torstenandCopilot
342ffd3e5c
- HandlerMinelayerData: BUILD_RTI Guards für RTI-Abhängigkeiten - svcTabCommon: Export-Header-Fix via Fallback-Target - TrainingAreaBase: Stub-Header für BUILD_RTI=OFF - ddsfts: Include-Pfad und Dependency-Fixes - BUILD_RTI=OFF Compilation vollständig unterstützt Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Entire-Checkpoint: 01M0JNZA586SACX1PRZ2DJAE5S
70 lines
2.5 KiB
C++
70 lines
2.5 KiB
C++
// Example of using the GeographicLib::GeodesicLine class
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#include <iostream>
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#include <iomanip>
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#include <exception>
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#include <cmath>
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#include <GeographicLib/Geodesic.hpp>
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#include <GeographicLib/GeodesicLine.hpp>
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#include <GeographicLib/Constants.hpp>
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using namespace std;
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using namespace GeographicLib;
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int main() {
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try {
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// Print waypoints between JFK and SIN
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Geodesic geod(Constants::WGS84_a(), Constants::WGS84_f());
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// Alternatively: const Geodesic& geod = Geodesic::WGS84();
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double
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lat1 = 40.640, lon1 = -73.779, // JFK
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lat2 = 1.359, lon2 = 103.989; // SIN
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GeodesicLine line = geod.InverseLine(lat1, lon1, lat2, lon2);
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double ds0 = 500e3; // Nominal distance between points = 500 km
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int num = int(ceil(line.Distance() / ds0)); // The number of intervals
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cout << fixed << setprecision(3);
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{
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// Use intervals of equal length
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double ds = line.Distance() / num;
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for (int i = 0; i <= num; ++i) {
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double lat, lon;
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line.Position(i * ds, lat, lon);
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cout << i << " " << lat << " " << lon << "\n";
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}
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}
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{
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// Slightly faster, use intervals of equal arc length
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double da = line.Arc() / num;
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for (int i = 0; i <= num; ++i) {
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double lat, lon;
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line.ArcPosition(i * da, lat, lon);
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cout << i << " " << lat << " " << lon << "\n";
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}
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}
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{
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// Check that the inspection functions for exact = true return the same
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// as for GeodesicLineExact.
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Geodesic geoda(6.4e6, 0.5, true);
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GeodesicExact geodb(6.4e6, 0.5);
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GeodesicLine linea = geoda.InverseLine(lat1, lon1, lat2, lon2);
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GeodesicLineExact lineb = geodb.InverseLine(lat1, lon1, lat2, lon2);
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if (! (linea.Init() == lineb.Init() &&
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linea.Latitude() == lineb.Latitude() &&
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linea.Longitude() == lineb.Longitude() &&
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linea.Azimuth() == lineb.Azimuth() &&
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linea.EquatorialAzimuth() == lineb.EquatorialAzimuth() &&
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linea.EquatorialArc() == lineb.EquatorialArc() &&
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linea.EquatorialRadius() == lineb.EquatorialRadius() &&
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linea.Flattening() == lineb.Flattening() &&
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linea.Capabilities() == lineb.Capabilities() &&
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linea.Distance() == lineb.Distance() &&
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linea.Arc() == lineb.Arc()) )
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cerr << "Incompatible results compared to GeodesicLineExact\n";
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}
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}
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catch (const exception& e) {
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cerr << "Caught exception: " << e.what() << "\n";
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return 1;
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}
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}
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