/**
* Return true if the edge AB intersects the given edge of constant longitude.
*/
private static bool IntersectsLngEdge(S2Point a, S2Point b,
R1Interval lat, double lng)
{
// Return true if the segment AB intersects the given edge of constant
// longitude. The nice thing about edges of constant longitude is that
// they are straight lines on the sphere (geodesics).
return(S2.SimpleCrossing(a, b, S2LatLng.FromRadians(lat.Lo, lng)
.ToPoint(), S2LatLng.FromRadians(lat.Hi, lng).ToPoint()));
}
