//
// (C) Copyright 2003-2017 by Autodesk, Inc.
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted,
// provided that the above copyright notice appears in all copies and
// that both that copyright notice and the limited warranty and
// restricted rights notice below appear in all supporting
// documentation.
//
// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
// UNINTERRUPTED OR ERROR FREE.
//
// Use, duplication, or disclosure by the U.S. Government is subject to
// restrictions set forth in FAR 52.227-19 (Commercial Computer
// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
// (Rights in Technical Data and Computer Software), as applicable.
//


using System;
using System.Collections.Generic;
using System.Text;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using Autodesk.Revit;
using Autodesk.Revit.ApplicationServices;
using Autodesk.Revit.DB.Plumbing;
using Autodesk.Revit.DB.Mechanical;
using System.Diagnostics;
using Element = Autodesk.Revit.DB.Element;
using System.Collections;
using System.Windows.Forms;
using Autodesk.Revit.DB.Electrical;
using Autodesk.Revit.UI.Selection;
using KDCS.Utils;
using KMBIM.Revit.Tools.Utils;

namespace KMBIM
{

    public enum EnumAvoidObstructionType
    {
        None = 0,
        AvoidUpDn,
        Avoid_Up,
        Avoid_Dn,
        AvoidDnUp,
        AvoidUp_,
        AvoidDn_
    }
    public enum EnumAvoidObstructionCheckPoint
    {
        None = 0,
        AO_ChectPointTop,
        AO_ChectPointBottom,
        AO_ChectPointLeft,
        AO_ChectPointRight,
        AO_ChectPointCenter,
        AO_ChectPointOther    // ��ֹ� �߽ɼ����� ȸ�� ��� Ȯ��
    }

    public enum EnumPipeConnectType
    {
        None = 0,
        Connect,
        Prev,
        Next
    }
    /// <summary>
    /// Custom filter for selection.
    /// </summary>
    public class AvoidObstructionSelectionFilter : ISelectionFilter
    {
        private RevitLinkInstance _RevitLinkInstance;
        private List<Type> m_listsElementType = null;  // Ư�� ������ ������ �� �ֵ��� �Ѵ�.

        public AvoidObstructionSelectionFilter(List<Type> lstElementType)
        {
            m_listsElementType = new List<Type>();
            foreach (Type t1 in lstElementType)
            {
                m_listsElementType.Add(t1);
            }
        }
        public bool AllowElement(Element elem)
        {
            Type etype = elem.GetType();
            
            foreach (Type t1 in m_listsElementType)
            {
                if (etype == t1)
                {
                    if (etype == typeof(FamilyInstance))  // �йи� �ν��Ͻ�
                    {
                        Category cat = elem.Category;
                        if (cat != null)
                        {
                            if (cat.Id.IntegerValue.Equals((int)BuiltInCategory.OST_StructuralFraming)) return true;
                            else return false;
                        }
                    }
                    else if (etype == typeof(RevitLinkInstance))
                    {
                        _RevitLinkInstance = elem as RevitLinkInstance;
                        return true;

                    }else  return true;
                }
            }
            return false;
        }

        public bool AllowReference(Reference refer, XYZ point)
        {
 
            if (_RevitLinkInstance != null)
            {
                Element e = _RevitLinkInstance.GetLinkDocument().GetElement(refer.LinkedElementId);
                // Accept the selection if the element exists and is of the correct type          
                var t = e.GetType();
                if (t.Equals(typeof(FamilyInstance)))
                {
                    Category cat = e.Category;
                    if (cat != null)
                    {
                        if (cat.Id.IntegerValue.Equals((int)BuiltInCategory.OST_StructuralFraming)) return true;
                        else return false;
                    }
                    return false;
                }
                else return false;
            }

            return true;
        }

    }

    public class FamilyInstanceSelectionFilter : ISelectionFilter
    {
        private RevitLinkInstance _RevitLinkInstance;
        private List<Type> m_listsElementType = null;  

        public FamilyInstanceSelectionFilter(List<Type> lstElementType)
        {
            m_listsElementType = new List<Type>();
            foreach (Type t1 in lstElementType)
            {
                m_listsElementType.Add(t1);
            }
        }
        public bool AllowElement(Element elem)
        {
            Type etype = elem.GetType();

            foreach (Type t1 in m_listsElementType)
            {
                if (etype == t1)
                {
                    if (etype == typeof(FamilyInstance))  // ?��?�??�스?�스
                    {
                        Category cat = elem.Category;
                        if (cat != null)
                        {
                            if (cat.Id.IntegerValue.Equals((int)BuiltInCategory.OST_GenericModel)) return true;
                            else return false;
                        }
                    }
                    else if (etype == typeof(RevitLinkInstance))
                    {
                        _RevitLinkInstance = elem as RevitLinkInstance;
                        return true;

                    }
                    else return true;
                }
            }
            return false;
        }

        public bool AllowReference(Reference refer, XYZ point)
        {

            if (_RevitLinkInstance != null)
            {
                Element e = _RevitLinkInstance.GetLinkDocument().GetElement(refer.LinkedElementId);
                // Accept the selection if the element exists and is of the correct type          
                var t = e.GetType();
                if (t.Equals(typeof(FamilyInstance)))
                {
                    Category cat = e.Category;
                    if (cat != null)
                    {
                        if (cat.Id.IntegerValue.Equals((int)BuiltInCategory.OST_GenericModel)) return true;
                        else return false;
                    }
                    return false;
                }
                else return false;
            }

            return true;
        }

    }
    /// <summary>
    /// This class implement the algorithm to detect the obstruction and resolve it.
    /// </summary>
    public class Resolver
    {
        /// <summary>
        /// Revit Document.
        /// </summary>

        private Document m_rvtDoc;
        public double UpDownAngle { get; set; }    // �������� ����
        public double UpDownFreeSpaceHeight { get; set; } // �������� ��������


        EnumAvoidObstructionType m_AvoidObstructionType;
        EnumAvoidObstructionCheckPoint m_enumAOChectPoint;

        /// <summary>
        /// Detector to detect the obstructions.
        /// </summary>
        private Detector m_detector;

        PipingSystemType m_pipingSystemType;
        MechanicalSystemType m_ductSystemType;
        private List<KDCSIntersectorElement> m_lstObstruction = null;
        private List<KDCSIntersectorElement> m_lstAvoidance = null;
        //private List<SimpleSection> m_sections = null;

        public XYZ m_ptMidSectionOn { get; set; }



        /// <summary>
        /// Constructor, initialize all the fields of this class.
        /// </summary>
        /// <param name="data">Revit ExternalCommandData from external command entrance</param>
        public Resolver(Document doc)
        {


            m_rvtDoc = doc;
            m_detector = new Detector(doc);
            //m_sections = new List<SimpleSection>();


            FilteredElementCollector collector = new FilteredElementCollector(m_rvtDoc);
            var pipingSystemTypes = collector.OfClass(typeof(PipingSystemType)).ToElements();
            foreach (PipingSystemType pipingSystemType in pipingSystemTypes)
            {
                if (pipingSystemType.SystemClassification == MEPSystemClassification.SupplyHydronic ||
                pipingSystemType.SystemClassification == MEPSystemClassification.ReturnHydronic)
                {
                    m_pipingSystemType = pipingSystemType;
                    break;
                }
            }


            FilteredElementCollector collectorDuct = new FilteredElementCollector(m_rvtDoc);
            var ductSystemTypes = collectorDuct.OfClass(typeof(MechanicalSystemType)).ToElements();
            foreach (MechanicalSystemType ductSystemType in ductSystemTypes)
            {
                if (ductSystemType.SystemClassification == MEPSystemClassification.SupplyAir ||
                ductSystemType.SystemClassification == MEPSystemClassification.ReturnAir)
                {
                    m_ductSystemType = ductSystemType;
                    break;
                }
            }
        }

        public void SetElement(ref List<KDCSIntersectorElement> lstObstruction, ref List<KDCSIntersectorElement> lstAvoidance)
        {
            m_lstObstruction = lstObstruction;
            m_lstAvoidance = lstAvoidance;
        }

        public void GetElement(ref List<KDCSIntersectorElement> lstObstruction, ref List<KDCSIntersectorElement> lstAvoidance)
        {
            lstObstruction = m_lstObstruction;
            lstAvoidance = m_lstAvoidance;
        }




        public void SetAvoidObstructionType(EnumAvoidObstructionType obstructionType)
        {
            m_AvoidObstructionType = obstructionType;
        }

        /// <summary>
        /// Calculate the uniform perpendicular directions with inputting direction "dir".
        /// </summary>
        /// <param name="dir">Direction to calculate</param>
        /// <param name="count">How many perpendicular directions will be calculated</param>
        /// <returns>The calculated perpendicular directions with dir</returns>
        private List<Autodesk.Revit.DB.XYZ> PerpendicularDirs(Autodesk.Revit.DB.XYZ dir, int count)
        {
            List<Autodesk.Revit.DB.XYZ> dirs = new List<Autodesk.Revit.DB.XYZ>();
            Plane plane = Plane.CreateByNormalAndOrigin(dir, Autodesk.Revit.DB.XYZ.Zero);
            Arc arc = Arc.Create(plane, 1.0, 0, 6.2831);

            double delta = 1.0 / (double)count;
            for (int i = 1; i <= count; i++)
            {
                Autodesk.Revit.DB.XYZ pt = arc.Evaluate(delta * i, true);
                dirs.Add(pt);
            }

            return dirs;
        }





        /// <summary>
        /// �־��� ȸ�ǿ�� �������� �浹��Ҹ� ȸ���մϴ�.
        /// </summary>
        /// <param name="bendPipe">ȸ�� ���(����)</param>
        /// <param name="obstruction">�浹 ���(��ֹ�)</param>
        public void Bend(Pipe bendElement, XYZ hitPoint, ref List<KDCSIntersectorElement> lstObstruction)
        {

            // duct.LookupParameter(string name) 
            var paramLevel = bendElement.get_Parameter(BuiltInParameter.RBS_START_LEVEL_PARAM);
            var levelId = paramLevel.AsElementId();
            //var systemTypeId = m_pipingSystemType.Id;
            var systemTypeId = bendElement.MEPSystem.GetTypeId();


            // ���� Ȯ�� ���
            KDCSIntersectorElement intersectorElement = new KDCSIntersectorElement(bendElement);

            // ��ֹ� �浹 Ȯ��
            List<ReferenceWithContext> obstructionRefArr = new List<ReferenceWithContext>();
            foreach (KDCSIntersectorElement intersectorObstrion in lstObstruction)
            {
                m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.None;

                // ���
                List<ReferenceWithContext> obstructionReference = m_detector.Obstructions(intersectorElement.LineTop, intersectorObstrion);
                if (obstructionReference.Count > 0)
                {
                    foreach (var rwc in obstructionReference)
                    {
                        if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                    }
                    m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointTop;
                }
                else
                {
                    // �߽�
                    obstructionReference = m_detector.Obstructions(intersectorElement.Line, intersectorObstrion);
                    if (obstructionReference.Count > 0)
                    {
                        foreach (var rwc in obstructionReference)
                        {
                            if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                        }
                        m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointCenter;
                    }
                    else
                    {
                        // �ϴ�                              
                        obstructionReference = m_detector.Obstructions(intersectorElement.LineBottom, intersectorObstrion);
                        if (obstructionReference.Count > 0)
                        {
                            foreach (var rwc in obstructionReference)
                            {
                                if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                            }
                            m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointBottom;
                        }
                        else
                        {
                            // ����
                            obstructionReference = m_detector.Obstructions(intersectorElement.LineLeft, intersectorObstrion);
                            if (obstructionReference.Count > 0)
                            {
                                foreach (var rwc in obstructionReference)
                                {
                                    if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                                }
                                m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointLeft;
                            }
                            else
                            {
                                // ������
                                obstructionReference = m_detector.Obstructions(intersectorElement.LineRight, intersectorObstrion);
                                if (obstructionReference.Count > 0)
                                {
                                    foreach (var rwc in obstructionReference)
                                    {
                                        if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                                    }
                                    m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointLeft;
                                }
                            }
                        }
                    }
                }
            }

            if (obstructionRefArr.Count == 0) return;

            obstructionRefArr.Sort(m_detector.CompareReferencesWithContext);

            // ���� �ۼ�
            List<Section> sections = Section.BuildSections(m_rvtDoc, obstructionRefArr, intersectorElement.Line.Direction);


            if (sections.Count < 1) return;

     
            Section section1 = sections[0];
            Line line_ub1 = intersectorElement.Line;
            XYZ ptOnHit = line_ub1.Project(hitPoint).XYZPoint;
            XYZ mp_section = Util.Midpoint(section1.Start, section1.End);
            mp_section = line_ub1.Project(mp_section).XYZPoint;
            XYZ v1 = (mp_section - ptOnHit).Normalize();
            XYZ v2 = intersectorElement.Line.Direction;

            if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Up){
                if (v1.IsAlmostEqualTo(v2) == false) m_AvoidObstructionType = EnumAvoidObstructionType.AvoidUp_;

            }else if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Dn){
                if (v1.IsAlmostEqualTo(v2) == false) m_AvoidObstructionType = EnumAvoidObstructionType.AvoidDn_;
            }


            //List<Section> lstSectionTmp = new List<Section>();
            //lstSectionTmp.AddRange(sections);
            bool bAllMerge = false;
            if (m_AvoidObstructionType != EnumAvoidObstructionType.AvoidUpDn && m_AvoidObstructionType != EnumAvoidObstructionType.AvoidDnUp) bAllMerge = true;
            Plane base_section_plane = null;
            // ���ǿ� ������ 2�� �̻��� ���
            if (sections.Count > 1)
            {
                if (bAllMerge == true)
                {
                    XYZ s_sp = null;
                    XYZ s_ep = null;
                    if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Up || m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Dn)
                    {
                        // ���� ����
                        s_sp = sections[0].Start;
                        s_ep = sections[0].End;
                    }
                    else if (m_AvoidObstructionType == EnumAvoidObstructionType.AvoidUp_ || m_AvoidObstructionType == EnumAvoidObstructionType.AvoidDn_)
                    {
                        // �� ����
                        s_sp = sections[sections.Count - 1].Start;
                        s_ep = sections[sections.Count - 1].End;

                    }
                    if (s_sp != null && s_ep != null)
                    {
                        base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(s_sp, s_ep));
                    }
                }

                
                


                for (int i = sections.Count - 2; i >= 0; i--)
                {
                    Autodesk.Revit.DB.XYZ detal = sections[i].End - sections[i + 1].Start;
                    SetInterSectorElement(sections[i]);
                    SetInterSectorElement(sections[i+1]);
                    sections[i].BasePlane = base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i].Start, sections[i].End));
                    sections[i + 1].BasePlane = base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i + 1].Start, sections[i + 1].End));

                    double dstOffset1 = 0d;
                    double dstOffset2 = 0d;
                    base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i].Start, sections[i].End));
                    sections[i].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[i]));
                    FindRoute(bendElement, sections[i], base_section_plane, ref dstOffset1);
                    sections[i + 1].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[i + 1]));
                    FindRoute(bendElement, sections[i + 1], base_section_plane, ref dstOffset2);
                    base_section_plane = null;
                    // ���� ���ǰ� ���� ���ǰ��� �Ÿ��� �ʹ� ª�� ��� �����Ѵ�.
                    double radUpdownAng = Util.DTR(UpDownAngle);  // �������� ����
                    double r1 = Math.Max(dstOffset1, dstOffset2) / Math.Sin(radUpdownAng);
                    double x_offset = r1 * Math.Cos(radUpdownAng);
                    

                    if (detal.GetLength() < (x_offset * 2d + bendElement.Diameter*4.0) || bAllMerge)
                    {
                        if (sections[i].IsMerged == false)
                        {
                            sections[i].IsMerged = true;
                            // ���յ� ������ ���� ���ǿ� �߰�
                            sections[i].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[i + 1]));
                            sections[i].BasePlane = base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i].Start, sections[i].End));
                        }
                        sections[i].Refs.AddRange(sections[i + 1].Refs);
                        sections.RemoveAt(i + 1);
                    }
                }
            }
            else
            {
                if (sections.Count > 0)
                {
                    base_section_plane = null;
                    sections[0].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[0]));
                    sections[0].BasePlane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[0].Start, sections[0].End));
                    SetInterSectorElement(sections[0]); //sections[0].InterSectorElement = new KDCSIntersectorElement(m_rvtDoc.GetElement(sections[0].Refs[0].GetReference().ElementId));
                }
                else return;

            }


            // �浹 ���Ǻ� ���� �۾�
            foreach (Section cur_section in sections)
            {
                Resolve(bendElement, cur_section);
            }



            // ����� ���带 �����ش�.
            for (int i = 1; i < sections.Count; i++)
            {
                // Get the end point from the previous section.
                Autodesk.Revit.DB.XYZ start = sections[i - 1].End1;

                // Get the start point from the current section.
                Autodesk.Revit.DB.XYZ end = sections[i].Start1;

                // Create a duct between two neighbor section.
                Pipe tmpPipe = Pipe.Create(m_rvtDoc, systemTypeId, bendElement.PipeType.Id, levelId, start, end);

                // Copy pipe's parameters values to tmpPipe.
                CopyParameters(bendElement, tmpPipe);


                // Create elbow fitting to connect previous section with tmpPipe.
                Connector conn1 = FindConnector(sections[i - 1].Pipes[2], start);
                Connector conn2 = FindConnector(tmpPipe, start);

                if (conn1 != null && conn2 != null)
                {
                    FamilyInstance fi = null;
                    try
                    {
                        fi = m_rvtDoc.Create.NewElbowFitting(conn1, conn2);
                    }
                    catch (Exception ex) { string strmsg = ex.Message; }
                }

                // Create elbow fitting to connect current section with tmpPipe.
                Connector conn3 = FindConnector(sections[i].Pipes[0], end);
                Connector conn4 = FindConnector(tmpPipe, end);
                if (conn3 != null && conn4 != null)
                {
                    FamilyInstance f2 = null;
                    try
                    {
                        f2 = m_rvtDoc.Create.NewElbowFitting(conn3, conn4);
                    }
                    catch (Exception ex) { string strmsg = ex.Message; }
                }
            }


            // ������ �����ʰ� ���� ����

            // Find two connectors which pipe's two ends connector connected to. 
            Connector startConn = FindConnectedTo(bendElement, intersectorElement.Line.GetEndPoint(0));
            Connector endConn = FindConnectedTo(bendElement, intersectorElement.Line.GetEndPoint(1));


            //  ������ ������ ó��
            //------------------------------------------------------------------------------------------------
            Pipe startPipe = null;
            if (null != startConn)
            {
                // Create a pipe between pipe's start connector and pipe's start section.
                startPipe = Pipe.Create(m_rvtDoc, bendElement.PipeType.Id, levelId, startConn, sections[0].Start1);
            }
            else
            {
                // Create a pipe between pipe's start point and pipe's start section.
                startPipe = Pipe.Create(m_rvtDoc, systemTypeId, bendElement.PipeType.Id, levelId, sections[0].Start1, intersectorElement.Line.GetEndPoint(0));
            }

            // Copy parameters from pipe to startPipe. 
            CopyParameters(bendElement, startPipe);
            
