private IEnumerable <IntersectionInfo> GetApparentIntersections(CurveVertex current, IEnumerable <CurveVertex> danglingVertices,
HashSet <CurveVertex> visitedVertices, Transaction transaction)
{
visitedVertices.Add(current);
var result = new List <IntersectionInfo>();
var ids = Editor.SelectEntitiesAtPoint(SelectionFilterUtils.OnlySelectCurve(), current.Point, _tolerance);
foreach (var id in ids)
{
// Check whether danglingVertices contains this id.
var vertices = danglingVertices.Where(it => it.Id == id);
if (!vertices.Any())
{
continue;
}
// Check each vertex of this id.
foreach (var vertex in vertices)
{
if (vertex == current)
{
continue;
}
if (visitedVertices.Contains(vertex))
{
continue;
}
var distance = (vertex.Point - current.Point).Length;
if (distance.Larger(_tolerance * 2))
{
continue;
}
// Calcuate the intersection info of these two vertices.
var info = CalcApparentIntersection(current, vertex, transaction);
if (info != null)
{
result.Add(info);
}
}
}
return(result);
}
/// <summary>
/// Select entities at point by editor.
/// </summary>
/// <param name="point"></param>
/// <param name="editor"></param>
/// <returns></returns>
protected ObjectId[] SelectCurvesAtPoint(Point3d point)
{
var selectionFilter = SelectionFilterUtils.OnlySelectCurve();
return(Editor.SelectEntitiesAtPoint(selectionFilter, point));
}
private IntersectionInfo GetUnderShootIntersection(CurveVertex vertex, Transaction transaction, double tolerance)
{
var curve = transaction.GetObject(vertex.Id, OpenMode.ForRead);
var desiredExtend = CurveUtils.GetExtendType((Curve)curve, vertex.Point);
var line = curve as Line;
var arc = curve as Arc;
var polyline = curve as Polyline;
var polyline2d = curve as Polyline2d;
if (polyline != null)
{
line = CurveUtils.CutOutLineFromPolyLine(polyline, vertex.Point);
}
else if (polyline2d != null)
{
line = CurveUtils.CutOutLineFromPolyline2d(polyline2d, vertex.Point, transaction);
}
// Construct a polygon to get adjacent entities.
Point3dCollection polygon = null;
if (line != null)
{
var direction = line.EndPoint - line.StartPoint;
if (desiredExtend == ExtendType.ExtendStart)
{
direction = -1.0 * direction;
}
polygon = BuildSelectionPolygonForLine(vertex.Point, direction, tolerance);
}
else if (arc != null)
{
polygon = BuildSelectionPolygonForArc(vertex.Point, tolerance);
}
// Zoom window
var minPt = new Point3d(vertex.Point.X - tolerance, vertex.Point.Y - tolerance, 0.0);
var maxPt = new Point3d(vertex.Point.X + tolerance, vertex.Point.Y + tolerance, 0.0);
var extents = new Extents3d(minPt, maxPt);
Editor.ZoomToWin(extents, factor: 2.0);
var selectionResult = Editor.SelectCrossingPolygon(polygon, SelectionFilterUtils.OnlySelectCurve());
if (selectionResult.Status != PromptStatus.OK || selectionResult.Value == null)
{
return(null);
}
// Check each adjacent entity whether they are intersected.
var intersectionInfos = new List <IntersectionInfo>();
var adjacentIds = selectionResult.Value.GetObjectIds();
foreach (ObjectId objId in adjacentIds)
{
var targetCurve = transaction.GetObject(objId, OpenMode.ForRead) as Curve;
if (targetCurve == null)
{
continue;
}
// Calculate the intersection
IntersectionInfo info = null;
if (line != null)
{
info = IntersectLineAndCurve(line, targetCurve, vertex.Point, desiredExtend);
}
else if (arc != null)
{
info = IntersectArcAndCurve(arc, targetCurve, vertex.Point, desiredExtend);
}
if (info != null && info.SourceExtendType == desiredExtend)
{
info.SourceId = vertex.Id;
info.TargetId = objId;
intersectionInfos.Add(info);
}
}
// Get nearest point.
