private static IEnumerable <IPoint> QueryEndpoints([NotNull] IPolyline polyline,
[NotNull] IPoint template)
{
var parts = (IGeometryCollection)polyline;
int partCount = parts.GeometryCount;
if (partCount == 0)
{
yield break;
}
if (partCount == 1)
{
polyline.QueryFromPoint(template);
yield return(template);
polyline.QueryToPoint(template);
yield return(template);
}
else
{
for (var i = 0; i < partCount; i++)
{
var path = (IPath)parts.Geometry[i];
path.QueryFromPoint(template);
yield return(template);
path.QueryToPoint(template);
yield return(template);
}
}
}
private static IEnumerable <IPoint> GetEndpoints([NotNull] IPolyline polyline,
[NotNull] IPoint fromPointTemplate,
[NotNull] IPoint toPointTemplate)
{
polyline.QueryFromPoint(fromPointTemplate);
polyline.QueryToPoint(toPointTemplate);
yield return(fromPointTemplate);
yield return(toPointTemplate);
}
private static CurveMeasureRange CreateMeasureRange([NotNull] IPolyline polyline,
double mMin, double mMax,
int oid, int tableIndex,
int partIndex)
{
Assert.ArgumentNotNull(polyline, nameof(polyline));
var result = new CurveMeasureRange(oid, tableIndex, mMin, mMax, partIndex);
polyline.QueryFromPoint(_pointTemplate.Value);
AssignEndPoint(result, _pointTemplate.Value, mMin, mMax);
polyline.QueryToPoint(_pointTemplate.Value);
AssignEndPoint(result, _pointTemplate.Value, mMin, mMax);
return(result);
}
public static bool SnapPoint([NotNull] IPoint newEndPoint,
[NotNull] IList <IFeature> candidateTargetEdges,
[NotNull] ILinearNetworkFeatureFinder networkFeatureFinder)
{
if (networkFeatureFinder.SearchTolerance <= 0)
{
return(false);
}
Pnt2D newEndPnt = new Pnt2D(newEndPoint.X, newEndPoint.Y);
IPoint fromPoint = new PointClass()
{
SpatialReference = newEndPoint.SpatialReference
};
IPoint toPoint = new PointClass()
{
SpatialReference = newEndPoint.SpatialReference
};
double searchToleranceSquared = networkFeatureFinder.SearchTolerance *
networkFeatureFinder.SearchTolerance;
bool snapped = false;
foreach (IFeature feature in candidateTargetEdges)
{
IPolyline otherPolyline = (IPolyline)feature.Shape;
otherPolyline.QueryFromPoint(fromPoint);
Pnt2D fromPnt = new Pnt2D(fromPoint.X, fromPoint.Y);
double fromDistance2 = fromPnt.Dist2(newEndPnt);
otherPolyline.QueryToPoint(toPoint);
Pnt2D toPnt = new Pnt2D(toPoint.X, toPoint.Y);
double toDistance2 = toPnt.Dist2(newEndPnt);
if (fromDistance2 > searchToleranceSquared && toDistance2 > searchToleranceSquared)
{
continue;
}
if (Math.Min(fromDistance2, toDistance2) < GetXyResolutionSquared(feature))
{
// already snapped
continue;
}
IPoint sourcePoint = fromDistance2 < toDistance2 ? fromPoint : toPoint;
snapped = true;
CopyCoords(sourcePoint, newEndPoint);
}
if (!snapped)
{
// Try snapping onto curve interior
foreach (IFeature feature in candidateTargetEdges)
{
IPolyline otherPolyline = (IPolyline)feature.Shape;
double distanceFromCurve =
GeometryUtils.GetDistanceFromCurve(newEndPoint, otherPolyline, fromPoint);
if (distanceFromCurve >= 0 &&
distanceFromCurve < networkFeatureFinder.SearchTolerance)
{
snapped = true;
CopyCoords(fromPoint, newEndPoint);
}
}
}
return(snapped);
}
