protected override bool IndexOfAfterCheck(IGeometry linearGeom, Coordinate testPt)
{
var indexedLine = new LocationIndexedLine(linearGeom);
// check locations are consecutive
var loc1 = indexedLine.IndexOf(testPt);
var loc2 = indexedLine.IndexOfAfter(testPt, loc1);
if (loc2.CompareTo(loc1) <= 0)
{
return(false);
}
// check extracted points are the same as the input
var pt1 = indexedLine.ExtractPoint(loc1);
var pt2 = indexedLine.ExtractPoint(loc2);
if (!pt1.Equals2D(testPt))
{
return(false);
}
if (!pt2.Equals2D(testPt))
{
return(false);
}
return(true);
}
private LineString GetLineWithExtraPoints(LineString currentLine, Coordinate coordinateToAddIfNeeded)
{
var point = new Point(coordinateToAddIfNeeded);
if (currentLine.Distance(point) >= _options.MaxDistanceToExisitngLineForMerge * 2)
{
// coordinate not close enough
return(currentLine);
}
var closestCoordinateOnGpx = currentLine.Coordinates.OrderBy(c => c.Distance(coordinateToAddIfNeeded)).First();
if (closestCoordinateOnGpx.Distance(coordinateToAddIfNeeded) < 2 * _options.MaxDistanceToExisitngLineForMerge)
{
// line already has a close enough coordinate
return(currentLine);
}
// need to add a coordinate to the line
var coordinates = currentLine.Coordinates.ToList();
var line = new LocationIndexedLine(currentLine);
var projectedLocation = line.Project(coordinateToAddIfNeeded);
var coordinateToAdd = line.ExtractPoint(projectedLocation);
coordinates.Insert(projectedLocation.SegmentIndex + 1, coordinateToAdd);
return(_geometryFactory.CreateLineString(coordinates.ToArray()) as LineString);
}
protected override Coordinate ExtractOffsetAt(IGeometry linearGeom, Coordinate testPt, double offsetDistance)
{
var indexedLine = new LocationIndexedLine(linearGeom);
var index = indexedLine.IndexOf(testPt);
return(indexedLine.ExtractPoint(index, offsetDistance));
}