revit二次开发——从族实例中取得几何信息

1、可以从族实例中获得面、获得边、获得线、获得点，方法如下

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using Autodesk.Revit.UI;

using Autodesk.Revit.DB;

using Autodesk.Revit.UI.Selection;

using Autodesk.Revit.ApplicationServices;

namespace 从族实例中获得几何信息

{

    [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]

    [Autodesk.Revit.Attributes.Journaling(Autodesk.Revit.Attributes.JournalingMode.NoCommandData)]

    [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]

    public class Class1 : IExternalCommand

    {

        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)

        {

            Document revitDoc = commandData.Application.ActiveUIDocument.Document;  //取得文档

            Application revitApp = commandData.Application.Application;             //取得应用程序

            UIDocument uiDoc = commandData.Application.ActiveUIDocument;

            Selection sel = uiDoc.Selection;

            Reference ref1 = sel.PickObject(ObjectType.Element, "选择一个族实例");

            Element elem = revitDoc.GetElement(ref1);

            FamilyInstance familyInstance = elem as FamilyInstance;

            Options opt = new Options();

            opt.ComputeReferences = true;

            opt.DetailLevel = ViewDetailLevel.Fine;

            GeometryElement e = familyInstance.get_Geometry(opt);

           

            foreach (GeometryObject obj in e)

            {

                    GeometryInstance geoInstance = obj as GeometryInstance;

                    GeometryElement geoElement = geoInstance.GetInstanceGeometry();

                    Transform insTransform = geoInstance.Transform;

                    foreach (GeometryObject obj2 in geoElement)

                    {

                           Solid solid2 = obj2 as Solid;

                         if (solid2.Faces.Size > 0)

                         {

                        //FindBottomFace(solid2);

                        //FindEdge(solid2);

                        //FindLine(solid2);

                        //FindPoint(solid2);

                        transformPointAndUaPoint(solid2, insTransform);

                        TaskDialog.Show("呵呵", "在这里");

                         }                      

                    }               

            }

            return Result.Succeeded;

        }

        /// <summary>

        /// 得到最底下的边的面积和原点坐标

        /// </summary>

        /// <param name="solid"></param>

        /// <returns></returns>

        Face FindBottomFace(Solid solid)

        {

            PlanarFace pf = null;

            foreach (Face face in solid.Faces)

            {

                pf = face as PlanarFace;

                if (null != pf)

                {

                    if (Math.Abs(pf.FaceNormal.X) < 0.01 && Math.Abs(pf.FaceNormal.Y) < 0.01 && pf.FaceNormal.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;

        }

        /// <summary>

        /// 通过curve得到12个边的长度

        /// </summary>

        /// <param name="solid"></param>

        public void FindEdge(Solid solid)

        {

            string strParamInfo = null;

            foreach (Edge e in solid.Edges)

            {

                strParamInfo += e.ApproximateLength + "\n";

            }

            TaskDialog.Show("REVIT", strParamInfo);

        }

        /// <summary>

        /// 通过Line得到12个边的长度

        /// </summary>

        /// <param name="solid"></param>

        public void FindLine(Solid solid)

        {

            string strParamInfo = null;

            foreach (Edge e in solid.Edges)

            {

                Line line = e.AsCurve() as Line;

                strParamInfo += line.ApproximateLength + "\n";

            }

            TaskDialog.Show("REVIT", strParamInfo);

        }

        /// <summary>

        /// 通过curve或者line找到点

        /// </summary>

        /// <param name="solid"></param>

        public void FindPoint(Solid solid)

        {

            string strParamInfo1 = null;

            string strParamInfo2 = null;

            //string strParamInfo3 = null;

            foreach (Edge e in solid.Edges)

            {

                foreach(XYZ ii in e.Tessellate())

                {

                    XYZ point = ii;

                    strParamInfo1+=ii.X +","+ii.Y+","+ii.Z+ "\n";

                   

                 }

                Line line = e.AsCurve() as Line;

                foreach (XYZ ii in line.Tessellate())

                {

                    XYZ point = ii;

                    strParamInfo2 += ii.X + "," + ii.Y + "," + ii.Z + "\n";

                }

               

            }

            TaskDialog.Show("通过curve找到点的坐标", strParamInfo1);

            TaskDialog.Show("通过line找到点的坐标", strParamInfo2);

        }

        public void transformPointAndUaPoint(Solid solid,Transform insTransform)

        {

            string strParamInfo1 = null;

            string strParamInfo2 = null;

            //string strParamInfo3 = null;

            foreach (Edge e in solid.Edges)

            {

                foreach (XYZ ii in e.Tessellate())

                {

                    XYZ point = ii;

                    strParamInfo1 += point.X + "," + point.Y + "," + point.Z + "\n";

                    XYZ transformPoint = insTransform.OfPoint(point);

                    strParamInfo2 += transformPoint.X + "," + transformPoint.Y + "," + transformPoint.Z + "\n";

                }             

            }

            TaskDialog.Show("未经transform过转换的坐标", strParamInfo1);

            TaskDialog.Show("经过transform转换的坐标系", strParamInfo2);

        }

    }

}