            // ���� ���� �߰�
            Connector connStart1 = FindConnector(startPipe, sections[0].Start1);
            Connector connStart2 = null;

            if (m_AvoidObstructionType != EnumAvoidObstructionType.AvoidDn_ && m_AvoidObstructionType != EnumAvoidObstructionType.AvoidUp_)
            {
                connStart2 = FindConnector(sections[0].Pipes[0], sections[0].Start1);
            }

            int count = sections.Count;
            FamilyInstance fii = null;
            if (connStart1 != null && connStart2 != null)
            {
                try
                {
                    fii = m_rvtDoc.Create.NewElbowFitting(connStart1, connStart2);
                }
                catch (Exception ex) { string strmsg = ex.Message; }
            }
            else if (connStart2 == null && startPipe != null)
            {
                // startPipe�?pipes[1]�??�이�?맞추�? ?�결?�다.
                var line1 = (sections[count - 1].Pipes[1].Location as LocationCurve).Curve as Line;
                var line2 = (startPipe.Location as LocationCurve).Curve as Line;

                XYZ translation = null;
                if (line1.GetEndPoint(0).DistanceTo(line2.GetEndPoint(0)) < line1.GetEndPoint(0).DistanceTo(line2.GetEndPoint(1)))
                {
                    translation = line1.GetEndPoint(0) - line2.GetEndPoint(0);
                }
                else
                {
                    translation = line1.GetEndPoint(0) - line2.GetEndPoint(1);
                }

                ElementTransformUtils.MoveElement(m_rvtDoc, startPipe.Id, translation);


                List<Element> lstElement2BeDeleted = new List<Element>();
                connStart1 = FindConnector(sections[count - 1].Pipes[1], line1.GetEndPoint(0));
                connStart2 = FindConnector(startPipe, line1.GetEndPoint(0));
                if (connStart1 != null && connStart2 != null)
                {

                    JoinPipeSegment(connStart1, ref connStart2, ref lstElement2BeDeleted);
                    foreach (var el in lstElement2BeDeleted)
                    {
                        m_rvtDoc.Delete(el.Id);
                    }
                }
            }

            //  ?�이???�쪽 처리
            //------------------------------------------------------------------------------------------------
            Pipe endPipe = null;
            if (null != endConn)
            {
                // Create a pipe between pipe's end connector and pipe's end section.
                endPipe = Pipe.Create(m_rvtDoc, bendElement.PipeType.Id, levelId, endConn, sections[count - 1].End1);
            }
            else
            {
                // Create a pipe between pipe's end point and pipe's end section.
                endPipe = Pipe.Create(m_rvtDoc, systemTypeId, bendElement.PipeType.Id, levelId, sections[count - 1].End1, intersectorElement.Line.GetEndPoint(1));
            }

            // Copy parameters from pipe to endPipe.
            CopyParameters(bendElement, endPipe);

            // ?�쪽 ?�보 추�?
            Connector connEnd1 = FindConnector(endPipe, sections[count - 1].End1);
            Connector connEnd2 = null;

            if (m_AvoidObstructionType != EnumAvoidObstructionType.Avoid_Dn && m_AvoidObstructionType != EnumAvoidObstructionType.Avoid_Up)
            {
                connEnd2 = FindConnector(sections[count - 1].Pipes[2], sections[count - 1].End1);
            }
            FamilyInstance fiii = null;

            if (connEnd1 != null && connEnd2 != null)
            {
                try
                {
                    fiii = m_rvtDoc.Create.NewElbowFitting(connEnd1, connEnd2);
                }
                catch (Exception ex) { string strmsg = ex.Message; }
            }
            else if (connEnd2 == null && endPipe != null)
            {
                // endDuct�?ducts[1]�??�이�?맞추�? ?�결?�다.
                var line1 = (sections[count - 1].Pipes[1].Location as LocationCurve).Curve as Line;
                var line2 = (endPipe.Location as LocationCurve).Curve as Line;

                XYZ translation = null;
                if (line1.GetEndPoint(1).DistanceTo(line2.GetEndPoint(0)) < line1.GetEndPoint(1).DistanceTo(line2.GetEndPoint(1)))
                {
                    translation = line1.GetEndPoint(1) - line2.GetEndPoint(0);
                }
                else
                {
                    translation = line1.GetEndPoint(1) - line2.GetEndPoint(1);
                }

                ElementTransformUtils.MoveElement(m_rvtDoc, endPipe.Id, translation);

                List<Element> lstElement2BeDeleted = new List<Element>();
                connEnd1 = FindConnector(sections[count - 1].Pipes[1], line1.GetEndPoint(1));
                connEnd2 = FindConnector(endPipe, line1.GetEndPoint(1));
                if (connEnd1 != null && connEnd2 != null)
                {
                    JoinPipeSegment(connEnd1, ref connEnd2, ref lstElement2BeDeleted);
                    foreach (var el in lstElement2BeDeleted)
                    {
                        m_rvtDoc.Delete(el.Id);
                    }
                }
            }


            m_rvtDoc.Delete(bendElement.Id);


        }




        /// <summary>
        /// Use Autodesk.Revit.DB.ElementId to get the corresponding element
        /// </summary>
        /// <param name="id">the element id value</param>
        /// <returns>the corresponding element</returns>
        Autodesk.Revit.DB.Element GetElementById(int id)
        {
            // Create a Autodesk.Revit.DB.ElementId data
            Autodesk.Revit.DB.ElementId elementId = new Autodesk.Revit.DB.ElementId(id);

            // Get the corresponding element
            return m_rvtDoc.GetElement(elementId);
        }

        SketchPlane GetSketchPlaneById(int id)
        {
            // First get the sketch plane by the giving element id.
            SketchPlane workPlane = GetElementById(id) as SketchPlane;
            if (null == workPlane)
            {
                throw new Exception("Don't have the work plane you select.");
            }
            return workPlane;
        }


        /// <summary>
        /// ���� ���� ���������� ���� 2���� ��Ʈ�� ���� �����Ͽ� �ϳ��� ��Ʈ ���׸�Ʈ�� ����� �ش�.
        /// </summary>
        /// <param name="cThis">���� ��Ʈ Ŀ����</param>
        /// <param name="cOther">����� ��Ʈ Ŀ����</param>
        /// <param name="lstElement2BeDeleted">������ ��Ʈ ���</param>
        private void JoinDuctSegment(Connector cThis, ref Connector cOther, ref List<Element> lstElement2BeDeleted)
        {
            Duct dct1 = cThis.Owner as Duct;
            Duct dct2 = cOther.Owner as Duct;
            XYZ p1, p2, p3, p4;

            bool bOk = false;
            // ��Ʈ ���� ����� ���� ��쿡�� �� ���� ��Ʈ ���׸�Ʈ�� �ϳ��� �����.
            if (cThis.Shape == cOther.Shape)
            {
                if (cThis.Shape == ConnectorProfileType.Round)
                {
                    if (dct1.Diameter == dct2.Diameter) bOk = true;
                }
                else if (cThis.Shape == ConnectorProfileType.Rectangular || cThis.Shape == ConnectorProfileType.Oval)
                {
                    if (dct1.Width == dct2.Width && dct1.Height == dct2.Height) bOk = true;
                }
            }
            if (bOk == true)
            {
                LocationCurve lineLoc1 = dct1.Location as LocationCurve;
                Line c1 = lineLoc1.Curve as Line;
                p1 = c1.GetEndPoint(0);
                p2 = c1.GetEndPoint(1);
                Line c2 = (dct2.Location as LocationCurve).Curve as Line;
                p3 = c2.GetEndPoint(0);
                p4 = c2.GetEndPoint(1);

                XYZ mp1 = Util.Midpoint(p1, p2);
                XYZ mp2 = Util.Midpoint(p3, p4);
                Line check_line = Line.CreateBound(mp1, mp2);

                bool bFlowDir = check_line.Direction.IsAlmostEqualTo(c1.Direction);
                XYZ dct1_sp = new XYZ();
                XYZ dct1_ep = new XYZ();

                if (bFlowDir)
                {
                    dct1_sp = Util.makeXYZ(check_line.Distance(p2) < 1e-9 ? p1 : p2);
                    dct1_ep = Util.makeXYZ(check_line.Distance(p3) < 1e-9 ? p4 : p3);

                }
                else
                {
                    dct1_sp = Util.makeXYZ(check_line.Distance(p4) < 1e-9 ? p3 : p4);
                    dct1_ep = Util.makeXYZ(check_line.Distance(p1) < 1e-9 ? p2 : p1);

                }

                if (bFlowDir)  // dct1->dct2
                {
                    Connector con_dct2ep = FindConnectedTo(dct2, dct1_ep);
                    lineLoc1.Curve = Line.CreateBound(dct1_sp, dct1_ep);
                    Connector con_dct1ep = FindConnector(dct1, dct1_ep);
                    if (con_dct2ep != null && con_dct1ep != null)
                    {
                        if (con_dct2ep.IsConnected)
                        {
                            con_dct1ep.ConnectTo(con_dct2ep);
                        }
                    }
                }
                else // dct2->dct1
                {
                    Connector con_dct2sp = FindConnectedTo(dct2, dct1_sp);
                    lineLoc1.Curve = Line.CreateBound(dct1_sp, dct1_ep);
                    Connector con_dct1sp = FindConnector(dct1, dct1_sp);
                    if (con_dct2sp != null && con_dct1sp != null)
                    {
                        if (con_dct2sp.IsConnected)
                        {
                            con_dct1sp.ConnectTo(con_dct2sp);
                        }
                    }

                }

                //PlumbingUtils.BreakCurve(
                //MechanicalUtils.BreakCurve(
                Util.ShortenCurve(dct2);
                lstElement2BeDeleted.Add(cOther.Owner);
                cOther = null;
            }
            else if (dct1 != null && dct2 == null)
            {
                LocationCurve lineLoc1 = dct1.Location as LocationCurve;
                Line c1 = lineLoc1.Curve as Line;
                p1 = c1.GetEndPoint(0);
                p2 = c1.GetEndPoint(1);
                if (cOther.Origin.DistanceTo(p1) < cOther.Origin.DistanceTo(p2)) lineLoc1.Curve = Line.CreateBound(cOther.Origin, p2);
                else lineLoc1.Curve = Line.CreateBound(p1, cOther.Origin);
            }
        }


        public void JoinPipeSegment(Connector cThis, ref Connector cOther, ref List<Element> lstElement2BeDeleted)
        {
            Pipe pip1 = cThis.Owner as Pipe;
            Pipe pip2 = cOther.Owner as Pipe;
            XYZ p1, p2, p3, p4;
            if (cThis.Radius == cOther.Radius)
            {

                LocationCurve lineLoc1 = pip1.Location as LocationCurve;
                Line c1 = lineLoc1.Curve as Line;
                p1 = c1.GetEndPoint(0);
                p2 = c1.GetEndPoint(1);
                Line c2 = (pip2.Location as LocationCurve).Curve as Line;
                p3 = c2.GetEndPoint(0);
                p4 = c2.GetEndPoint(1);


                XYZ mp1 = Util.Midpoint(p1, p2);
                XYZ mp2 = Util.Midpoint(p3, p4);
                Line check_line = Line.CreateBound(mp1, mp2);

                bool bFlowDir = check_line.Direction.IsAlmostEqualTo(c1.Direction);
                XYZ pip1_sp = new XYZ();
                XYZ pip1_ep = new XYZ();

                if (bFlowDir)
                {
                    pip1_sp = Util.makeXYZ(check_line.Distance(p2) < 1e-9 ? p1 : p2);
                    pip1_ep = Util.makeXYZ(check_line.Distance(p3) < 1e-9 ? p4 : p3);

                }
                else
                {
                    pip1_sp = Util.makeXYZ(check_line.Distance(p4) < 1e-9 ? p3 : p4);
                    pip1_ep = Util.makeXYZ(check_line.Distance(p1) < 1e-9 ? p2 : p1);

                }


                if (bFlowDir)  // pip1->pip2
                {
                    Connector con_dct2ep = FindConnectedTo(pip2, pip1_ep);
                    lineLoc1.Curve = Line.CreateBound(pip1_sp, pip1_ep);
                    Connector con_dct1ep = FindConnector(pip1, pip1_ep);
                    if (con_dct2ep != null && con_dct1ep != null)
                    {
                        if (con_dct2ep.IsConnected)
                        {
                            con_dct1ep.ConnectTo(con_dct2ep);
                        }
                    }
                }
                else // pip2->dct1
                {
                    Connector con_dct2sp = FindConnectedTo(pip2, pip1_sp);
                    lineLoc1.Curve = Line.CreateBound(pip1_sp, pip1_ep);
                    Connector con_dct1sp = FindConnector(pip1, pip1_sp);
                    if (con_dct2sp != null && con_dct1sp != null)
                    {
                        if (con_dct2sp.IsConnected)
                        {
                            con_dct1sp.ConnectTo(con_dct2sp);
                        }
                    }

                }

                //PlumbingUtils.BreakCurve(
                //MechanicalUtils.BreakCurve(
                Util.ShortenCurve(pip2);
                lstElement2BeDeleted.Add(cOther.Owner);
                cOther = null;
            }
        }


        /// <summary>
        /// ���� ���� ���������� ���� 2���� ���̺�Ʈ���̸� ���� �����Ͽ� �ϳ��� ��Ʈ ���׸�Ʈ�� ����� �ش�.
        /// </summary>
        /// <param name="cThis">���� ��Ʈ Ŀ����</param>
        /// <param name="cOther">����� ��Ʈ Ŀ����</param>
        /// <param name="lstElement2BeDeleted">������ ��Ʈ ���</param>
        private void JoinCableTraySegment(Connector cThis, ref Connector cOther, ref List<Element> lstElement2BeDeleted)
        {
            CableTray dct1 = cThis.Owner as CableTray;
            CableTray dct2 = cOther.Owner as CableTray;
            XYZ p1, p2, p3, p4;

            bool bOk = false;
            // ��Ʈ ���� ����� ���� ��쿡�� �� ���� ��Ʈ ���׸�Ʈ�� �ϳ��� �����.
            if (cThis.Shape == cOther.Shape)
            {
                if (cThis.Shape == ConnectorProfileType.Round)
                {
                    if (dct1.Diameter == dct2.Diameter) bOk = true;
                }
                else if (cThis.Shape == ConnectorProfileType.Rectangular || cThis.Shape == ConnectorProfileType.Oval)
                {
                    if (dct1.Width == dct2.Width && dct1.Height == dct2.Height) bOk = true;
                }
            }
            if (bOk == true)
            {
                LocationCurve lineLoc1 = dct1.Location as LocationCurve;
                Line c1 = lineLoc1.Curve as Line;
                p1 = c1.GetEndPoint(0);
                p2 = c1.GetEndPoint(1);
                Line c2 = (dct2.Location as LocationCurve).Curve as Line;
                p3 = c2.GetEndPoint(0);
                p4 = c2.GetEndPoint(1);

                XYZ mp1 = Util.Midpoint(p1, p2);
                XYZ mp2 = Util.Midpoint(p3, p4);
                Line check_line = Line.CreateBound(mp1, mp2);

                bool bFlowDir = check_line.Direction.IsAlmostEqualTo(c1.Direction);
                XYZ dct1_sp = new XYZ();
                XYZ dct1_ep = new XYZ();

                if (bFlowDir)
                {
                    dct1_sp = Util.makeXYZ(check_line.Distance(p2) < 1e-9 ? p1 : p2);
                    dct1_ep = Util.makeXYZ(check_line.Distance(p3) < 1e-9 ? p4 : p3);

                }
                else
                {
                    dct1_sp = Util.makeXYZ(check_line.Distance(p4) < 1e-9 ? p3 : p4);
                    dct1_ep = Util.makeXYZ(check_line.Distance(p1) < 1e-9 ? p2 : p1);

                }

                if (bFlowDir)  // dct1->dct2
                {
                    Connector con_dct2ep = FindConnectedTo(dct2, dct1_ep);
                    lineLoc1.Curve = Line.CreateBound(dct1_sp, dct1_ep);
                    Connector con_dct1ep = FindConnector(dct1, dct1_ep);
                    if (con_dct2ep != null && con_dct1ep != null)
                    {
                        if (con_dct2ep.IsConnected)
                        {
                            con_dct1ep.ConnectTo(con_dct2ep);
                        }
                    }
                }
                else // dct2->dct1
                {
                    Connector con_dct2sp = FindConnectedTo(dct2, dct1_sp);
                    lineLoc1.Curve = Line.CreateBound(dct1_sp, dct1_ep);
                    Connector con_dct1sp = FindConnector(dct1, dct1_sp);
                    if (con_dct2sp != null && con_dct1sp != null)
                    {
                        if (con_dct2sp.IsConnected)
                        {
                            con_dct1sp.ConnectTo(con_dct2sp);
                        }
                    }

                }

                //PlumbingUtils.BreakCurve(
                //MechanicalUtils.BreakCurve(
                Util.ShortenCurve(dct2);
                lstElement2BeDeleted.Add(cOther.Owner);
                cOther = null;
            }
            else if (dct1 != null && dct2 == null)
            {
                LocationCurve lineLoc1 = dct1.Location as LocationCurve;
                Line c1 = lineLoc1.Curve as Line;
                p1 = c1.GetEndPoint(0);
                p2 = c1.GetEndPoint(1);
                if (cOther.Origin.DistanceTo(p1) < cOther.Origin.DistanceTo(p2)) lineLoc1.Curve = Line.CreateBound(cOther.Origin, p2);
                else lineLoc1.Curve = Line.CreateBound(p1, cOther.Origin);
            }
        }


        private void JoinConduitSegment(Connector cThis, ref Connector cOther, ref List<Element> lstElement2BeDeleted)
        {
            Conduit conduit1 = cThis.Owner as Conduit;
            Conduit conduit2 = cOther.Owner as Conduit;
            XYZ p1, p2, p3, p4;
            if (cThis.Radius == cOther.Radius)
            {

                LocationCurve lineLoc1 = conduit1.Location as LocationCurve;
                Line c1 = lineLoc1.Curve as Line;
                p1 = c1.GetEndPoint(0);
                p2 = c1.GetEndPoint(1);
                Line c2 = (conduit2.Location as LocationCurve).Curve as Line;
                p3 = c2.GetEndPoint(0);
                p4 = c2.GetEndPoint(1);


                XYZ mp1 = Util.Midpoint(p1, p2);
                XYZ mp2 = Util.Midpoint(p3, p4);
                Line check_line = Line.CreateBound(mp1, mp2);

                bool bFlowDir = check_line.Direction.IsAlmostEqualTo(c1.Direction);
                XYZ conduit1_sp = new XYZ();
                XYZ conduit1_ep = new XYZ();

                if (bFlowDir)
                {
                    conduit1_sp = Util.makeXYZ(check_line.Distance(p2) < 1e-9 ? p1 : p2);
                    conduit1_ep = Util.makeXYZ(check_line.Distance(p3) < 1e-9 ? p4 : p3);

                }
                else
                {
                    conduit1_sp = Util.makeXYZ(check_line.Distance(p4) < 1e-9 ? p3 : p4);
                    conduit1_ep = Util.makeXYZ(check_line.Distance(p1) < 1e-9 ? p2 : p1);