if (intersectionInfos.Count <= 0)
{
return(null);
}
var nearest = intersectionInfos[0];
var nearsetDist = (intersectionInfos[0].IntersectPoint - vertex.Point).Length;
for (int i = 1; i < intersectionInfos.Count; i++)
{
var dist = (intersectionInfos[i].IntersectPoint - vertex.Point).Length;
if (dist < nearsetDist)
{
nearsetDist = dist;
nearest = intersectionInfos[i];
}
}
if (nearsetDist.Larger(tolerance))
{
return(null);
}
return(nearest);
}
public ObjectIdCollection GetDuplicateCurveIdsByCurve(Transaction trans, Curve curve)
{
var duplicateCurveIds = new ObjectIdCollection();
var entityIds = EditorUtils.SelectObjectsByEntityBoundingBox(base.Editor, SelectionFilterUtils.OnlySelectCurve(), curve, _tolerance * 2);
var currentLine = curve as Line;
var currentArc = curve as Arc;
var currentPline = curve as Polyline;
var currentPline2d = curve as Polyline2d;
foreach (ObjectId entityId in entityIds)
{
// Filter out itself.
if (entityId == curve.ObjectId)
{
continue;
}
var entity = trans.GetObject(entityId, OpenMode.ForRead) as Curve;
if (entity == null)
{
continue;
}
// 所有的比较，都需要比较起始点和终点是否重合，如果不重合，则认为不是duplicate curves.
if (IsStartAndEndPointsEquals(curve, entity) == false)
{
continue;
}
var line = entity as Line;
var arc = entity as Arc;
var pline = entity as Polyline;
var pline2d = entity as Polyline2d;
bool isDuplicate = false;
if (currentLine != null)
{
// 找Line的重复直线或多段线
// 如果是Line->Line,则为重合
// 如果是Line->Polyline,则比较长度
// 如果是Line->Polyline2d,则比较长度
if (line != null)
{
isDuplicate = true;
}
else if (pline != null && IsLengthEquals(currentLine, pline, _tolerance))
{
isDuplicate = true;
}
else if (pline2d != null && IsLengthEquals(currentLine, pline2d, _tolerance))
{
isDuplicate = true;
}
}
else if (currentArc != null)
{
// 找Arc的重复Arc,比较Arc的StartAngle和EndAngle
if (arc != null)
{
if ((((currentArc.StartPoint - arc.StartPoint).Length < _tolerance) &&
Math.Abs(currentArc.StartAngle - arc.StartAngle) < _tolerance &&
Math.Abs(currentArc.EndAngle - arc.EndAngle) < _tolerance) ||
(((currentArc.StartPoint - arc.EndPoint).Length < _tolerance) &&
Math.Abs(currentArc.StartAngle - arc.EndAngle) < _tolerance &&
Math.Abs(currentArc.EndAngle - arc.StartAngle) < _tolerance))
{
isDuplicate = true;
}
}
}
else if (currentPline != null)
{
// 找Polyline的重复直线或多段线
// 如果是Polyline->Line,则比较及长度
// 如果是Polyline->Polyline 则比较所有节点位置
// 如果是Polyline->Polyline2d 则比较所有节点位置
if (line != null && IsLengthEquals(line, currentPline, _tolerance))
{
isDuplicate = true;
}
else if (pline != null && IsVertexesEquals(currentPline, pline, _tolerance, trans))
{
isDuplicate = true;
}
else if (pline2d != null && IsVertexesEquals(currentPline, pline2d, _tolerance, trans))
{
isDuplicate = true;
}
}
else if (currentPline2d != null)
{
// 找Polyline的重复直线或多段线
// 如果是Polyline2d->Line,则比较长度
// 如果是Polyline->Polyline 则比较所有节点位置
// 如果是Polyline->Polyline2d 则比较所有节点位置
if (line != null && IsLengthEquals(line, currentPline2d, _tolerance))
{
isDuplicate = true;
}
else if (pline != null && IsVertexesEquals(pline, currentPline2d, _tolerance, trans))
{
isDuplicate = true;
}
else if (pline2d != null && IsVertexesEquals(currentPline2d, pline2d, _tolerance, trans))
{
isDuplicate = true;
}
}
if (isDuplicate)
{
duplicateCurveIds.Add(entityId);
}
}
// 如果找到重复线，则将其自己也加入到duplicateCurveIds
if (duplicateCurveIds.Count > 0)
{
duplicateCurveIds.Add(curve.ObjectId);
}
return(duplicateCurveIds);
}