public static void UnionPolygons()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
var currentDoc = Application.DocumentManager.MdiActiveDocument;
var polylineIds = MapCleanService.GetAllVisiblePolylineObjectIds(currentDoc);
var database = currentDoc.Database;
var partitioner = new DrawingPartitioner(database);
partitioner.Check(polylineIds);
using (var transaction = database.TransactionManager.StartTransaction())
{
var modelspaceId = SymbolUtilityServices.GetBlockModelSpaceId(database);
var modelspace = (BlockTableRecord)transaction.GetObject(modelspaceId, OpenMode.ForWrite);
foreach (var region in partitioner.IsolatedRegions)
{
var polyline = new Polyline(region.Contour.Count);
int i = 0;
foreach (var point in region.Contour)
{
polyline.AddVertexAt(i++, new Point2d(point.X, point.Y), 0, 0, 0);
}
polyline.Closed = true;
polyline.ColorIndex = 3;
modelspace.AppendEntity(polyline);
transaction.AddNewlyCreatedDBObject(polyline, add: true);
}
transaction.Commit();
}
stopWatch.Stop();
currentDoc.Editor.WriteMessage("\n图形分区花费{0}毫秒\n", stopWatch.ElapsedMilliseconds);
}
public static ApartmentContourInfo CalcContour(Document doc, IEnumerable <ObjectId> objectIdsList)
{
var newCreatedIds = new List <ObjectId>();
IEnumerable <ObjectId> curveIds = new List <ObjectId>();
IEnumerable <ObjectId> splitSourceIds = new List <ObjectId>();
List <ObjectId> duplicateIds = new List <ObjectId>();
using (var waitCursor = new WaitCursorSwitcher())
using (var tolerance = new SafeToleranceOverride())
{
// 1. Break down all lines
doc.Editor.WriteMessage("\n打断所有交叉线...\n");
var breakCrossingAlgorithm = new BreakCrossingObjectsQuadTree(doc.Editor);
breakCrossingAlgorithm.Check(objectIdsList);
var breakIdPairs = breakCrossingAlgorithm.Fix(eraseOld: false).ToList();
splitSourceIds = breakIdPairs.Select(it => it.Key);
var checkIds = objectIdsList.Except(splitSourceIds).ToList();
foreach (var idPair in breakIdPairs)
{
newCreatedIds.AddRange(idPair.Value);
checkIds.AddRange(idPair.Value);
}
// 2. Erase the duplcate curves
doc.Editor.WriteMessage("\n排除重复线...\n");
var duplicateEraserAlgorithm = new DuplicateEntityEraserKdTree(doc.Editor, 0.0005);
duplicateEraserAlgorithm.Check(checkIds);
var crossingInfos = duplicateEraserAlgorithm.CrossingInfos;
if (crossingInfos != null)
{
foreach (var curveCrossingInfo in crossingInfos)
{
checkIds.Remove(curveCrossingInfo.TargetId);
duplicateIds.Add(curveCrossingInfo.TargetId);
}
// Deal with the source duplicate
var groups = crossingInfos.GroupBy(it => it.TargetId);
foreach (var g in groups)
{
if (g.Count() <= 1)
{
continue;
}
bool first = true;
foreach (var curveCrossingInfo in g)
{
if (first)
{
first = false;
continue;
}
checkIds.Remove(curveCrossingInfo.SourceId);
duplicateIds.Add(curveCrossingInfo.SourceId);
}
}
}
// 3. Extend undershoot
doc.Editor.WriteMessage("\n调整未及点...\n");
var extendUndershoots = new ExtendUnderShoots(doc.Editor, 0.001);
extendUndershoots.Check(checkIds);
var splittedIds = extendUndershoots.Fix(breakTarget: true);
foreach (var pair in splittedIds)
{
checkIds.Remove(pair.Key);
checkIds.AddRange(pair.Value);
// Also recorded in newCreatedIds which will be removed at the end.
