private void btnSearch_Click(object sender, RoutedEventArgs e)
{
PointShape start = Points[((ComboBoxItem)cmbStart.SelectedItem).Content.ToString()];
PointShape end = Points[((ComboBoxItem)cmbEnd.SelectedItem).Content.ToString()];
LineShape startSegment = GetNearestSegment(start);
LineShape endSegment = GetNearestSegment(end);
LineShape route = new LineShape();
if (startSegment.Id == endSegment.Id)
{
route = startSegment.GetLineOnALine(start, end) as LineShape;
}
else
{
double tolerance = double.Parse(txtTolerance.Text, CultureInfo.InvariantCulture);
PolygonShape bufferedPolygon = endSegment.Buffer(tolerance, GeographyUnit.DecimalDegree, DistanceUnit.Meter).Polygons[0];
MultilineShape intersectedLines = startSegment.GetIntersection(bufferedPolygon) as MultilineShape;
if (intersectedLines.Lines.Count > 0) // Just check the intersected within allowed tolerance.
{
PointShape intersectedPoint = intersectedLines.Lines[0].GetCenterPoint();
PointShape nearestPointOnStart = intersectedPoint.GetClosestPointTo(startSegment, GeographyUnit.DecimalDegree);
PointShape nearestPointOnEnd = intersectedPoint.GetClosestPointTo(endSegment, GeographyUnit.DecimalDegree);
LineShape routeSegmentOnStart = startSegment.GetLineOnALine(start, nearestPointOnStart) as LineShape;
LineShape routeSegmentOnEnd = endSegment.GetLineOnALine(end, nearestPointOnEnd) as LineShape;
IEnumerable <Vertex> vertexs = route.Vertices;
int index = IndexOf(routeSegmentOnStart.Vertices, new Vertex(nearestPointOnStart));
if (index == 0)
{
vertexs = vertexs.Concat(routeSegmentOnStart.Vertices.Reverse());
}
else
{
vertexs = vertexs.Concat(routeSegmentOnStart.Vertices);
}
index = IndexOf(routeSegmentOnEnd.Vertices, new Vertex(nearestPointOnEnd));
if (index == 0)
{
vertexs = vertexs.Concat(routeSegmentOnEnd.Vertices);
}
else
{
vertexs = vertexs.Concat(routeSegmentOnEnd.Vertices.Reverse());
}
route = new LineShape(vertexs);
}
}
routeResultLayer.InternalFeatures.Clear();
if (route.Vertices.Count > 1)
{
routeResultLayer.InternalFeatures.Add(new Feature(route));
}
else
{
MessageBox.Show("No Route Found.");
}
Map1.Refresh();
}