/// <summary>
/// 射线法获取房间吊顶高度，单位foot
/// </summary>
/// <param name="room"></param>
/// <param name="pointInRoom">房间内一点，请确保该点在房间下楼板和上天花板内，否则计算值错误</param>
/// <param name="currDocument">当前文件，射线法需要用到</param>
/// <returns></returns>
public static double GetRoomCeilingHeightByRay(this Room room, XYZ pointInRoom, Document currDocument)
{
if (room.Document.IsLinked && currDocument == null)
{
throw new InvalidOperationException("如果房间是链接文件中的房间，必须传递当前文件currDocument参数");
}
ElementFilter elementFilter;
ReferenceIntersector referenceIntersector;
//向上找天花板
elementFilter = new ElementCategoryFilter(BuiltInCategory.OST_Ceilings);
//射线法需要的三维视图，很关键，找不好就会找不到想要的结果
FilteredElementCollector collector = new FilteredElementCollector(currDocument);
//待改进
var view3D = collector.OfClass(typeof(View3D)).Cast <View3D>().FirstOrDefault <View3D>(v3 => !(v3.IsTemplate));
referenceIntersector = RevitExtensions.GetReferenceIntersector(
view3D,
room.Document.IsLinked,
findReferenceTarget: FindReferenceTarget.All,
targetElementIds: null,
elementFilter: elementFilter);
var topReference = referenceIntersector.FindNearest(pointInRoom, XYZ.BasisZ);
if (topReference == null)
{
return(double.NaN);
}
//向下找楼板
elementFilter = new ElementCategoryFilter(BuiltInCategory.OST_Floors);
referenceIntersector.SetFilter(elementFilter);
var bottomReference = referenceIntersector.FindNearest(pointInRoom, XYZ.BasisZ.Negate());
if (bottomReference == null)
{
return(double.NaN);
}
return(topReference.Proximity + bottomReference.Proximity);
}
private static Element GetSegmentElementByRay(Document document, Curve segmentCure, bool isCounterclockwise)
{
double stepInRoom = 0.1;
XYZ direction = (segmentCure.GetEndPoint(1) - segmentCure.GetEndPoint(0)).Normalize();
var leftDirection = new XYZ(-direction.Y, direction.X, direction.Z);
XYZ upDir = 1 * XYZ.BasisZ;
XYZ toRoomVec = isCounterclockwise ? stepInRoom * leftDirection : stepInRoom *leftDirection.Negate();
XYZ pointBottomInRoom = segmentCure.Evaluate(0.5, true) + toRoomVec;
XYZ startPoint = pointBottomInRoom + upDir;
XYZ toWallDir = isCounterclockwise ? leftDirection.Negate() : leftDirection;
//默认过滤 墙 柱子 门 幕墙嵌板
var filters = new List <ElementFilter> {
new ElementCategoryFilter(BuiltInCategory.OST_Walls),
new ElementCategoryFilter(BuiltInCategory.OST_Columns),
new ElementCategoryFilter(BuiltInCategory.OST_Doors),
new ElementCategoryFilter(BuiltInCategory.OST_CurtainWallPanels), //幕墙嵌板
};
var orFilter = new LogicalOrFilter(filters);
//射线法需要的三维视图，很关键，找不好就会找不到想要的结果
FilteredElementCollector collector = new FilteredElementCollector(document);
//待改进
var view3D = collector.OfClass(typeof(View3D)).Cast <View3D>().FirstOrDefault <View3D>(v3 => !(v3.IsTemplate));
var referenceIntersector = RevitExtensions.GetReferenceIntersector(
view3D,
true,
findReferenceTarget: FindReferenceTarget.All,
targetElementIds: null,
elementFilter: orFilter);
var reference = referenceIntersector.FindNearest(startPoint, toWallDir);
Element boundaryElement = null;
if (reference != null && reference.Proximity < MathHelper.Eps + stepInRoom)
{
boundaryElement = reference.GetElementByReferenceWithContext(document);
}
return(boundaryElement);
}