Method PerpDot

util.go:312–314

PerpDot returns the perp dot product between OP and OQ, i.e. zero if aligned and |OP|*|OQ| if perpendicular. This is the cross product in two dimensions.

(q Point)

// PerpDot returns the perp dot product between OP and OQ, i.e. zero if aligned and |OP|*|OQ| if perpendicular. This is the cross product in two dimensions.
func (p Point) PerpDot(q Point) float64 {
	return p.X*q.Y - p.Y*q.X
}

// Length returns the length of OP.
func (p Point) Length() float64 {