if (newCreatedIds.Contains(pair.Key))
{
newCreatedIds.Remove(pair.Key);
newCreatedIds.AddRange(pair.Value);
}
}
// 4. 排除0面积闭合线
doc.Editor.WriteMessage("\n排除零面积闭合线...\n");
var zeroAreaLoopIds = CurveUtils.GetZeroAreaLoop(checkIds, doc.Database);
foreach (var zeroAreaLoopId in zeroAreaLoopIds)
{
checkIds.Remove(zeroAreaLoopId);
duplicateIds.Add(zeroAreaLoopId);
}
// 5. 删除0长度对象
doc.Editor.WriteMessage("\n排除零长度对象...\n");
var zeroLengthEraser = new ZeroLengthEraser(doc.Editor);
zeroLengthEraser.Check(checkIds);
foreach (ObjectId zeroLengthId in zeroLengthEraser.ZerolengthObjectIdCollection)
{
checkIds.Remove(zeroLengthId);
duplicateIds.Add(zeroLengthId);
}
curveIds = checkIds;
//// Test code
//using (var transaction = doc.Database.TransactionManager.StartTransaction())
//{
// var color = Color.FromColorIndex(ColorMethod.ByAci, 3); // Green
// ObjectId layerId = LayerUtils.AddNewLayer(doc.Database, "temp-poly", "Continuous", color);
// foreach (var polygonId in polygonIds)
// {
// var entity = (Entity)transaction.GetObject(polygonId, OpenMode.ForWrite);
// entity.Color = color;
// entity.LayerId = layerId;
// }
// transaction.Commit();
//}
//return new List<Point2d>();
}
// 2. Make polygons.
doc.Editor.WriteMessage("开始分析外墙轮廓...");
var resultIds = new List <ObjectId>();
if (curveIds.Any())
{
var color = Color.FromColorIndex(ColorMethod.ByAci, 3); // Green
ObjectId layerId = LayerUtils.AddNewLayer(doc.Database, "temp-poly", "Continuous", color);
using (var tolerance = new SafeToleranceOverride())
using (var waitCursor = new WaitCursorSwitcher())
{
//var polygons = MinimalLoopSearcher2.Search(curveIds, doc);
//using (var transaction = doc.Database.TransactionManager.StartTransaction())
//{
// var modelspaceId = SymbolUtilityServices.GetBlockModelSpaceId(doc.Database);
// var modelspace = (BlockTableRecord)transaction.GetObject(modelspaceId, OpenMode.ForWrite);
// foreach (var polyline in polygons)
// {
// polyline.Color = color;
// polyline.LayerId = layerId;
// var id = modelspace.AppendEntity(polyline);
// resultIds.Add(id);
// transaction.AddNewlyCreatedDBObject(polyline, true);
// }
// transaction.Commit();
//}
resultIds = NtsUtils.PolygonizeLineStrings(doc.Database, curveIds, "temp-poly", color, 0.0001);
}
}
// 3. Union all polygons
var database = doc.Database;
var partitioner = new DrawingPartitioner(database);
partitioner.Check(resultIds);
// 4. Get largest are polygon which is the apartment's contour
var polylines = new List <Polyline>();
foreach (var region in partitioner.IsolatedRegions)
{
var polyline = new Polyline(region.Contour.Count);
int i = 0;
foreach (var point in region.Contour)
{
polyline.AddVertexAt(i++, new Point2d(point.X, point.Y), 0, 0, 0);
}
polyline.Closed = true;
polylines.Add(polyline);
}
polylines.Sort((poly1, poly2) =>
{
if (poly1.Area > poly2.Area)
{
return(-1);
}
return(1);
});
if (polylines.Count >= 2)
{
var first = polylines[0];
var second = polylines[1];
// Exclude the situation if the largest polyline is a drawing frame.
if (IsRectangle(first) && HaveSomeTextsOnBottom(first, database) &&
PolygonIncludeSearcher.IsInclude(first, second, null))
{
polylines.RemoveAt(0);
}
}
Polyline largestPolyline = polylines.FirstOrDefault();
var resultPoints = new List <Point2d>();
if (largestPolyline != null)
{
resultPoints = CurveUtils.GetDistinctVertices2D(largestPolyline, null);
if (resultPoints[0] != resultPoints[resultPoints.Count - 1])
{
resultPoints.Add(resultPoints[0]);
}
var clockwise = ComputerGraphics.ClockWise2(resultPoints.ToArray());
if (clockwise)
{
resultPoints.Reverse();
}
//// Test code !
