func Ellipse(path draw2d.PathBuilder, cx, cy, rx, ry float64) {
	path.ArcTo(cx, cy, rx, ry, 0, -math.Pi*2)
	path.Close()
}
func Ellipse(path draw2d.PathBuilder, cx, cy, rx, ry float64) {
	path.ArcTo(cx, cy, rx, ry, 0, -math.Pi*2)
	path.Close()
}
func Ellipse ( path draw2d . PathBuilder , cx , cy , rx , ry float64 ) { path . ArcTo ( cx , cy , rx , ry , 0 , - math . Pi * 2 ) path . Close ( ) }
// Ellipse draws an ellipse using a path with center (cx,cy) and radius (rx,ry)
Ellipse draws an ellipse using a path with center ( cx cy ) and radius ( rx ry )