public static void Touch(ObjectId[] polylineIds)
{
var database = polylineIds[0].Database;
using (var tr = database.TransactionManager.StartTransaction())
{
foreach (var polylineId in polylineIds)
{
var curve = tr.GetObject(polylineId, OpenMode.ForRead) as Curve;
// 读取CAD图元
var reader = new DwgReader();
var lineString = reader.ReadGeometry(curve, tr) as LineString;
//lineString.Touches()
// 做出缓冲区
var geometry = LineStringSelfIntersectionsOp(lineString);
if (geometry.GeometryType == "Point")
{
var writer = new DwgWriter();
DBPoint dbPt = writer.WriteDbPoint(geometry as Point);
CadUtils.DrawPoint(tr, database, dbPt);
}
}
tr.Commit();
}
}
public static void CreateBuffer(ObjectId polylineId, double bufferDist)
{
var database = polylineId.Database;
using (var tr = database.TransactionManager.StartTransaction())
{
var curve = tr.GetObject(polylineId, OpenMode.ForRead) as Curve;
// 读取CAD图元
var reader = new DwgReader();
var lineString = reader.ReadGeometry(curve, tr) as LineString;
// 做出缓冲区
var buffer = lineString.Buffer(bufferDist) as Geometry;
if (buffer.GeometryType == "Polygon")
{
var writer = new DwgWriter();
Polyline[] polylines = writer.WritePolyline(buffer as IPolygon);
// 输出到CAD
foreach (var polyline in polylines)
{
CadUtils.AddToCurrentDb(tr, database, polyline);
}
}
tr.Commit();
}
}
public static Point3d?GetCentroid(Entity entity, Transaction tr)
{
Point3d?result = null;
var reader = new DwgReader();
var geomerty = reader.ReadGeometry(entity, tr);
var coords = NetTopologySuite.Algorithm.Centroid.GetCentroid(geomerty);
if (coords != null)
{
result = new Point3d(coords.X, coords.Y, coords.Z);
}
return(result);
}
public static IList <Point3d> GetMinimumDiameterRectangle(Entity entity, Transaction tr)
{
var reader = new DwgReader();
var geomerty = reader.ReadGeometry(entity, tr);
var diameter = new NetTopologySuite.Algorithm.MinimumDiameter(geomerty);
var rectangle = diameter.GetMinimumRectangle();
var coordinates = new List <Point3d>();
foreach (var coordinate in rectangle.Coordinates)
{
var point = new Point3d(coordinate.X, coordinate.Y, 0);
coordinates.Add(point);
}
return(coordinates);
}
public static void LineStringSelfIntersections(ObjectId polylineId)
{
var database = polylineId.Database;
using (var tr = database.TransactionManager.StartTransaction())
{
var curve = tr.GetObject(polylineId, OpenMode.ForRead) as Curve;
// 读取CAD图元
var reader = new DwgReader();
var lineString = reader.ReadGeometry(curve, tr) as LineString;
// 做出缓冲区
var geometry = LineStringSelfIntersectionsOp(lineString);
if (geometry == null || geometry.IsEmpty)
{
return;
}
var writer = new DwgWriter();
var modelSpaceId = SymbolUtilityServices.GetBlockModelSpaceId(database);
var blockTableRecord = (BlockTableRecord)tr.GetObject(modelSpaceId, OpenMode.ForWrite, false);
if (geometry.GeometryType == "Point")
{
DBPoint dbPt = writer.WriteDbPoint(geometry as Point);
var mode = (short)Application.GetSystemVariable("pdmode");
if (mode == 0)
{
Application.SetSystemVariable("pdmode", 99);
}
dbPt.ColorIndex = 1;
// 输出到CAD
blockTableRecord.AppendEntity(dbPt);
tr.AddNewlyCreatedDBObject(dbPt, true);
}
else if (geometry.GeometryType == "MultiPoint")
{
var multipPoint = geometry as MultiPoint;
if (multipPoint == null)
{
return;
}
var dbPoints = writer.WriteDbPoints(multipPoint);
foreach (DBPoint dbPt in dbPoints)
{
var mode = (short)Application.GetSystemVariable("pdmode");
if (mode == 0)
{
Application.SetSystemVariable("pdmode", 99);
}
dbPt.ColorIndex = 1;
// 输出到CAD
blockTableRecord.AppendEntity(dbPt);
tr.AddNewlyCreatedDBObject(dbPt, true);
}
}
tr.Commit();
}
}
public static List <ObjectId> SplitPolygon(ObjectId plineId, ObjectId lineId)
{
var polyIds = new List <ObjectId>();
if (plineId.IsNull && lineId.IsNull)
{
return(polyIds);
}
var database = plineId.Database;
using (var tr = database.TransactionManager.StartTransaction())
{
var reader = new DwgReader()
{
PrecisionScale = 100000
};
var pline = tr.GetObject(plineId, OpenMode.ForRead) as Curve;
if (pline == null || !pline.Closed)
{
return(polyIds);
}
var lineObj = tr.GetObject(lineId, OpenMode.ForRead) as Curve;
if (lineObj == null)
{
return(polyIds);
}
var splitGeometry = reader.ReadCurveAsPolygon(tr, pline);
splitGeometry.Buffer(0);
var lineGeometry = reader.ReadGeometry(lineObj, tr);
