Revit开发BuildingEnvelopeAnalyzer_revit analyze in could-优快云博客

本文介绍RevitAPI中的BuildingEnvelopeAnalyzer类，该类利用射线投射和洪水填充算法来确定建筑外部可见的构件，并能查找封闭空间体积内的边界构件。

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Revit API 里有个BuildingEnvelopeAnalyzer类，帮助文档里对它描述如下：

This class uses a combination of ray-casting and flood-fill algorithms in order to find the building elements that are exposed to the outside of the building. This method can also look for the bounding building elements for enclosed space volumes inside the building.

大概意思就是说这个类可以获取在建筑外面的建筑构件，

下面是一个小测试，

            Document doc = commandData.Application.ActiveUIDocument.Document;
            BuildingEnvelopeAnalyzerOptions opt = new BuildingEnvelopeAnalyzerOptions();

            opt.AnalyzeEnclosedSpaceVolumes = true;
            opt.OptimizeGridCellSize = false;
            opt.GridCellSize = 1;

            BuildingEnvelopeAnalyzer analyzer = BuildingEnvelopeAnalyzer.Create(doc, opt);

            IList<LinkElementId> ids = analyzer.GetBoundingElements();

            List<ElementId> nids = ids.Select(m => m.HostElementId).ToList();

            UIDocument uidoc = new UIDocument(doc);
            uidoc.Selection.SetElementIds(nids);

            return Result.Succeeded;