//using (var transaction = database.TransactionManager.StartTransaction())
//{
// var modelspaceId = SymbolUtilityServices.GetBlockModelSpaceId(database);
// var modelspace = (BlockTableRecord)transaction.GetObject(modelspaceId, OpenMode.ForWrite);
// var color = Color.FromColorIndex(ColorMethod.ByAci, 3); // Green
// ObjectId layerId = LayerUtils.AddNewLayer(doc.Database, "temp-poly", "Continuous", color);
// largestPolyline.Color = color;
// largestPolyline.LayerId = layerId;
// modelspace.AppendEntity(largestPolyline);
// transaction.AddNewlyCreatedDBObject(largestPolyline, add: true);
// foreach (var polyline in polylines)
// {
// if (polyline == largestPolyline)
// continue;
// polyline.Color = color;
// polyline.LayerId = layerId;
// modelspace.AppendEntity(polyline);
// transaction.AddNewlyCreatedDBObject(polyline, add: true);
// }
// transaction.Commit();
//}
}
// Get contour linesegments from resultPoints
var contourSegments = new List <LineSegment3d>();
var innerSegments = new List <LineSegment3d>();
if (resultPoints.Count > 0)
{
for (var i = 0; i < resultPoints.Count - 1; i++)
{
var start = new Point3d(resultPoints[i].X, resultPoints[i].Y, 0);
var end = new Point3d(resultPoints[i + 1].X, resultPoints[i + 1].Y, 0);
var segment = new LineSegment3d(start, end);
contourSegments.Add(segment);
}
// Get inner linesegments
using (var tr = doc.Database.TransactionManager.StartTransaction())
{
var contourArray = resultPoints.ToArray();
foreach (var objId in curveIds)
{
var point2ds = CurveUtils.GetDistinctVertices2D(objId, tr);
for (var i = 0; i < point2ds.Count - 1; i++)
{
var start = point2ds[i];
var end = point2ds[i + 1];
if (start.IsEqualTo(end))
{
continue;
}
// TODO: no need to calculate again for startInPoly.
var startInPoly = ComputerGraphics.IsInPolygon2(start, contourArray);
var endInPoly = ComputerGraphics.IsInPolygon2(end, contourArray);
if ((startInPoly == 0 && endInPoly == 0) ||
(startInPoly == -1 && endInPoly == -1))
{
continue;
}
var segment = new LineSegment3d(new Point3d(start.X, start.Y, 0),
new Point3d(end.X, end.Y, 0));
innerSegments.Add(segment);
}
}
tr.Commit();
}
}
// 5. Delete the polygons of resultIds
using (var tr = doc.Database.TransactionManager.StartTransaction())
{
foreach (var objId in resultIds)
{
if (objId.IsErased)
{
continue;
}
var dbObj = tr.GetObject(objId, OpenMode.ForWrite);
dbObj.Erase();
}
////////////////////////////////////////////////////////////////////////////////////////
tr.Commit();
}
// Delete the splited curves
using (var tr = doc.Database.TransactionManager.StartTransaction())
{
foreach (var newCreatedId in newCreatedIds)
{
if (newCreatedId.IsErased)
{
continue;
}
var dbObj = tr.GetObject(newCreatedId, OpenMode.ForWrite);
dbObj.Erase();
}
////////////////////////////////////////////////////////////////////////////////////////
tr.Commit();
}
var result = new ApartmentContourInfo()
{
Contour = contourSegments,
InternalSegments = innerSegments
};
return(result);
}