If people are interested in digging into this kind of thing, there are some very interesting papers on the subject: http://scholar.google.com/scholar?hl=en&q=s

If people are interested in digging into this kind of thing, there are some very interesting papers on the subject: http://scholar.google.com/scholar?hl=en&q=sketch-based+prototyping http://scholar.google.com/scholar?hl=en&q=sketch-based+proto... One of the bigger chunks of funding has come from the U.S. military, which wants to let commanders sketch battlefield diagrams like they do on paper, but get computerized results, both for dissemination, and for use in things like simulations (where typical RTS interfaces are too foreign to be good for realistic wargaming): http://www.qrg.northwestern.edu/papers/files/forbususherchapmaniui2003.pdf http://www.qrg.northwestern.edu/papers/files/forbususherchap... / http://www.cs.northwestern.edu/~gdunham/papers/nuwar-AIIDE05.pdf http://www.cs.northwestern.edu/~gdunham/papers/nuwar-AIIDE05...