If anyone wears 11-12 I've got my old Nike Air Pegasus and some Addidas you can have. Seriously, the parkour shoes by K-swiss, 5.10 shoes, etc.. etc.. are great, but don't feel too pressured into getting them. Just know what to look for in your shoe and it won't be hard to find one, I mean, who thought that the Merrels would be any good? They looked like boots! But everyone was wearing them for pk. The Air Pegasus lasted me through my first 2 years, though I think in the newer versions they added some plastic to the arch... grr...
I guess maybe everything I know could be outdated though. I mean, hell, I bought the Ariakes too, and kaelin has the Kirovs.
edit:: david, i'm not quite sure what you're asking, you want a perspective drawing of a rail with a foot/shoe on it? I'm assuming the angle is from bottom + end of rail looking up?