public static void FindTouchedEdge(ObjectId[] polylineIds)
{
if (polylineIds.Length != 2)
{
return;
}
//var ids = CadUtils.FindAllPolylines(Application.DocumentManager.MdiActiveDocument);
var database = Application.DocumentManager.MdiActiveDocument.Database;
using (var tr = database.TransactionManager.StartTransaction())
{
var reader = new DwgReader();
var entity1 = tr.GetObject(polylineIds[0], OpenMode.ForRead) as Curve;
var lineString1 = reader.ReadCurveAsLineString(tr, entity1);
lineString1.UserData = polylineIds[0];
var entity2 = tr.GetObject(polylineIds[1], OpenMode.ForRead) as Curve;
var lineString2 = reader.ReadCurveAsLineString(tr, entity2);
lineString2.UserData = polylineIds[1];
var isTouch = lineString1.Touches(lineString2);
System.Diagnostics.Trace.WriteLine(isTouch);
IGeometry intersections = lineString1.Intersection(lineString2);
//IGeometry intersections = CommonUtils.GetIntersectionPoints(lineString, polygon1);
if (intersections.Coordinates.Any())
{
foreach (var Coordinate in intersections.Coordinates)
{
var dbpoint = new DBPoint(new Point3d(Coordinate.X, Coordinate.Y, 0));
CadUtils.DrawPoint(tr, database, dbpoint);
}
// Draw all
var d = new DBPoint(new Point3d(intersections.Coordinates[0].X, intersections.Coordinates[0].Y, 0));
CadUtils.DrawPoint(tr, database, d, 2);
var lastIndex = intersections.Coordinates[intersections.Coordinates.Length - 1];
var d1 = new DBPoint(new Point3d(lastIndex.X,
lastIndex.Y, 0));
CadUtils.DrawPoint(tr, database, d1, 2);
}
tr.Commit();
}
}
public static bool IsCcw(Curve curve, Transaction tr)
{
var reader = new DwgReader();
var geomerty = reader.ReadCurveAsLineString(tr, curve);
/*
* This check catches cases where the ring contains an A-B-A configuration of points.
* This can happen if the ring does not contain 3 distinct points
* (including the case where the input array has fewer than 4 elements),
* or it contains coincident line segments.
*/
if (geomerty.CoordinateSequence.Count < 3) // To avoid exception from CGAlgorithms.IsCCW routine
{
return(false);
}
return(CGAlgorithms.IsCCW(geomerty.CoordinateSequence));
}
public static Dictionary <ObjectId, IList <Point3d> > LineStringSelfIntersectionsOp(IList <ObjectId> objectIds)
{
var dictionary = new Dictionary <ObjectId, IList <Point3d> >();
var database = objectIds[0].Database;
using (var tr = database.TransactionManager.StartTransaction())
{
var reader = new DwgReader();
foreach (ObjectId objectId in objectIds)
{
if (!objectId.IsValid)
{
continue;
}
var curve = tr.GetObject(objectId, OpenMode.ForRead) as Curve;
var geom = reader.ReadCurveAsLineString(tr, curve) as LineString;
var intersectGeom = LineStringSelfIntersectionsOp(geom);
var points = new List <Point3d>();
foreach (var coordinate in intersectGeom.Coordinates)
{
// 如果是NaN直接设定为0
if (double.IsNaN(coordinate.Z))
{
coordinate.Z = 0;
}
points.Add(new Point3d(coordinate.X, coordinate.Y, coordinate.Z));
}
dictionary.Add(objectId, points);
}
tr.Commit();
}
return(dictionary);
}
public static void FindDanglingLine(Database database)
{
var polylineIds = CadUtils.FindAllPolylines(Application.DocumentManager.MdiActiveDocument);
using (var tr = database.TransactionManager.StartTransaction())
{
var pmFixed3 = new PrecisionModel(3);
// 读入多边形数据
var lineStringList = new List <IGeometry>();
foreach (ObjectId polylineId in polylineIds)
{
var curve = tr.GetObject(polylineId, OpenMode.ForRead) as Curve;
var reader = new DwgReader();
IGeometry lineString;
try
{
lineString = reader.ReadCurveAsPolygon(tr, curve) as Polygon;
}
catch (Exception)
{
lineString = reader.ReadCurveAsLineString(tr, curve) as LineString;
}
if (lineString != null && lineString.IsEmpty == false)
{
lineString = SimpleGeometryPrecisionReducer.Reduce(lineString, pmFixed3);
lineStringList.Add(lineString);
}
}
// 开始做Union
var nodedLineString = UnaryUnionOp.Union(lineStringList);
var polygonizer = new Polygonizer();
polygonizer.Add(nodedLineString);
var polys = polygonizer.GetPolygons();
var dangles = polygonizer.GetDangles();
var cuts = polygonizer.GetCutEdges();
var writer = new DwgWriter();
var modelSpaceId = SymbolUtilityServices.GetBlockModelSpaceId(database);
var blockTableRecord = (BlockTableRecord)tr.GetObject(modelSpaceId, OpenMode.ForWrite, false);
// 悬挂线
foreach (ILineString lineString in dangles)
{
//if (lineString != null)
//{
// var polyline = writer.WritePolyline(lineString);
// polyline.ColorIndex = 3;
// //polyline.Layer = "";
// // 输出到CAD
// blockTableRecord.AppendEntity(polyline);
// tr.AddNewlyCreatedDBObject(polyline, true);
//}
}
tr.Commit();
}
}
