revit二次开发之批量旋转

批量旋转所使用的ISET<ElementId>中的元素是ElementInstance的Id，使用Family或FamilySymbol均不可以

public static void SelectionFamily(Autodesk.Revit.DB.Document document,XYZ p1,double rotating, ISet<ElementId> elementIds)
{
    Transaction transaction = new Transaction(document);

    transaction.Start("旋转");

    XYZ p2 = new XYZ(p1.X, p1.Y, 100);

    //创建旋转轴
    Line line = Line.CreateBound(p1, p2);  

    foreach (ElementId id in elementIds)
    {
        FamilyInstanceFilter familyInstanceFilter = new FamilyInstanceFilter(document, id);
        FilteredElementCollector elements = new FilteredElementCollector(document);
        elements = elements.WherePasses(familyInstanceFilter);
        elements.Distinct();
        foreach (FamilyInstance element in elements)
        {
            ElementTransformUtils.RotateElement(document, element.Id, line, rotating);

        }

    }
    transaction.Commit();
}

困扰我的最大问题就是旋转角度,测试了好几个小时终于在无意中发现使用的角度为弧度制;

public static double rotating(UIDocument uiDocument, double[] p1)
{
    MessageBox.Show("选择方向点");

    XYZ p2 = Grid(uiDocument);

　　//  此处P1获得的坐标被我换算成了mm，所以此处/304.8在换算成英尺，单位统一后计算
　　//Atan2是反三角函数，返回的是弧度制的角度
　　
    double angleOfLine = Math.Atan2(p2.Y-p1[1]/304.8,p2.X - p1[0]/304.8);

    return angleOfLine;

}