/// <summary>
/// 判断两条曲线是否近似平行
/// </summary>
/// <param name="curve1"></param>
/// <param name="curve2"></param>
/// <param name="tolerance">两向量的角度容忍值，默认为1°（角度制）</param>
/// <returns></returns>
/// <remarks>向量角度在±tolerance之间</remarks>
public static bool IsAlmostParallelToByAngle(this Curve curve1, Curve curve2, double tolerance = 1)
{
if (curve1 is Line && curve2 is Line)
{
XYZ xyz1 = (curve1 as Line).Direction;
XYZ xyz2 = (curve2 as Line).Direction;
return(xyz1.IsAlmostParallelToByAngle(xyz2, tolerance));
}
return(false);
}
