private static IPolyline TryGetAdjacentSegmentsAsPolyline(
[NotNull] IPolygon polygon,
[NotNull] IPoint startingAt)
{
double xyTolerance = GeometryUtils.GetXyTolerance(startingAt);
int partIdx;
const bool allowNoMatch = true;
IList <int> adjacentSegments = SegmentReplacementUtils.GetAdjacentSegmentIndexes(
polygon, startingAt, xyTolerance, out partIdx, allowNoMatch);
if (adjacentSegments.Count == 0)
{
return(null);
}
var segmentList = new List <ISegment>();
foreach (int segmentIdx in adjacentSegments)
{
ISegment segment = GeometryUtils.GetSegment((ISegmentCollection)polygon, partIdx,
segmentIdx);
segmentList.Add(GeometryFactory.Clone(segment));
}
if (segmentList.Count == 0)
{
return(null);
}
ISegment[] segments = segmentList.ToArray();
// create a polyline
IPolyline result = GeometryFactory.CreateEmptyPolyline(polygon);
GeometryUtils.GeometryBridge.AddSegments((ISegmentCollection)result,
ref segments);
GeometryUtils.Simplify(result);
return(result);
}
