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 – setting up the timer


We'll need to create a couple of functions that activate the countdown and also stops the countdown at 0 seconds when the game is over.

  1. Set up the timer countdown for the game with a local function called myTimer().

    local myTimer = function()
  2. Have the seconds for the timer countdown by an increment of 1. With the counter text object, display the time using numSeconds. Print out numSeconds to see the countdown in the Terminal window.

            numSeconds = numSeconds - 1
          counter.text = "Time: " .. tostring( numSeconds )
          print(numSeconds)
  3. Create an if statement for when the timer runs out or if all the stars are gone. Within the block, cancel the timer and call callGameOver() to end the round. Close the myTimer() function with end.

          if numSeconds < 1 or stars.numChildren <= 0 then
            timer.cancel(timerInfo)
            panda:pause()
            restartTimer = timer.performWithDelay( 300, function() callGameOver(); end, 1 )
          end
       
     ...