revit 碰撞检测相关

之前用的方法是由房间边界构成的Solid，计算与该Solid相交的Element,然后判断是否为墙。相对来说这个方法比较通用，可以检索出房间的楼板、窗户等各种构件。

SpatialElementBoundaryOptions se=new SpatialElementBoundaryOptions();
se.SpatialElementBoundaryLocation = SpatialElementBoundaryLocation.Center;
SpatialElementGeometryCalculator calculator =new SpatialElementGeometryCalculator(document,se);
Solid solid = calculator.CalculateSpatialElementGeometry(room)?.GetGeometry();
var list = new FilteredElementCollector(document).WhereElementIsNotElementType().
WherePasses(new ElementIntersectsSolidFilter(solid)).ToList();
foreach (var element in list)
{
Wall wall=element as Wall;
if (wall!=null)
{
wallsOfRoom.Add(wall);
}
}

只是找墙的话，其实用BoundarySegment.ElementId,就可以直接得到构成这个边界部分的元素（墙）。

IList<IList<BoundarySegment>> loops =room.GetBoundarySegments(new SpatialElementBoundaryOptions());

foreach (IList<BoundarySegment> loop in loops)

{
foreach (BoundarySegment segment in loop)
{
Wall wall =document.GetElement(segment.ElementId) as Wall;
if (wall != null)
{
wallsOfRoom.Add(wall);
}
}
}

• 碰撞检测：

  using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using System.Threading.Tasks;
  using Autodesk.Revit.UI;
  using Autodesk.Revit.Attributes;
  using Autodesk.Revit.DB;
  using Autodesk.Revit.UI.Selection;//类Selection使用
  namespace Collision
  {
  [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;
  Document doc = uiDoc.Document;
  Transaction trans = new Transaction(doc,"Excomm");
  trans.Start();
  Selection select = uiDoc.Selection;
  Reference r = select.PickObject(ObjectType.Element, "选择需要检查的墙");
  Element column = doc.GetElement(r);
  FilteredElementCollector collect = new FilteredElementCollector(doc);
  //ElementIntersectionFilter冲突检查
  ElementIntersectsElementFilter iFilter = new ElementIntersectsElementFilter(column,false);
  collect.WherePasses(iFilter);
  List<ElementId> excludes = new List<ElementId>();
  excludes.Add(column.Id);
  collect.Excluding(excludes);
  List<ElementId> ids = new List<ElementId>();
  select.SetElementIds(ids);
  foreach(Element elem in collect)//遍历每一个元素
  {
  ids.Add(elem.Id);//将elem的Id添加到List中
  }
  select.SetElementIds(ids);
  trans.Commit();
  return Result.Succeeded;
  }
  }
  }
  

  筛选出和该元素相交的元素之BoundingBoxIntersectsFilter

  //假设元素为ee

  BoundingBoxXYZ box = ee.get_BoundingBox(doc.ActiveView);
  //创建outline,通过boundingboxintersect过滤器
  Outline myOutLn = new Outline(box.Min, box.Max);
  BoundingBoxIntersectsFilter boxee = new BoundingBoxIntersectsFilter(myOutLn);
  FilteredElementCollector collector = new FilteredElementCollector(doc);

  //过滤出相交元素，假设用到的是板类型

  IList<Element> elements = collector.OfClass(typeof(Floor)).WherePasses(boxee).ToElements();