Revit API在风管与墙相交处开洞

几何元素练习Solid,Edge,Face,

GeometryObject 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using WinForm = System.Windows.Forms;

using Autodesk.Revit.UI;
using Autodesk.Revit.DB;
using Autodesk.Revit.Attributes;

using Autodesk.Revit.DB.Mechanical;
using Autodesk.Revit.UI.Selection;
using Autodesk.Revit.ApplicationServices;

using Autodesk.Revit.DB.Structure;
using Autodesk.Revit.DB.ExtensibleStorage;

using System.Xml;

namespace RevitCodes
{
    [TransactionAttribute(Autodesk.Revit.Attributes.TransactionMode.Manual)]
    public class cmdOpening : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string messages, ElementSet elements)
        {
            UIApplication uiApp = commandData.Application;
            Document doc = uiApp.ActiveUIDocument.Document;
            Selection sel = uiApp.ActiveUIDocument.Selection;

            Transaction ts = new Transaction(doc, "http://revit.5d6d.com");
            ts.Start();
            //
            Face face = null;
            //选择一面墙
            Reference ref1 = uiApp.ActiveUIDocument.Selection.PickObject(Autodesk.Revit.UI.Selection.ObjectType.Element, "选择一面墙");
            Element elem1 = doc.GetElement(ref1);
            Wall wall = elem1 as Wall;
            //选择一个风管
            Reference ref2 = uiApp.ActiveUIDocument.Selection.PickObject(Autodesk.Revit.UI.Selection.ObjectType.Element, "选择一个风管");
            Element elem2 = doc.GetElement(ref2);
            Duct duct = elem2 as Duct;

            ////得到风管曲线
            IList<XYZ> list = new List<XYZ>();
            ConnectorSetIterator csi = duct.ConnectorManager.Connectors.ForwardIterator();
            while (csi.MoveNext())
            {
                Connector conn = csi.Current as Connector;
                list.Add(conn.Origin);
            }
            Curve curve = Line.get_Bound(list.ElementAt(0), list.ElementAt(1)) as Curve;

            Options opt = new Options();
            opt.ComputeReferences = true;
            opt.DetailLevel = Autodesk.Revit.DB.DetailLevels.Medium;
            //取得风管边线
            GeometryElement eDuct = duct.get_Geometry(opt);
            int i = 0;
            Curve curveOne = null;
            Curve curveTwo = null;
            foreach (GeometryObject obj in eDuct.Objects)
            {
                Solid solid = obj as Solid;
                foreach (Edge edge in solid.Edges)
                {
                    Curve curveEdge = edge.AsCurve();
                    Curve curveDuct = curve;
                    XYZ xyz1 = GetVector(curveEdge);
                    XYZ xyz2 = GetVector(curveDuct);
                    if (IsParallel(xyz1, xyz2))//与风管curve平行
                    {
                        if (i == 0)//求对角线
                            curveOne = curveEdge;
                        if (i == 2)
                            curveTwo = curveEdge;
                        i += 1;
                    }
                }
            }
            //取得墙曲线
            GeometryElement e = wall.get_Geometry(opt);
            foreach (GeometryObject obj in e.Objects)
            {
                Solid solid = obj as Solid;
                if (solid != null && solid.Faces.Size > 0)
                {
                    face = FindBigFace(solid);//面积最大的面作为墙的主面吧。
                }
            }

            //求交点1
            IntersectionResultArray intersectionR = new IntersectionResultArray();//交点集合
            SetComparisonResult comparisonR;//Comparison比较
            comparisonR = face.Intersect(curveOne, out intersectionR);
            XYZ intersectionResult = null;//交点坐标
            if (SetComparisonResult.Disjoint != comparisonR)//Disjoint不交
            {
                if (!intersectionR.IsEmpty)
                {
                    intersectionResult = intersectionR.get_Item(0).XYZPoint;
                }
            }
            //求交点2
            IntersectionResultArray intersectionR1 = new IntersectionResultArray();//交点集合
            SetComparisonResult comparisonR1;//Comparison比较
            comparisonR1 = face.Intersect(curveTwo, out intersectionR1);
            XYZ intersectionResult1 = null;//交点坐标
            if (SetComparisonResult.Disjoint != comparisonR1)//Disjoint不交
            {
                if (!intersectionR1.IsEmpty)
                {
                    intersectionResult1 = intersectionR1.get_Item(0).XYZPoint;
                }
            }
            doc.Create.NewOpening(wall, intersectionResult, intersectionResult1);

