namespace IStation.Curve
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{
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/// <summary>
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/// 曲线点
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/// </summary>
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public partial class CurvePoint : JsonList<CurvePoint>, ICloneable
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{
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/// <summary>
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///
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/// </summary>
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public CurvePoint() { }
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/// <summary>
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///
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/// </summary>
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public CurvePoint(int x, int y)
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{
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this.X = x;
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this.Y = y;
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}
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/// <summary>
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///
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/// </summary>
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public CurvePoint(float x, float y)
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{
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this.X = x;
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this.Y = y;
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}
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/// <summary>
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///
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/// </summary>
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public CurvePoint(double x, double y)
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{
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this.X = x;
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this.Y = y;
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}
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/// <summary>
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///
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/// </summary>
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public CurvePoint(decimal x, decimal y)
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{
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this.X = (double)x;
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this.Y = (double)y;
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}
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/// <summary>
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///
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/// </summary>
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public CurvePoint(CurvePoint rhs)
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{
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this.X = rhs.X;
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this.Y = rhs.Y;
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}
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/// <summary>
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/// X
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/// </summary>
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public double X { get; set; }
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/// <summary>
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/// Y
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/// </summary>
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public double Y { get; set; }
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/// <summary>
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/// 获取两点之间的距离
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/// </summary>
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public double Distance(CurvePoint pt)
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{
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if (pt == null)
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{
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return double.MaxValue;
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}
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return Math.Sqrt(Math.Pow(this.X - pt.X, 2) + Math.Pow(this.Y - pt.Y, 2));
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}
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/// <summary>
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/// 获取点到线的距离
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/// </summary>
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public double Distance(List<CurvePoint> ptList)
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{
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if (ptList == null || ptList.Count < 1)
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{
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return double.MaxValue;
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}
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return ptList.Min(x => x.Distance(this));
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}
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/// <summary>
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/// 判断是否是零点
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/// </summary>
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public bool IsZeroPoint()
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{
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if (this.X < 0.01 && this.Y < 0.01)
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{
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return true;
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}
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return false;
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}
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/*/// <summary>
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/// 判断是否为有效点
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/// </summary>
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public bool IsValidPoint()
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{
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if (!(!double.IsNormal(this.X) || !double.IsNormal(this.Y)))
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{
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return true;
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}
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return false;
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}*/
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/// <summary>
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/// 判断是否为无效点
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/// </summary>
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public bool IsInvalidPoint()
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{
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if (double.IsNaN(this.X) || double.IsInfinity(this.X) || this.X == double.MinValue || this.X == double.MaxValue)
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{
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return true;
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}
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if (double.IsNaN(this.Y) || double.IsInfinity(this.Y) || this.Y == double.MinValue || this.Y == double.MaxValue)
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{
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return true;
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}
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return false;
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}
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/// <summary>
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/// 是否沿x轴的射线穿透线段,有交点且在线的左边
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/// </summary>
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public bool IsIntersectLineLeft(CurvePoint pt1, CurvePoint pt2)
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{
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if (pt1 == null || pt2 == null)
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{
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return false;
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}
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if (Math.Abs(pt1.Y - pt2.Y) < 0.0001)
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{
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if (Math.Abs(this.Y - pt1.Y) < 0.0001)
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{
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return true;
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}
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}
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var ymin = UtilsHelper.Min(pt1.Y, pt2.Y);
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var ymax = UtilsHelper.Max(pt1.Y, pt2.Y);
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if (this.Y < ymax && this.Y >= ymin)
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{
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if (this.X <= (pt1.X + (pt2.X - pt1.X) * (this.Y - pt1.Y) / (pt2.Y - pt1.Y)))
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{
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return true;
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}
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}
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return false;
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}
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/// <summary>
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///
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/// </summary>
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public CurvePoint Clone()
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{
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return new CurvePoint(this);
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}
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/// <summary>
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///
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/// </summary>
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object ICloneable.Clone()
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{
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return this.Clone();
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}
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}
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}
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