People Aim

How do I get the aim of people then print it out as a line from them to where they look?

saitohud (http://code.google.com/p/saitohud/) have that feature (afaik trace_aims 1) but it didn’t updated for gmod13

upd
http://code.google.com/p/saitohud/source/search?q=traceAims&origq=traceAims&btnG=Search+Trunk