How to start writing an augmented reality application

Question

I have been looking at creating an augmented reality application. Can anyone suggest a preferred technology platform to start writing an application of this kind.

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Answer 1

FLARToolKit is another good place to look. It's free and uses flash + Actionsctript 3. gotoandlearn DOT com has a couple good video tutorial on how to use the library, I'd give you links to them but stackoverflow says I'm not special enough for more than 1 url.