Revit API 楼板开洞

start

[Transaction(TransactionMode.Manual)]
[Regeneration(RegenerationOption.Manual)]
public class cmdFloorOpening : IExternalCommand
{
    public Result Execute(ExternalCommandData cmdData, ref string msg, ElementSet elements)
    {
        UIDocument uiDoc = cmdData.Application.ActiveUIDocument;
        Document doc = uiDoc.Document;
        Selection sel = uiDoc.Selection;
        Autodesk.Revit.Creation.Application aCreate = cmdData.Application.Application.Create;

        Transaction ts = new Transaction(doc, "www");
        ts.Start();
        //楼板
        Reference refFloor = sel.PickObject(ObjectType.Element, "floor");
        Floor floor = doc.GetElement(refFloor) as Floor;
        Face face = FindFloorFace(floor);
        CurveArray curves = aCreate.NewCurveArray();
        //风管
        Reference refDuct = sel.PickObject(ObjectType.Element, "duct");
        Duct duct = doc.GetElement(refDuct) as Duct;
        Curve curve = FindDuctCurve(duct);
        //求交点
        XYZ xyz = FindFaceCurve(face, curve);
        /*开矩形洞*/
        XYZ xyz1 = xyz + new XYZ(1, 1, 0) * 200 / 304.8;
        XYZ xyz2 = xyz + new XYZ(1, -1, 0) * 200 / 304.8;
        XYZ xyz3 = xyz + new XYZ(-1, -1, 0) * 200 / 304.8;
        XYZ xyz4 = xyz + new XYZ(-1, 1, 0) * 200 / 304.8;
        Curve c1 = aCreate.NewLine(xyz1, xyz2, true);
        Curve c2 = aCreate.NewLine(xyz2, xyz3, true);
        Curve c3 = aCreate.NewLine(xyz3, xyz4, true);
        Curve c4 = aCreate.NewLine(xyz4, xyz1, true);
        curves.Append(c1);
        curves.Append(c2);
        curves.Append(c3);
        curves.Append(c4);

        /*开圆形洞
        double startAngle = 0;
        double midAngle = Math.PI;
        double endAngle = 2 * Math.PI;

        XYZ xAxis = XYZ.BasisX;
        XYZ yAxis = XYZ.BasisY;
        double radius = 180 / 304.8;

        Arc arc1 = aCreate.NewArc(xyz, radius, startAngle, midAngle, xAxis, yAxis);
        Arc arc2 = aCreate.NewArc(xyz, radius, midAngle, endAngle, xAxis, yAxis);

        curves.Append(arc1);
        curves.Append(arc2);*/

        doc.Create.NewOpening(floor, curves, true);

        ts.Commit();

        return Result.Succeeded;
    }
    //求线和面的交点
    public XYZ FindFaceCurve(Face face, Curve curve)
    {
        //求交点
        IntersectionResultArray intersectionR = new IntersectionResultArray();//交点集合
        SetComparisonResult comparisonR;//Comparison比较
        comparisonR = face.Intersect(curve, out intersectionR);
        XYZ intersectionResult = null;//交点坐标
        if (SetComparisonResult.Disjoint != comparisonR)//Disjoint不交
        {
            if (!intersectionR.IsEmpty)
            {
                intersectionResult = intersectionR.get_Item(0).XYZPoint;
            }
        }
        return intersectionResult;
    }
    //找到风管对应的曲线
    public Curve FindDuctCurve(Duct duct)
    {
        //得到风管曲线
        IList<XYZ> list = new List<XYZ>();
        ConnectorSetIterator csi = duct.ConnectorManager.Connectors.ForwardIterator();
        while (csi.MoveNext())
        {
            Connector conn = csi.Current as Connector;
            list.Add(conn.Origin);
        }
        Curve curve = Line.get_Bound(list.ElementAt(0), list.ElementAt(1)) as Curve;
        curve.MakeUnbound();
        return curve;
    }
    //找到楼板的面
    public Face FindFloorFace(Floor floor)
    {
        Face normalFace = null;
        //
        Options opt = new Options();
        opt.ComputeReferences = true;
        opt.DetailLevel = Autodesk.Revit.DB.DetailLevels.Medium;
        //
        GeometryElement e = floor.get_Geometry(opt);
        /*下版改进
        IEnumerator<GeometryObject> enm = e.GetEnumerator();
        while (enm.MoveNext())
        {
            Solid solid = enm.Current as Solid;
        }*/
        foreach (GeometryObject obj in e.Objects)//待改2013
        {
            Solid solid = obj as Solid;
            if (solid != null && solid.Faces.Size > 0)
            {
                foreach (Face face in solid.Faces)
                {
                    PlanarFace pf = face as PlanarFace;
                    if (pf != null)
                    {
                        if (pf.Normal.AngleTo(new XYZ(0, 0, -1)) < 0.01)//数值在0到PI之间
                        {
                            normalFace = face;
                        }
                    }
                }
            }
        }
        return normalFace;
    }
}

url:http://greatverve.cnblogs.com/p/revit-api-FloorOpening.html