/// <summary>
/// 判断直线是否垂直
/// </summary>
/// <param name="line1">直线1</param>
/// <param name="line2">直线2</param>
/// <param name="Allowance">容差</param>
/// <returns>两线是否垂直</returns>
public static bool Perpendicular(Line line1, Line line2, double allowance)
{
LineSegment3d l1 = new LineSegment3d(line1.StartPoint, line1.EndPoint);
LineSegment3d l2 = new LineSegment3d(line2.StartPoint, line2.EndPoint);
Tolerance tol = new Tolerance(allowance, allowance);
return(l1.IsPerpendicularTo(l2, tol));
}