                }


                if (bFlowDir)  // conduit1->conduit2
                {
                    Connector con_dct2ep = FindConnectedTo(conduit2, conduit1_ep);
                    lineLoc1.Curve = Line.CreateBound(conduit1_sp, conduit1_ep);
                    Connector con_dct1ep = FindConnector(conduit1, conduit1_ep);
                    if (con_dct2ep != null && con_dct1ep != null)
                    {
                        if (con_dct2ep.IsConnected)
                        {
                            con_dct1ep.ConnectTo(con_dct2ep);
                        }
                    }
                }
                else // conduit2->dct1
                {
                    Connector con_dct2sp = FindConnectedTo(conduit2, conduit1_sp);
                    lineLoc1.Curve = Line.CreateBound(conduit1_sp, conduit1_ep);
                    Connector con_dct1sp = FindConnector(conduit1, conduit1_sp);
                    if (con_dct2sp != null && con_dct1sp != null)
                    {
                        if (con_dct2sp.IsConnected)
                        {
                            con_dct1sp.ConnectTo(con_dct2sp);
                        }
                    }

                }

                //PlumbingUtils.BreakCurve(
                //MechanicalUtils.BreakCurve(
                Util.ShortenCurve(conduit2);
                lstElement2BeDeleted.Add(cOther.Owner);
                cOther = null;
            }
        }

        private void SetInterSectorElement(Section section)
        {
            var linkedElementId = section.Refs[0].GetReference().LinkedElementId;
            var elementId = section.Refs[0].GetReference().ElementId;
            Element elm = null;
            if (linkedElementId.IntegerValue != -1)
            {
                Element elLink = m_rvtDoc.GetElement(elementId);
                var revitLinkedInstance = elLink as RevitLinkInstance;
                Document doc = revitLinkedInstance.GetLinkDocument();
                elm = doc.GetElement(linkedElementId);               
                section.InterSectorElement = new KDCSIntersectorElement(elm, null, doc);
                section.InterSectorElement.SetRevitLinkInstance(revitLinkedInstance);

            }
            else
            {
                elm = m_rvtDoc.GetElement(elementId);
                section.InterSectorElement = new KDCSIntersectorElement(elm);
            }    
        }

        private Element GetElement(Section section)
        {
            var linkedElementId = section.Refs[0].GetReference().LinkedElementId;
            var elementId = section.Refs[0].GetReference().ElementId;
            Element elm = null;
            if (linkedElementId.IntegerValue != -1)
            {
                var revitLinkedInstance = m_rvtDoc.GetElement(elementId) as RevitLinkInstance;
                Document doc = revitLinkedInstance.GetLinkDocument();
                elm = doc.GetElement(linkedElementId);
               
            }
            else
            {
                elm = m_rvtDoc.GetElement(elementId);
            }
            return elm;
        }



        /// <summary>
        /// �־��� ȸ�ǿ�� ��Ʈ�� �浹��Ҹ� ȸ���մϴ�.
        /// </summary>
        /// <param name="bendDuct">ȸ�� ���(����)</param>
        /// <param name="obstruction">�浹 ���(��ֹ�)</param>
        public void Bend(Duct bendElement, XYZ hitPoint, ref List<KDCSIntersectorElement> lstObstruction)
        {

            // duct.LookupParameter(string name) 
            var paramLevel = bendElement.get_Parameter(BuiltInParameter.RBS_START_LEVEL_PARAM);
            var levelId = paramLevel.AsElementId();
            //var systemTypeId = m_ductSystemType.Id;
            var systemTypeId = bendElement.MEPSystem.GetTypeId();


            // ���� Ȯ�� ���
            KDCSIntersectorElement intersectorElement = new KDCSIntersectorElement(bendElement);

            // ��ֹ� �浹 Ȯ��
            List<ReferenceWithContext> obstructionRefArr = new List<ReferenceWithContext>();
            foreach (KDCSIntersectorElement intersectorObstrion in lstObstruction)
            {
                m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.None;
                // ���
                List<ReferenceWithContext> obstructionReference = m_detector.Obstructions(intersectorElement.LineTop, intersectorObstrion);
                if (obstructionReference.Count > 0)
                {
                    foreach (var rwc in obstructionReference)
                    {
                        if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                    }
                    m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointTop;
                }
                else
                {
                    // �߽�
                    obstructionReference = m_detector.Obstructions(intersectorElement.Line, intersectorObstrion);
                    if (obstructionReference.Count > 0)
                    {
                        foreach (var rwc in obstructionReference)
                        {
                            if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                        }
                        m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointCenter;
                    }
                    else
                    {
                        // �ϴ�
                        obstructionReference = m_detector.Obstructions(intersectorElement.LineBottom, intersectorObstrion);
                        if (obstructionReference.Count > 0)
                        {
                            foreach (var rwc in obstructionReference)
                            {
                                if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                            }
                            m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointBottom;
                        }
                        else
                        {
                            // ����
                            obstructionReference = m_detector.Obstructions(intersectorElement.LineLeft, intersectorObstrion);
                            if (obstructionReference.Count > 0)
                            {
                                foreach (var rwc in obstructionReference)
                                {
                                    if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                                }
                                m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointLeft;
                            }
                            else
                            {
                                // ������
                                obstructionReference = m_detector.Obstructions(intersectorElement.LineRight, intersectorObstrion);
                                if (obstructionReference.Count > 0)
                                {
                                    foreach (var rwc in obstructionReference)
                                    {
                                        if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                                    }
                                    m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointLeft;
                                }

                            }
                        }
                    }
                }
            }

            if (obstructionRefArr.Count == 0) return;
            obstructionRefArr.Sort(m_detector.CompareReferencesWithContext);

            // ���� �ۼ�
            List<Section> sections = Section.BuildSections(m_rvtDoc, obstructionRefArr, intersectorElement.Line.Direction);

            if (sections.Count < 1) return;

            Section section1 = sections[0];
            Line line_ub1 = intersectorElement.Line;
            XYZ ptOnHit = line_ub1.Project(hitPoint).XYZPoint;
            XYZ mp_section = Util.Midpoint(section1.Start, section1.End);
            mp_section = line_ub1.Project(mp_section).XYZPoint;
            XYZ v1 = (mp_section - ptOnHit).Normalize();
            XYZ v2 = intersectorElement.Line.Direction;

            if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Up)
            {
                if (v1.IsAlmostEqualTo(v2) == false) m_AvoidObstructionType = EnumAvoidObstructionType.AvoidUp_;

            }
            else if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Dn)
            {
                if (v1.IsAlmostEqualTo(v2) == false) m_AvoidObstructionType = EnumAvoidObstructionType.AvoidDn_;
            }


            //List<Section> lstSectionTmp = new List<Section>();
            //lstSectionTmp.AddRange(sections);
            bool bAllMerge = false;
            if (m_AvoidObstructionType != EnumAvoidObstructionType.AvoidUpDn && m_AvoidObstructionType != EnumAvoidObstructionType.AvoidDnUp) bAllMerge = true;
            Plane base_section_plane = null;
            // ���ǿ� ������ 2�� �̻��� ���
            if (sections.Count > 1)
            {
                if (bAllMerge == true)
                {
                    XYZ s_sp = null;
                    XYZ s_ep = null;
                    if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Up || m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Dn)
                    {
                        // ���� ����
                        s_sp = sections[0].Start;
                        s_ep = sections[0].End;
                    }
                    else if (m_AvoidObstructionType == EnumAvoidObstructionType.AvoidUp_ || m_AvoidObstructionType == EnumAvoidObstructionType.AvoidDn_)
                    {
                        // �� ����
                        s_sp = sections[sections.Count - 1].Start;
                        s_ep = sections[sections.Count - 1].End;

                    }
                    if (s_sp != null && s_ep != null)
                    {
                        base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(s_sp, s_ep));
                    }


                }

                // Merge the neighbor sections if the distance of them is too close.
                for (int i = sections.Count - 2; i >= 0; i--)
                {
                    Autodesk.Revit.DB.XYZ detal = sections[i].End - sections[i + 1].Start;
                    SetInterSectorElement(sections[i]);
                    SetInterSectorElement(sections[i+1]);
                    sections[i].BasePlane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i].Start, sections[i].End));
                    sections[i + 1].BasePlane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i + 1].Start, sections[i + 1].End));


                    double dstOffset1 = 0d;
                    double dstOffset2 = 0d;
                    base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i].Start, sections[i].End));
                    sections[i].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[i]));
                    FindRoute(bendElement, sections[i], base_section_plane, ref dstOffset1);
                    sections[i + 1].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[i+1]));
                    FindRoute(bendElement, sections[i + 1], base_section_plane, ref dstOffset2);
                    base_section_plane = null;
                    if (detal.GetLength() < (Math.Max(dstOffset1, dstOffset2) * 2d + bendElement.Height * 3d) || bAllMerge)
                    {
                        if (sections[i].IsMerged == false)
                        {
                            sections[i].IsMerged = true;
                            // ���յ� ������ ���� ���ǿ� �߰�
                            sections[i].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[i+1]));
                            sections[i].BasePlane = base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i].Start, sections[i].End));
                        }
                        sections[i].Refs.AddRange(sections[i + 1].Refs);
                        sections.RemoveAt(i + 1);
                    }
                }
            }
            else
            {
     
                if (sections.Count > 0)
                {
                    base_section_plane = null;
                    sections[0].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[0]));
                    sections[0].BasePlane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[0].Start, sections[0].End));
                    SetInterSectorElement(sections[0]);                                      
                }
                else return;

            }


            // �浹 ���Ǻ� ���� �۾�
            foreach (Section cur_section in sections)
            {
                Resolve(bendElement, cur_section);
            }


            // ����� ���带 �����ش�.

            for (int i = 1; i < sections.Count; i++)
            {
                // Get the end point from the previous section.
                Autodesk.Revit.DB.XYZ start = sections[i - 1].End1;

                // Get the start point from the current section.
                Autodesk.Revit.DB.XYZ end = sections[i].Start1;

                // Create a duct between two neighbor section.
                Duct tmpDuct = Duct.Create(m_rvtDoc, systemTypeId, bendElement.DuctType.Id, levelId, start, end);

                // Copy pipe's parameters values to tmpPipe.
                CopyParameters(bendElement, tmpDuct);


                // Create elbow fitting to connect previous section with tmpPipe.
                Connector conn1 = FindConnector(sections[i - 1].Ducts[2], start);
                Connector conn2 = FindConnector(tmpDuct, start);

                if (conn1 != null && conn2 != null)
                {
                    FamilyInstance fi = null;
                    try
                    {
                        fi = m_rvtDoc.Create.NewElbowFitting(conn1, conn2);
                    }
                    catch (Exception ex) { string strmsg = ex.Message; }
                }

                // Create elbow fitting to connect current section with tmpPipe.
                Connector conn3 = FindConnector(sections[i].Ducts[0], end);
                Connector conn4 = FindConnector(tmpDuct, end);
                if (conn3 != null && conn4 != null)
                {
                    FamilyInstance f2 = null;
                    try
                    {
                        f2 = m_rvtDoc.Create.NewElbowFitting(conn3, conn4);
                    }
                    catch (Exception ex) { string strmsg = ex.Message; }
                }
            }

            // ��Ʈ �����ʰ� ���� ����

            // Find two connectors which pipe's two ends connector connected to. 
            Connector startConn = FindConnectedTo(bendElement, intersectorElement.Line.GetEndPoint(0));
            Connector endConn = FindConnectedTo(bendElement, intersectorElement.Line.GetEndPoint(1));


            //  ��Ʈ ������ ó��
            //------------------------------------------------------------------------------------------------
            Duct startDuct = null;
            if (null != startConn)
            {
                // Create a pipe between pipe's start connector and pipe's start section.
                startDuct = Duct.Create(m_rvtDoc, bendElement.DuctType.Id, levelId, startConn, sections[0].Start1);
            }
            else
            {
                // Create a pipe between pipe's start point and pipe's start section.
                startDuct = Duct.Create(m_rvtDoc, systemTypeId, bendElement.DuctType.Id, levelId, sections[0].Start1, intersectorElement.Line.GetEndPoint(0));
            }

            // Copy parameters from pipe to startPipe. 
            CopyParameters(bendElement, startDuct);
            // ������ ���� �߰�
            Connector connStart1 = FindConnector(startDuct, sections[0].Start1);
            Connector connStart2 = null;

            if (m_AvoidObstructionType != EnumAvoidObstructionType.AvoidDn_ && m_AvoidObstructionType != EnumAvoidObstructionType.AvoidUp_)
            {
                connStart2 = FindConnector(sections[0].Ducts[0], sections[0].Start1);
            }

            int count = sections.Count;
            FamilyInstance fii = null;
            if (connStart1 != null && connStart2 != null)
            {
                try
                {
                    fii = m_rvtDoc.Create.NewElbowFitting(connStart1, connStart2);
                }
                catch (Exception ex) { string strmsg = ex.Message; }
            }
            else if (connStart2 == null && startDuct != null)
            {
                // startDuct�� ducts[1]�� ���̸� ���߰�, �����Ѵ�.
                var line1 = (sections[count - 1].Ducts[1].Location as LocationCurve).Curve as Line;
                var line2 = (startDuct.Location as LocationCurve).Curve as Line;

                XYZ translation = null;
                if (line1.GetEndPoint(0).DistanceTo(line2.GetEndPoint(0)) < line1.GetEndPoint(0).DistanceTo(line2.GetEndPoint(1)))
                {
                    translation = line1.GetEndPoint(0) - line2.GetEndPoint(0);
                }
                else
                {
                    translation = line1.GetEndPoint(0) - line2.GetEndPoint(1);
                }

                ElementTransformUtils.MoveElement(m_rvtDoc, startDuct.Id, translation);


                List<Element> lstElement2BeDeleted = new List<Element>();
                connStart1 = FindConnector(sections[count - 1].Ducts[1], line1.GetEndPoint(0));
                connStart2 = FindConnector(startDuct, line1.GetEndPoint(0));
                if (connStart1 != null && connStart2 != null)
                {

                    JoinDuctSegment(connStart1, ref connStart2, ref lstElement2BeDeleted);
                    foreach (var el in lstElement2BeDeleted)
                    {
                        m_rvtDoc.Delete(el.Id);
                    }
                }
            }




            //  ��Ʈ ���� ó��
            //------------------------------------------------------------------------------------------------
            Duct endDuct = null;
            if (null != endConn)
            {
                // Create a pipe between pipe's end connector and pipe's end section.
                endDuct = Duct.Create(m_rvtDoc, bendElement.DuctType.Id, levelId, endConn, sections[count - 1].End1);
            }
            else
            {
                // Create a pipe between pipe's end point and pipe's end section.
                endDuct = Duct.Create(m_rvtDoc, systemTypeId, bendElement.DuctType.Id, levelId, sections[count - 1].End1, intersectorElement.Line.GetEndPoint(1));
            }

            // Copy parameters from pipe to endPipe.
            CopyParameters(bendElement, endDuct);

            // ���� ���� �߰�
            Connector connEnd1 = FindConnector(endDuct, sections[count - 1].End1);
            Connector connEnd2 = null;

            if (m_AvoidObstructionType != EnumAvoidObstructionType.Avoid_Dn && m_AvoidObstructionType != EnumAvoidObstructionType.Avoid_Up)
            {
                connEnd2 = FindConnector(sections[count - 1].Ducts[2], sections[count - 1].End1);
            }
            FamilyInstance fiii = null;

            if (connEnd1 != null && connEnd2 != null)
            {
                try
                {
                    fiii = m_rvtDoc.Create.NewElbowFitting(connEnd1, connEnd2);
                }
                catch (Exception ex) { string strmsg = ex.Message; }
            }
            else if (connEnd2 == null && endDuct != null)
            {
                // endDuct�� ducts[1]�� ���̸� ���߰�, �����Ѵ�.
                var line1 = (sections[count - 1].Ducts[1].Location as LocationCurve).Curve as Line;
                var line2 = (endDuct.Location as LocationCurve).Curve as Line;

                XYZ translation = null;
                if (line1.GetEndPoint(1).DistanceTo(line2.GetEndPoint(0)) < line1.GetEndPoint(1).DistanceTo(line2.GetEndPoint(1)))
                {
                    translation = line1.GetEndPoint(1) - line2.GetEndPoint(0);
                }
                else
                {
                    translation = line1.GetEndPoint(1) - line2.GetEndPoint(1);
                }

                ElementTransformUtils.MoveElement(m_rvtDoc, endDuct.Id, translation);

                List<Element> lstElement2BeDeleted = new List<Element>();
                connEnd1 = FindConnector(sections[count - 1].Ducts[1], line1.GetEndPoint(1));
                connEnd2 = FindConnector(endDuct, line1.GetEndPoint(1));
                if (connEnd1 != null && connEnd2 != null)
                {
                    JoinDuctSegment(connEnd1, ref connEnd2, ref lstElement2BeDeleted);
                    foreach (var el in lstElement2BeDeleted)
                    {
                        m_rvtDoc.Delete(el.Id);
                    }
                }
            }


            m_rvtDoc.Delete(bendElement.Id);

        }


        /// <summary>
        /// �־��� ȸ�ǿ�� ���̺�Ʈ���̰� �浹��Ҹ� ȸ���մϴ�.
        /// </summary>
        /// <param name="bendElement">ȸ�� ���(����)</param>
        /// <param name="lstObstruction">�浹���(��ֹ�)</param>
        public void Bend(CableTray bendElement, XYZ hitPoint, ref List<KDCSIntersectorElement> lstObstruction)
        {

            // duct.LookupParameter(string name) 
            var paramLevel = bendElement.get_Parameter(BuiltInParameter.RBS_START_LEVEL_PARAM);
            var levelId = paramLevel.AsElementId();



            // ��ֹ� �浹 Ȯ��
            KDCSIntersectorElement intersectorElement = new KDCSIntersectorElement(bendElement);

            // ?�애�?충돌 ?�인
            List<ReferenceWithContext> obstructionRefArr = new List<ReferenceWithContext>();
            foreach (KDCSIntersectorElement intersectorObstrion in lstObstruction)
            {
                m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.None;
                // ���
                List<ReferenceWithContext> obstructionReference = m_detector.Obstructions(intersectorElement.LineTop, intersectorObstrion);
                if (obstructionReference.Count > 0)
                {
                    foreach (var rwc in obstructionReference)
                    {
                        if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                    }
                    m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointTop;
                }
                else
                {
                    // �߽�
                    obstructionReference = m_detector.Obstructions(intersectorElement.Line, intersectorObstrion);
                    if (obstructionReference.Count > 0)
                    {
                        foreach (var rwc in obstructionReference)
                        {
                            if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                        }
                        m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointCenter;
                    }
                    else
                    {
                        // �ϴ�
                        obstructionReference = m_detector.Obstructions(intersectorElement.LineBottom, intersectorObstrion);
                        if (obstructionReference.Count > 0)
                        {
                            foreach (var rwc in obstructionReference)
                            {
                                if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                            }
                            m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointBottom;
                        }
                        else
                        {
                            // ����
                            obstructionReference = m_detector.Obstructions(intersectorElement.LineLeft, intersectorObstrion);
                            if (obstructionReference.Count > 0)
                            {
                                foreach (var rwc in obstructionReference)
                                {
                                    if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                                }
                                m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointLeft;
                            }
                            else
                            {
                                // ������
                                obstructionReference = m_detector.Obstructions(intersectorElement.LineRight, intersectorObstrion);
                                if (obstructionReference.Count > 0)
                                {
                                    foreach (var rwc in obstructionReference)
                                    {
                                        if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                                    }
                                    m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointLeft;
                                }

