Book Image

Corona SDK Mobile Game Development: Beginner's Guide

Book Image

Corona SDK Mobile Game Development: Beginner's Guide

Overview of this book

Corona SDK is the fastest and easiest way to create commercially successful cross platform mobile games. Just ask Robert Nay, a 14 year old who created Bubble Ball - downloaded three million times, famously knocking Angry Birds off the top spot. You don't need to be a programming veteran to create games using Corona. Corona SDK is the number one tool for creating fun, simple blockbuster games. Assuming no experience at all with programming or game development you will learn the basic foundations of Lua and Corona right through to creating several monetized games deployable to Android and Apple stores. You will begin with a crash course in Lua, the programming language underpinning the Corona SDK tool. After downloading and installing Corona and writing some simple code you will dive straight into game development. You will start by creating a simple breakout game with controls optimized for mobile. You will build on this by creating two more games incorporating different features such as falling physics. The book ends with a tutorial on social network integration, implementing in app purchase and most important of all monetizing and shipping your game to the Android and App stores.
Table of Contents (18 chapters)
Corona SDK Mobile Game Development Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

Time for action – counting the lives


Tracking the lives left in the game keeps the player updated on how much sooner it will be until the game is over.

  1. Set up the function called livesCount().

        local livesCount = function()
  2. Display the text for lives every time the number is decremented.

          gameLives = gameLives - 1
          livesText.text = "Lives: " .. gameLives
          livesText.xScale = 0.5; livesText.yScale = 0.5  --> for  
            clear retina display text
          livesText.x = (480 - (livesText.contentWidth * 0.5)) - 15
          livesText.y = 15
          print(gameLives .. " eggs left")
          if gameLives < 1 then
            callGameOver()
          end
        end

What just happened?

livesCount() is a separate function that updates gameLives. It makes sure that you're aware that gameLives = gameLives – 1. This decreases the set value instantiated at the beginning of the code. When gameLives changes values, it displays the update through livesText. The print statement is used towards the end of the...