geom/polygonf.go

package geom

// PointsF is a set of points.
type PointsF []PointF

// PolF creates a polygon of points q.
func PolF(q ...PointF) PolygonF { return PolygonF{Points: q} }

// PolygonF is defined by a set of points (floating point).
type PolygonF struct {
	Points PointsF
}

// Add creates a new polyqon based on p with one or more extra points q.
func (p PolygonF) Add(q ...PointF) PolygonF {
	var t = PolygonF{make(PointsF, len(p.Points)+len(q))}
	copy(t.Points, p.Points)
	copy(t.Points[len(p.Points):], q)
	return t
}