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 );

        }

    }

}