dotnet/examples/ManagedCPP/example-Gnomonic.cpp

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using namespace System;
using namespace NETGeographicLib;

int main(array<System::String ^> ^/*args*/)
{
    try {
        Geodesic^ geod = gcnew Geodesic(); // WGS84
        const double lat0 = 48 + 50/60.0, lon0 = 2 + 20/60.0; // Paris
        Gnomonic^ proj = gcnew Gnomonic(geod);
        {
            // Sample forward calculation
            double lat = 50.9, lon = 1.8; // Calais
            double x, y;
            proj->Forward(lat0, lon0, lat, lon, x, y);
            Console::WriteLine(String::Format("X: {0} Y: {1}", x, y));
        }
        {
            // Sample reverse calculation
            double x = -38e3, y = 230e3;
            double lat, lon;
            proj->Reverse(lat0, lon0, x, y, lat, lon);
            Console::WriteLine(String::Format("Latitude: {0} Longitude: {1}", lat, lon));
        }
    }
    catch (GeographicErr^ e) {
        Console::WriteLine(String::Format("Caught exception: {0}", e->Message));
        return -1;
    }
    return 0;
}