            ts.Commit();

            return Result.Succeeded;
        }

        //判断向量是否平行
        public bool IsParallel(XYZ firstVec, XYZ secondVec)
        {
            return (IsSameDirection(firstVec, secondVec) || IsOppositeDirection(firstVec, secondVec));
        }

        //求曲线向量
        public XYZ GetVector(Line line) { return line.get_EndPoint(1) - line.get_EndPoint(0); }
        public XYZ GetVector(Curve line) { return line.get_EndPoint(1) - line.get_EndPoint(0); }

        /// <summary>
        /// 判断两向量是否同向
        /// </summary>
        /// <param name="firstVec"></param>
        /// <param name="secondVec"></param>
        /// <returns></returns>
        public bool IsSameDirection(XYZ firstVec, XYZ secondVec)
        {
            XYZ first = firstVec.Normalize();
            XYZ second = secondVec.Normalize();

            double dot = first.DotProduct(second);
            return (IsEqual(dot, 1));
        }

        const double precision = 0.00001;    // 精度

        /// <summary>
        /// 判断两double数值是否相等
        /// </summary>
        /// <param name="d1"></param>
        /// <param name="d2"></param>
        /// <returns></returns>
        public static bool IsEqual(double d1, double d2)
        {
            double diff = Math.Abs(d1 - d2);
            return diff < precision;
        }

        /// <summary>
        /// 判断两向量是否反向
        /// </summary>
        /// <param name="firstVec"></param>
        /// <param name="secondVec"></param>
        /// <returns></returns>
        public static bool IsOppositeDirection(XYZ firstVec, XYZ secondVec)
        {
            XYZ first = firstVec.Normalize();
            XYZ second = secondVec.Normalize();

            double dot = first.DotProduct(second);
            return (IsEqual(dot, -1));
        }
        //求交点
        void FindInterFace(Solid solid, Curve curve)
        {
            foreach (Face face in solid.Faces)
            {
                //求交点
                IntersectionResultArray intersectionR = new IntersectionResultArray();//交点集合
                SetComparisonResult comparisonR;//Comparison比较
                comparisonR = face.Intersect(curve, out intersectionR);
                XYZ intersectionResult = null;//交点坐标
                if (SetComparisonResult.Disjoint != comparisonR)//Disjoint不交
                {
                    if (!intersectionR.IsEmpty)
                    {
                        intersectionResult = intersectionR.get_Item(0).XYZPoint;
                    }
                }
                if (intersectionResult != null)
                {
                    TaskDialog.Show("inter", intersectionResult.X + "," + intersectionResult.Y + "," + intersectionResult.Z);
                }
            }
        }
        //找到面积最大的面
        Face FindBigFace(Solid solid)
        {
            double maxArea = 0;
            Face maxFace = null;
            foreach (Face face in solid.Faces)
            {
                if (face.Area > maxArea)
                {
                    maxArea = face.Area;
                    maxFace = face;
                }
            }
            return maxFace;
        }
        //找到墙的下底面
        Face FindBottomFace(Solid solid)
        {
            PlanarFace pf = null;
            foreach (Face face in solid.Faces)
            {
                pf = face as PlanarFace;
                if (null != pf)
                {
                    if (Math.Abs(pf.Normal.X) < 0.01 && Math.Abs(pf.Normal.Y) < 0.01 && pf.Normal.Z < 0)
                    {
                        TaskDialog.Show("Wall Bottom Face", "Area is " + pf.Area.ToString() + "; Origin = (" + pf.Origin.X.ToString() + "  " + pf.Origin.Y.ToString() + "  " + pf.Origin.Z.ToString() + ")");

                        break;
                    }
                }
            }
            return pf;
        }
    }

}

from:http://revit.5d6d.com/thread-1296-1-1.html