The Original Macintosh:    17 of 126  Round Rects Are
Everywhere! Author: Andy Hertzfeld Date: May 1981 Characters:
Steve Jobs, Bill Atkinson Topics: Software Design, Inspiration,
QuickDraw Summary: Steve inspires Bill by pointing out something
about the real world  Bill Atkinson worked mostly at home, but
whenever he made significant progress he rushed in to Apple to
show it off to anyone who would appreciate it. This time, he
visited the Macintosh offices at Texaco Towers to show off his
brand new oval routines, which were implemented using a really
clever algorithm.  Bill had added new code to QuickDraw (which
was still called LisaGraf at this point) to draw circles and
ovals very quickly. That was a bit hard to do on the Macintosh,
since the math for circles usually involved taking square roots,
and the 68000 processor in the Lisa and Macintosh didn't support
floating point operations. But Bill had come up with a clever
way to do the circle calculation that only used addition and
subtraction, not even mul