private static TopologyData BuildTopology(ObjectId[] objectIds)
{
var topoData = new TopologyData();
var database = objectIds[0].Database;
using (var tr = database.TransactionManager.StartTransaction())
{
var reader = new DwgReader();
foreach (ObjectId objectId in objectIds)
{
// 如果没有
var curve = tr.GetObject(objectId, OpenMode.ForRead) as Curve;
if (curve == null || !curve.Visible)
{
continue;
}
// 图层关闭，继续，因为有可能是图幅层
var layer = (LayerTableRecord)tr.GetObject(curve.LayerId, OpenMode.ForRead);
if (layer.IsOff)
{
continue;
}
// 目前只处理封闭的和大于3的多边形
// http://192.168.0.6:8080/browse/LCLIBCAD-903
// 否则会弹出points must form a closed linestring异常
if (curve.Closed &&
reader.NumberOfVerticesMoreThan3(curve))
{
var geom = reader.ReadCurveAsPolygon(tr, curve) as IGeometry;
geom = geom.Buffer(0);
if (!geom.IsValid)
{
topoData.InvalidObjects.Add(objectId);
System.Diagnostics.Trace.WriteLine(geom.ToString());
}
// 没有包围盒，无法进入空间索引
else if (geom.EnvelopeInternal.IsNull)
{
topoData.WrongEnvelopeObjects.Add(objectId);
}
else
{
//geom = SimpleGeometryPrecisionReducer.Reduce(geom, pmFixed3);
geom.UserData = objectId;
topoData.Quadtree.Insert(geom.EnvelopeInternal, geom);
topoData.Geometries.Add(geom);
topoData.GeometryDictionary[objectId] = geom;
}
}
}
tr.Commit();
}
return(topoData);
}
public static Dictionary <Curve, IList <Curve> > GetNearGeometries(IEnumerable <Curve> curves, double buffer, bool forceClosed = true)
{
var dictionary = new Dictionary <Curve, IList <Curve> >();
var quadtree = new Quadtree <IGeometry>();
var reader = new DwgReader();
var geometries = new List <IGeometry>();
foreach (var curve in curves)
{
// 目前只处理封闭的和大于3的多边形
// http://192.168.0.6:8080/browse/LCLIBCAD-903
// 否则会弹出“points must form a closed linestring”异常
if (forceClosed && !curve.Closed || !reader.NumberOfVerticesMoreThan3(curve))
{
continue;
}
var geom = reader.ReadCurveAsPolygon(null, curve) as Polygon;
if (geom == null)
{
continue;
}
geom.UserData = curve;
quadtree.Insert(geom.EnvelopeInternal, geom);
geometries.Add(geom);
}
foreach (var geom in geometries)
{
var nearGeoms = GetNearGeometries(geom, quadtree, buffer);
var curve = (Curve)geom.UserData;
var nearCurves = new List <Curve>();
foreach (var geometry in nearGeoms)
{
var nearCurve = (Curve)geometry.UserData;
if (nearCurve != curve)
{
nearCurves.Add(nearCurve);
}
}
dictionary[curve] = nearCurves;
}
return(dictionary);
}
public static Dictionary <ObjectId, IList <ObjectId> > GetNearGeometries(IList <ObjectId> objectIds, double buffer, bool forceClosed = true)
{
var dictionary = new Dictionary <ObjectId, IList <ObjectId> >();
var database = objectIds[0].Database;
var quadtree = new Quadtree <IGeometry>();
var geometries = new List <IGeometry>();
using (var tr = database.TransactionManager.StartTransaction())
{
var reader = new DwgReader();
foreach (ObjectId objectId in objectIds)
{
if (!objectId.IsValid)
{
continue;
}
Debug.WriteLine("{0}", objectId.Handle);
var curve = tr.GetObject(objectId, OpenMode.ForRead) as Curve;
if (curve == null)
{
continue;
}
// 目前只处理封闭的和大于3的多边形
// http://192.168.0.6:8080/browse/LCLIBCAD-903
// 否则会弹出“points must form a closed linestring”异常
if (forceClosed && !curve.Closed || !reader.NumberOfVerticesMoreThan3(curve))
{
continue;
}
var geom = reader.ReadCurveAsPolygon(tr, curve) as Polygon;
if (geom == null)
{
continue;
}
geom.UserData = objectId;
quadtree.Insert(geom.EnvelopeInternal, geom);
geometries.Add(geom);
}
foreach (var geom in geometries)
{
var nearGeoms = GetNearGeometries(geom, quadtree, buffer);
var objectId = (ObjectId)geom.UserData;
var ids = new List <ObjectId>();
foreach (var geometry in nearGeoms)
{
var nearId = (ObjectId)geometry.UserData;
if (nearId != objectId)
{
ids.Add(nearId);
}
}
dictionary[objectId] = ids;
}
tr.Commit();
}
return(dictionary);
}