                            }
                        }
                    }
                }
            }

            if (obstructionRefArr.Count == 0) return;
            obstructionRefArr.Sort(m_detector.CompareReferencesWithContext);

            // ���� �ۼ�
            List<Section> sections = Section.BuildSections(m_rvtDoc, obstructionRefArr, intersectorElement.Line.Direction);

            if (sections.Count < 1) return;

            Section section1 = sections[0];
            Line line_ub1 = intersectorElement.Line;
            XYZ ptOnHit = line_ub1.Project(hitPoint).XYZPoint;
            XYZ mp_section = Util.Midpoint(section1.Start, section1.End);
            mp_section = line_ub1.Project(mp_section).XYZPoint;
            XYZ v1 = (mp_section - ptOnHit).Normalize();
            XYZ v2 = intersectorElement.Line.Direction;

            if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Up)
            {
                if (v1.IsAlmostEqualTo(v2) == false) m_AvoidObstructionType = EnumAvoidObstructionType.AvoidUp_;

            }
            else if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Dn)
            {
                if (v1.IsAlmostEqualTo(v2) == false) m_AvoidObstructionType = EnumAvoidObstructionType.AvoidDn_;
            }



            bool bAllMerge = false;
            if (m_AvoidObstructionType != EnumAvoidObstructionType.AvoidUpDn && m_AvoidObstructionType != EnumAvoidObstructionType.AvoidDnUp) bAllMerge = true;
            Plane base_section_plane = null;

            // ���ǿ� ������ 2�� �̻��� ���
            if (sections.Count > 1)
            {
                if (bAllMerge == true)
                {
                    XYZ s_sp = null;
                    XYZ s_ep = null;
                    if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Up || m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Dn)
                    {
                        // ���� ����
                        s_sp = sections[0].Start;
                        s_ep = sections[0].End;
                    }
                    else if (m_AvoidObstructionType == EnumAvoidObstructionType.AvoidUp_ || m_AvoidObstructionType == EnumAvoidObstructionType.AvoidDn_)
                    {
                        // �� ����
                        s_sp = sections[sections.Count - 1].Start;
                        s_ep = sections[sections.Count - 1].End;

                    }
                    if (s_sp != null && s_ep != null)
                    {
                        base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(s_sp, s_ep));
                    }


                }

                // Merge the neighbor sections if the distance of them is too close.
                for (int i = sections.Count - 2; i >= 0; i--)
                {
                    Autodesk.Revit.DB.XYZ detal = sections[i].End - sections[i + 1].Start;
                    SetInterSectorElement(sections[i]);
                    SetInterSectorElement(sections[i + 1]);
                    sections[i].BasePlane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i].Start, sections[i].End));
                    sections[i + 1].BasePlane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i + 1].Start, sections[i + 1].End));


                    double dstOffset1 = 0d;
                    double dstOffset2 = 0d;
                    base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i].Start, sections[i].End));
                    sections[i].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[i]));
                    FindRoute(bendElement, sections[i], base_section_plane, ref dstOffset1);
                    sections[i + 1].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[i + 1]));
                    FindRoute(bendElement, sections[i + 1], base_section_plane, ref dstOffset2);
                    
                    base_section_plane = null;
                    // ���� ���ǰ� ���� ���� ���� �Ÿ�(1500mm(4.92125984ft))�� �ʹ� ª�� ��� ����
                    if (detal.GetLength() < 4.92125984 || bAllMerge)
                    {
                        if (sections[i].IsMerged == false)
                        {
                            sections[i].IsMerged = true;
                            // ���յ� ������ ���� ���ǿ� �߰�
                            sections[i].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[i + 1]));
                            sections[i].BasePlane = base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i].Start, sections[i].End));
                        }
                        sections[i].Refs.AddRange(sections[i + 1].Refs);
                        sections.RemoveAt(i + 1);
                    }
                }
            }
            else
            {
                if (sections.Count > 0)
                {
                    base_section_plane = null;
                    sections[0].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[0]));
                    sections[0].BasePlane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[0].Start, sections[0].End));
                    SetInterSectorElement(sections[0]);  // sections[0].InterSectorElement = new KDCSIntersectorElement(m_rvtDoc.GetElement(sections[0].Refs[0].GetReference().ElementId));
                }
                else return;

            }


            // �浹 ���Ǻ� ���� �۾�
            foreach (Section cur_section in sections)
            {
                Resolve(bendElement, cur_section);
            }

            double bendRadius = 0.32808399; // 100mm


            // ����� ���带 �����ش�.
            ElementId idCableTrayType = bendElement.GetTypeId(); // Util.FindCableTrayTypeId(m_rvtDoc, "Default");
            for (int i = 1; i < sections.Count; i++)
            {
                // Get the end point from the previous section.
                Autodesk.Revit.DB.XYZ start = sections[i - 1].End1;

                // Get the start point from the current section.
                Autodesk.Revit.DB.XYZ end = sections[i].Start1;

                // Create a cabletray between two neighbor section.
                CableTray tmpCableTray = CableTray.Create(m_rvtDoc, idCableTrayType, start, end, levelId);

                // Copy pipe's parameters values to tmpPipe.
                CopyParameters(bendElement, tmpCableTray);


                // Create elbow fitting to connect previous section with tmpPipe.
                Connector conn1 = FindConnector(sections[i - 1].CableTrays[2], start);
                Connector conn2 = FindConnector(tmpCableTray, start);

                if (conn1 != null && conn2 != null)
                {
                    try
                    {
                        var fi = m_rvtDoc.Create.NewElbowFitting(conn1, conn2); //"failed to insert elbow":
                        if (fi != null)
                        {
                            //fi.get_Parameter(BuiltInParameter.RBS_CABLETRAY_BENDRADIUS).Set(bendRadius);
                            //fi.LookupParameter("Ʈ���� ����").Set(0.082021); // 25mm ����                                                                     
                        }
                    }
                    catch (Exception ex) { string strmsg = ex.Message; }
                }

                // Create elbow fitting to connect current section with tmpPipe.
                Connector conn3 = FindConnector(sections[i].CableTrays[0], end);
                Connector conn4 = FindConnector(tmpCableTray, end);
                if (conn3 != null && conn4 != null)
                {
                    try
                    {
                        var fi = m_rvtDoc.Create.NewElbowFitting(conn3, conn4); //"failed to insert elbow":
                        if (fi != null)
                        {
                            //fi.get_Parameter(BuiltInParameter.RBS_CABLETRAY_BENDRADIUS).Set(bendRadius);
                            //fi.LookupParameter("Ʈ���� ����").Set(0.082021); // 25mm ����                                                           
                        }
                    }
                    catch (Exception ex) { string strmsg = ex.Message; }
                }
            }

            // ��Ʈ �����ʰ� ���� ����

            // Find two connectors which pipe's two ends connector connected to. 
            Connector startConn = FindConnectedTo(bendElement, intersectorElement.Line.GetEndPoint(0));
            Connector endConn = FindConnectedTo(bendElement, intersectorElement.Line.GetEndPoint(1));


            //  ���̺�Ʈ���� ������ ó��
            //------------------------------------------------------------------------------------------------
            CableTray startCableTray = null;
            if (null != startConn)
            {
                // Create a pipe between pipe's start connector and pipe's start section.
                startCableTray = CableTray.Create(m_rvtDoc, idCableTrayType, startConn.Origin, sections[0].Start1, levelId);
            }
            else
            {
                // Create a pipe between pipe's start point and pipe's start section.
                startCableTray = CableTray.Create(m_rvtDoc, idCableTrayType, sections[0].Start1, intersectorElement.Line.GetEndPoint(0), levelId);
            }

            // Copy parameters from pipe to startPipe. 
            CopyParameters(bendElement, startCableTray);
            // ������ ���� �߰�
            Connector connStart1 = FindConnector(startCableTray, sections[0].Start1);
            Connector connStart2 = null;

            if (m_AvoidObstructionType != EnumAvoidObstructionType.AvoidDn_ && m_AvoidObstructionType != EnumAvoidObstructionType.AvoidUp_)
            {
                connStart2 = FindConnector(sections[0].CableTrays[0], sections[0].Start1);
            }

            int count = sections.Count;
            if (connStart1 != null && connStart2 != null)
            {
                try
                {
                    var fi = m_rvtDoc.Create.NewElbowFitting(connStart1, connStart2);
                    if (fi != null)
                    {
                        //fi.get_Parameter(BuiltInParameter.RBS_CABLETRAY_BENDRADIUS).Set(bendRadius);
                        //fi.LookupParameter("Ʈ���� ����").Set(0.082021); // 25mm ����                                                        
                    }
                }
                catch (Exception ex) { string strmsg = ex.Message; }
            }
            else if (connStart2 == null && startCableTray != null)
            {
                // startCableTray�� CableTrays[1]�� ���̸� ���߰�, �����Ѵ�.
                var line1 = (sections[count - 1].CableTrays[1].Location as LocationCurve).Curve as Line;
                var line2 = (startCableTray.Location as LocationCurve).Curve as Line;

                XYZ translation = null;
                if (line1.GetEndPoint(0).DistanceTo(line2.GetEndPoint(0)) < line1.GetEndPoint(0).DistanceTo(line2.GetEndPoint(1)))
                {
                    translation = line1.GetEndPoint(0) - line2.GetEndPoint(0);
                }
                else
                {
                    translation = line1.GetEndPoint(0) - line2.GetEndPoint(1);
                }

                ElementTransformUtils.MoveElement(m_rvtDoc, startCableTray.Id, translation);


                List<Element> lstElement2BeDeleted = new List<Element>();
                connStart1 = FindConnector(sections[count - 1].CableTrays[1], line1.GetEndPoint(0));
                connStart2 = FindConnector(startCableTray, line1.GetEndPoint(0));
                if (connStart1 != null && connStart2 != null)
                {

                    JoinCableTraySegment(connStart1, ref connStart2, ref lstElement2BeDeleted);
                    foreach (var el in lstElement2BeDeleted)
                    {
                        m_rvtDoc.Delete(el.Id);
                    }
                }
            }




            //  ��Ʈ ���� ó��
            //------------------------------------------------------------------------------------------------
            CableTray endCableTray = null;
            if (null != endConn)
            {
                // Create a pipe between pipe's end connector and pipe's end section.
                endCableTray = CableTray.Create(m_rvtDoc, idCableTrayType, endConn.Origin, sections[count - 1].End1, levelId);
            }
            else
            {
                // Create a pipe between pipe's end point and pipe's end section.
                endCableTray = CableTray.Create(m_rvtDoc, idCableTrayType, sections[count - 1].End1, intersectorElement.Line.GetEndPoint(1), levelId);
            }

            // Copy parameters from pipe to endPipe.
            CopyParameters(bendElement, endCableTray);

            // ���� ���� �߰�
            Connector connEnd1 = FindConnector(endCableTray, sections[count - 1].End1);
            Connector connEnd2 = null;

            if (m_AvoidObstructionType != EnumAvoidObstructionType.Avoid_Dn && m_AvoidObstructionType != EnumAvoidObstructionType.Avoid_Up)
            {
                connEnd2 = FindConnector(sections[count - 1].CableTrays[2], sections[count - 1].End1);
            }


            if (connEnd1 != null && connEnd2 != null)
            {
                try
                {
                    var fi = m_rvtDoc.Create.NewElbowFitting(connEnd1, connEnd2);
                    if (fi != null)
                    {
                        //fi.get_Parameter(BuiltInParameter.RBS_CABLETRAY_BENDRADIUS).Set(bendRadius);
                        //fi.LookupParameter("Ʈ���� ����").Set(0.082021); // 25mm ����                                                      
                    }
                }
                catch (Exception ex) { string strmsg = ex.Message; }
            }
            else if (connEnd2 == null && endCableTray != null)
            {
                // endCableTray�� CableTrays[1]�� ���̸� ���߰�, �����Ѵ�.
                var line1 = (sections[count - 1].CableTrays[1].Location as LocationCurve).Curve as Line;
                var line2 = (endCableTray.Location as LocationCurve).Curve as Line;

                XYZ translation = null;
                if (line1.GetEndPoint(1).DistanceTo(line2.GetEndPoint(0)) < line1.GetEndPoint(1).DistanceTo(line2.GetEndPoint(1)))
                {
                    translation = line1.GetEndPoint(1) - line2.GetEndPoint(0);
                }
                else
                {
                    translation = line1.GetEndPoint(1) - line2.GetEndPoint(1);
                }

                ElementTransformUtils.MoveElement(m_rvtDoc, endCableTray.Id, translation);

                List<Element> lstElement2BeDeleted = new List<Element>();
                connEnd1 = FindConnector(sections[count - 1].CableTrays[1], line1.GetEndPoint(1));
                connEnd2 = FindConnector(endCableTray, line1.GetEndPoint(1));
                if (connEnd1 != null && connEnd2 != null)
                {
                    JoinCableTraySegment(connEnd1, ref connEnd2, ref lstElement2BeDeleted);
                    foreach (var el in lstElement2BeDeleted)
                    {
                        m_rvtDoc.Delete(el.Id);
                    }
                }
            }


            m_rvtDoc.Delete(bendElement.Id);

        }




        /// <summary>
        /// 주어�??�피?�소 ?�선관 충돌?�소�??�피?�니??
        /// </summary>
        /// <param name="bendElement"></param>
        /// <param name="lstObstruction"></param>
        public void Bend(Conduit bendElement, XYZ hitPoint, ref List<KDCSIntersectorElement> lstObstruction)
        {

            // duct.LookupParameter(string name) 
            var paramLevel = bendElement.get_Parameter(BuiltInParameter.RBS_START_LEVEL_PARAM);
            var levelId = paramLevel.AsElementId();
            var conduitTypeId = bendElement.GetTypeId();


            // 교차 ?�인 ?�소
            KDCSIntersectorElement intersectorElement = new KDCSIntersectorElement(bendElement);

            // ?�애�?충돌 ?�인
            List<ReferenceWithContext> obstructionRefArr = new List<ReferenceWithContext>();
            foreach (KDCSIntersectorElement intersectorObstrion in lstObstruction)
            {
                m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.None;

                // ?�단
                List<ReferenceWithContext> obstructionReference = m_detector.Obstructions(intersectorElement.LineTop, intersectorObstrion);
                if (obstructionReference.Count > 0)
                {
                    foreach (var rwc in obstructionReference)
                    {
                        if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                    }
                    m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointTop;
                }
                else
                {
                    // 중심
                    obstructionReference = m_detector.Obstructions(intersectorElement.Line, intersectorObstrion);
                    if (obstructionReference.Count > 0)
                    {
                        foreach (var rwc in obstructionReference)
                        {
                            if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                        }
                        m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointCenter;
                    }
                    else
                    {
                        // ?�단                          
                        obstructionReference = m_detector.Obstructions(intersectorElement.LineBottom, intersectorObstrion);
                        if (obstructionReference.Count > 0)
                        {
                            foreach (var rwc in obstructionReference)
                            {
                                if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                            }
                            m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointBottom;
                        }
                        else
                        {
                            // ?�쪽
                            obstructionReference = m_detector.Obstructions(intersectorElement.LineLeft, intersectorObstrion);
                            if (obstructionReference.Count > 0)
                            {
                                foreach (var rwc in obstructionReference)
                                {
                                    if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                                }
                                m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointLeft;
                            }
                            else
                            {
                                // ?�른�?
                                obstructionReference = m_detector.Obstructions(intersectorElement.LineRight, intersectorObstrion);
                                if (obstructionReference.Count > 0)
                                {
                                    foreach (var rwc in obstructionReference)
                                    {
                                        if (obstructionRefArr.Contains(rwc) == false) obstructionRefArr.Add(rwc);
                                    }
                                    m_enumAOChectPoint = EnumAvoidObstructionCheckPoint.AO_ChectPointLeft;
                                }
                            }
                        }
                    }
                }
            }

            if (obstructionRefArr.Count == 0) return;

            obstructionRefArr.Sort(m_detector.CompareReferencesWithContext);
          
            // ?�션 ?�성
            List<Section> sections = Section.BuildSections(m_rvtDoc, obstructionRefArr, intersectorElement.Line.Direction);

            if (sections.Count < 1) return;

            Section section1 = sections[0];
            Line line_ub1 = intersectorElement.Line;
            XYZ ptOnHit = line_ub1.Project(hitPoint).XYZPoint;
            XYZ mp_section = Util.Midpoint(section1.Start, section1.End);
            mp_section = line_ub1.Project(mp_section).XYZPoint;
            XYZ v1 = (mp_section - ptOnHit).Normalize();
            XYZ v2 = intersectorElement.Line.Direction;

            if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Up)
            {
                if (v1.IsAlmostEqualTo(v2) == false) m_AvoidObstructionType = EnumAvoidObstructionType.AvoidUp_;

            }
            else if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Dn)
            {
                if (v1.IsAlmostEqualTo(v2) == false) m_AvoidObstructionType = EnumAvoidObstructionType.AvoidDn_;
            }



            //List<Section> lstSectionTmp = new List<Section>();
            //lstSectionTmp.AddRange(sections);
            bool bAllMerge = false;
            if (m_AvoidObstructionType != EnumAvoidObstructionType.AvoidUpDn && m_AvoidObstructionType != EnumAvoidObstructionType.AvoidDnUp) bAllMerge = true;
            Plane base_section_plane = null;
            // ?�션??참조가 2�??�상??경우
            if (sections.Count > 1)
            {
                if (bAllMerge == true)
                {
                    XYZ s_sp = null;
                    XYZ s_ep = null;
                    if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Up || m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Dn)
                    {
                        // ?�작 ?�션
                        s_sp = sections[0].Start;
                        s_ep = sections[0].End;
                    }
                    else if (m_AvoidObstructionType == EnumAvoidObstructionType.AvoidUp_ || m_AvoidObstructionType == EnumAvoidObstructionType.AvoidDn_)
                    {
                        // ???�션
                        s_sp = sections[sections.Count - 1].Start;
                        s_ep = sections[sections.Count - 1].End;

                    }
                    if (s_sp != null && s_ep != null)
                    {
                        base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(s_sp, s_ep));
                    }
                }

               
                //double radUpdownAng = Util.DTR(UpDownAngle);  // ?�르?�림 각도
                //double r1 = dstOffset / Math.Sin(radUpdownAng);
                //double x_offset = r1 * Math.Cos(radUpdownAng);


                for (int i = sections.Count - 2; i >= 0; i--)
                {
                    Autodesk.Revit.DB.XYZ detal = sections[i].End - sections[i + 1].Start;
                    SetInterSectorElement(sections[i]);
                    SetInterSectorElement(sections[i + 1]);
                    sections[i].BasePlane = base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i].Start, sections[i].End));
                    sections[i + 1].BasePlane = base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i + 1].Start, sections[i + 1].End));

                    double dstOffset1 = 0d;
                    double dstOffset2 = 0d;
                    base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i].Start, sections[i].End));
                    sections[i].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[i]));
                    FindRoute(bendElement, sections[i], base_section_plane, ref dstOffset1);
                    sections[i + 1].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[i + 1]));
                    FindRoute(bendElement, sections[i + 1], base_section_plane, ref dstOffset2);
                    base_section_plane = null;

