/// <summary>
/// Calculates the DifferenceLines and adds the subcurves to the provided result list.
/// </summary>
/// <param name="sourceGeometry"></param>
/// <param name="targetPolyline"></param>
/// <param name="resultList">All resulting subcurves including the ones that cannot be used to reshape</param>
/// <param name="trackCancel"></param>
/// <returns></returns>
public ReshapeAlongCurveUsability CalculateSubcurves(
IGeometry sourceGeometry,
IPolyline targetPolyline,
IList <CutSubcurve> resultList,
ITrackCancel trackCancel)
{
Assert.ArgumentNotNull(sourceGeometry);
Assert.ArgumentNotNull(targetPolyline);
Assert.ArgumentNotNull(resultList);
Stopwatch watch = _msg.DebugStartTiming();
IPolyline preprocessedSourcePolyline =
ChangeGeometryAlongUtils.GetPreprocessedGeometryForExtent(
sourceGeometry, ClipExtent);
if (preprocessedSourcePolyline.IsEmpty)
{
_msg.WarnFormat("Source feature is outside the processing extent.");
return(ReshapeAlongCurveUsability.NoSource);
}
IPointCollection intersectionPoints;
IGeometryCollection differences = CalculateDifferences(
preprocessedSourcePolyline,
targetPolyline,
trackCancel,
out intersectionPoints);
if (trackCancel != null && !trackCancel.Continue())
{
return(ReshapeAlongCurveUsability.Undefined);
}
if (differences == null)
{
return(ReshapeAlongCurveUsability.AlreadyCongruent);
}
SubcurveFilter?.PrepareForSource(sourceGeometry);
bool canReshape = CalculateReshapeSubcurves(
preprocessedSourcePolyline, targetPolyline, differences,
intersectionPoints, resultList, trackCancel);
JoinNonForkingSubcurves(resultList);
Marshal.ReleaseComObject(preprocessedSourcePolyline);
Marshal.ReleaseComObject(differences);
_msg.DebugStopTiming(
watch, "RecalculateReshapableSubcurves: Total number of curves: {0}.",
resultList.Count);
if (canReshape)
{
return(ReshapeAlongCurveUsability.CanReshape);
}
return(resultList.Count == 0
? ReshapeAlongCurveUsability.NoReshapeCurves
: ReshapeAlongCurveUsability.InsufficientOrAmbiguousReshapeCurves);
}