public EDDBStation GetClosestStation(EdsmCoords coords)
{
var closestSystemId = systems.Select(
system =>
new
{
system.id,
distance =
Math.Sqrt(Math.Pow(coords.X - system.x, 2) + Math.Pow(coords.Y - system.y, 2) + Math.Pow(coords.Z - system.z, 2))
}).OrderBy(x => x.distance).First().id;
EDDBStation station =
stations.Where(st => st.system_id == closestSystemId && st.distance_to_star != null)
.OrderBy(st => st.distance_to_star)
.FirstOrDefault();
return station;
}
/* Attempts to calculate a distance in lightyears between two given systems.
* This is done using EDSM coordinates.
* TODO: Once done with testing, transition source to be a <List>TravelLog.
* TODO: Wait - this is not smart. CalculateEDSMDistance should just give you
* the distances between those two systems, not do any stunts with the source.
* Move this functionality out of there, and leave CED requiring a valid source
* coord - maybe even require source to be type EDSMCoords.
*/
public double CalculateEDSMDistance(string source, string target)
{
EdsmCoords sourcecoords = new EdsmCoords();
EdsmCoords targetcoords = new EdsmCoords();
IEnumerable<EdsmSystem> candidates;
if (source == target)
return 0; /* Well, it COULD happen? People have been known to do stupid things. */
foreach (TravelLog mysource in myTravelLog.Reverse())
{
if (mysource.system.Coords == null)
{
AppendStatus("System in travellog has no coords:" + mysource.system.Name);
}
else
{
AppendStatus("Found coord'ed system " + mysource.system.Name + ", using as source.");
sourcecoords = mysource.system.Coords;
}
}
if (sourcecoords == null || source == "Fuelum")
{
AppendStatus("Search for travellog coordinated system failed, using Fuelum coords");
// Add a static Fuelum system reference so we don't have to query EDSM for it.
sourcecoords = fuelumCoords;
}
candidates = QueryEDSMSystem(target);
if (candidates == null || candidates.Count() < 1)
{
AppendStatus("EDSM does not know that system. Widening search...");
candidates = GetCandidateSystems(target);
}
if (candidates.FirstOrDefault().Coords == null)
{
AppendStatus("Known system, but no coords. Widening search...");
candidates = GetCandidateSystems(target);
}
if (candidates == null || candidates.Count() < 1)
{
//Still couldn't find something, abort.
AppendStatus("Couldn't find a candidate system, aborting...");
return -1;
}
else
{
AppendStatus("I got " + candidates.Count() + " systems with coordinates. Picking the first.");
targetcoords = candidates.FirstOrDefault().Coords;
}
if (sourcecoords != null && targetcoords != null)
{
AppendStatus("We have two sets of coords that we can use to find a distance.");
double deltaX = sourcecoords.X - targetcoords.X;
double deltaY = sourcecoords.Y - targetcoords.Y;
double deltaZ = sourcecoords.Z - targetcoords.Z;
double distance = (double) Math.Sqrt(deltaX*deltaX + deltaY*deltaY + deltaZ*deltaZ);
AppendStatus("Distance should be " + distance.ToString());
return distance;
}
else
{
AppendStatus("Failed to find target coords. Giving up.");
return -1;
}
}
public async Task<ClientDistance> GetDistanceToClient(string target)
{
int logdepth = 0;
EdsmCoords targetcoords =new EdsmCoords();
ClientDistance cd = new ClientDistance();
EdsmCoords sourcecoords = FuelumCoords;
EdsmSystem sourceSystem = new EdsmSystem();
sourceSystem.Name = "Fuelum";
sourceSystem.Coords = FuelumCoords;
cd.SourceCertainty = "Fuelum";
if (_myTravelLog!=null)
{
foreach (TravelLog mysource in _myTravelLog.Reverse())
{
if (mysource.System.Coords == null)
{
logdepth++;
}
else
{
Logger.Debug("Found TL system to use: " + mysource.System.Name);
sourcecoords = mysource.System.Coords;
if (logdepth == 0)
{
cd.SourceCertainty = "Exact";
sourceSystem = mysource.System;
break;
}
else
{
cd.SourceCertainty = logdepth.ToString();
sourceSystem = mysource.System;
break;
}
}
}
}
IEnumerable<EdsmSystem> candidates = await QueryEdsmSystem(target);
cd.TargetCertainty = "Exact";
if (!candidates.Any())
{
Logger.Debug("EDSM does not know system '" + target + "'. Widening search...");
candidates = await GetCandidateSystems(target);
cd.TargetCertainty = "Nearby";
}
EdsmSystem firstOrDefault = candidates.FirstOrDefault();
if (firstOrDefault != null && firstOrDefault.Coords == null)
{
Logger.Debug("Known system '" + target + "', but no coords. Widening search...");
candidates = await GetCandidateSystems(target);
cd.TargetCertainty = "Region";
}
if (candidates == null || !candidates.Any())
{
//Still couldn't find something, abort.
