The quaternion you get fromTwoVectors() does not depend on their lengths

main.dart

//import 'dart:math';
import 'package:vector_math/vector_math.dart';

void main() {
  var x1 = Vector3(1, 0, 0);
  var x2 = Vector3(2, 0, 0);
  //var y = Vector3(0,0,1);
  var z1 = Vector3(0, 1, 0);
  var z3 = Vector3(0, 3, 0);
  var q1 = Quaternion.fromTwoVectors(x1, z1);
  var q2 = Quaternion.fromTwoVectors(x2, z3);
  print(q1);
  print(q2);
}