Posted 04 July 2012 - 04:29 PM
It's *very* easy to get confused with the directions and angles in creating an arc. I have been confused on this so many times before I finally got it!
In the example, we are measuring the angle using clockwise measurement. But the arc we're drawing is drawn counter-clockwise!
To measure the degrees when going clockwise, you use positive degrees. That's why we use 270, not -270 or 90.
Don't mix up the direction in which you measure the angle, and the direction you're tracing the arc. Two different things!
Can you point out more specifically where we might have messed it up? I am not seeing it.
Author: Head First HTML5 Programming, Head First HTML and CSS, Head First Design Patterns