Category: Tutorials, Tips and Demos

Tutorial: Introducing Google Play Game Services

At the Google I/O conference last May, Google announced “Google Play game services” and began offering online game support similar to Apple’s GameCenter. Corona Labs, working with Google, demonstrated live apps at Google I/O using these game services. And now, following on the heels of this demo, we’ve rolled out the first version of Google Play game services support in Corona SDK. Read further to learn how to implement leaderboards and achievements on Android using Google Play game services.

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Tutorial: Delta time in Corona

One method of animation and timing is to programmatically change certain values on each frame update. However, If the frame rate fluctuates, the speed of this action may seem inconsistent to the user. To compensate for this, you can use “delta time,” a process which helps the run speed appear more consistent during processor-intensive periods.

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Tutorial: Handling Cross-Scene Audio

In most apps, certain audio files are needed throughout the app while other audio files are only required in a specific scene. You may also encounter an instance where a particular audio file is loaded in one scene but “overlaps” into another scene, which can complicate the cleanup process. Today’s tutorial discusses how to overcome both of these scenarios with the use of a sound management module.

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Tutorial: Goodbye Globals!

In Lua, global variables are risky. We’ve been stressing the “avoid globals” stance for a long time, and today’s tutorial shows you how. In addition, we illustrate the dangers and pitfalls of using global variables without a thorough knowledge of how Lua handles them.

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New System Info Properties

This week’s brief tutorial discusses some new properties that are available to Corona Pro users since Build 1086. In specific, Android users can now get the physical screen DPI and size of various devices, and iOS users have some new API properties related to Apple’s move away from UDID. Read further to learn more.

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Tutorial: Lua string magic

Today’s tutorial features Lua string manipulation and parsing techniques which can be useful in several applications, especially business or database-powered apps where you need to check and confirm that text is formatted properly. Read further to learn about these string-related helper functions.

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