/// <summary>
/// compute the angle between two lines.
/// </summary>
/// <param name="Line1"></param>
/// <param name="Line2"></param>
/// <returns></returns>
public static double AngleBetween(LineCoordinates Line1, LineCoordinates Line2)
{
// the start point of each line is the common point between the two lines.
var commonPoint = LineCoordinates.CommonEndPoint(Line1, Line2);
// the end points of each line.
var end1 = Line1.OtherPoint(commonPoint);
var end2 = Line2.OtherPoint(commonPoint);
// the 360 degree angles of each line.
var angle1 = LineExt.GetAngle(commonPoint, end1);
var angle2 = LineExt.GetAngle(commonPoint, end2);
// the angle between is the diff between the 360 degree angles of the 2 lines.
var angleBet = Angle360.Subtract(angle1, angle2);
if (angleBet.Value > 180)
{
angleBet = Angle360.Subtract(angle2, angle1);
}
return(angleBet.Value);
}
