private bool CutFeature([NotNull] IFeature feature,
[NotNull] IPolyline cutPolyline,
ChangeAlongZSource?zSource = null)
{
IGeometry selectedGeometry = feature.Shape;
if (GeometryUtils.Disjoint(cutPolyline, selectedGeometry))
{
return(false);
}
if (FeatureToCutPredicate != null &&
!FeatureToCutPredicate(selectedGeometry, cutPolyline))
{
return(false);
}
_msg.DebugFormat("Cutting feature {0}", GdbObjectUtils.ToString(feature));
IGeometry geometryToCut = GeometryFactory.Clone(selectedGeometry);
CutPolyline usedCutLine = null;
if (ProcessedCutLines != null)
{
usedCutLine = new CutPolyline(feature.OID);
ProcessedCutLines.Add(usedCutLine);
}
IList <IGeometry> resultGeometries;
switch (geometryToCut.GeometryType)
{
case esriGeometryType.esriGeometryPolygon:
resultGeometries = CutGeometryUtils.TryCut(
(IPolygon)geometryToCut, cutPolyline,
zSource ?? DetermineZSource(feature));
break;
case esriGeometryType.esriGeometryPolyline:
resultGeometries =
_networkFeatureCutter?.IsNetworkEdge(feature) == true
? GetNetworkSplitPoints(cutPolyline, geometryToCut)
: CutGeometryUtils.TryCut((IPolyline)geometryToCut, cutPolyline);
break;
case esriGeometryType.esriGeometryMultiPatch:
resultGeometries =
CutGeometryUtils.TryCut((IMultiPatch)geometryToCut, cutPolyline,
zSource ?? DetermineZSource(feature),
usedCutLine, DegenerateMultipatchFootprintAction)
.Values.Cast <IGeometry>()
.ToList();
break;
default:
throw new InvalidOperationException(
$"Unsupported geometry type: {geometryToCut.GeometryType}");
}
if (resultGeometries != null && resultGeometries.Count > 0)
{
IList <IGeometry> previousResults;
if (ResultGeometriesByFeature.TryGetValue(feature, out previousResults))
{
foreach (IGeometry resultGeometry in resultGeometries)
{
previousResults.Add(resultGeometry);
}
}
else
{
ResultGeometriesByFeature.Add(feature, resultGeometries);
}
}
return(resultGeometries != null && resultGeometries.Count > 0);
}
private void CutFeature3D(IFeature feature, IMultiPatch cutSurfaces)
{
IGeometry selectedGeometry = feature.Shape;
if (GeometryUtils.Disjoint(cutSurfaces, selectedGeometry))
{
return;
}
if (GeometryUtils.AreEqual(cutSurfaces, selectedGeometry))
{
return;
}
if (FeatureToCutPredicate != null &&
!FeatureToCutPredicate(selectedGeometry, cutSurfaces))
{
return;
}
// TODO: Multipatches should be cut if its footprint can be cut. However, if multiple ring groups exist,
// that are not connected (touch along a line) in 3D, the rings should be grouped into connected parts.
List <CutPolyline> cutPolylines =
IntersectionUtils.GetIntersectionLines3D((IMultiPatch)selectedGeometry,
cutSurfaces).ToList();
foreach (CutPolyline cutPoline in cutPolylines)
{
cutPoline.ObjectId = feature.OID;
// Add the calculated lines for reference and traceability, filtering and subsequent cutting
// with Success field equals null
ProcessedCutLines?.Add(cutPoline);
}
if (cutPolylines.Count > 0)
{
var success = false;
// TODO: Consider filter option for cut lines or even a clever path selection logic to avoid junctions:
// Only use cut lines that are in the plane to connect disjoint cut line paths that are positive or negative
// Consider adding an option to delete the negative or the positive side of the rings.
var cutLineToUse =
(IPolyline)GeometryUtils.Union(
cutPolylines.Select(c => c.Polyline).ToList());
GeometryUtils.Simplify(cutLineToUse, true, false);
if (!cutLineToUse.IsEmpty)
{
try
{
success = CutFeature(feature, cutLineToUse,
ChangeAlongZSource.SourcePlane);
}
catch (Exception e)
{
_msg.WarnFormat("Cutting multipatch feature {0} failed.",
GdbObjectUtils.ToString(feature));
_msg.Debug(e);
}
var appliedCutline = new CutPolyline(cutLineToUse);
appliedCutline.SuccessfulCut = success;
ProcessedCutLines?.Add(appliedCutline);
}
}
}