private static IEnumerable <Point> CheckPointsNotOnOneLine(Point[] points)
{
List <Vector> vectors = new List <Vector>();
for (int i = 1; i < points.Length; i++)
{
vectors.Add(points[i] - points[i - 1]);
}
vectors.Add(points[0] - points[points.Length - 1]);
bool haveSameAngle = DoubleUtils.CloseToEqual(vectors.Select(v => v.Angle).ToArray());
if (haveSameAngle)
{
throw new ArgumentOutOfRangeException(nameof(points), points, "All points are on the same line");
}
return(points);
}
