/// <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);
}
}