+ // Transform to a circular layout.
+ if( parameters.isClockwise )
+ {
+ angle = parameters.beginAngle - parameters.invRadius * x;
+ radius -= yP;
+
+ x = radius * cos( angle );
+ y = -radius * sin( angle );
+ }
+ else
+ {
+ angle = parameters.beginAngle + parameters.invRadius * x;
+ radius += yP;