I am trying to develop an Augmented Reality iPhone application in which I will place a 3D object in front of a live camera feed.
I need to zoom in and zoom out the object as the user moves backward/forward, and rotate the 3D model as the user walks around.
Is there a way to do this on the iPhone ?
The open source VRToolkit application by Benjamin Loulier does just this. It overlays a 3-D model onscreen in response to coded tags, rotating and scaling them in response to movement of this tag in the area viewed by the iPhone camera.
It leverages the ARToolkitPlus library to do the marker identification and processing.
However, be aware that this library is GPL-licensed, so you will need to release the source code of any application you build on this under the GPL.