[Revit二次开发] 轴网交点创建柱子

项目完整代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using Autodesk.Revit.UI;//IExternalCommand用
using Autodesk.Revit.DB;//Document用
using Autodesk.Revit.Attributes; //TransactionAttribute和RegenerationAttribute
using Autodesk.Revit.DB.Structure;//StructuralType.NonStructural用

namespace GridPractise
{
    [TransactionAttribute(TransactionMode.Manual)]
    [RegenerationAttribute(RegenerationOption.Manual)]

    public class Class1 : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            UIDocument uidoc = commandData.Application.ActiveUIDocument;//定义用户文件夹
            Document revitDoc = uidoc.Document; //将uidoc转换为Document
            FilteredElementCollector coll = new FilteredElementCollector(revitDoc);//创建元素过滤收集器
            ElementClassFilter gridFilter = new ElementClassFilter(typeof(Grid));//过滤类型为轴网的元素

            List<Element> grid = coll.WherePasses(gridFilter).ToElements().ToList();//创建轴网
            List<Line> gridLines = new List<Line>();//创建轴线
            List<XYZ> intPos = new List<XYZ>();//创建交点

            foreach(Grid gri in grid)
            {
                gridLines.Add(gri.Curve as Line); //将轴网转换为线
            }

            foreach(Line ln1 in gridLines)//找到第一根线
            {
                foreach(Line ln2 in gridLines)//找到第二根线
                {
                    XYZ normal1 = ln1.Direction;
                    XYZ normal2 = ln2.Direction;
                    if (normal1.IsAlmostEqualTo(normal2))
                        continue; //如果两根轴线方向相同,则遍历下一组
                    IntersectionResultArray results;
                    SetComparisonResult intRst = ln1.Intersect(ln2, out results);//如果两根轴线相交,则输出交点

                    if(intRst == SetComparisonResult.Overlap && results.Size  == 1)//出去重复的交点
                    {
                        XYZ tp = results.get_Item(0).XYZPoint;//获取不重复的点
                        if(intPos.Where(m=>m.IsAlmostEqualTo(tp)).Count() == 0)
                        {
                            intPos.Add(tp); //收集所有的交点
                        }
                    }
                }
            }

            //在交点处创建柱子

            Level level =  revitDoc.GetElement(new ElementId(510300)) as Level;//定义轴网,其Id为510300（以自己创建的轴网Id为准）
            FamilySymbol familysymbol = revitDoc.GetElement(new ElementId(510872)) as FamilySymbol;//定义柱子,其Id为52557

            using (Transaction trans = new Transaction(revitDoc))
            {
                trans.Start("dfs");
                if (!familysymbol.IsActive)
                    familysymbol.Activate();//设为Activate状态

                foreach (XYZ p in intPos)
                {
                    //创建柱子
                    FamilyInstance familyInstance = revitDoc.Create.NewFamilyInstance(p, familysymbol, level, StructuralType.NonStructural);
                }
                trans.Commit();
            }
                return Result.Succeeded;
        }
    }
}
效果：
在这里插入图片描述
参考资料：
周婧祎《Autodesk Revit 2016二次开发入门教程》
[Revit二次开发] 轴网交点创建柱子

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