package geom

func SegLineIntersect(A, B, O, D Vec) (bool, float64) {
	r := Sub(B, A)
	den := Cross(r, D)
	if NearlyZero(den) {
		return false, 0
	}
	t := Cross(Sub(O, A), D) / den
	return t > EPS && t < 1-EPS, t
}