                    // ?�재 ?�션??병합?��? ?�았�??�음 ?�션과의 거리가 ?�무 짧을 경우 병합?�다.
                    // ?�선관?� 3m ?�내�??�정 ?�정
                    if (detal.GetLength() < 9.84252 || bAllMerge)
                    {
                        if (sections[i].IsMerged == false)
                        {
                            sections[i].IsMerged = true;
                            // 병합???�션???�재 ?�션??추�?
                            sections[i].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[i + 1]));
                            sections[i].BasePlane = base_section_plane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[i].Start, sections[i].End));
                        }
                        sections[i].Refs.AddRange(sections[i + 1].Refs);
                        sections.RemoveAt(i + 1);
                    }
                }
            }
            else
            {
                if (sections.Count > 0)
                {
                    base_section_plane = null;
                    sections[0].m_mergedSections.Add(new SimpleSection(m_rvtDoc, sections[0]));
                    sections[0].BasePlane = Plane.CreateByNormalAndOrigin(intersectorElement.EndConnector.CoordinateSystem.BasisY, Util.Midpoint(sections[0].Start, sections[0].End));
                    SetInterSectorElement(sections[0]); //sections[0].InterSectorElement = new KDCSIntersectorElement(m_rvtDoc.GetElement(sections[0].Refs[0].GetReference().ElementId));
                }
                else return;

            }


            // 충돌 ?�션부 벤딩 ?�업
            foreach (Section cur_section in sections)
            {
                Resolve(bendElement, cur_section);
            }



            // 벤드?� 벤드�??�이준??
            for (int i = 1; i < sections.Count; i++)
            {
                // Get the end point from the previous section.
                Autodesk.Revit.DB.XYZ start = sections[i - 1].End1;

                // Get the start point from the current section.
                Autodesk.Revit.DB.XYZ end = sections[i].Start1;

                // Create a duct between two neighbor section.
                //      static Conduit Create(Document document, ElementId conduitType, XYZ startPoint, XYZ endPoint, ElementId levelId);
                Conduit tmpPipe = Conduit.Create(m_rvtDoc, bendElement.GetTypeId(), start, end, levelId);

                // Copy pipe's parameters values to tmpPipe.
                CopyParameters(bendElement, tmpPipe);


                // Create elbow fitting to connect previous section with tmpPipe.
                Connector conn1 = FindConnector(sections[i - 1].Conduits[2], start);
                Connector conn2 = FindConnector(tmpPipe, start);

                if (conn1 != null && conn2 != null)
                {
                    FamilyInstance fi = null;
                    try
                    {
                        fi = m_rvtDoc.Create.NewElbowFitting(conn1, conn2);
                    }
                    catch (Exception ex) { string strmsg = ex.Message; }
                }

                // Create elbow fitting to connect current section with tmpPipe.
                Connector conn3 = FindConnector(sections[i].Conduits[0], end);
                Connector conn4 = FindConnector(tmpPipe, end);
                if (conn3 != null && conn4 != null)
                {
                    FamilyInstance f2 = null;
                    try
                    {
                        f2 = m_rvtDoc.Create.NewElbowFitting(conn3, conn4);
                    }
                    catch (Exception ex) { string strmsg = ex.Message; }
                }
            }


            // ?�선관 ?�작쪽과 ?�쪽 ?�결

            // Find two connectors which pipe's two ends connector connected to. 
            Connector startConn = FindConnectedTo(bendElement, intersectorElement.Line.GetEndPoint(0));
            Connector endConn = FindConnectedTo(bendElement, intersectorElement.Line.GetEndPoint(1));


            //  ?�선관 ?�작�?처리
            //------------------------------------------------------------------------------------------------
            Conduit startPipe = null;
            if (null != startConn)
            {
                // Create a pipe between pipe's start connector and pipe's start section.
                startPipe = Conduit.Create(m_rvtDoc, conduitTypeId, startConn.Origin, sections[0].Start1, levelId);
            }
            else
            {
                // Create a pipe between pipe's start point and pipe's start section.
                startPipe = Conduit.Create(m_rvtDoc, conduitTypeId, sections[0].Start1, intersectorElement.Line.GetEndPoint(0), levelId);
            }

            // Copy parameters from pipe to startPipe. 
            CopyParameters(bendElement, startPipe);
            // ?�작�??�보 추�?
            Connector connStart1 = FindConnector(startPipe, sections[0].Start1);
            Connector connStart2 = null;

            if (m_AvoidObstructionType != EnumAvoidObstructionType.AvoidDn_ && m_AvoidObstructionType != EnumAvoidObstructionType.AvoidUp_)
            {
                connStart2 = FindConnector(sections[0].Conduits[0], sections[0].Start1);
            }

            int count = sections.Count;
            FamilyInstance fii = null;
            if (connStart1 != null && connStart2 != null)
            {
                try
                {
                    fii = m_rvtDoc.Create.NewElbowFitting(connStart1, connStart2);
                }
                catch (Exception ex) { string strmsg = ex.Message; }
            }
            else if (connStart2 == null && startPipe != null)
            {
                // startPipe�?pipes[1]�??�이�?맞추�? ?�결?�다.
                var line1 = (sections[count - 1].Conduits[1].Location as LocationCurve).Curve as Line;
                var line2 = (startPipe.Location as LocationCurve).Curve as Line;

                XYZ translation = null;
                if (line1.GetEndPoint(0).DistanceTo(line2.GetEndPoint(0)) < line1.GetEndPoint(0).DistanceTo(line2.GetEndPoint(1)))
                {
                    translation = line1.GetEndPoint(0) - line2.GetEndPoint(0);
                }
                else
                {
                    translation = line1.GetEndPoint(0) - line2.GetEndPoint(1);
                }

                ElementTransformUtils.MoveElement(m_rvtDoc, startPipe.Id, translation);


                List<Element> lstElement2BeDeleted = new List<Element>();
                connStart1 = FindConnector(sections[count - 1].Conduits[1], line1.GetEndPoint(0));
                connStart2 = FindConnector(startPipe, line1.GetEndPoint(0));
                if (connStart1 != null && connStart2 != null)
                {

                    JoinConduitSegment(connStart1, ref connStart2, ref lstElement2BeDeleted);
                    foreach (var el in lstElement2BeDeleted)
                    {
                        m_rvtDoc.Delete(el.Id);
                    }
                }
            }

            //  ?�이???�쪽 처리
            //------------------------------------------------------------------------------------------------
            Conduit endPipe = null;
            if (null != endConn)
            {
                // Create a pipe between pipe's end connector and pipe's end section.
                endPipe = Conduit.Create(m_rvtDoc, bendElement.GetTypeId(), endConn.Origin, sections[count - 1].End1, levelId);
            }
            else
            {
                // Create a pipe between pipe's end point and pipe's end section.
                endPipe = Conduit.Create(m_rvtDoc, bendElement.GetTypeId(), sections[count - 1].End1, intersectorElement.Line.GetEndPoint(1), levelId);
            }

            // Copy parameters from pipe to endPipe.
            CopyParameters(bendElement, endPipe);

            // ?�쪽 ?�보 추�?
            Connector connEnd1 = FindConnector(endPipe, sections[count - 1].End1);
            Connector connEnd2 = null;

            if (m_AvoidObstructionType != EnumAvoidObstructionType.Avoid_Dn && m_AvoidObstructionType != EnumAvoidObstructionType.Avoid_Up)
            {
                connEnd2 = FindConnector(sections[count - 1].Conduits[2], sections[count - 1].End1);
            }
            FamilyInstance fiii = null;

            if (connEnd1 != null && connEnd2 != null)
            {
                try
                {
                    fiii = m_rvtDoc.Create.NewElbowFitting(connEnd1, connEnd2);
                }
                catch (Exception ex) { string strmsg = ex.Message; }
            }
            else if (connEnd2 == null && endPipe != null)
            {
                // endDuct�?ducts[1]�??�이�?맞추�? ?�결?�다.
                var line1 = (sections[count - 1].Conduits[1].Location as LocationCurve).Curve as Line;
                var line2 = (endPipe.Location as LocationCurve).Curve as Line;

                XYZ translation = null;
                if (line1.GetEndPoint(1).DistanceTo(line2.GetEndPoint(0)) < line1.GetEndPoint(1).DistanceTo(line2.GetEndPoint(1)))
                {
                    translation = line1.GetEndPoint(1) - line2.GetEndPoint(0);
                }
                else
                {
                    translation = line1.GetEndPoint(1) - line2.GetEndPoint(1);
                }

                ElementTransformUtils.MoveElement(m_rvtDoc, endPipe.Id, translation);

                List<Element> lstElement2BeDeleted = new List<Element>();
                connEnd1 = FindConnector(sections[count - 1].Conduits[1], line1.GetEndPoint(1));
                connEnd2 = FindConnector(endPipe, line1.GetEndPoint(1));
                if (connEnd1 != null && connEnd2 != null)
                {
                    JoinConduitSegment(connEnd1, ref connEnd2, ref lstElement2BeDeleted);
                    foreach (var el in lstElement2BeDeleted)
                    {
                        m_rvtDoc.Delete(el.Id);
                    }
                }
            }


            m_rvtDoc.Delete(bendElement.Id);


        }



        /// <summary>
        /// Filter the inputting References, just allow Pipe, Duct and Beam References.
        /// </summary>
        /// <param name="pipe">Pipe</param>
        /// <param name="refs">References to filter</param>
        private void Filter(Pipe pipe, List<ReferenceWithContext> refs)
        {
            for (int i = refs.Count - 1; i >= 0; i--)
            {
                Reference cur = refs[i].GetReference();
                Element curElem = m_rvtDoc.GetElement(cur);
                if (curElem.Id == pipe.Id ||
                (!(curElem is Pipe) && !(curElem is Duct) &&
                curElem.Category.Id.IntegerValue != (int)BuiltInCategory.OST_StructuralFraming))
                {
                    refs.RemoveAt(i);
                }
            }
        }


        private void Filter(Duct duct, List<ReferenceWithContext> refs)
        {
            for (int i = refs.Count - 1; i >= 0; i--)
            {
                Reference cur = refs[i].GetReference();
                Element curElem = m_rvtDoc.GetElement(cur);

                // ?�음 조건??만족?��? ?�으�??�거
                if (curElem.Id == duct.Id ||
                (!(curElem is Duct) && curElem.Category.Id.IntegerValue != (int)BuiltInCategory.OST_StructuralFraming))
                {
                    refs.RemoveAt(i);
                }
            }
        }



        /// <summary>
        /// ?�애물과 교차?�여 만들?�진 ?�션 중심?�서 ???�로 관?�하???�과 만나??교차????�?최상/최하 ?�을 구한??
        /// </summary>
        /// <param name="pln">기�? ?�션 ?�면</param>
        /// <param name="sections"></param>
        /// <param name="vUp"></param>
        /// <param name="ptUpper"></param>
        /// <param name="ptLower"></param>
        private void GetIntersectVerticalUpperLower(Plane pln, ref List<SimpleSection> sections, XYZ vUp, ref XYZ ptUpper, ref XYZ ptLower)
        {
            double upperMax = double.MinValue;
            double lowerMax = double.MinValue;
            ptUpper = new XYZ(0, 0, double.MinValue);
            ptLower = new XYZ(0, 0, double.MaxValue);
            bool bIsTop = false;
            bool bIsBottom = false;

            // ?�션?�을 ?�직?�로 관?�하???�들 �?가???�쪽 ?�과 ?�래 �??�을 각각 구한??
            foreach (SimpleSection cur_section in sections)
            {
                var pts = cur_section.GetIntersectUpperLower(vUp, m_detector.GetView3d());
                if (pts.Count >= 2)
                {
                    //Util.CreateModelLine(m_rvtDoc, pts[0], pts[1]);
                    foreach (XYZ pt in pts)
                    {
                        XYZ ptOnSectionPlane = Util.Project(pln, pt);
                        double dst = ptOnSectionPlane.DistanceTo(pt);
                        if ((pt - ptOnSectionPlane).Normalize().IsAlmostEqualTo(vUp) == true)
                        {
                            if (dst > upperMax)
                            {
                                ptUpper = new XYZ(pt.X, pt.Y, pt.Z);
                                upperMax = dst;
                                bIsTop = true;
                            }
                        }
                        else
                        {
                            if (dst > lowerMax)
                            {
                                ptLower = new XYZ(pt.X, pt.Y, pt.Z);
                                lowerMax = dst;
                                bIsBottom = true;
                            }
                        }
                    }
                }
                else
                {
                    // 케?�블 ?�레?�처???�래쪽에�?면이 존재?�거???�는 경우 처리
                    var pt = cur_section.MidPoint;
                    KDCSIntersectorElement ie = new KDCSIntersectorElement(cur_section.ReferenceElement);
                    XYZ ptOnCLine = ie.Line.Project(pt).XYZPoint;
                    ptUpper = new XYZ(pt.X, pt.Y, ptOnCLine.Z + ie.Height * 0.5);
                    ptLower = new XYZ(pt.X, pt.Y, ptOnCLine.Z - ie.Height * 0.5);

                }


            }
            if(sections.Count>0){
                var pt = sections[0].MidPoint;
                KDCSIntersectorElement ie = new KDCSIntersectorElement(sections[0].ReferenceElement);
                XYZ ptOnCLine = ie.Line.Project(pt).XYZPoint;
               
               
                if (bIsTop == false)
                {
                    ptUpper = new XYZ(pt.X, pt.Y, ptOnCLine.Z + ie.Height * 0.5);
                }
                if (bIsBottom == false)
                {
                    ptLower = new XYZ(pt.X, pt.Y, ptOnCLine.Z - ie.Height * 0.5);
                }
            }
        }


        /// <summary>
        /// ?�애물을 ?�할 ???�는 ?�트 중심?�과 ?�행???�을 찾는??
        /// </summary>
        /// <param name="duct">?�트</param>
        /// <param name="section">?�션</param>
        /// <returns>?�애물을 ?�할 ???�는 ?�트 중심?�과 ?�행????/returns>
        private Line FindRoute(Duct duct, Section section, Plane base_section_plane, ref double dstOffset)
        {
            KDCSIntersectorElement ieDuct = new KDCSIntersectorElement(duct);
            XYZ vUp = ieDuct.EndConnector.CoordinateSystem.BasisY.Z > 0 ? ieDuct.EndConnector.CoordinateSystem.BasisY : -ieDuct.EndConnector.CoordinateSystem.BasisY;


            //double jumpStep = ieDuct.Height;

            //Util.CreateModelLine(this.m_rvtDoc, section.Start, section.End);


            List<Autodesk.Revit.DB.XYZ> dirs = new List<Autodesk.Revit.DB.XYZ>();
            XYZ ptMidSection = Util.Midpoint(section.Start, section.End);  // ?�션 중심??
            XYZ ptUpper = new XYZ(0, 0, double.MinValue);
            XYZ ptLower = new XYZ(0, 0, double.MaxValue);
            if (base_section_plane != null)
            {
                ptMidSection = base_section_plane.Origin;
                GetIntersectVerticalUpperLower(base_section_plane, ref section.m_mergedSections, vUp, ref ptUpper, ref ptLower);
            }
            else
            {
                ptMidSection = section.m_mergedSections[0].MidPoint;

                Document linkDoc = section.InterSectorElement.GetLinkDocument();
                Element elm = section.m_mergedSections[0].ReferenceElement;


                KDCSIntersectorElement curveElm = new KDCSIntersectorElement(elm, null, linkDoc);
            
    
                //Util.CreateModelLine(m_rvtDoc, curveElm.StartPoint, curveElm.EndPoint);
                GetIntersectVerticalUpperLower(section.BasePlane, ref section.m_mergedSections, vUp, ref ptUpper, ref ptLower);
            }
            

            XYZ ptOnObstruction = section.InterSectorElement.Line.Project(ptMidSection).XYZPoint;


            double dstMidSection2OnObstruction = 0;
            // ?�애�??�션 중심?�서 ?�피 방향?�로 지?�는 광선�?교차?�는 교차?�을 구한??
            Line sectionVLine = Line.CreateBound(ptOnObstruction - vUp * section.InterSectorElement.Height, ptOnObstruction + vUp * section.InterSectorElement.Height);
            XYZ ptMidSectionOn = sectionVLine.Project(ptMidSection).XYZPoint;
            m_ptMidSectionOn = section.InterSectorElement.Line.Project(ptMidSectionOn).XYZPoint;
 


            // ?�이??중심?�을 지?�는 ?�면
            Plane planeDuct = Plane.CreateByNormalAndOrigin(vUp, ieDuct.StartPoint);
            XYZ ptOnDuct = Util.Project(planeDuct, ptMidSectionOn);
            XYZ vAvoid = (ptOnDuct - ptMidSectionOn).Normalize();   // ?�트 ?�피 방향  m_AvoidObstructionType
            // 간섭?�소 중심?�을 지?�는 ?�면
            Plane planeObstruction = Plane.CreateByNormalAndOrigin(vUp, section.InterSectorElement.StartPoint);
            XYZ ptOnObstructionCenter = Util.Project(planeObstruction, ptMidSectionOn);

            //double dInflate = section.InterSectorElement.Width < iePipe.Height ? iePipe.Height * 3d : iePipe.Height * 0.3;
            double dInflate = ieDuct.Height * 0.3;
            section.Inflate(0, dInflate);
            section.Inflate(1, dInflate);
            double moveHeight = ieDuct.Height * 3d; // 0.5 + mins1[0].Proximity;

            switch (m_AvoidObstructionType)
            {
                case EnumAvoidObstructionType.Avoid_Up:
                case EnumAvoidObstructionType.AvoidUpDn:
                case EnumAvoidObstructionType.AvoidUp_:
                    vAvoid = vUp;
                    if (base_section_plane != null)
                    {
                        moveHeight = ieDuct.Height / 2 + Util.Project(base_section_plane, ptUpper).DistanceTo(ptUpper);
                    }
                    else
                    {
                        moveHeight = ieDuct.Height / 2 + Util.Project(section.BasePlane, ptUpper).DistanceTo(ptUpper);
                    }

                    break;
                case EnumAvoidObstructionType.Avoid_Dn:
                case EnumAvoidObstructionType.AvoidDnUp:
                case EnumAvoidObstructionType.AvoidDn_:
                    vAvoid = -vUp;
                    if (base_section_plane != null)
                    {
                        ptMidSectionOn = Util.Project(base_section_plane, ptLower);
                        moveHeight = ieDuct.Height / 2 + ptLower.DistanceTo(ptMidSectionOn);
                    }
                    else
                    {
                        ptMidSectionOn = Util.Project(section.BasePlane, ptLower);
                        moveHeight = ieDuct.Height / 2 + ptLower.DistanceTo(ptMidSectionOn); //+p2.DistanceTo(ptMidSectionOn);
                    }
                    break;
            }

            moveHeight += Geo.MmToFoot(UpDownFreeSpaceHeight); // + ?�유공간?�이 
            // ?�르?�림 ?�기 + ?�유공간 ?�이
            Line foundLine = FindParallelLine(section, vAvoid, moveHeight);

            XYZ spFoundLine = foundLine.GetEndPoint(0);
            dstOffset = Util.Project(planeDuct, spFoundLine).DistanceTo(spFoundLine);

            return foundLine;
        }


        /// <summary>
        /// ?�애물을 ?�할 ???�는 ?�이??중심?�과 ?�행???�을 찾는??
        /// </summary>
        /// <param name="pipe">?�이??/param>
        /// <param name="section">?�션</param>
        /// <returns>?�애물을 ?�할 ???�는 ?�이??중심?�과 ?�행????/returns>
        private Line FindRoute(Pipe pipe, Section section, Plane base_section_plane, ref double dstOffset)
        {
            KDCSIntersectorElement iePipe = new KDCSIntersectorElement(pipe);
            XYZ vUp = iePipe.EndConnector.CoordinateSystem.BasisY.Z > 0 ? iePipe.EndConnector.CoordinateSystem.BasisY : -iePipe.EndConnector.CoordinateSystem.BasisY;



