/// <summary> /// 判断给定点 pt 是否在折线上: 1:在折线上;0:不在折线上 /// </summary> /// <param name="pt">待判断的点</param> /// <param name="polyline">线坐标列表</param> /// <param name="allowError">容差值(该值应包括线的宽度,如为零则表示精确匹配)</param> /// <returns>1:在折线上;0:不在折线上</returns> public static int PtInPolyLine(Point2d pt, Point2d l1, Point2d l2, double allowError) { //如果选择的点与当前点重合 if (Math.Abs(l2.X - pt.X) <= allowError && Math.Abs(l2.Y - pt.Y) <= allowError) { return(1); } if (Math.Min(l1.X, l2.X) <= pt.X && Math.Min(l1.Y, l2.Y) <= pt.Y && Math.Max(l1.X, l2.X) >= pt.X && Math.Max(l1.Y, l2.Y) >= pt.Y) { //精确匹配判断的话 if (Math.Abs(allowError - 0.0) <= 0.0001) { Point2d tp1 = new Point2d(l2.X - pt.X, l2.Y - pt.Y); //矢量减法 Point2d tp2 = new Point2d(pt.X - l1.X, pt.Y - l1.Y); //矢量减法 if (Math.Abs(Math.Abs(tp1.X * tp2.Y - tp2.X * tp1.Y) - 0.0) <= 0.00000001) //矢量叉乘,平行四边形的面积 { return(1); } } else { if (Math.Abs(l2.X - l1.X) <= allowError && Math.Abs(l2.X - pt.X) <= allowError) { return(1); } if (Math.Abs(l2.Y - l1.Y) <= allowError && Math.Abs(l2.Y - pt.Y) <= allowError) { return(1); } if (MethodCommand.DistancePointToSegment(pt, l1, l2) <= allowError) { return(1); } //如果点到线段的距离在容差范围内,则选取成功 if (MethodCommand.DistancePointToSegment(pt, l1, l2) <= allowError) { return(1); } } } return(0); }
public RoadInfoItemModel GetRoadItemInfo(Polyline line, List <DBText> txtList, List <Polyline> sectionLineList, List <DBText> sectionTextList) { RoadInfoItemModel item = new RoadInfoItemModel(); item.RoadLength = line.Length.ToString(); item.RoadWidth = line.ConstantWidth.ToString(); item.RoadType = "polyline"; item.ColorIndex = line.ColorIndex == 256 ? MethodCommand.GetLayerColorByID(line.LayerId) : System.Drawing.ColorTranslator.ToHtml(line.Color.ColorValue); item.roadList = PolylineMethod.GetPolyLineInfoPt(line); Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; using (Transaction tran = db.TransactionManager.StartTransaction()) { int vtnum = line.NumberOfVertices; for (int i = 0; i < vtnum - 1; i++) { foreach (DBText mText in txtList) { if (item.RoadName != null) { break; } Point2d pt = mText.AlignmentPoint.Convert2d(new Plane()); if (PolylineMethod.PtInPolyLine(pt, line.GetPoint2dAt(i), line.GetPoint2dAt(i + 1), 20) == 1) { item.RoadName = mText.TextString.Replace(" ", "").Replace(" ", ""); item.RoadNameLocaiton = new List <System.Drawing.PointF>(); item.sectionList = new List <RoadSectionItemModel>(); double middleLen = MethodCommand.DistancePointToPoint(mText.Position, mText.AlignmentPoint); double textLen = MethodCommand.GetEndLengthByTheorem(middleLen, mText.Height / 2) * 2; double partLength = textLen / item.RoadName.Length; for (int j = 1; j < item.RoadName.Length + 1; j++) { item.RoadNameLocaiton.Add(MethodCommand.GetEndPointByTrigonometricHu(mText.Rotation, MethodCommand.Point3d2Pointf(mText.Position), partLength * j)); } item.RoadNameLayer = mText.Layer; item.RoadNameType = "text"; break; } } //获取横截面 foreach (Polyline pl in sectionLineList) { for (int j = 0; j < pl.NumberOfVertices; j++) { double dic = MethodCommand.DistancePointToSegment(pl.GetPoint2dAt(j), line.GetPoint2dAt(i), line.GetPoint2dAt(i + 1)); if (dic < 60) { RoadSectionItemModel modelsc = new RoadSectionItemModel(); modelsc.Line = AutoCad2ModelTools.Polyline2Model(pl); DBText secMtext = MethodCommand.FindMTextIsInPolyineForPipe(pl, sectionTextList); if (secMtext != null) { modelsc.SectionName = AutoCad2ModelTools.DbText2Model(secMtext); } item.sectionList.Add(modelsc); } } } } item.isDashed = MethodCommand.GetLayerLineTypeByIDEx(line); item.individualName = ""; item.individualFactor = ""; item.individualCode = ""; item.individualStage = ""; // 增加个体编码、个体要素、个体名称 System.Data.DataTable tb = Method.AutoGenerateNumMethod.GetAllPolylineNumsEx(line); if (tb.Rows != null && tb.Rows.Count > 0) { foreach (System.Data.DataRow row in tb.Rows) { if ((string)row["多段线id"] == line.Id.Handle.Value.ToString()) { item.individualName = (string)row["个体名称"]; item.individualFactor = (string)row["个体要素"]; item.individualCode = (string)row["个体编码"]; item.individualStage = (string)row["个体阶段"]; } } } return(item); } }