private IEnumerable <CurveCrossingInfo> FilterCrossInfos(IEnumerable <CurveCrossingInfo> crossInfos, out IEnumerable <CurveCrossingInfo> duplicateEntities)
{
duplicateEntities = new List <CurveCrossingInfo>();
var result = new List <CurveCrossingInfo>();
foreach (var curveCrossingInfo in crossInfos)
{
// Filter out duplicate entities
if (AreDuplicateEntities(curveCrossingInfo))
{
((List <CurveCrossingInfo>)duplicateEntities).Add(curveCrossingInfo);
continue;
}
var sourcePoints = CurveUtils.GetCurveEndPoints(curveCrossingInfo.SourceId, _transaction);
var targetPoints = new Point3d[0];
if (curveCrossingInfo.TargetId != curveCrossingInfo.SourceId)
{
targetPoints = CurveUtils.GetCurveEndPoints(curveCrossingInfo.TargetId, _transaction);
}
sourcePoints = DistinctEndPoints(sourcePoints);
targetPoints = DistinctEndPoints(targetPoints);
var points = new List <Point3d>();
foreach (var point3D in curveCrossingInfo.IntersectPoints)
{
// Whether point3D is end point of each cuve
//// If sourcePoints.Length is 1 or 0, means it's a loop, loop need to be splitted.
//if (sourcePoints.Length >= 2 && sourcePoints.Contains(point3D) &&
// targetPoints.Length >= 2 && targetPoints.Contains(point3D))
// continue;
// If curveCrossingInfo.SourceId == curveCrossingInfo.TargetId, it's a self intersection.
if (sourcePoints.Contains(point3D) && targetPoints.Contains(point3D) &&
curveCrossingInfo.SourceId != curveCrossingInfo.TargetId)
{
continue;
}
points.Add(point3D);
}
if (points.Count > 0)
{
var newCrossingInfo = new CurveCrossingInfo(curveCrossingInfo.SourceId, curveCrossingInfo.TargetId,
points.ToArray());
result.Add(newCrossingInfo);
}
}
return(result);
}