When I looked in the past there were only a handful of proprietary software packages, very expensive, and usually only supporting one or two astronomy applications for the PC. What i'd like to see is something to let nearly any application or game use dome projection including from multiple projectors. Doesn't necessarily have to be a 360x360 dome or even a 180x180, since not everything supports such extreme fields of view, but for those things which do to offer as much support as possible. Projecting onto a dome with a single projector often involves special optics or reflectors which favor resolution in the middle at the expense of being lower at the sides - software is required to pre-warp the image being output to the projector to have it look appropriate. (because of the optics the light reaching the edges is also notably less than the center, some may provide light level correction dimming the center in some cases) This is what makes it unique vs normal multihead solutions.
Is anyone aware of any open source alternatives, in progress projects to do something like this, or general resources similar to this? My specific interest is running open source astronomy programs to a homebuilt planetarium dome but if it could also be used in a flight sim, space sim, and similar it would be awesome beyond belief.
