Revit二次开发|区域标高不一致缩略图的实现

使用Revit出图时，往往会遇到项目地库标高不一致，在标注机电管线时，需要按照地库地面标高去标注，但地库地面标高又无法统一，需要手动取框选区域形成标高缩略图注明标高。

本文简单分享一下利用土建模型中的楼板实现缩略图的快速方法；

1、读取地库建筑面层的所有轮廓，筛选出建筑面层的范围线，利用范围线生成详图线；

2、新建常规注释类别的标高标记族，将建筑面层的标高赋值给常规注释族；

以下是所有代码：

 public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
 {
 UIApplication uiApp = commandData.Application;
 UIDocument uiDoc = uiApp.ActiveUIDocument;
 Document doc = uiDoc.Document;
 Selection sel = uiDoc.Selection;

 try {
 Transaction trans = new Transaction(doc);
 trans.Start("绘制详图线");
 FilteredElementCollector col = new FilteredElementCollector(uiDoc.Document);
 col.OfClass(typeof(FamilySymbol)).OfCategory(BuiltInCategory.OST_GenericAnnotation);
 FamilySymbol familySymbol = col.FirstElement() as FamilySymbol;
 FilteredElementCollector collector = new FilteredElementCollector(doc);
 ICollection<Element> floorcol = collector.OfClass(typeof(Floor)).ToElements();
 foreach (Element elem in floorcol) {
 Floor floor = elem as Floor;
 if (floor.Name.Contains("楼板"))
 {

 Level level = doc.GetElement(floor.LevelId) as Level;
 if (level.Name.Contains("B1") && level.Name.Contains("ST"))
 {
 //获得楼板的相对标高；
 double offset = floor.LookupParameter("自标高的高度偏移").AsDouble();
 double levelHeigh = (level.Elevation + offset) * 304.8/1000;
 string levelParam = levelHeigh.ToString("0.000");
 XYZ point = (floor.get_BoundingBox(doc.ActiveView).Max+floor.get_BoundingBox(doc.ActiveView).Min)/2;

 FamilyInstance instance = doc.Create.NewFamilyInstance(point, familySymbol, doc.ActiveView);

 Parameter parm = instance.LookupParameter("标高1");
 parm.Set(levelParam);

 GeometryElement geometry = floor.get_Geometry(new Options());
 foreach (GeometryObject geomObj in geometry)//获取到几何元素的边和面
 {
 Solid geomSolid = geomObj as Solid;
 if (null != geomSolid)
 {
 foreach (Face geoFace in geomSolid.Faces)
 {
 if (geoFace is PlanarFace) {
 PlanarFace plFace = geoFace as PlanarFace;

 //得到楼板面
 if (plFace.FaceNormal.Z == 1)
 {
 
 EdgeArray array = plFace.EdgeLoops.get_Item(0);

 foreach (Edge ed in array)
 {
 Curve curve = ed.AsCurve();
 
 doc.Create.NewDetailCurve(doc.ActiveView, curve);
 
 }
 }

 }
 
 }

 }


 }

 

 }


 }

 }
 trans.Commit();
 }
 catch (Autodesk.Revit.Exceptions.OperationCanceledException e) {
 return Result.Cancelled;


 }
 catch (Exception ex) {
 TaskDialog.Show("Revit",ex.Source+"n"+ex.Message+"n");

 return Result.Failed;
 }


 return Result.Succeeded;
 }

实际效果如下：

以上就是生成缩略图的简单方法，本方法对楼板的建模要求很高，如果土建模型楼板不完整或者重叠，需要手动取修改缩略图。

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