            //double minLength = iePipe.Width * 2;
            //double jumpStep = iePipe.Height;



            List<Autodesk.Revit.DB.XYZ> dirs = new List<Autodesk.Revit.DB.XYZ>();
            XYZ ptMidSection = Util.Midpoint(section.Start, section.End);  // ?�션 중심??
            XYZ ptUpper = new XYZ(0, 0, double.MinValue);
            XYZ ptLower = new XYZ(0, 0, double.MaxValue);
            if (base_section_plane != null)
            {
                ptMidSection = base_section_plane.Origin;
                GetIntersectVerticalUpperLower(base_section_plane, ref section.m_mergedSections, vUp, ref ptUpper, ref ptLower);
            }
            else
            {
                ptMidSection = section.m_mergedSections[0].MidPoint;

                KDCSIntersectorElement curveElm = new KDCSIntersectorElement(GetElement(section));

                //Util.CreateModelLine(m_rvtDoc, curveElm.StartPoint, curveElm.EndPoint);

                GetIntersectVerticalUpperLower(section.BasePlane, ref section.m_mergedSections, vUp, ref ptUpper, ref ptLower);
            }


            XYZ ptOnObstruction = section.InterSectorElement.Line.Project(ptMidSection).XYZPoint;


            double dstMidSection2OnObstruction = 0;

            // ?�애�??�션 중심?�서 ?�피 방향?�로 지?�는 광선�?교차?�는 교차?�을 구한??
            Line sectionVLine = Line.CreateBound(ptOnObstruction - vUp * 328.0, ptOnObstruction + vUp * 328.0);
            XYZ ptMidSectionOn = sectionVLine.Project(ptMidSection).XYZPoint;
            m_ptMidSectionOn = section.InterSectorElement.Line.Project(ptMidSectionOn).XYZPoint;
            /*
            var obsRef = m_detector.Obstructions(sectionVLine, section.InterSectorElement.Id);
            XYZ p1 = new XYZ();
            XYZ p2 = new XYZ();
            if (obsRef.Count > 0)
            {
                List<Section> sectionsUp = Section.BuildSections(obsRef, vUp);
                p1 = sectionsUp[0].Start;
                p2 = sectionsUp[0].End;
                if ((p1 - p2).Z < 0)
                {
                    p1 = obsRef[1].GetReference().GlobalPoint;
                    p2 = obsRef[0].GetReference().GlobalPoint;
                }
                //Util.CreateModelLine(this.m_rvtDoc, p1, p2);
                dstMidSection2OnObstruction = p1.DistanceTo(ptMidSectionOn);
            }
            else return null;
            */

            // ?�이??중심?�을 지?�는 ?�면
            Plane planePipe = Plane.CreateByNormalAndOrigin(vUp, iePipe.StartPoint);
            XYZ ptOnDuct = Util.Project(planePipe, ptMidSectionOn);
            XYZ vAvoid = (ptOnDuct - ptMidSectionOn).Normalize();   // ?�트 ?�피 방향  m_AvoidObstructionType
            // 간섭?�소 중심?�을 지?�는 ?�면
            Plane planeObstruction = Plane.CreateByNormalAndOrigin(vUp, section.InterSectorElement.StartPoint);
            XYZ ptOnObstructionCenter = Util.Project(planeObstruction, ptMidSectionOn);

            //double dInflate = section.InterSectorElement.Width < iePipe.Height ? iePipe.Height * 3d : iePipe.Height * 0.3;
            double dInflate = iePipe.Height * 0.3;
            section.Inflate(0, dInflate);
            section.Inflate(1, dInflate);
            double moveHeight = iePipe.Height * 3d; // 0.5 + mins1[0].Proximity;

            switch (m_AvoidObstructionType)
            {
                case EnumAvoidObstructionType.Avoid_Up:
                case EnumAvoidObstructionType.AvoidUpDn:
                case EnumAvoidObstructionType.AvoidUp_:
                    vAvoid = vUp;
                    if (base_section_plane != null)
                    {
                        moveHeight = iePipe.Height / 2 + Util.Project(base_section_plane, ptUpper).DistanceTo(ptUpper);
                    }
                    else
                    {
                        moveHeight = iePipe.Height / 2 + Util.Project(section.BasePlane, ptUpper).DistanceTo(ptUpper);
                    }

                    break;
                case EnumAvoidObstructionType.Avoid_Dn:
                case EnumAvoidObstructionType.AvoidDnUp:
                case EnumAvoidObstructionType.AvoidDn_:
                    vAvoid = -vUp;
                    if (base_section_plane != null)
                    {
                        ptMidSectionOn = Util.Project(base_section_plane, ptLower);
                        moveHeight = iePipe.Height / 2 + ptLower.DistanceTo(ptMidSectionOn);
                    }
                    else
                    {
                        ptMidSectionOn = Util.Project(section.BasePlane, ptLower);
                        moveHeight = iePipe.Height / 2 + ptLower.DistanceTo(ptMidSectionOn); //+p2.DistanceTo(ptMidSectionOn);
                    }
                    break;
            }

            moveHeight += Geo.MmToFoot(UpDownFreeSpaceHeight); // + ?�유공간?�이 
            // ?�르?�림 ?�기 + ?�유공간 ?�이
            Line foundLine = FindParallelLine(section, vAvoid, moveHeight);

            XYZ spFoundLine = foundLine.GetEndPoint(0);
            dstOffset = Util.Project(planePipe, spFoundLine).DistanceTo(spFoundLine);

            return foundLine;
        }


        /// <summary>
        /// ?�애물을 ?�할 ???�는 케?�블?�레??중심?�과 ?�행???�을 찾는??
        /// </summary>
        /// <param name="duct">케?�블?�레??/param>
        /// <param name="section">?�션</param>
        /// <returns>?�애물을 ?�할 ???�는 케?�블?�레??중심?�과 ?�행????/returns>
        private Line FindRoute(CableTray cabletray, Section section, Plane base_section_plane, ref double dstOffset)
        {
            KDCSIntersectorElement ieCableTray = new KDCSIntersectorElement(cabletray);
            XYZ vUp = ieCableTray.EndConnector.CoordinateSystem.BasisY.Z > 0 ? ieCableTray.EndConnector.CoordinateSystem.BasisY : -ieCableTray.EndConnector.CoordinateSystem.BasisY;



            List<Autodesk.Revit.DB.XYZ> dirs = new List<Autodesk.Revit.DB.XYZ>();
            XYZ ptMidSection = Util.Midpoint(section.Start, section.End);  // ?�션 중심??
            XYZ ptUpper = new XYZ(0, 0, double.MinValue);
            XYZ ptLower = new XYZ(0, 0, double.MaxValue);
            if (base_section_plane != null)
            {
                ptMidSection = base_section_plane.Origin;
                GetIntersectVerticalUpperLower(base_section_plane, ref section.m_mergedSections, vUp, ref ptUpper, ref ptLower);
            }
            else
            {
                ptMidSection = section.BasePlane.Origin;
                GetIntersectVerticalUpperLower(section.BasePlane, ref section.m_mergedSections, vUp, ref ptUpper, ref ptLower);
            }

            XYZ ptOnObstruction = section.InterSectorElement.Line.Project(ptMidSection).XYZPoint;


            double dstMidSection2OnObstruction = 0;
            // ?�애�??�션 중심?�서 ?�피 방향?�로 지?�는 광선�?교차?�는 교차?�을 구한??
            Line sectionVLine = Line.CreateBound(ptOnObstruction - vUp * section.InterSectorElement.Height, ptOnObstruction + vUp * section.InterSectorElement.Height);
            XYZ ptMidSectionOn = sectionVLine.Project(ptMidSection).XYZPoint;
            m_ptMidSectionOn = section.InterSectorElement.Line.Project(ptMidSectionOn).XYZPoint;
            /*
            var obsRef = m_detector.Obstructions(sectionVLine, section.InterSectorElement);
            XYZ p1 = new XYZ();
            XYZ p2 = new XYZ();
            if (obsRef.Count > 0)
            {
                List<Section> sectionsUp = Section.BuildSections(m_rvtDoc, obsRef, vUp);
                p1 = sectionsUp[0].Start;
                p2 = sectionsUp[0].End;
                if ((p1 - p2).Z < 0)
                {
                    p1 = obsRef[1].GetReference().GlobalPoint;
                    p2 = obsRef[0].GetReference().GlobalPoint;
                }
                //Util.CreateModelLine(this.m_rvtDoc, p1, p2);
                dstMidSection2OnObstruction = p1.DistanceTo(ptMidSectionOn);

            }
            else return null;
            */

            // 케?�블?�레??중심?�을 지?�는 ?�면
            Plane planeCableTray = Plane.CreateByNormalAndOrigin(vUp, ieCableTray.StartPoint);
            XYZ ptOnCableTray = Util.Project(planeCableTray, ptMidSectionOn);
            XYZ vAvoid = (ptOnCableTray - ptMidSectionOn).Normalize();   // 케?�블?�레???�피 방향  m_AvoidObstructionType



            double dInflate = ieCableTray.Height * 0.3 + 0.246063;  // 75mm(0.246063ft): ?�보 ?�레??기본 길이
            section.Inflate(0, dInflate);
            section.Inflate(1, dInflate);
            double moveHeight = ieCableTray.Height * 3d; // 0.5 + mins1[0].Proximity;

            switch (m_AvoidObstructionType)
            {
                case EnumAvoidObstructionType.Avoid_Up:
                case EnumAvoidObstructionType.AvoidUpDn:
                case EnumAvoidObstructionType.AvoidUp_:
                    vAvoid = vUp;
                    if (base_section_plane != null)
                    {
                        moveHeight = ieCableTray.Height / 2 + Util.Project(base_section_plane, ptUpper).DistanceTo(ptUpper);
                    }
                    else
                    {
                        //moveHeight = ieCableTray.Height / 2 + p1.DistanceTo(ptMidSectionOn);
                        moveHeight = ieCableTray.Height / 2 + Util.Project(section.BasePlane, ptUpper).DistanceTo(ptUpper);
                    }

                    break;
                case EnumAvoidObstructionType.Avoid_Dn:
                case EnumAvoidObstructionType.AvoidDnUp:
                case EnumAvoidObstructionType.AvoidDn_:
                    vAvoid = -vUp;
                    if (base_section_plane != null)
                    {
                        ptMidSectionOn = Util.Project(base_section_plane, ptLower);
                        moveHeight = ieCableTray.Height / 2 + ptLower.DistanceTo(ptMidSectionOn);
                    }
                    else
                    {
                        ptMidSection = Util.Project(section.BasePlane, ptLower);
                        moveHeight = ieCableTray.Height / 2 + ptLower.DistanceTo(ptMidSectionOn); //+p2.DistanceTo(ptMidSectionOn);
                    }
                    break;
            }

            moveHeight += Geo.MmToFoot(UpDownFreeSpaceHeight); // + ?�유공간?�이 
            // ?�르?�림 ?�기 + ?�유공간 ?�이
            Line foundLine = FindParallelLine(section, vAvoid, moveHeight);

            XYZ spFoundLine = foundLine.GetEndPoint(0);
            dstOffset = Util.Project(planeCableTray, spFoundLine).DistanceTo(spFoundLine);

            return foundLine;
        }



        /// <summary>
        /// ?�애물을 ?�할 ???�는 ?�선관 중심?�과 ?�행???�을 찾는??
        /// </summary>
        /// <param name="conduit">?�선관</param>
        /// <param name="section">?�션</param>
        /// <returns>?�애물을 ?�할 ???�는 ?�이??중심?�과 ?�행????/returns>
        private Line FindRoute(Conduit conduit, Section section, Plane base_section_plane, ref double dstOffset)
        {
            KDCSIntersectorElement iePipe = new KDCSIntersectorElement(conduit);
            XYZ vUp = iePipe.EndConnector.CoordinateSystem.BasisY.Z > 0 ? iePipe.EndConnector.CoordinateSystem.BasisY : -iePipe.EndConnector.CoordinateSystem.BasisY;



            //double minLength = iePipe.Width * 2;
            //double jumpStep = iePipe.Height;



            List<Autodesk.Revit.DB.XYZ> dirs = new List<Autodesk.Revit.DB.XYZ>();
            XYZ ptMidSection = Util.Midpoint(section.Start, section.End);  // ?�션 중심??
            XYZ ptUpper = new XYZ(0, 0, double.MinValue);
            XYZ ptLower = new XYZ(0, 0, double.MaxValue);
            if (base_section_plane != null)
            {
                ptMidSection = base_section_plane.Origin;
                GetIntersectVerticalUpperLower(base_section_plane, ref section.m_mergedSections, vUp, ref ptUpper, ref ptLower);
            }
            else
            {
                ptMidSection = section.m_mergedSections[0].MidPoint;

                KDCSIntersectorElement curveElm = new KDCSIntersectorElement(GetElement(section));

                //Util.CreateModelLine(m_rvtDoc, curveElm.StartPoint, curveElm.EndPoint);

                GetIntersectVerticalUpperLower(section.BasePlane, ref section.m_mergedSections, vUp, ref ptUpper, ref ptLower);
            }


            XYZ ptOnObstruction = section.InterSectorElement.Line.Project(ptMidSection).XYZPoint;

            // ?�애�??�션 중심?�서 ?�피 방향?�로 지?�는 광선�?교차?�는 교차?�을 구한??
            Line sectionVLine = Line.CreateBound(ptOnObstruction - vUp * 328.0, ptOnObstruction + vUp * 328.0);
            XYZ ptMidSectionOn = sectionVLine.Project(ptMidSection).XYZPoint;
            m_ptMidSectionOn = section.InterSectorElement.Line.Project(ptMidSectionOn).XYZPoint;
           

            // ?�이??중심?�을 지?�는 ?�면
            Plane planePipe = Plane.CreateByNormalAndOrigin(vUp, iePipe.StartPoint);
            XYZ ptOnDuct = Util.Project(planePipe, ptMidSectionOn);
            XYZ vAvoid = (ptOnDuct - ptMidSectionOn).Normalize();   // ?�트 ?�피 방향  m_AvoidObstructionType
            // 간섭?�소 중심?�을 지?�는 ?�면
            Plane planeObstruction = Plane.CreateByNormalAndOrigin(vUp, section.InterSectorElement.StartPoint);
            XYZ ptOnObstructionCenter = Util.Project(planeObstruction, ptMidSectionOn);

            //double dInflate = section.InterSectorElement.Width < iePipe.Height ? iePipe.Height * 3d : iePipe.Height * 0.3;
            double dInflate = section.Start.DistanceTo(section.End) < 1.8 ? 1.8 : iePipe.Height * 0.3;
          
            section.Inflate(0, dInflate);
            section.Inflate(1, dInflate);
            double moveHeight = iePipe.Height * 3d; // 0.5 + mins1[0].Proximity;

            switch (m_AvoidObstructionType)
            {
                case EnumAvoidObstructionType.Avoid_Up:
                case EnumAvoidObstructionType.AvoidUpDn:
                case EnumAvoidObstructionType.AvoidUp_:
                    vAvoid = vUp;
                    if (base_section_plane != null)
                    {
                        moveHeight = iePipe.Height / 2 + Util.Project(base_section_plane, ptUpper).DistanceTo(ptUpper);
                    }
                    else
                    {
                        moveHeight = iePipe.Height / 2 + Util.Project(section.BasePlane, ptUpper).DistanceTo(ptUpper);
                    }

                    break;
                case EnumAvoidObstructionType.Avoid_Dn:
                case EnumAvoidObstructionType.AvoidDnUp:
                case EnumAvoidObstructionType.AvoidDn_:
                    vAvoid = -vUp;
                    if (base_section_plane != null)
                    {
                        ptMidSectionOn = Util.Project(base_section_plane, ptLower);
                        moveHeight = iePipe.Height / 2 + ptLower.DistanceTo(ptMidSectionOn);
                    }
                    else
                    {
                        ptMidSectionOn = Util.Project(section.BasePlane, ptLower);
                        moveHeight = iePipe.Height / 2 + ptLower.DistanceTo(ptMidSectionOn); //+p2.DistanceTo(ptMidSectionOn);
                    }
                    break;
            }

            moveHeight += Geo.MmToFoot(UpDownFreeSpaceHeight); // + ?�유공간?�이 
            // ?�르?�림 ?�기 + ?�유공간 ?�이
            Line foundLine = FindParallelLine(section, vAvoid, moveHeight);

            XYZ spFoundLine = foundLine.GetEndPoint(0);
            dstOffset = Util.Project(planePipe, spFoundLine).DistanceTo(spFoundLine);

            return foundLine;
        }


        private Line FindParallelLine(Section section, Autodesk.Revit.DB.XYZ dir, double height)
        {
            Autodesk.Revit.DB.XYZ detal = dir * height;
            Line line = Line.CreateBound(section.Start + detal, section.End + detal);
            return line;
        }

        /// <summary>
        /// Find out two References, whose ProximityParameter is negative or positive,
        /// And Get the minimal value from all positive reference, and get the maximal value 
        /// from the negative reference. if there are no such reference, using null instead.
        /// </summary>
        /// <param name="refs">References</param>
        /// <returns>Reference array</returns>
        private ReferenceWithContext[] GetClosestSectionsToOrigin(List<ReferenceWithContext> refs)
        {
            ReferenceWithContext[] mins = new ReferenceWithContext[2];
            if (refs.Count == 0)
            {
                return mins;
            }

            if (refs[0].Proximity > 0)
            {
                mins[1] = refs[0];
                return mins;
            }

            for (int i = 0; i < refs.Count - 1; i++)
            {
                if (refs[i].Proximity < 0 && refs[i + 1].Proximity > 0)
                {
                    mins[0] = refs[i];
                    mins[1] = refs[i + 1];
                    return mins;
                }
            }

            mins[0] = refs[refs.Count - 1];

            return mins;
        }

        public void MepSystem()
        {
            Document doc = m_rvtDoc;
            FilteredElementCollector systemCollector = new FilteredElementCollector(doc).OfClass(typeof(MEPSystem));

            IEnumerable<Element> desirableSystems = systemCollector.ToElements();
            foreach (Element elm in desirableSystems)
            {
                MEPSystem system = elm as MEPSystem;
                if (system != null)
                {
                    if (system.GetType() == typeof(Autodesk.Revit.DB.Plumbing.PipingSystem))
                    {
                        Autodesk.Revit.DB.Plumbing.PipeSystemType type = (system as Autodesk.Revit.DB.Plumbing.PipingSystem).SystemType;
                    }
                    string name = system.Name;
                }

            }
        }



        public Pipe CreateNewPipe(Document document, ElementId systemTypeId, ElementId levelId)
        {
            Pipe pipe = null;
            PipeType pipeType = null;
            // find a pipe type          
            var pipeTypes = new FilteredElementCollector(document).OfClass(typeof(PipeType)).ToElements();
            if (pipeTypes.Count > 0)
            {
                pipeType = pipeTypes[pipeTypes.Count - 1] as PipeType;
            }

            if (pipeType == null) return null;


