Ejemplo n.º 1
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// Circle draws a circle using a path with center (cx,cy) and radius
func Circle(path draw2d.PathBuilder, cx, cy, radius float64) {
	path.ArcTo(cx, cy, radius, radius, 0, -math.Pi*2)
	path.Close()
}
Ejemplo n.º 2
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// Ellipse draws an ellipse using a path with center (cx,cy) and radius (rx,ry)
func Ellipse(path draw2d.PathBuilder, cx, cy, rx, ry float64) {
	path.ArcTo(cx, cy, rx, ry, 0, -math.Pi*2)
	path.Close()
}