lineGeometry.Buffer(0);
// 合并
var resultPolygons = SplitPolygon(splitGeometry, lineGeometry);
var writer = new DwgWriter()
{
PrecisionScale = 100000
};
var multiPolygon = resultPolygons as MultiPolygon;
if (multiPolygon != null)
{
var polylines = writer.WritePolyline(multiPolygon);
// 加入数据库
foreach (var polyline in polylines)
{
var modelspaceId = SymbolUtilityServices.GetBlockModelSpaceId(database);
var modelspace = (BlockTableRecord)tr.GetObject(modelspaceId, OpenMode.ForWrite);
var polyId = modelspace.AppendEntity(polyline);
tr.AddNewlyCreatedDBObject(polyline, true);
polyIds.Add(polyId);
}
}
tr.Commit();
}
return(polyIds);
}
public static List <ObjectId> PolygonizeLineStrings(Database database, IEnumerable <ObjectId> polylineIdCollection,
String outLayerName = "0",
AcadColor color = null, double precision = 0.00001)
{
var result = new List <ObjectId>();
using (var tr = database.TransactionManager.StartTransaction())
{
// 读入多边形数据
var lineStringList = new List <IGeometry>();
foreach (ObjectId polylineId in polylineIdCollection)
{
var curve = tr.GetObject(polylineId, OpenMode.ForRead) as Curve;
var reader = new DwgReader();
var lineString = reader.ReadGeometry(curve, tr) as LineString;
if (lineString != null && lineString.IsEmpty == false)
{
lineStringList.Add(lineString);
}
}
#if TryManualUnion
// 创建节点
var nodedContours = new List <List <IGeometry> >();
var scale = 1.0 / precision;
var geomNoder = new NetTopologySuite.Noding.Snapround.GeometryNoder(new PrecisionModel(scale));
var nodedList = geomNoder.Node(lineStringList);
// 这里可能可以用nodedList.Count来计算一个gourp的size来限定线程数量
var maxCountInGroup = 200;
foreach (var c in nodedList)
{
//Coordinate[] linePts = CoordinateArrays.RemoveRepeatedPoints(c.Coordinates);
//if (linePts.Count() > 1)
// nodedContours.Add(c.Factory.CreateLineString(linePts));
//c.Buffer(0.001);
// 将所有的线段每maxCountInGroup个分成一组.
var groupCount = nodedContours.Count;
if (groupCount == 0)
{
nodedContours.Add(new List <IGeometry>());
}
var itemCount = nodedContours[nodedContours.Count - 1].Count;
if (itemCount < maxCountInGroup)
{
nodedContours[nodedContours.Count - 1].Add(c);
}
else
{
nodedContours.Add(new List <IGeometry>());
nodedContours[nodedContours.Count - 1].Add(c);
}
}
var workers = new List <Worker>();
var threadList = new List <Thread>();
// 为每组geometry开一个线程做union.
foreach (List <IGeometry> nodedContour in nodedContours)
{
// Start a thread.
var worker = new Worker(nodedContour);
workers.Add(worker);
var thread = new Thread(worker.Execute);
threadList.Add(thread);
thread.Start();
}
// 等待所有线程运行结束
foreach (Thread thread in threadList)
{
thread.Join();
}
// 最后将每组union得到的IGeometry再做一次union
var nodedLineString = workers[0].Geometry;
for (int i = 1; i < workers.Count; i++)
{
nodedLineString = nodedLineString.Union(workers[i].Geometry);
}
#else
// 开始做Union
var nodedLineString = UnaryUnionOp.Union(lineStringList, new GeometryFactory(new PrecisionModel(0.9d)));
//var nodedLineString = lineStringList[0];
//for (int i = 1; i < lineStringList.Count; i++)
//{
// nodedLineString = nodedLineString.Union(lineStringList[i]);
//}
#endif
//造区
Polygonizer 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);
// 多边形
foreach (IGeometry geometry in polys)
{
var polygon = geometry as Polygon;
if (polygon != null)
{
var polylines = writer.WritePolyline(polygon);
foreach (Polyline polyline in polylines)
{
if (color != null)
{
polyline.Color = color;
}
polyline.Layer = outLayerName;
// 输出到CAD
var polylineId = blockTableRecord.AppendEntity(polyline);
result.Add(polylineId);
tr.AddNewlyCreatedDBObject(polyline, true);
}
}
}
//// 悬挂线
//foreach (ILineString lineString in dangles)
//{
// if (lineString != null)
// {
// var polyline = writer.WritePolyline(lineString);
// if (color != null)
// polyline.Color = color;
// polyline.Layer = outLayerName;
// // 输出到CAD
// blockTableRecord.AppendEntity(polyline);
// tr.AddNewlyCreatedDBObject(polyline, true);
// }
//}
//// 裁剪线
//foreach (ILineString lineString in cuts)
//{
// if (lineString != null)
// {
// var polyline = writer.WritePolyline(lineString);
// if (color != null)
// polyline.Color = color;
// polyline.Layer = outLayerName;
// // 输出到CAD
// blockTableRecord.AppendEntity(polyline);
// tr.AddNewlyCreatedDBObject(polyline, true);
// }
//}
tr.Commit();
}
return(result);
}
