namespace Yw.Geometry
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{
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public class EquipCurveHelper
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{
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/// <summary>
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/// 根据流量扬程线,以及给定设计点, 返回交点和装置曲线
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/// </summary>
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/// <param name="qh"></param>
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/// <param name="design_pt"></param>
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/// <param name="sect_pt"></param>
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/// <returns></returns>
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static public Yw.Geometry.EquipCurveParas CalcEquipCurve(
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Yw.Geometry.CubicSpline2d qh,
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Yw.Geometry.Point2d design_pt,
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out Yw.Geometry.Point2d sect_pt)
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{
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return CalcEquipCurve(qh, design_pt, 0, false, 11, out sect_pt);
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}
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/// <summary>
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/// 根据流量扬程线,以及给定设计点,以及装置曲线0流量时的扬程点, 返回交点和装置曲线
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/// </summary>
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/// <param name="qh"></param>
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/// <param name="design_pt"></param>
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/// <param name="eq_zero_h"></param>
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/// <param name="sect_pt"></param>
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/// <returns></returns>
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static public Yw.Geometry.EquipCurveParas CalcEquipCurve(
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Yw.Geometry.CubicSpline2d qh,
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Yw.Geometry.Point2d design_pt,
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double eq_zero_h,
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out Yw.Geometry.Point2d sect_pt)
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{
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return CalcEquipCurve(qh, design_pt, eq_zero_h, false, 11, out sect_pt);
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}
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/// <summary>
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/// 根据流量扬程线,以及给定设计点,以及装置曲线0流量时的扬程点, 返回交点和装置曲线
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/// </summary>
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/// <param name="qh"></param>
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/// <param name="design_pt"></param>
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/// <param name="eq_zero_h"></param>
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/// <param name="is_exend"></param>
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/// <param name="fit_pt_count"></param>
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/// <param name="sect_pt"></param>
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/// <returns></returns>
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static public Yw.Geometry.EquipCurveParas CalcEquipCurve(
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Yw.Geometry.CubicSpline2d qh,
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Yw.Geometry.Point2d design_pt,
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double eq_zero_h,
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bool is_exend,//当design_pt超过曲线时, 是否延长装置线到design_pt位置
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int fit_pt_count,
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out Yw.Geometry.Point2d sect_pt)
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{
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sect_pt = GetSectPoint(qh, design_pt, eq_zero_h);
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if (sect_pt == null)
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{
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return null;
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}
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if (is_exend)
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{
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Yw.Geometry.Point2d end_pt;
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if (sect_pt.X > design_pt.X)
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end_pt = sect_pt;
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else
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end_pt = design_pt;
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//
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return new Yw.Geometry.EquipCurveParas(eq_zero_h, end_pt, fit_pt_count);
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}
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else
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{
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return new Yw.Geometry.EquipCurveParas(eq_zero_h, sect_pt, fit_pt_count);
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}
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}
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/// <summary>
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/// 计算装置曲线与流量扬程曲线的交点
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/// </summary>
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/// <param name="qh"></param>
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/// <param name="design_pt"></param>
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/// <param name="eq_zero_h"></param>
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/// <returns></returns>
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static public Yw.Geometry.Point2d GetSectPoint(
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Yw.Geometry.CubicSpline2d qh,
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Yw.Geometry.Point2d design_pt,
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double eq_zero_h)
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{//有一种情况: 用包络法有交点(在最末尾),但用装置曲线绘制时,与装置曲线没有交点,因为交点已超过曲线最大值
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double ratio_extend = 1.15;//CurveExpressQH适当延长一点
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var sect_pt = Yw.Geometry.ParabolaCurveHelper_H.GetSectPoint(qh, design_pt, eq_zero_h, ratio_extend);
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if (sect_pt == null)
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{
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return null;
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}
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if (sect_pt.X > qh.MaxX * ratio_extend)
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{
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return null;
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}
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return sect_pt;
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}
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/// <summary>
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/// 计算装置曲线与流量扬程曲线的交点
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/// </summary>
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/// <param name="CurveExpressQH"></param>
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/// <param name="DesignPoint"></param>
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/// <param name="eq_zero_h"></param>
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/// <param name="ratio_extend"></param>
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/// <returns></returns>
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static public Yw.Geometry.Point2d GetSectPoint(
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Yw.Geometry.CubicSpline2d CurveExpressQH,
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Yw.Geometry.Point2d DesignPoint,
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double eq_zero_h,
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double ratio_extend)
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{//有一种情况: 用包络法有交点(在最末尾),但用装置曲线绘制时,与装置曲线没有交点,因为交点已超过曲线最大值
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var sect_pt = Yw.Geometry.ParabolaCurveHelper_H.GetSectPoint(CurveExpressQH, DesignPoint, eq_zero_h, ratio_extend);
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if (sect_pt == null)
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{
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return null;
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}
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if (sect_pt.X > CurveExpressQH.MaxX * ratio_extend)
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{
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return null;
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}
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return sect_pt;
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}
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}
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}
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