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Private properties, methods and ivars in Objective-C

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To make nice OO code it is important not to show everything, OO programming requires modesty. But, in objective-c keeping methods, properties, and instance variables private is not as straightforward as in other languages (java for instance) .

I'll describe in this article what is encapsulation and why it is important. Then we'll see how keep things private in our objc code.

Augmented Reality on iPhone using ARToolKitPlus

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Augmented reality can be qualified as a "hot topic" in IT, especially since the arrival of all the phone on steroids (iPhone, Android ...) as I like to call them. I'm working on a small application which uses ARToolKitPlus and the new camera APIs of the iPhone SDK4 to display 3D objects in augmented reality. You'll find in this post a video showing how it looks like for now and some explanations about augmented reality. Also I'll release the code under GPL (as ARToolKitPlus is) soon , so stay tuned !

IOS4 and direct access to the camera

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The iPhone SDK4 brought a lot of interesting features. Among them the direct access to the camera is a real asset for AR (Augmented reality) applications or in a more general way for all applications processing the image/video to modify it or extract informations. I played around with the new related APIs so I'm going to tell you more about it and share some snippets showing how to use these APIs. If you want to know more about the AVFoundation framework, AVCaptureDeviceInput, AVCaptureVideoDataOutput and AVCaptureSession this article is for you.

First Article

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Ok... well ... Writing a first post is always difficult so first let me introduce myself. My name is Benjamin Loulier I'm French (but not the kind of French you can find in our soccer team).
For now I'm studying computer sciences in "L'école des Mines de Saint-Etienne", but I'll spend the next two years in Purdue University in the CIT department. If you are studying around say hi. Just in case I'm looking for a tennis partner ;-)
I'm fond of new technologies, and just in case you don't realize while reading my articles I'm also a big fan of apple. I have been using Apple computers since I'm a kid. And when I say kid, I mean since I'm five years old ;-).