            // create pipe between 2 points
            XYZ p1 = new XYZ(0, 0, 0);
            XYZ p2 = new XYZ(10, 0, 0);

            pipe = Pipe.Create(document, systemTypeId, pipeType.Id, levelId, p1, p2);

            return pipe;
        }




        /// <summary>
        /// ?�애물을 ?�피?�기 ?�한 경로�?찾는??
        /// </summary>
        /// <param name="duct">?�피?�소(?�트)</param>
        /// <param name="section">?�트??진로�?방해?�는 Section</param>
        private void Resolve(Duct duct, Section section)
        {
            KDCSIntersectorElement ieDuct = new KDCSIntersectorElement(duct);
            var ductHeight = ieDuct.Height;
            var section_len = section.Start.DistanceTo(section.End);
            if (section_len < ductHeight * 2.5)
            {
                section.Inflate(0, ductHeight);
                section.Inflate(1, ductHeight);
            }

            // ?�애물을 ?�할 ???�는 ?�트 중심?�과 ?�행???�을 찾는??
            double dstOffset = 0d;  //  ?�피?�소 중심?�서 ?�르?�림???�기(?�이)
            Line offset = null;


            if (section.IsMerged)
            {
                offset = FindRoute(duct, section, section.BasePlane, ref dstOffset);
                XYZ v1 = (offset.GetEndPoint(0) - section.Start);
                double hgt = v1.GetLength();
                v1 = v1.Normalize();
                XYZ p1 = Util.Project(section.BasePlane, section.Start);
                XYZ p2 = Util.Project(section.BasePlane, section.End);
                offset = Line.CreateBound(p1 + v1 * hgt, p2 + v1 * hgt);

            }
            else offset = FindRoute(duct, section, null, ref dstOffset);

           

            // 벤딩
            Line ductLine = ieDuct.Line;
            XYZ sectionStart = ductLine.Project(offset.GetEndPoint(0)).XYZPoint;
            XYZ sectionEnd = ductLine.Project(offset.GetEndPoint(1)).XYZPoint;
            Line sectionLine = Line.CreateBound(sectionStart, sectionEnd);
            XYZ dir = offset.Direction;


            //Util.CreateModelLine(m_rvtDoc, offset.GetEndPoint(0), offset.GetEndPoint(1)); 
            double radUpdownAng = Util.DTR(UpDownAngle);  // ?�르?�림 각도
            double r1 = dstOffset / Math.Sin(radUpdownAng);
            double x_offset = r1 * Math.Cos(radUpdownAng);


            XYZ ptStart = sectionLine.GetEndPoint(0) - dir * x_offset;
            XYZ ptEnd = sectionLine.GetEndPoint(1) + dir * x_offset;
            section.Start1 = ptStart;
            section.End1 = ptEnd;
            // Construct two side lines, which can avoid the obstruction too.
            Line side1 = Line.CreateBound(ptStart, offset.GetEndPoint(0));
            Line side2 = Line.CreateBound(offset.GetEndPoint(1), ptEnd);


            //
            // Create an "U" shape, which connected with three pipes and two elbows, to round the obstruction.
            //
            DuctType ductType = duct.DuctType;
 
            Autodesk.Revit.DB.XYZ start = side1.GetEndPoint(0);
            Autodesk.Revit.DB.XYZ startOffset = offset.GetEndPoint(0);
            Autodesk.Revit.DB.XYZ endOffset = offset.GetEndPoint(1);
            Autodesk.Revit.DB.XYZ end = side2.GetEndPoint(1);

            var parameter = duct.get_Parameter(BuiltInParameter.RBS_START_LEVEL_PARAM);
            var levelId = parameter.AsElementId();
            // Create three side pipes of "U" shape.
            var systemTypeId = duct.MEPSystem.GetTypeId(); // m_ductSystemType.Id ���� duct.MEPSystem.GetTypeId()�� ���� by gslee 2023-05-03


            if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Up || m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Dn)
            {
                side2 = null;
                Duct duct1 = Duct.Create(m_rvtDoc, systemTypeId, ductType.Id, levelId, start, startOffset);
                Duct duct2 = Duct.Create(m_rvtDoc, systemTypeId, ductType.Id, levelId, startOffset, endOffset);

                // Copy parameters from pipe to other three created pipes.
                CopyParameters(duct, duct1);
                CopyParameters(duct, duct2);


                // Add the created three pipes to current section.
                section.Ducts.Add(duct1);
                section.Ducts.Add(duct2);


                // Create the first elbow to connect two neighbor pipes of "U" shape.
                Connector conn1 = FindConnector(duct1, startOffset);
                Connector conn2 = FindConnector(duct2, startOffset);
                m_rvtDoc.Create.NewElbowFitting(conn1, conn2);

                section.End1 = sectionLine.GetEndPoint(1);
                // Create the second elbow to connect another two neighbor pipes of "U" shape.
                //Connector conn3 = FindConnector(duct2, endOffset);


            }
            else if (m_AvoidObstructionType == EnumAvoidObstructionType.AvoidUp_ || m_AvoidObstructionType == EnumAvoidObstructionType.AvoidDn_)
            {
                side1 = null;
                Duct duct2 = Duct.Create(m_rvtDoc, systemTypeId, ductType.Id, levelId, startOffset, endOffset);
                Duct duct3 = Duct.Create(m_rvtDoc, systemTypeId, ductType.Id, levelId, endOffset, end);

                // Copy parameters from pipe to other three created pipes.
                CopyParameters(duct, duct2);
                CopyParameters(duct, duct3);

                // Add the created three pipes to current section.
                section.Ducts.Add(null);
                section.Ducts.Add(duct2);
                section.Ducts.Add(duct3);

                // Create the second elbow to connect another two neighbor pipes of "U" shape.
                Connector conn3 = FindConnector(duct2, endOffset);
                Connector conn4 = FindConnector(duct3, endOffset);
                m_rvtDoc.Create.NewElbowFitting(conn3, conn4);

                section.Start1 = sectionLine.GetEndPoint(0);
            }
            else
            {
                Duct duct1 = Duct.Create(m_rvtDoc, systemTypeId, ductType.Id, levelId, start, startOffset);
                Duct duct2 = Duct.Create(m_rvtDoc, systemTypeId, ductType.Id, levelId, startOffset, endOffset);
                Duct duct3 = Duct.Create(m_rvtDoc, systemTypeId, ductType.Id, levelId, endOffset, end);
             

                // Copy parameters from pipe to other three created pipes.
                CopyParameters(duct, duct1);
                CopyParameters(duct, duct2);
                CopyParameters(duct, duct3);

                // Add the created three pipes to current section.
                section.Ducts.Add(duct1);
                section.Ducts.Add(duct2);
                section.Ducts.Add(duct3);

                /*
                Util.CreateModelLine(m_rvtDoc, section.Start, section.End, new Color(0,255,0));
                Util.CreateModelLine(m_rvtDoc, start, startOffset);
                Util.CreateModelLine(m_rvtDoc, startOffset, endOffset);
                Util.CreateModelLine(m_rvtDoc, endOffset, end);*/



                // Create the first elbow to connect two neighbor pipes of "U" shape.
                Connector conn1 = FindConnector(duct1, startOffset);
                Connector conn2 = FindConnector(duct2, startOffset);
                m_rvtDoc.Create.NewElbowFitting(conn1, conn2);

                // Create the second elbow to connect another two neighbor pipes of "U" shape.
                Connector conn3 = FindConnector(duct2, endOffset);
                Connector conn4 = FindConnector(duct3, endOffset);

                m_rvtDoc.Create.NewElbowFitting(conn3, conn4);

            }
        }


        /// <summary>
        /// ��ֹ��� ȸ���ϱ� ���� ��θ� ã�´�.
        /// </summary>
        /// <param name="pipe">ȸ�ǿ��(������)</param>
        /// <param name="section">�������� ���θ� �����ϴ� Section</param>
        private void Resolve(Pipe pipe, Section section)
        {
            //Util.CreateModelLine(m_rvtDoc, section.Start, section.End);
            KDCSIntersectorElement iePipe = new KDCSIntersectorElement(pipe);

            var pipeHeight = iePipe.Height;
            var section_len = section.Start.DistanceTo(section.End);
            if (section_len < pipeHeight * 2.5)
            {
                section.Inflate(0, pipeHeight);
                section.Inflate(1, pipeHeight);
            }

            // ��ֹ��� ���� �� �ִ� ������ �߽ɼ��� ������ ���� ã�´�.
            double dstOffset = 0d; //  ȸ�ǿ�� �߽ɿ��� ���������� ũ��(����)
            Line offset = null;

            if (section.IsMerged)
            {
                offset = FindRoute(pipe, section, section.BasePlane, ref dstOffset);
                XYZ v1 = (offset.GetEndPoint(0) - section.Start);
                double hgt = v1.GetLength();
                v1 = v1.Normalize();
                XYZ p1 = Util.Project(section.BasePlane, section.Start);
                XYZ p2 = Util.Project(section.BasePlane, section.End);
                offset = Line.CreateBound(p1 + v1 * hgt, p2 + v1 * hgt);

            }
            else offset = FindRoute(pipe, section, null, ref dstOffset);


            XYZ offset_start = offset.GetEndPoint(0) - offset.Direction * Unit.MMToFeet(UpDownFreeSpaceHeight);
            XYZ offset_end = offset.GetEndPoint(1) + offset.Direction * Unit.MMToFeet(UpDownFreeSpaceHeight);

            offset = Line.CreateBound(offset_start, offset_end);

            // ����
            Line pipeLine = iePipe.Line;
            XYZ sectionStart = pipeLine.Project(offset.GetEndPoint(0)).XYZPoint;
            XYZ sectionEnd = pipeLine.Project(offset.GetEndPoint(1)).XYZPoint;
            Line sectionLine = Line.CreateBound(sectionStart, sectionEnd);
            XYZ dir = offset.Direction;


            //sectionStart = sectionStart - sectionLine.Direction * Unit.MMToFeet(UpDownFreeSpaceHeight);
            //sectionEnd = sectionEnd + sectionLine.Direction * Unit.MMToFeet(UpDownFreeSpaceHeight);
            sectionLine = Line.CreateBound(sectionStart, sectionEnd);



            //Util.CreateModelLine(m_rvtDoc, offset.GetEndPoint(0), offset.GetEndPoint(1)); 
            double radUpdownAng = Util.DTR(UpDownAngle);    // �������� ����
            double r1 = dstOffset / Math.Sin(radUpdownAng);
            double x_offset = r1 * Math.Cos(radUpdownAng);


            XYZ ptStart = sectionLine.GetEndPoint(0) - dir * x_offset;
            XYZ ptEnd = sectionLine.GetEndPoint(1) + dir * x_offset;
            section.Start1 = ptStart;
            section.End1 = ptEnd;
            // Construct two side lines, which can avoid the obstruction too.
            Line side1 = Line.CreateBound(ptStart, offset.GetEndPoint(0));
            Line side2 = Line.CreateBound(offset.GetEndPoint(1), ptEnd);


            //
            // Create an "U" shape, which connected with three pipes and two elbows, to round the obstruction.
            //
            PipeType pipeType = pipe.PipeType;
            Autodesk.Revit.DB.XYZ start = side1.GetEndPoint(0);
            Autodesk.Revit.DB.XYZ startOffset = offset.GetEndPoint(0);
            Autodesk.Revit.DB.XYZ endOffset = offset.GetEndPoint(1);
            Autodesk.Revit.DB.XYZ end = side2.GetEndPoint(1);

            var parameter = pipe.get_Parameter(BuiltInParameter.RBS_START_LEVEL_PARAM);
            var levelId = parameter.AsElementId();
            // Create three side pipes of "U" shape.
            //var systemTypeId = m_pipingSystemType.Id;
            var systemTypeId = pipe.MEPSystem.GetTypeId();


            if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Up || m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Dn)
            {
                side2 = null;
                Pipe pipe1 = Pipe.Create(m_rvtDoc, systemTypeId, pipeType.Id, levelId, start, startOffset);
                Pipe pipe2 = Pipe.Create(m_rvtDoc, systemTypeId, pipeType.Id, levelId, startOffset, endOffset);

                // Copy parameters from pipe to other three created pipes.
                CopyParameters(pipe, pipe1);
                CopyParameters(pipe, pipe2);


                // Add the created three pipes to current section.
                section.Pipes.Add(pipe1);
                section.Pipes.Add(pipe2);


                // Create the first elbow to connect two neighbor pipes of "U" shape.
                Connector conn1 = FindConnector(pipe1, startOffset);
                Connector conn2 = FindConnector(pipe2, startOffset);
                m_rvtDoc.Create.NewElbowFitting(conn1, conn2);

                section.End1 = sectionLine.GetEndPoint(1);
                // Create the second elbow to connect another two neighbor pipes of "U" shape.
                //Connector conn3 = FindConnector(duct2, endOffset);


            }
            else if (m_AvoidObstructionType == EnumAvoidObstructionType.AvoidUp_ || m_AvoidObstructionType == EnumAvoidObstructionType.AvoidDn_)
            {
                side1 = null;
                Pipe pipe2 = Pipe.Create(m_rvtDoc, systemTypeId, pipeType.Id, levelId, startOffset, endOffset);
                Pipe pipe3 = Pipe.Create(m_rvtDoc, systemTypeId, pipeType.Id, levelId, endOffset, end);

                // Copy parameters from pipe to other three created pipes.
                CopyParameters(pipe, pipe2);
                CopyParameters(pipe, pipe3);

                // Add the created three pipes to current section.
                section.Pipes.Add(null);
                section.Pipes.Add(pipe2);
                section.Pipes.Add(pipe3);

                // Create the second elbow to connect another two neighbor pipes of "U" shape.
                Connector conn3 = FindConnector(pipe2, endOffset);
                Connector conn4 = FindConnector(pipe3, endOffset);
                m_rvtDoc.Create.NewElbowFitting(conn3, conn4);

                section.Start1 = sectionLine.GetEndPoint(0);
            }
            else
            {
                Pipe pipe1 = Pipe.Create(m_rvtDoc, systemTypeId, pipeType.Id, levelId, start, startOffset);
                Pipe pipe2 = Pipe.Create(m_rvtDoc, systemTypeId, pipeType.Id, levelId, startOffset, endOffset);
                Pipe pipe3 = Pipe.Create(m_rvtDoc, systemTypeId, pipeType.Id, levelId, endOffset, end);

                //Util.CreateModelLine(m_rvtDoc, start, startOffset);
                //Util.CreateModelLine(m_rvtDoc, startOffset, endOffset);
                //Util.CreateModelLine(m_rvtDoc, endOffset, end);
                // Copy parameters from pipe to other three created pipes.
                CopyParameters(pipe, pipe1);
                CopyParameters(pipe, pipe2);
                CopyParameters(pipe, pipe3);

                // Add the created three pipes to current section.
                section.Pipes.Add(pipe1);
                section.Pipes.Add(pipe2);
                section.Pipes.Add(pipe3);

                // Create the first elbow to connect two neighbor pipes of "U" shape.
                Connector conn1 = FindConnector(pipe1, startOffset);
                Connector conn2 = FindConnector(pipe2, startOffset);
                m_rvtDoc.Create.NewElbowFitting(conn1, conn2);

                // Create the second elbow to connect another two neighbor pipes of "U" shape.
                Connector conn3 = FindConnector(pipe2, endOffset);
                Connector conn4 = FindConnector(pipe3, endOffset);
                m_rvtDoc.Create.NewElbowFitting(conn3, conn4);

            }
        }



        /// <summary>
        /// ��ֹ��� ȸ���ϱ� ���� ��θ� ã�´�.
        /// </summary>
        /// <param name="duct">ȸ�ǿ��(���̺�Ʈ����)</param>
        /// <param name="section">���̺�Ʈ������ ���θ� �����ϴ� Section</param>
        private void Resolve(CableTray cableTray, Section section)
        {

            KDCSIntersectorElement ieCableTray = new KDCSIntersectorElement(cableTray);
            var ductHeight = ieCableTray.Height;
            var section_len = section.Start.DistanceTo(section.End);
            if (section_len < ductHeight * 2.5)
            {
                section.Inflate(0, ductHeight);
                section.Inflate(1, ductHeight);
            }


            // ��ֹ��� ���� �� �ִ� ��Ʈ �߽ɼ��� ������ ���� ã�´�.
            double dstOffset = 0d; //  ȸ�ǿ�� �߽ɿ��� ���������� ũ��(����)
            Line offset = null;


            if (section.IsMerged)
            {
                offset = FindRoute(cableTray, section, section.BasePlane, ref dstOffset);
                XYZ v1 = (offset.GetEndPoint(0) - section.Start);
                double hgt = v1.GetLength();
                v1 = v1.Normalize();
                XYZ p1 = Util.Project(section.BasePlane, section.Start);
                XYZ p2 = Util.Project(section.BasePlane, section.End);
                offset = Line.CreateBound(p1 + v1 * hgt, p2 + v1 * hgt);

            }
            else offset = FindRoute(cableTray, section, null, ref dstOffset);



            // ����
            Line ductLine = ieCableTray.Line;
            XYZ sectionStart = ductLine.Project(offset.GetEndPoint(0)).XYZPoint;
            XYZ sectionEnd = ductLine.Project(offset.GetEndPoint(1)).XYZPoint;
            Line sectionLine = Line.CreateBound(sectionStart, sectionEnd);
            XYZ dir = offset.Direction;


            //Util.CreateModelLine(m_rvtDoc, offset.GetEndPoint(0), offset.GetEndPoint(1)); 
            double radUpdownAng = Util.DTR(UpDownAngle);  // �������� ����
            double r1 = dstOffset / Math.Sin(radUpdownAng);
            double x_offset = r1 * Math.Cos(radUpdownAng);


            XYZ ptStart = sectionLine.GetEndPoint(0) - dir * x_offset;
            XYZ ptEnd = sectionLine.GetEndPoint(1) + dir * x_offset;
            section.Start1 = ptStart;
            section.End1 = ptEnd;
            // Construct two side lines, which can avoid the obstruction too.
            Line side1 = Line.CreateBound(ptStart, offset.GetEndPoint(0));
            Line side2 = Line.CreateBound(offset.GetEndPoint(1), ptEnd);


            //
            // Create an "U" shape, which connected with three pipes and two elbows, to round the obstruction.
            //
            ElementId idCableTrayType = cableTray.GetTypeId();// Util.FindCableTrayTypeId(m_rvtDoc, "Default");
            Autodesk.Revit.DB.XYZ start = side1.GetEndPoint(0);
            Autodesk.Revit.DB.XYZ startOffset = offset.GetEndPoint(0);
            Autodesk.Revit.DB.XYZ endOffset = offset.GetEndPoint(1);
            Autodesk.Revit.DB.XYZ end = side2.GetEndPoint(1);

            var parameter = cableTray.get_Parameter(BuiltInParameter.RBS_START_LEVEL_PARAM);
            var levelId = parameter.AsElementId();
            double bendRadius = 0.32808399; // 100mm

            // Create three side pipes of "U" shape.          
            if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Up || m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Dn)
            {
                side2 = null;
                CableTray cableTray1 = CableTray.Create(m_rvtDoc, idCableTrayType, start, startOffset, levelId);
                CableTray cableTray2 = CableTray.Create(m_rvtDoc, idCableTrayType, startOffset, endOffset, levelId);

                // Copy parameters from pipe to other three created pipes.
                CopyParameters(cableTray, cableTray1);
                CopyParameters(cableTray, cableTray2);


