Convert 2:1 equirectangular panorama to cube map

Question

I\'m currently working on a simple 3D panorama viewer for a website. For mobile performance reasons I\'m using the three.js CSS3 renderer. This requires a cube

Answer 1

There are various representations of environment maps. Here is a nice overview.

Overview - Panoramic Images

If you use Photosphere (or any panorama app for that matter), you most likely already have the horizontal latitude / longitude representation. You can then simply draw a textured three.js SphereGeometry. Here is a tutorial on how to render earth.

Tutorial - How to Make the Earth in WebGL?

Best of luck :).