Guest Tutorial: Delta Time in Corona

Posted by & filed under Guest Post / Interview, Tutorials.

delta-time-feat

One method of animating, moving, and timing things in games 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 player. To compensate for this, you can use “delta time,” a process which helps ensure that your game speed appears consistent on all devices and during processor-intensive periods. Read further to learn how delta time can be implemented in Corona.

Physics Raycasting and Reflection

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raycast-feat

A few weeks ago, raycasting was added to Corona’s physics system. The core API is an easy-to-use function for casting a “sensor ray” into the physics world — and we didn’t stop with that. Soon after, reflection was added to the raycasting system. Today’s tutorial discusses both of these features and includes a downloadable demo project to assist with your own development.

Physics: Radial Gravity and Predicting Trajectory

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phys-tut-feat

Today’s tutorial features two more physics methods. In specific, we’ll discuss “radial gravity” and how to visually predict the launch trajectory of an object. Better yet, both methods are available as downloadable projects so you can explore the full implementation at the code level. Read on to learn more!

Performance Optimizations

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sportscar

Performance optimization is a topic that concerns all developers and spans all genres. Today’s tutorial discusses 10 useful performance tips that are not necessarily “familiar” to Corona developers. Read on to learn how these tips and tricks can improve the performance of your app.

New Widgets: Part 3

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widget-3-feat

Today’s tutorial discusses the remainder of the new widgets introduced recently, available in Daily Builds. These include the “table view,” “scroll view,” “picker wheel,” and “progress bar.” Read on to learn about the features of these new widgets and how to easily implement them into your Corona app.

New Widgets: Part 2

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widget-2-feat

After much anticipation, we’ve finally released the majority of new Corona widgets! All new widgets share a common trait: each has been written atop a new foundation that is more flexible and stable. Today’s tutorial outlines five of the new widgets — read further to learn how to implement them in your apps.

More Physics Tricks Explained

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phystrick-feat

Today’s tutorial introduces a few new physics methods for your bag of tricks. We’ll solve the “Can I jump?” issue for 2D side-view games, and also discuss how to handle “sticky projectiles” and basic “wind tunnel” behavior. Three sample projects are available for download in order to study each case.

iOS Tutorial: Using Email Attachments

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email-feat

Would you like to open an email attachment with your own custom extension directly in your iOS app? Today’s guest tutorial walks you through the essential steps, including the necessary additions to “build.settings” and the functions required to load an email attachment into your app’s local directory. Read further to learn how!