Method equal

contents/jarvis_march/code/go/jarvis.go:23–25

(o point)

}

func (p point) equal(o point) bool {
	return p.x == o.x && p.y == o.y
}

func counterClockWise(p1, p2, p3 point) bool {
	return (p3.y-p1.y)*(p2.x-p1.x) >= (p2.y-p1.y)*(p3.x-p1.x)