Tag of the circle (or the circle arc)
Optionalcolor?: stringColor, black by default
OptionalfillStyle?: stringFilling style (transp|fill|-|vert|hor|/|)
Optionalhidden?: booleantrue to get the created surface masked
Optionalopacity?: numberopacity (0 to 1), 1 by default
Optionaltag?: stringThe tag to be applied on the created surface
the created surface if isPromiseMode is false else promise that will be resolved when the object is displayed
Adds a surface delimited by a circle or a circle arc (slice of pie) syntaxes
addSurfaceCircle(c),addSurfaceCircle(c, color),addSurfaceCircle(c, color, fillStyle)andaddSurfaceCircle(c, color, fillStyle, opacity)are allowed too