public override SegmentsPlane ReadPlane()
{
if (!_enumValid)
{
return(null);
}
int currentPart = Assert.NotNull(_segmentsEnum.Current).PartIndex;
int patchIndex = _indexedMultiPatch.GetPatchIndex(currentPart);
int endPart = currentPart;
var geometryCollection =
(IGeometryCollection)_indexedMultiPatch.BaseGeometry;
var maybeOuterRing = geometryCollection.Geometry[patchIndex] as IRing;
if (maybeOuterRing != null)
{
var multiPatch = (IMultiPatch)geometryCollection;
bool isBeginning = false;
multiPatch.GetRingType(maybeOuterRing, ref isBeginning);
if (isBeginning)
{
int followingRingCount =
multiPatch.FollowingRingCount[maybeOuterRing];
endPart += followingRingCount;
}
}
int segmentCount = _indexedMultiPatch.GetPartSegmentCount(currentPart);
var surfaceSegments = new List <SegmentProxy>(segmentCount)
{
_segmentsEnum.Current
};
while ((_enumValid = _segmentsEnum.MoveNext()) &&
Assert.NotNull(_segmentsEnum.Current).PartIndex <= endPart)
{
surfaceSegments.Add(_segmentsEnum.Current);
}
return(new SegmentsPlane(surfaceSegments,
esriGeometryType.esriGeometryMultiPatch));
}
public static List <int> GetInnerRingPartIndexes(
[NotNull] IIndexedMultiPatch indexedMultiPatch,
int outerRingPartIndex)
{
IMultiPatch multiPatch = indexedMultiPatch.BaseGeometry;
int outerRingIndex = indexedMultiPatch.GetPatchIndex(outerRingPartIndex);
var geometryCollection = (IGeometryCollection)multiPatch;
var outerRing = (IRing)geometryCollection.Geometry[outerRingIndex];
int followingRingCount = multiPatch.FollowingRingCount[outerRing];
// following rings must follow the outer ring directly
var result = new List <int>(followingRingCount);
for (int index = 0; index < followingRingCount; index++)
{
result.Add(index + outerRingPartIndex + 1);
}
return(result);
}