I first got into TouchDesigner via Amon Tobin’s ISAM project. Here’s an article on Derivative’s own site discussing the application built in TD, the projection mapping et cetera, as well as some video of it in action.
There’s a decent book from Pakt publishing which goes in depth into Max/MSP in conjunction with TD that is pretty good, if you like learning from books. pppanik has some good tutorials on youtube for creating obligatory generative pieces