- ctx.arc (width / 2.0 + radius / 3.2 * Math.cos (270 * Math.PI / 180.0),
- height / 2.0 + radius / 3.2 * Math.sin (270 * Math.PI / 180.0),
- radius, 0, 2 * Math.PI);
+ ctx.translate (radius / 3.2 * Math.cos (270 * Math.PI / 180.0),
+ radius / 3.2 * Math.sin (270 * Math.PI / 180.0));
+ ctx.arc (0, 0, radius, 0, 2 * Math.PI);