randomDirection method

Vector3 randomDirection()

Implementation

Vector3 randomDirection() {
  // Derived from https://mathworld.wolfram.com/SpherePointPicking.html

  final u = (math.Random().nextDouble() - 0.5) * 2;
  final t = math.Random().nextDouble() * math.pi * 2;
  final f = math.sqrt(1 - u * u);

  x = f * math.cos(t);
  y = f * math.sin(t);
  z = u;

  return this;
}