Virtual Power profile creation?

If it is not a trade secret, could someone at Zwift explain the process and math behind the making of a virtual power profile? Would it be possible for me to create a virtual power profile for my equipment using my PowerTap hub? I have CycleOps roller with a Sports Crafters OverDrive drum, and an older Minoura trainer. Could you list the trainers that already have a virtual power profile on the website somewhere, and not just in the game?