这个demo实现了轴线的交点创建柱子功能，纯属娱乐和学习。不足之处请各路大神指教
using System; using System.Collections.Generic; using Autodesk.Revit.UI; using Autodesk.Revit.DB; using Autodesk.Revit.Attributes; using Autodesk.Revit.UI.Selection; using Autodesk.Revit.DB.Mechanical; using Autodesk.Revit.DB.Plumbing; using Autodesk.Revit.DB.Electrical; using System.Threading; using System.Linq; using System.Runtime.InteropServices; namespace 插件1 { [Autodesk.Revit.Attributes.Transaction(TransactionMode.Manual)] [Autodesk.Revit.Attributes.Regeneration(RegenerationOption.Manual)] [Autodesk.Revit.Attributes.Journaling(JournalingMode.UsingCommandData)] public class Command : IExternalCommand { public readonly double unit = 304.8; public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elementSet) { UIApplication uiapp = new UIApplication(commandData.Application.Application); UIDocument uidoc = commandData.Application.ActiveUIDocument; Document doc = uidoc.Document; Selection selection = uidoc.Selection; List<Grid> xGrid = new List<Grid>(); List<Grid> yGrid = new List<Grid>(); List<XYZ> points = new List<XYZ>(); List<Reference> reffs = (selection.PickObjects(ObjectType.Element,new GridFilter(),"请选择所有的轴线")).ToList(); foreach(Reference item in reffs) { Grid grid = doc.GetElement(item) as Grid; if(grid!=null) { Line line = grid.Curve as Line; if(line!=null) { XYZ dir = line.Direction; if(dir.Y.Equals(-1)||dir.Y.Equals(1)) { yGrid.Add(grid); } else if(dir.X.Equals(-1)||dir.X.Equals(1)) { xGrid.Add(grid); } } } else { continue; } } foreach(Grid grx in xGrid) { foreach(Grid gry in yGrid) { XYZ res = Command.GetIntersectPoint(grx, gry); if (res == null) continue; points.Add(res); } } // 过滤出一个柱子的族类型 ElementId columnTypeId = new FilteredElementCollector(doc).OfCategory(BuiltInCategory.OST_Columns).OfClass(typeof(FamilySymbol)).ToElementIds().First(); FamilySymbol fmSymbol = doc.GetElement(columnTypeId) as FamilySymbol; // 过滤出一个默认的标高 Level level = new FilteredElementCollector(doc).OfCategory(BuiltInCategory.OST_Levels).OfClass(typeof(Level)).ToList<Element>().FirstOrDefault() as Level; using (Transaction ts = new Transaction(doc,"创建柱子")) { ts.Start(); if(!fmSymbol.IsActive) { fmSymbol.Activate(); } foreach(XYZ ptn in points) { doc.Create.NewFamilyInstance(ptn, fmSymbol, level, Autodesk.Revit.DB.Structure.StructuralType.NonStructural); } ts.Commit(); } return Result.Succeeded; } // 获得两个轴线的交点 public static XYZ GetIntersectPoint(Grid grid1,Grid grid2) { Line line1 = grid1.Curve as Line; Line line2 = grid2.Curve as Line; IntersectionResultArray res; line1.Intersect(line2, out res); XYZ point = res.get_Item(0).XYZPoint; return point; } } // 用户只能选择轴线 public class GridFilter : ISelectionFilter { public bool AllowElement(Element elem) { return elem is Grid ? true : false; } public bool AllowReference(Reference reference, XYZ position) { return false; } } }