Wow - this looks really cool! If only I hadn't destroyed so many brain cells in my 20s.
I wonder if Google Maps / Earth has anything like this where you could pinpoint a location and they could visually show when way the sun was coming from. Where I live I'm not sure if there is a road that runs directly E/W or N/S so I never know what direction I'm facing.
I will keep looking at your links to see what can seep into my head. Thanks!