/// <summary>
/// Searches for geographical locations synchronously.
/// </summary>
/// <param name="searchString">String to search</param>
/// <returns>List of location items matching the specified search string</returns>
private List <LocationSearchItem> Search(string searchString)
{
if (searchString.Length == 0)
{
return(new List <LocationSearchItem>());
}
return(_LocationsManager.Search(searchString, 10).Select(c => new LocationSearchItem()
{
Country = c.CountryCode,
Location = c,
Name = c.LocationName,
Names = string.Join(", ", c.OtherNames)
}).ToList());
}
/// <inheritdoc/>
public ICollection <SolarEclipseLocalCircumstances> FindCitiesOnCentralLine(PolynomialBesselianElements be, ICollection <CrdsGeographical> centralLine, CancellationToken?cancelToken = null, IProgress <double> progress = null)
{
var cities = new List <CrdsGeographical>();
for (int i = 0; i < centralLine.Count - 1; i++)
{
// Report progess
progress?.Report((double)(i + 1) / centralLine.Count * 100);
// Exit loop if cancel requested
if (cancelToken?.IsCancellationRequested == true)
{
return(new SolarEclipseLocalCircumstances[0]);
}
// 2 successive points create a central line segment
var g0 = centralLine.ElementAt(i);
var g1 = centralLine.ElementAt(i + 1);
// Segment length, distance between 2 points on central line, in kilometers
var length = g0.DistanceTo(g1);
// Local circumstances at point "g0"
var local = SolarEclipses.LocalCircumstances(be, g0);
// Lunar umbra radius, in kilometers
float r = (float)(local.PathWidth / 2);
float r0 = r;
if (r < 10)
{
r = 10;
}
if (r > 0)
{
// Count of parts the segment should be splitted
int parts = (int)Math.Round(length / r);
// If the segment should be splitted
if (parts > 1)
{
// Find intermediate points and add closest cities
for (int j = 0; j < parts; j++)
{
// Exit loop if cancel requested
if (cancelToken?.IsCancellationRequested == true)
{
return(new SolarEclipseLocalCircumstances[0]);
}
var g = Angle.Intermediate(g0, g1, (float)j / parts);
var locations = locationsManager.Search(g, r);
cities.AddRange(locations.Where(loc => loc.DistanceTo(g) <= r0));
}
}
// The segment should not be splitted, add closest cities to the first point
else
{
var locations = locationsManager.Search(g0, r);
cities.AddRange(locations.Where(loc => loc.DistanceTo(g0) <= r0));
}
}
}
return(FindLocalCircumstancesForCities(be, cities, cancelToken, progress));
}