private IPolyline GetNonLinearSubpart(int startSegmentIndex, double startFraction,
int endSegmentIndex, double endFraction)
{
var subpart = new PolylineClass();
IPointCollection4 points = subpart;
ISegmentCollection segs = subpart;
subpart.SpatialReference = SpatialReference;
bool hasNonLinearParts = false;
object missing = Type.Missing;
SegmentProxy segProxy;
AoSegmentProxy aoSegProxy;
#region startSegment
var currentWksPoints = new List <WKSPointZ>();
if (_nonLinearSegments.TryGetValue(startSegmentIndex, out aoSegProxy))
{
hasNonLinearParts = true;
ISegment seg = aoSegProxy.InnerSegment;
ICurve part;
double end = 1;
if (endSegmentIndex == startSegmentIndex)
{
end = endFraction;
}
seg.GetSubcurve(startFraction, end, true, out part);
segs.AddSegment((ISegment)part, ref missing, ref missing);
}
else
{
segProxy = GetSegment(startSegmentIndex);
IPnt p = segProxy.GetPointAt(startFraction, as3D: true);
currentWksPoints.Add(QaGeometryUtils.GetWksPoint(p));
}
#endregion
#region segments
for (int i = startSegmentIndex + 1; i < endSegmentIndex; i++)
{
if (_nonLinearSegments.TryGetValue(i, out aoSegProxy))
{
hasNonLinearParts = true;
if (currentWksPoints.Count > 0)
{
currentWksPoints.Add(_points[i]);
WKSPointZ[] add = currentWksPoints.ToArray();
GeometryUtils.AddWKSPointZs(points, add);
currentWksPoints.Clear();
}
ISegment seg = GeometryFactory.Clone(aoSegProxy.InnerSegment);
segs.AddSegment(seg, ref missing, ref missing);
}
else
{
currentWksPoints.Add(_points[i]);
}
}
#endregion
#region endsegment
if (startSegmentIndex == endSegmentIndex)
{
if (currentWksPoints.Count > 0)
{
segProxy = GetSegment(endSegmentIndex);
IPnt p = segProxy.GetPointAt(endFraction, as3D: true);
currentWksPoints.Add(QaGeometryUtils.GetWksPoint(p));
WKSPointZ[] add = currentWksPoints.ToArray();
GeometryUtils.AddWKSPointZs(points, add);
}
}
else
{
if (_nonLinearSegments.TryGetValue(endSegmentIndex, out aoSegProxy))
{
hasNonLinearParts = false;
if (currentWksPoints.Count > 0)
{
currentWksPoints.Add(_points[endSegmentIndex]);
WKSPointZ[] add = currentWksPoints.ToArray();
GeometryUtils.AddWKSPointZs(points, add);
currentWksPoints.Clear();
}
ISegment seg = aoSegProxy.InnerSegment;
ICurve part;
seg.GetSubcurve(0, endFraction, true, out part);
segs.AddSegment((ISegment)part, ref missing, ref missing);
}
else
{
currentWksPoints.Add(_points[endSegmentIndex]);
segProxy = GetSegment(endSegmentIndex);
IPnt p = segProxy.GetPointAt(endFraction, as3D: true);
currentWksPoints.Add(QaGeometryUtils.GetWksPoint(p));
WKSPointZ[] add = currentWksPoints.ToArray();
GeometryUtils.AddWKSPointZs(points, add);
}
}
#endregion
if (hasNonLinearParts)
{
var topoOp = (ITopologicalOperator2)subpart;
topoOp.IsKnownSimple_2 = false;
topoOp.Simplify();
}
return(subpart);
}