AppendStatus("Couldn't find a candidate system, aborting...");
return new ClientDistance();
}
Logger.Debug("We have two sets of coords that we can use to find a distance.");
EdsmSystem edsmSystem = candidates.FirstOrDefault();
if (edsmSystem != null) targetcoords = edsmSystem.Coords;
if(sourceSystem == null || sourceSystem.Name==null)
{
Logger.Debug("Err... Source system (or its name) is null, that shouldn't happen at this point. Bailing!");
return new ClientDistance();
}
Logger.Debug("Finding from coords: " + sourcecoords.X + " " + sourcecoords.Y + " " + sourcecoords.Z + " ("+sourceSystem.Name+") to " + targetcoords.X + " " + targetcoords.Y + " " + targetcoords.Z+" ("+edsmSystem.Name+")");
double deltaX = sourcecoords.X - targetcoords.X;
double deltaY = sourcecoords.Y - targetcoords.Y;
double deltaZ = sourcecoords.Z - targetcoords.Z;
double distance = Math.Sqrt(deltaX * deltaX + deltaY * deltaY + deltaZ * deltaZ);
Logger.Debug("Distance should be " + distance);
cd.Distance = distance;
return cd;
}
/* Attempts to calculate a distance in lightyears between two given systems.
* This is done using EDSM coordinates.
*
* Transitioned to be exact source system, searches for nearest for target.
* For the client distance calculation, call GetDistanceToClient instead.
*/
public async Task<double> CalculateEdsmDistance(string source, string target)
{
try {
EdsmCoords sourcecoords = new EdsmCoords();
if (source == target)
{
return 0; /* Well, it COULD happen? People have been known to do stupid things. */
}
if (source == null)
{
/* Dafuq? */
Logger.Fatal("Null value passed as source to CalculateEDSMDistance! Falling back to Fuelum as source.");
source = "Fuelum";
}
if (source.Length < 3)
{
AppendStatus("Source system name '" + source + "' too short, searching from Fuelum.");
source = "Fuelum";
}
if (target.Length < 3)
{
AppendStatus("Target system name '" + target + "' is too short. Can't perform distance search.");
return -1;
}
IEnumerable<EdsmSystem> candidates = await QueryEdsmSystem(source);
if (candidates == null || !candidates.Any())
{
Logger.Debug("Unknown source system.");
return -1;
}
candidates = await QueryEdsmSystem(target);
var edsmSystems = candidates as EdsmSystem[] ?? candidates.ToArray();
if (!edsmSystems.Any())
{
Logger.Debug("EDSM does not know system '" + target + "'. Widening search...");
candidates = await GetCandidateSystems(target);
}
EdsmSystem firstOrDefault = edsmSystems.FirstOrDefault();
if (firstOrDefault != null && firstOrDefault.Coords == null)
{
Logger.Debug("Known system '" + target + "', but no coords. Widening search...");
candidates = await GetCandidateSystems(target);
}
if (candidates == null || !edsmSystems.Any())
{
//Still couldn't find something, abort.
AppendStatus("Couldn't find a candidate system, aborting...");
return -1;
}
Logger.Debug("I got " + edsmSystems.Count() + " systems with coordinates. Sorting by lexical match and picking first.");
var sorted = edsmSystems.OrderBy(s => LexicalOrder(target, s.Name));
EdsmSystem edsmSystem = sorted.FirstOrDefault();
EdsmCoords targetcoords = edsmSystem?.Coords;
if (targetcoords != null)
{
Logger.Debug("We have two sets of coords that we can use to find a distance.");
double deltaX = sourcecoords.X - targetcoords.X;
double deltaY = sourcecoords.Y - targetcoords.Y;
double deltaZ = sourcecoords.Z - targetcoords.Z;
double distance = Math.Sqrt(deltaX * deltaX + deltaY * deltaY + deltaZ * deltaZ);
Logger.Debug("Distance should be " + distance);
return distance;
}
AppendStatus("EDSM failed to find coords for system '" + target + "'.");
return -1;
}
catch(Exception ex)
{
Logger.Fatal("Exception in CalculateEdsmDistance: " + ex.Message);
_tc.TrackException(ex);
return -1;
}
}
public EddbStation GetClosestStation(EdsmCoords coords)
{
try {
Logger.Debug("Calculating closest station to X:" + coords.X + " Y:" + coords.Y + " Z:" + coords.Z);
var closestSystemId = Systems.Where(system => system.population > 0).Select(
system =>
new
{
system.id,system.population,
distance =
Math.Sqrt(Math.Pow(coords.X - system.x, 2) + Math.Pow(coords.Y - system.y, 2) + Math.Pow(coords.Z - system.z, 2))
}).OrderBy(x => x.distance).First().id;
Logger.Debug("Got system " + closestSystemId);
EddbStation station =
Stations.Where(st => st.system_id == closestSystemId && st.distance_to_star != null)
.OrderBy(st => st.distance_to_star)
.FirstOrDefault();
if (station != null)
{
Logger.Debug("Got station " + station.name);
return station;
}
return new EddbStation();
}
catch (Exception ex)
{
Logger.Fatal("Exception in GetClosestStation: " + ex.Message);
return new EddbStation();
}
}
