3D Earth Demo APK

View a replica of the earth and play around with a light source!

Drag the screen to rotate either the camera or the light source around the earth, pinch to zoom in or out. You can switch between moving the camera and light by pushing a button on the action bar. If you don't like the way the lighting looks you can tweak some parameters in the menu. You can control the ambient, diffuse and specular components of the light.

The earth texture has a pretty high resolution (2048x1024), there's a normal map to simulate elevations on the earth's surface and a specular map to make sure that the specular highlight is only visible on the oceans, not the land. There's no clouds at present.

If you're interested, the source code for the latest version is available on github:
https://github.com/knpl/earth/

There's not much code. It took a little over a thousand lines. The most interesting parts are probably the motion controls and the shader code.