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Added closest waypoint function

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This commit is contained in:
Luke Else 2022-02-18 21:13:21 +00:00
parent 5316df08a5
commit e271e49374
1 changed files with 38 additions and 3 deletions
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41
Controllers/FlightsimController.cs
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@ -8,6 +8,7 @@ using EFB.Sessions;
using Microsoft.Extensions.Logging; using Microsoft.Extensions.Logging;
using EFB.Models; using EFB.Models;
using EFB.MongoData; using EFB.MongoData;
using EFB.Models.Route;
namespace EFB.Controllers namespace EFB.Controllers
{ {
@ -30,13 +31,47 @@ namespace EFB.Controllers
//Retrieve the user's latest sim position and construct it into FlightsimModel //Retrieve the user's latest sim position and construct it into FlightsimModel
if (user.Route == null) return RedirectToAction("Index", "Route"); if (user.Route == null) return RedirectToAction("Index", "Route");
SimPositionModel latestPosition = await Mongo.GetLatestData(user.EMail); SimPositionModel latestPositionModel = await Mongo.GetLatestData(user.EMail);
RouteModel route = await RouteModel.StringToRoute(user.Departure, user.Arrival, user.Cruise, user.Route);
return View(new FlightsimModel(latestPosition, null)); RouteModel route = await RouteModel.StringToRoute(user.Departure, user.Arrival, user.Cruise, user.Route);
IWaypoint closest = DetermineClosest(route, latestPositionModel.LatestPosition);
return View(new FlightsimModel(latestPositionModel, closest));
} }
private IWaypoint DetermineClosest(RouteModel route, SimPosition currentPosition){
IWaypoint closest = null;
float closestDistance = float.MaxValue;
//Assuming that we are on the earth for simplicity
IWaypoint waypoint = route.Departure;
while (waypoint.Next != null)
{
int earthRadius = 6371;
float distanceLat = DegreesToRadians(waypoint.Latitude - currentPosition.Latitude);
float distanceLon = DegreesToRadians(waypoint.Longitude - currentPosition.Longitude);
float latitude1 = DegreesToRadians(currentPosition.Latitude);
float latitude2 = DegreesToRadians(waypoint.Latitude);
var a = Math.Sin(distanceLat/2) * Math.Sin(distanceLat/2) + Math.Sin(distanceLon/2) * Math.Sin(distanceLon/2) * Math.Cos(latitude1) * Math.Cos(latitude2);
var c = 2 * Math.Atan2(Math.Sqrt(a), Math.Sqrt(1-a));
float distance = (float)(earthRadius * c);
if (distance < closestDistance)
{
closest = waypoint;
closestDistance = distance;
}
waypoint = waypoint.Next;
}
return closest;
}
private float DegreesToRadians(float degrees){
return (float)(degrees * Math.PI / 180);
}
[ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)] [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
public IActionResult Error() public IActionResult Error()
{ {