                // Add the created three pipes to current section.
                section.CableTrays.Add(cableTray1);
                section.CableTrays.Add(cableTray2);


                // Create the first elbow to connect two neighbor pipes of "U" shape.
                Connector conn1 = FindConnector(cableTray1, startOffset);
                Connector conn2 = FindConnector(cableTray2, startOffset);
                FamilyInstance fi = m_rvtDoc.Create.NewElbowFitting(conn1, conn2);
                if (fi != null)
                {
                    //fi.get_Parameter(BuiltInParameter.RBS_CABLETRAY_BENDRADIUS).Set(bendRadius);
                    //fi.LookupParameter("Ʈ���� ����").Set(0.082021); // 25mm ����
                }


                section.End1 = sectionLine.GetEndPoint(1);
                // Create the second elbow to connect another two neighbor pipes of "U" shape.
                //Connector conn3 = FindConnector(duct2, endOffset);


            }
            else if (m_AvoidObstructionType == EnumAvoidObstructionType.AvoidUp_ || m_AvoidObstructionType == EnumAvoidObstructionType.AvoidDn_)
            {
                side1 = null;
                CableTray cableTray2 = CableTray.Create(m_rvtDoc, idCableTrayType, startOffset, endOffset, levelId);
                CableTray cableTray3 = CableTray.Create(m_rvtDoc, idCableTrayType, endOffset, end, levelId);

                // Copy parameters from pipe to other three created pipes.
                CopyParameters(cableTray, cableTray2);
                CopyParameters(cableTray, cableTray3);


                // Add the created three pipes to current section.
                section.CableTrays.Add(null);
                section.CableTrays.Add(cableTray2);
                section.CableTrays.Add(cableTray3);


                // Create the second elbow to connect another two neighbor pipes of "U" shape.
                Connector conn3 = FindConnector(cableTray2, endOffset);
                Connector conn4 = FindConnector(cableTray3, endOffset);
                var fi = m_rvtDoc.Create.NewElbowFitting(conn3, conn4);
                if (fi != null)
                {
                    //fi.get_Parameter(BuiltInParameter.RBS_CABLETRAY_BENDRADIUS).Set(bendRadius);
                    //fi.LookupParameter("Ʈ���� ����").Set(0.082021); // 25mm ����
                }


                section.Start1 = sectionLine.GetEndPoint(0);
            }
            else
            {
                CableTray cableTray1 = CableTray.Create(m_rvtDoc, idCableTrayType, start, startOffset, levelId);
                CableTray cableTray2 = CableTray.Create(m_rvtDoc, idCableTrayType, startOffset, endOffset, levelId);
                CableTray cableTray3 = CableTray.Create(m_rvtDoc, idCableTrayType, endOffset, end, levelId);

                // Copy parameters from pipe to other three created pipes.
                CopyParameters(cableTray, cableTray1);
                CopyParameters(cableTray, cableTray2);
                CopyParameters(cableTray, cableTray3);

                // Add the created three pipes to current section.
                section.CableTrays.Add(cableTray1);
                section.CableTrays.Add(cableTray2);
                section.CableTrays.Add(cableTray3);


                //Util.CreateModelLine(m_rvtDoc, section.Start, section.End, new Color(0, 255, 0));
                //Util.CreateModelLine(m_rvtDoc, start, startOffset);
               // Util.CreateModelLine(m_rvtDoc, startOffset, endOffset);
                //Util.CreateModelLine(m_rvtDoc, endOffset, end);


                // Create the first elbow to connect two neighbor pipes of "U" shape.
                Connector conn1 = FindConnector(cableTray1, startOffset);
                Connector conn2 = FindConnector(cableTray2, startOffset);
                if (conn1 != null && conn2 != null)
                {
                    conn1.ConnectTo(conn2);
                    var fi = m_rvtDoc.Create.NewElbowFitting(conn1, conn2); //"failed to insert elbow":
                    if (fi != null)
                    {
                        //fi.get_Parameter(BuiltInParameter.RBS_CABLETRAY_BENDRADIUS).Set(bendRadius);
                        //fi.LookupParameter("Ʈ���� ����").Set(0.082021); // 25mm ����

                    }
                }

                // Create the second elbow to connect another two neighbor pipes of "U" shape.
                Connector conn3 = FindConnector(cableTray2, endOffset);
                Connector conn4 = FindConnector(cableTray3, endOffset);
                if (conn3 != null && conn4 != null)
                {
                    conn3.ConnectTo(conn4);
                    var fi = m_rvtDoc.Create.NewElbowFitting(conn3, conn4); //"failed to insert elbow":
                    if (fi != null)
                    {
                        //fi.get_Parameter(BuiltInParameter.RBS_CABLETRAY_BENDRADIUS).Set(bendRadius);
                        // fi.LookupParameter("Ʈ���� ����").Set(0.082021); // 25mm ����                                                               
                    }
                }

            }
        }




        /// <summary>
        /// ��ֹ��� ȸ���ϱ� ���� ��θ� ã�´�.
        /// </summary>
        /// <param name="duct">ȸ�ǿ��(��Ʈ)</param>
        /// <param name="section">��Ʈ�� ���θ� �����ϴ� Section</param>
        private void Resolve(Conduit conduit, Section section)
        {
            KDCSIntersectorElement iePipe = new KDCSIntersectorElement(conduit);
            var pipeHeight = iePipe.Height;
            var section_len = section.Start.DistanceTo(section.End);
            if (section_len < pipeHeight * 2.5)
            {
                section.Inflate(0, pipeHeight);
                section.Inflate(1, pipeHeight);
            }


            var conduitTypeId = conduit.GetTypeId();

            // ��ֹ��� ���� �� �ִ� ��Ʈ �߽ɼ��� ������ ���� ã�´�.
            double dstOffset = 0d;  //  ȸ�ǿ�� �߽ɿ��� ���������� ũ��(����)
            Line offset = null;

            if (section.IsMerged)
            {
                offset = FindRoute(conduit, section, section.BasePlane, ref dstOffset);
                XYZ v1 = (offset.GetEndPoint(0) - section.Start);
                double hgt = v1.GetLength();
                v1 = v1.Normalize();
                XYZ p1 = Util.Project(section.BasePlane, section.Start);
                XYZ p2 = Util.Project(section.BasePlane, section.End);
                offset = Line.CreateBound(p1 + v1 * hgt, p2 + v1 * hgt);

            }
            else offset = FindRoute(conduit, section, null, ref dstOffset);





            // ����
            Line pipeLine = iePipe.Line;
            XYZ sectionStart = pipeLine.Project(offset.GetEndPoint(0)).XYZPoint;
            XYZ sectionEnd = pipeLine.Project(offset.GetEndPoint(1)).XYZPoint;
            Line sectionLine = Line.CreateBound(sectionStart, sectionEnd);
            XYZ dir = offset.Direction;


            //Util.CreateModelLine(m_rvtDoc, offset.GetEndPoint(0), offset.GetEndPoint(1)); 
            double radUpdownAng = Util.DTR(UpDownAngle);  // �������� ����
            double r1 = dstOffset / Math.Sin(radUpdownAng);
            double x_offset = r1 * Math.Cos(radUpdownAng);


            XYZ ptStart = sectionLine.GetEndPoint(0) - dir * x_offset;
            XYZ ptEnd = sectionLine.GetEndPoint(1) + dir * x_offset;
            section.Start1 = ptStart;
            section.End1 = ptEnd;
            // Construct two side lines, which can avoid the obstruction too.
            Line side1 = Line.CreateBound(ptStart, offset.GetEndPoint(0));
            Line side2 = Line.CreateBound(offset.GetEndPoint(1), ptEnd);


            //
            // Create an "U" shape, which connected with three pipes and two elbows, to round the obstruction.
            //

            Autodesk.Revit.DB.XYZ start = side1.GetEndPoint(0);
            Autodesk.Revit.DB.XYZ startOffset = offset.GetEndPoint(0);
            Autodesk.Revit.DB.XYZ endOffset = offset.GetEndPoint(1);
            Autodesk.Revit.DB.XYZ end = side2.GetEndPoint(1);

            var parameter = conduit.get_Parameter(BuiltInParameter.RBS_START_LEVEL_PARAM);
            var levelId = parameter.AsElementId();
            // Create three side pipes of "U" shape.
   


            if (m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Up || m_AvoidObstructionType == EnumAvoidObstructionType.Avoid_Dn)
            {
                side2 = null;
                Conduit conduit1 = Conduit.Create(m_rvtDoc, conduitTypeId, start, startOffset, levelId);
                Conduit conduit2 = Conduit.Create(m_rvtDoc, conduitTypeId, startOffset, endOffset, levelId);

                // Copy parameters from pipe to other three created pipes.
                CopyParameters(conduit, conduit1);
                CopyParameters(conduit, conduit2);


                // Add the created three pipes to current section.
                section.Conduits.Add(conduit1);
                section.Conduits.Add(conduit2);


                // Create the first elbow to connect two neighbor pipes of "U" shape.
                Connector conn1 = FindConnector(conduit1, startOffset);
                Connector conn2 = FindConnector(conduit2, startOffset);
                m_rvtDoc.Create.NewElbowFitting(conn1, conn2);

                section.End1 = sectionLine.GetEndPoint(1);
                // Create the second elbow to connect another two neighbor pipes of "U" shape.
                //Connector conn3 = FindConnector(duct2, endOffset);


            }
            else if (m_AvoidObstructionType == EnumAvoidObstructionType.AvoidUp_ || m_AvoidObstructionType == EnumAvoidObstructionType.AvoidDn_)
            {
                side1 = null;
                Conduit conduit2 = Conduit.Create(m_rvtDoc, conduitTypeId, startOffset, endOffset, levelId);
                Conduit conduit3 = Conduit.Create(m_rvtDoc, conduitTypeId, endOffset, end, levelId);

                // Copy parameters from pipe to other three created pipes.
                CopyParameters(conduit, conduit2);
                CopyParameters(conduit, conduit3);

                // Add the created three pipes to current section.
                section.Conduits.Add(null);
                section.Conduits.Add(conduit2);
                section.Conduits.Add(conduit3);

                // Create the second elbow to connect another two neighbor pipes of "U" shape.
                Connector conn3 = FindConnector(conduit2, endOffset);
                Connector conn4 = FindConnector(conduit3, endOffset);
                m_rvtDoc.Create.NewElbowFitting(conn3, conn4);

                section.Start1 = sectionLine.GetEndPoint(0);
            }
            else
            {
               /*
               Util.CreateModelLine(m_rvtDoc, section.Start, section.End, new Color(0,255,0));
               Util.CreateModelLine(m_rvtDoc, start, startOffset);
               Util.CreateModelLine(m_rvtDoc, startOffset, endOffset);
               Util.CreateModelLine(m_rvtDoc, endOffset, end);
                */
     

                Conduit conduit1 = Conduit.Create(m_rvtDoc, conduitTypeId, start, startOffset, levelId);
                Conduit conduit2 = Conduit.Create(m_rvtDoc, conduitTypeId, startOffset, endOffset, levelId);
                Conduit conduit3 = Conduit.Create(m_rvtDoc, conduitTypeId, endOffset, end, levelId);

                // Copy parameters from pipe to other three created pipes.
                CopyParameters(conduit, conduit1);
                CopyParameters(conduit, conduit2);
                CopyParameters(conduit, conduit3);

                // Add the created three pipes to current section.
                section.Conduits.Add(conduit1);
                section.Conduits.Add(conduit2);
                section.Conduits.Add(conduit3);
            
                // Create the first elbow to connect two neighbor pipes of "U" shape.
                Connector conn1 = FindConnector(conduit1, startOffset);
                Connector conn2 = FindConnector(conduit2, startOffset);
                m_rvtDoc.Create.NewElbowFitting(conn1, conn2);

                // Create the second elbow to connect another two neighbor pipes of "U" shape.
                Connector conn3 = FindConnector(conduit2, endOffset);
                Connector conn4 = FindConnector(conduit3, endOffset);
  
                m_rvtDoc.Create.NewElbowFitting(conn3, conn4);
            }
        }



        /// <summary>
        /// Copy parameters from source pipe to target pipe.
        /// </summary>
        /// <param name="source">Coping source</param>
        /// <param name="target">Coping target</param>
        private void CopyParameters(Pipe source, Pipe target)
        {
            double diameter = source.get_Parameter(BuiltInParameter.RBS_PIPE_DIAMETER_PARAM).AsDouble();
            target.get_Parameter(BuiltInParameter.RBS_PIPE_DIAMETER_PARAM).Set(diameter);
        }

        private void CopyParameters(Duct source, Duct target)
        {
            ConnectorProfileType shape = KDCS.Utils.Util.GetShape(source);
            if (shape == ConnectorProfileType.Round)
            {
                double diameter = source.get_Parameter(BuiltInParameter.RBS_CURVE_DIAMETER_PARAM).AsDouble();
                target.get_Parameter(BuiltInParameter.RBS_CURVE_DIAMETER_PARAM).Set(diameter);

            }
            else if (shape == ConnectorProfileType.Rectangular)
            {
               
                double width = source.get_Parameter(BuiltInParameter.RBS_CURVE_WIDTH_PARAM).AsDouble();
                target.get_Parameter(BuiltInParameter.RBS_CURVE_WIDTH_PARAM).Set(width);
                double height = source.get_Parameter(BuiltInParameter.RBS_CURVE_HEIGHT_PARAM).AsDouble();
                target.get_Parameter(BuiltInParameter.RBS_CURVE_HEIGHT_PARAM).Set(height);
            }
            else if (shape == ConnectorProfileType.Oval)
            {

                double width = source.get_Parameter(BuiltInParameter.RBS_CURVE_WIDTH_PARAM).AsDouble();
                target.get_Parameter(BuiltInParameter.RBS_CURVE_WIDTH_PARAM).Set(width);
                double height = source.get_Parameter(BuiltInParameter.RBS_CURVE_HEIGHT_PARAM).AsDouble();
                target.get_Parameter(BuiltInParameter.RBS_CURVE_HEIGHT_PARAM).Set(height);
            }


        }

        private void CopyParameters(CableTray source, CableTray target)
        {
            double width = source.get_Parameter(BuiltInParameter.RBS_CABLETRAY_WIDTH_PARAM).AsDouble();
            target.get_Parameter(BuiltInParameter.RBS_CABLETRAY_WIDTH_PARAM).Set(width);
            double height = source.get_Parameter(BuiltInParameter.RBS_CABLETRAY_HEIGHT_PARAM).AsDouble();
            target.get_Parameter(BuiltInParameter.RBS_CABLETRAY_HEIGHT_PARAM).Set(height);
        }

        private void CopyParameters(Conduit source, Conduit target)
        {
           
            target.get_Parameter(BuiltInParameter.RBS_CONDUIT_DIAMETER_PARAM).Set(source.Diameter);
            double od = source.get_Parameter(BuiltInParameter.RBS_CONDUIT_OUTER_DIAM_PARAM).AsDouble();
            Parameter odTP = target.get_Parameter(BuiltInParameter.RBS_CONDUIT_OUTER_DIAM_PARAM);
            if (odTP.IsReadOnly == false) odTP.Set(od);
            double id = source.get_Parameter(BuiltInParameter.RBS_CONDUIT_INNER_DIAM_PARAM).AsDouble();
            Parameter idTP = target.get_Parameter(BuiltInParameter.RBS_CONDUIT_INNER_DIAM_PARAM);
            if(idTP.IsReadOnly == false) idTP.Set(id);
        }




        /// <summary>
        /// Find out a connector from pipe with a specified point.
        /// </summary>
        /// <param name="pipe">Pipe to find the connector</param>
        /// <param name="conXYZ">Specified point</param>
        /// <returns>Connector whose origin is conXYZ</returns>
        private Connector FindConnector(Pipe pipe, Autodesk.Revit.DB.XYZ conXYZ)
        {
            ConnectorSet conns = pipe.ConnectorManager.Connectors;
            foreach (Connector conn in conns)
            {
                if (conn.Origin.IsAlmostEqualTo(conXYZ))
                {
                    return conn;
                }
            }
            return null;
        }


        private Connector FindConnector(Duct duct, Autodesk.Revit.DB.XYZ conXYZ)
        {
            ConnectorSet conns = duct.ConnectorManager.Connectors;
            foreach (Connector conn in conns)
            {
                if (conn.Origin.IsAlmostEqualTo(conXYZ))
                {
                    return conn;
                }
            }
            return null;
        }

        private Connector FindConnector(CableTray cabletray, Autodesk.Revit.DB.XYZ conXYZ)
        {
            ConnectorSet conns = cabletray.ConnectorManager.Connectors;
            foreach (Connector conn in conns)
            {
                if (conn.Origin.IsAlmostEqualTo(conXYZ))
                {
                    return conn;
                }
            }
            return null;
        }


        private Connector FindConnector(Conduit conduit, Autodesk.Revit.DB.XYZ conXYZ)
        {
            ConnectorSet conns = conduit.ConnectorManager.Connectors;
            foreach (Connector conn in conns)
            {
                if (conn.Origin.IsAlmostEqualTo(conXYZ))
                {
                    return conn;
                }
            }
            return null;
        }





        /// <summary>
        /// Find out the connector which the pipe's specified connector connected to.
        /// The pipe's specified connector is given by point conxyz.
        /// </summary>
        /// <param name="pipe">Pipe to find the connector</param>
        /// <param name="conXYZ">Specified point</param>
        /// <returns>Connector whose origin is conXYZ</returns>
        private Connector FindConnectedTo(Pipe pipe, Autodesk.Revit.DB.XYZ conXYZ)
        {
            Connector connItself = FindConnector(pipe, conXYZ);
            ConnectorSet connSet = connItself.AllRefs;
            foreach (Connector conn in connSet)
            {
                if (conn.Owner.Id.IntegerValue != pipe.Id.IntegerValue &&
                    conn.ConnectorType == ConnectorType.End)
                {
                    return conn;
                }
            }
            return null;
        }

        private Connector FindConnectedTo(Duct duct, Autodesk.Revit.DB.XYZ conXYZ)
        {
            Connector connItself = FindConnector(duct, conXYZ);
            ConnectorSet connSet = connItself.AllRefs;
            foreach (Connector conn in connSet)
            {
                if (conn.Owner.Id.IntegerValue != duct.Id.IntegerValue &&
                    conn.ConnectorType == ConnectorType.End)
                {
                    return conn;
                }
            }
            return null;
        }

        private Connector FindConnectedTo(CableTray cabletray, Autodesk.Revit.DB.XYZ conXYZ)
        {
            Connector connItself = FindConnector(cabletray, conXYZ);
            ConnectorSet connSet = connItself.AllRefs;
            foreach (Connector conn in connSet)
            {
                if (conn.Owner.Id.IntegerValue != cabletray.Id.IntegerValue &&
                    conn.ConnectorType == ConnectorType.End)
                {
                    return conn;
                }
            }
            return null;
        }
        private Connector FindConnectedTo(Conduit conduit, Autodesk.Revit.DB.XYZ conXYZ)
        {
            Connector connItself = FindConnector(conduit, conXYZ);
            ConnectorSet connSet = connItself.AllRefs;
            foreach (Connector conn in connSet)
            {
                if (conn.Owner.Id.IntegerValue != conduit.Id.IntegerValue &&
                    conn.ConnectorType == ConnectorType.End)
                {
                    return conn;
                }
            }
            return null;
        }
    }
 
}