/// <summary>
/// Geocodes the origins and destinations.
/// </summary>
/// <returns>A task for geocoding the origins and destinations.</returns>
public async Task GeocodeWaypoints()
{
//Ensure all the origins are geocoded.
if (Origins != null)
{
await SimpleWaypoint.TryGeocodeWaypoints(Origins, this);
}
//Ensure all the destinations are geocoded.
if (Destinations != null)
{
await SimpleWaypoint.TryGeocodeWaypoints(Destinations, this);
}
}
/// <summary>
/// Creates a NxN distance matrix with straight line distances.
/// </summary>
/// <param name="waypoints">The waypoints to generate a matrix for.</param>
/// <param name="distanceUnits">The distance units to calculate the distances in.</param>
/// <param name="bingMapsKey">A bing maps key that can be used to geocode waypoints, if needed.</param>
/// <returns>A NxN distance matrix with straight line distances.</returns>
public static async Task <DistanceMatrix> CreateStraightLineNxNMatrix(List <SimpleWaypoint> waypoints, DistanceUnitType distanceUnits, string bingMapsKey)
{
//Ensure all the waypoints are geocoded.
if (waypoints == null || waypoints.Count < 2)
{
throw new Exception("Not enough Waypoints specified.");
}
if (!string.IsNullOrEmpty(bingMapsKey))
{
await SimpleWaypoint.TryGeocodeWaypoints(waypoints, bingMapsKey);
}
var numWaypoints = waypoints.Count;
var cells = new DistanceMatrixCell[numWaypoints * numWaypoints];
await Task.Run(() => Parallel.For(0, numWaypoints, i =>
{
for (var j = 0; j < numWaypoints; j++)
{
double distance = -1;
if (i != j && waypoints[i].Coordinate != null && waypoints[j].Coordinate != null)
{
distance = SpatialTools.HaversineDistance(waypoints[i].Coordinate, waypoints[j].Coordinate, distanceUnits);
}
cells[i * numWaypoints + j] = new DistanceMatrixCell()
{
OriginIndex = i,
DestinationIndex = j,
TravelDistance = distance
};
}
}));
return(new DistanceMatrix()
{
Origins = waypoints,
Destinations = waypoints,
Results = cells
});
}
