/// <summary>
/// 比较两个点是否重合
/// </summary>
/// <param name="point2"></param>
/// <param name="tolerance"> 用户指定的距离容差 </param>
public bool IsAlmostEqualTo(XY point2, double tolerance)
{
return(this.DistanceTo(point2) <= tolerance);
}
/// <summary>
/// 比较两个点是否重合（容差为整个系统的容差 AngleTolerance）
/// </summary>
/// <param name="point2"></param>
public bool IsAlmostEqualTo(XY point2)
{
return(this.DistanceTo(point2) <= VertexTolerance);
}
/// <summary> 计算空间两个点的距离 </summary>
/// <returns></returns>
public double DistanceTo(XY node2)
{
return(Distance(this, node2));
}
/// <summary> 计算空间两个点的距离 </summary>
/// <returns></returns>
public static double Distance(XY point1, XY point2)
{
return((point1 - point2).GetLength());
}
public double DotProduct(XY vector2)
{
return(X * vector2.X + Y * vector2.Y);
}
public double AngleTo(XY vector2)
{
return(Math.Acos(this.DotProduct(vector2) / GetLength() / vector2.GetLength()));
}