// Returns the minimum distance from X to the latitude line segment defined by
// the given latitude and longitude interval.
private static S1Angle GetDistance(S2LatLng x, S1Angle lat, S1Interval interval)
{
Assert.True(x.IsValid());
Assert.True(interval.IsValid());
// Is X inside the longitude interval?
if (interval.Contains(x.LngRadians))
{
return(S1Angle.FromRadians((x.Lat() - lat).Abs()));
}
// Return the distance to the closer endpoint.
return(new[] { x.GetDistance(new S2LatLng(lat, S1Angle.FromRadians(interval.Lo))),
x.GetDistance(new S2LatLng(lat, S1Angle.FromRadians(interval.Hi))) }.Min());
}
/**
* Returns the minimum distance from X to the latitude line segment defined by
* the given latitude and longitude interval.
*/
private static S1Angle getDistance(S2LatLng x, S1Angle lat, S1Interval interval)
{
assertTrue(x.IsValid);
assertTrue(interval.IsValid);
// Is X inside the longitude interval?
if (interval.Contains(x.Lng.Radians))
{
return(S1Angle.FromRadians(Math.Abs(x.Lat.Radians - lat.Radians)));
}
// Return the distance to the closer endpoint.
return(S1Angle.Min(x.GetDistance(new S2LatLng(lat, S1Angle.FromRadians(interval.Lo))),
x.GetDistance(new S2LatLng(lat, S1Angle.FromRadians(interval.Hi)))));
}
/**
* Returns the minimum distance from X to the latitude line segment defined by
* the given latitude and longitude interval.
*/
private static S1Angle getDistance(S2LatLng x, S1Angle lat, S1Interval interval)
{
assertTrue(x.IsValid);
assertTrue(interval.IsValid);
// Is X inside the longitude interval?
if (interval.Contains(x.Lng.Radians))
return S1Angle.FromRadians(Math.Abs(x.Lat.Radians - lat.Radians));
// Return the distance to the closer endpoint.
return S1Angle.Min(x.GetDistance(new S2LatLng(lat, S1Angle.FromRadians(interval.Lo))),
x.GetDistance(new S2LatLng(lat, S1Angle.FromRadians(interval.Hi))));
}
