragment shaders: These shaders are written in OpenGL Shading Language. As the name suggests, they work on each pixel. They use very heavy computation and hence are avoided when too many shaders are required.

    A graphical...