I believe Darkplaces has some visualisation too.
I know how to show paths in Kingpin and Soldier Of Fortune. Do know about other games
Soldier Of Fortune
in console write "aipoints_show 1"
It seems yellow circle is where AI decided to go next. Screenshot is done using "noclip" cheat.
Does anyone know why Kingpin cast more than one path
Edit autoexec.cfg and add these lines (I was not sure about syntax therefore there are few duplicates):
set console 1
set developer 1
set nav_aipath 1
set nav_debug 1
Think, touch, movetype, solid, traceline is what to understand first.
of programming, graphics, gaming, tools ... http://j.mp/bundles/a397723/