iPhone knows your latitude and longitude --- your position on the surface of the Earth. It also knows the location of each star. Lastly, it knows which way your screen is pointing.
That's all the knowledge that's needed in order to display a starfield on the screen.
Thanks. I thought it would process the data on screen just like this augmented reality translation app (forgot the name). But this approach is really interesting. I need to check the app out :)
iPhone knows your latitude and longitude --- your position on the surface of the Earth. It also knows the location of each star. Lastly, it knows which way your screen is pointing.
That's all the knowledge that's needed in order to display a starfield on the screen.