ClemensFischer/XAML-Map-Control
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Version 5.0: Separated map projection and view transform.

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ClemensF 2020-03-26 19:08:20 +01:00
parent 53723844a0
commit c7cb2efcdb
47 changed files with 401 additions and 382 deletions
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20
MapControl/Shared/OrthographicProjection.cs
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@ -19,31 +19,31 @@ namespace MapControl
CrsId = "AUTO2:42003";
}
public override Point LocationToPoint(Location location)
public override Point LocationToMap(Location location)
{
if (location.Equals(ProjectionCenter))
if (location.Equals(Center))
{
return new Point();
}
var lat0 = ProjectionCenter.Latitude * Math.PI / 180d;
var lat0 = Center.Latitude * Math.PI / 180d;
var lat = location.Latitude * Math.PI / 180d;
var dLon = (location.Longitude - ProjectionCenter.Longitude) * Math.PI / 180d;
var s = TrueScale * 180d / Math.PI;
var dLon = (location.Longitude - Center.Longitude) * Math.PI / 180d;
var s = UnitsPerDegree * 180d / Math.PI;
return new Point(
s * Math.Cos(lat) * Math.Sin(dLon),
s * (Math.Cos(lat0) * Math.Sin(lat) - Math.Sin(lat0) * Math.Cos(lat) * Math.Cos(dLon)));
}
public override Location PointToLocation(Point point)
public override Location MapToLocation(Point point)
{
if (point.X == 0d && point.Y == 0d)
{
return new Location(ProjectionCenter.Latitude, ProjectionCenter.Longitude);
return new Location(Center.Latitude, Center.Longitude);
}
var s = TrueScale * 180d / Math.PI;
var s = UnitsPerDegree * 180d / Math.PI;
var x = point.X / s;
var y = point.Y / s;
var r2 = x * x + y * y;
@ -57,13 +57,13 @@ namespace MapControl
var sinC = r;
var cosC = Math.Sqrt(1 - r2);
var lat0 = ProjectionCenter.Latitude * Math.PI / 180d;
var lat0 = Center.Latitude * Math.PI / 180d;
var cosLat0 = Math.Cos(lat0);
var sinLat0 = Math.Sin(lat0);
return new Location(
180d / Math.PI * Math.Asin(cosC * sinLat0 + y * sinC * cosLat0 / r),
180d / Math.PI * Math.Atan2(x * sinC, r * cosC * cosLat0 - y * sinC * sinLat0) + ProjectionCenter.Longitude);
180d / Math.PI * Math.Atan2(x * sinC, r * cosC * cosLat0 - y * sinC * sinLat0) + Center.Longitude);
}
}
}