Function NewPolygon

plotter/polygon.go:37–50

NewPolygon returns a polygon that uses the default line style and no fill color, where xys are the rings of the polygon. Different backends may render overlapping rings and self-intersections differently, but all built-in backends treat inner rings with the opposite winding order from the outer ring

(xys ...XYer)

// with the opposite winding order from the outer ring as
// holes.
func NewPolygon(xys ...XYer) (*Polygon, error) {
	data := make([]XYs, len(xys))
	for i, d := range xys {
		var err error
		data[i], err = CopyXYs(d)
		if err != nil {
			return nil, err
		}
	}
	return &Polygon{
		XYs:       data,
		LineStyle: DefaultLineStyle,
	}, nil
}

// Plot draws the polygon, implementing the plot.Plotter
// interface.