/// <summary>
/// Snaps to an edge closest to the given coordinates.
/// </summary>
/// <param name="routerDb">The router db.</param>
/// <param name="longitude">The longitude.</param>
/// <param name="latitude">The latitude.</param>
/// <param name="maxOffsetInMeter">The maximum offset in meter.</param>
/// <param name="profile">The profile to snap for.</param>
/// <returns>The snap point.</returns>
public static Result <SnapPoint> Snap(this RouterDb routerDb, double longitude, double latitude, float maxOffsetInMeter = 1000,
Profile profile = null)
{
ProfileHandler profileHandler = null;
if (profile != null)
{
profileHandler = routerDb.GetProfileHandler(profile);
}
var offset = 100;
while (offset < maxOffsetInMeter)
{
// calculate search box.
var offsets = (new Coordinate(longitude, latitude)).OffsetWithDistances(maxOffsetInMeter);
var latitudeOffset = System.Math.Abs(latitude - offsets.Latitude);
var longitudeOffset = System.Math.Abs(longitude - offsets.Longitude);
var box = (longitude - longitudeOffset, latitude - latitudeOffset, longitude + longitudeOffset,
latitude + latitudeOffset);
// make sure data is loaded.
routerDb.DataProvider?.TouchBox(box);
// snap to closest edge.
var snapPoint = routerDb.SnapInBox(box, (eEnum) =>
{
if (profileHandler == null)
{
return(true);
}
profileHandler.MoveTo(eEnum);
var canStop = profileHandler.CanStop;
return(canStop);
});
if (snapPoint.EdgeId != uint.MaxValue)
{
return(snapPoint);
}
offset *= 2;
}
return(new Result <SnapPoint>($"Could not snap to location: {longitude},{latitude}"));
}