[摘要] 通过Revit二次开发实现对平行轴网的快速标注。交互操作是框选轴网->点选尺寸标注出现的位置->生成两道尺寸标注。 要达到设想的结果
通过Revit二次开发实现对平行轴网的快速标注。交互操作是框选轴网->点选尺寸标注出现的位置->生成两道尺寸标注。
要达到设想的结果一些地方需要特殊考虑：
框选操作容易误选轴网，起码要把与所选轴网不平行的轴网过滤出来。选用了第二步操作所选点的最近轴网作为轴网平行的参考基准。遍历所有框选的轴网，如果轴网与基准轴网的向量相同或相反，则判定为平行轴网；
外侧的尺寸标注需要标识最外侧的两根轴网，取得外侧两根轴网的方法也比较简单，遍历轴网，判断另外的轴网是否都在这根轴网的左边，或者都不在这根轴网的左边，即可获得最外侧的两根轴网；
在不同的视图比例下，尺寸标注的字体高度是不一样的，所以需要读取字体高度，根据当前视图的比例，计算出内侧尺寸标注的合适位置。
以下代码：
class QGridDimension : IExternalCommand { public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements) { UIDocument uidoc = commandData.Application.ActiveUIDocument; Document doc = uidoc.Document; //获取轴网类型 DimensionType dimType = null; FilteredElementCollector elems = new FilteredElementCollector(doc); foreach (DimensionType dt in elems.OfClass(typeof(DimensionType))) { if (dt.Name =="轴网尺寸标注") { dimType = dt; //dimensionGrid(uidoc, dt); break; } } if (dimType != null) { Document document = uidoc.Document; IList<Element> grids = uidoc.Selection.PickElementsByRectangle(new GridFilter(),"框选轴网"); if (grids.Count > 1) { XYZ selPoint = uidoc.Selection.PickPoint(ObjectSnapTypes.None,"选择尺寸定位位置"); View activeView = uidoc.ActiveView; ReferenceArray referenceArray1 = new ReferenceArray(); ReferenceArray referenceArray2 = new ReferenceArray(); //获得最靠近选择点的轴网为参照基准 List<Grid> lineGrid = new List<Grid>(); Line referenceLine = null; double dis = double.MaxValue; foreach (Grid g in grids) { double d = g.Curve.Distance(selPoint); Line line = g.Curve as Line; if (line != null) { lineGrid.Add(g); if (d < dis) { referenceLine = line; dis = d; } } } //获得内侧尺寸标注的引用 foreach (Grid g in lineGrid) { Line line = g.Curve as Line; if (line.Direction.IsAlmostEqualTo(referenceLine.Direction) || line.Direction.IsAlmostEqualTo(referenceLine.Direction.Multiply(-1))) { referenceArray1.Append(new Reference(g)); } } //获取外侧尺寸标注的引用 foreach (Reference refGrid in referenceArray1) { Grid g = doc.GetElement(refGrid) as Grid; Line line = g.Curve as Line; XYZ point1 = line.GetEndPoint(0); XYZ point2 = line.GetEndPoint(1); int i = 0; foreach (Reference _refGrid in referenceArray1) { Grid _g = doc.GetElement(_refGrid) as Grid; Line _line = _g.Curve as Line; //XYZ point1 = _line.GetEndPoint(0); //XYZ point2 = _line.GetEndPoint(1); XYZ point = _line.GetEndPoint(0); if (PointOnTheLeft(point1, point2, point)) { i += 1; } } if (i == 0 || i == referenceArray1.Size - 1) { referenceArray2.Append(new Reference(g)); } } //计算尺寸标注位置 XYZ lineDir = referenceLine.Direction.CrossProduct(new XYZ(0, 0, 1)); XYZ point_s = referenceLine.GetEndPoint(0); XYZ point_e = referenceLine.GetEndPoint(1); if (point_s.DistanceTo(selPoint) > point_e.DistanceTo(selPoint)) { XYZ temPoint = point_s; point_s = point_e; point_e = temPoint; } XYZ offsetDir = point_e - point_s; double lenght = dimType.get_Parameter(BuiltInParameter.TEXT_SIZE).AsDouble(); Line line_o = Line.CreateUnbound(selPoint, lineDir); Line line_i = Line.CreateUnbound(selPoint + offsetDir.Normalize() * lenght * activeView.Scale * 1.9, lineDir); //创建尺寸标注 using (Transaction tran = new Transaction(document,"轴网尺寸标注")) { tran.Start(); document.Create.NewDimension(activeView, line_o, referenceArray2, dimType); document.Create.NewDimension(activeView, line_i, referenceArray1, dimType); tran.Commit(); } } } else { TaskDialog.Show("err","未有轴网尺寸标注类型"); } return Result.Succeeded; } bool PointOnTheLeft(XYZ point1, XYZ point2, XYZ point) { double r = (point1.X - point2.X) / (point1.Y - point2.Y) * (point.Y - point2.Y) + point2.X; if (r > point.X) { return true; } return false; } } internal class GridFilter : ISelectionFilter { public bool AllowElement(Element elem) { if (elem is Grid) { return true; } return false; } public bool AllowReference(Reference reference, XYZ position) { return true; } }
