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Additional resources for Professional Augmented Reality Browsers for Smartphones: Programming for junaio, Layar and Wikitude

Sample text

With the user’s current location and their direction known, the nearby POIs can be displayed in the camera window. As the user moves the mobile device around, the accelerometer detects the elevation while the compass continues to detects the direction the user is currently facing. This combination enables the application to use the map data to build the AR view. In Figure 3-1, you can see POIs from the Qype world for the Wikitude browser shown on a map, with the map indicating their actual location.

Information Bar Once a user selects the info bubble, a short description about that POI is displayed in the information bar, offering the user more information about the POI active in the info bubble. If a user selects the text in the information bar, they are taken to a longer description about the POI. Depending on the browser, this can be a web page, a fi le, or text. Range The ability for the user to set the search range enables the application to limit the distance for the POIs that are returned.

6) running on an iPhone. A common problem with AR applications is they draw all the information bubbles on the same horizontal plane. indd 36 5/4/11 3:58:16 PM Layar Reality Browser ❘ 37 POI you are interested in is partially obscured. As shown in Figure 3-27, several POIs bubbles can become clustered together. Layar has a really useful feature that provides a bird’s-eye view of the horizontal plane so you can see a distance scale. As a result, those partly hidden POIs become visible. It’s a rather nifty feature to help de-clutter the window and simplify selections.

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