star3map is an augmented reality satellite, planet, star, and constellation charting application for your iOS or Android mobile device. When star3map starts up, it uses your device's location service to determine your global position. With that information, and the current time, it will display a view of the current positions of the satellites, planets, stars, and constellations around you. star3map uses the accelerometer and compass to determine exactly what your iphone is pointed at, so you just point your phone in any direction (even down!, even from inside!), and get a labeled view of what is out in space in that direction.

The planet/moon/sun code is a port of the PlanetFinder java applet by Ben Crowell.

The satellite code is the C++ port of sgp4.

The app is available on the App Store now here: star3map.

The source for this app is available here: star3map_v1.5.2_src.zip. The PlanetFinder code is licensed under the terms of the GPL. The r3 library is primarily BSD-style license, however it uses Sean Barrett's truetype and image loading code, which he has put in the public domain.

Some things to note about the star3map source, if you choose to use it:

• PlanetFinder derived code (GPL) is used strictly for computing solar system body positions
• Star and constellation code carries BSD-style license
• r3 library uses BSD-style license
  • bounds and linear algebra support derived from glh_linear.h
  • truetype font support derived from Sean Barrett public domain code
  • image loading support derived from Sean Barrett public domain code
  • atom table for fast/efficient string compares
  • drawing abstraction which includes immediate mode support for OpenGL ES
  • many other elements modeled vaguely after those found in various id tech
    • vars - like cvars
    • command - convert text commands into actions
    • console - for keyboard based command execution
    • filesystem - abstract file access
    • input - convert key bindings into commands
    • output - display output text to console, stderr
  • common elements like loading/saving input bindings and vars
• Source currently compiles and runs on iPhone and Mac platforms.

If you have any questions or problems with star3map, please contact iphone@xyzw.us.