isClockwise function

bool isClockwise(List<LatLng> points)

Implementation

bool isClockwise(List<LatLng> points) {
  double sum = 0;
  for (int i = 0; i < points.length; ++i) {
    final a = points[i];
    final b = points[(i + 1) % points.length];

    sum += (b.longitude - a.longitude) * (b.latitude + a.latitude);
  }
  return sum >= 0;
}