June 29, 2012
2:21 p.m.
Marin asks me if Dr. Geo can do it: http://www.ericforman.com/blog/anthony-mccall-solid-light/ No problem: http://www.dailymotion.com/video/xrupz0_1310-programmed-sketch-rulers_tech -- Dr. Geo -- http://www.drgeo.eu