Thank you for doing it ! What was the motivation behind it/when did you start building it ?

I never built anything with it but reading through the source code got me to learn so much about programming. I probably spent more time copying stuff from Irrlicht/Ogre3D/ODE (although I never managed to grok that one) than anything else in high school.

I originally wanted to create a 3D game - and needed an engine for it. Never made it to the 3D game part, though :)