/// <summary>
/// Calculates all internal angles for the polygon, moving from the first vertex to the next.
/// </summary>
/// <param name="numDigits">If you'd like a cap on the number of digits calculated, you can pass it here.</param>
/// <returns>List of all calculated angles in the polygon.</returns>
public List <double> CalculateAngles(int?numDigits = null)
{
List <double> calcAngles = new List <double>();
for (var i = 0; i < this.Vertices.Count; i++)
{
var leftVertex = i == 0 ? this.Vertices.Last() : this.Vertices[i - 1];
var rightVertex = this.Vertices[(i + 1) % this.Vertices.Count];
var thisVertex = this.Vertices[i];
calcAngles.Add(TriangleHelper.CalculateAngleFromTriangleSides(CoordinateHelper.CalculateLengthOfLine(leftVertex, thisVertex),
CoordinateHelper.CalculateLengthOfLine(rightVertex, thisVertex),
CoordinateHelper.CalculateLengthOfLine(leftVertex, rightVertex),
numDigits));
}
return(calcAngles);
}
