Revit Family API 创建参考平面

使用API来编辑族时，使用doc.FamilyCreate.NewReferencePlane();创建参考平面。

//Revit Family API 创建参考平面
[TransactionAttribute(Autodesk.Revit.Attributes.TransactionMode.Manual)]
public class cmdCreateReferencePlane : IExternalCommand
{
    //添加垂直参考平面(Family API)，通过平面上两点与向量。
    void AddReferencePlane_VerticalOffset(Document doc, View view)
    {
        XYZ pt1 = new XYZ(-0.5, -2.0, 0.0);
        XYZ pt2 = new XYZ(-0.5, 2.0, 0.0);
        XYZ vec = XYZ.BasisZ;
        ReferencePlane refPlane = doc.FamilyCreate.NewReferencePlane(pt1, pt2, vec, view);
        refPlane.Name = "OffsetV";
    }
    //添加水平参考平面(Family API)，通过平面上两点与向量。
    void AddReferencePlane_HorizontalOffset(Document doc, View view)
    {
        XYZ pt1 = new XYZ(2.0, -0.5, 0.0);
        XYZ pt2 = new XYZ(-2.0, -0.5, 0.0);
        XYZ vec = XYZ.BasisZ;
        ReferencePlane refPlane = doc.FamilyCreate.NewReferencePlane(pt1, pt2, vec, view);
        refPlane.Name = "OffsetH";
    }
    //使用三个点来确定参考平面
    void AddReferencePlane_VerticalOffset2(Document doc)
    {
        XYZ pt1 = new XYZ(-0.5, -2.0, 0.0);
        XYZ pt2 = new XYZ(-0.5, 2.0, 0.0);
        XYZ pt3 = new XYZ(-0.5, -1.0, 1.0);
        View view = findElement(doc, typeof(ViewPlan), "Lower Ref. Level") as View;
        if (view != null)
        {
            ReferencePlane refPlane = doc.FamilyCreate.NewReferencePlane2(pt1, pt2, pt3, view);
            refPlane.Name = "OffsetV";
        }
    }
    public Result Execute(ExternalCommandData commandData, ref string messages, ElementSet elements)
    {
        UIApplication app = commandData.Application;
        Document doc = app.ActiveUIDocument.Document;
        Selection sel = app.ActiveUIDocument.Selection;

        Transaction ts = new Transaction(doc, "CreateReferencePlane");
        ts.Start();
        //垂直参考平面
        AddReferencePlane_VerticalOffset(doc, doc.ActiveView);
        //AddReferencePlane_VerticalOffset2(doc);
        //水平参考平面
        AddReferencePlane_HorizontalOffset(doc, doc.ActiveView);

        ts.Commit();

        return Result.Succeeded;
    }
    //通过类型与名称找Element
    Element findElement(Document _rvtDoc, Type targetType, string targetName)
    {
        // get the elements of the given type
        //
        FilteredElementCollector collector = new FilteredElementCollector(_rvtDoc);
        collector.WherePasses(new ElementClassFilter(targetType));

        // parse the collection for the given name
        // using LINQ query here. 
        // 
        var targetElems = from element in collector where element.Name.Equals(targetName) select element;
        List<Element> elems = targetElems.ToList<Element>();

        if (elems.Count > 0)
        {  // we should have only one with the given name. 
            return elems[0];
        }

        // cannot find it.
        return null;
    }
}

from:http://greatverve.cnblogs.com/p/NewReferencePlane.html