Book Image

Swift 3 Game Development - Second Edition

By : Stephen Haney
Book Image

Swift 3 Game Development - Second Edition

By: Stephen Haney

Overview of this book

Swift is the perfect choice for game development. Developers are intrigued by Swift 3.0 and want to make use of new features to develop their best games yet. Packed with best practices and easy-to-use examples, this book leads you step by step through the development of your first Swift game. This book starts by introducing SpriteKit and Swift's new features that can be used for game development. After setting up your first Swift project, you will build your first custom class, learn how to draw and animate your game, and add physics simulations. Then, you will add the player character, NPCs, and powerups. To make your game more fun and engaging, you will learn how to set up scenes and backgrounds, build fun menus, and integrate with Apple Game Center to add leaderboards and achievements. You will then make your game stand out by adding animations when game objects collide, and incorporate proven techniques such as the advanced particle system and graphics. Finally, you will explore the various options available to start down the path towards monetization and publish your finished games to the App Store. By the end of this book, you will be able to create your own iOS games using Swift and SpriteKit.
Table of Contents (20 chapters)
Swift 3 Game Development - Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Bee meets bee


You may have noticed that we positioned bee2 and bee3 at the same height in the game world. We only need to push one of them horizontally to create a collision-perfect crash test dummies! We can use an impulse to create velocity for the outside bee.

Locate the didMove function in GameScene.swift. At the bottom, preceding all of our spawn code, add this line:

bee2.physicsBody?.applyImpulse(CGVector(dx: -3, dy: 0)) 

Run the project. You will see the outermost bee fly toward the middle and crash into the inner bee. This pushes the inner bee to the left and slows the first bee from the contact.

Attempt the same experiment with a variable: Increased mass. Before the impulse line, add this code to adjust the mass of bee2:

bee2.physicsBody?.mass = 0.2 

Run the project. Hmm-our heavier bee does not move very far with the same impulse (it is a 200-gram bee, after all). It eventually bumps into the inner bee, but it is not a very exciting collision. We will need to crank up the...