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example.cpp
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example.cpp
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#include "osrm/match_parameters.hpp"
#include "osrm/nearest_parameters.hpp"
#include "osrm/route_parameters.hpp"
#include "osrm/table_parameters.hpp"
#include "osrm/trip_parameters.hpp"
#include "osrm/coordinate.hpp"
#include "osrm/engine_config.hpp"
#include "osrm/json_container.hpp"
#include "osrm/osrm.hpp"
#include "osrm/status.hpp"
#include <exception>
#include <iostream>
#include <string>
#include <utility>
#include <cstdlib>
int main(int argc, const char *argv[])
{
if (argc < 2)
{
std::cerr << "Usage: " << argv[0] << " data.osrm\n";
return EXIT_FAILURE;
}
using namespace osrm;
// Configure based on a .osrm base path, and no datasets in shared mem from osrm-datastore
EngineConfig config;
config.storage_config = {argv[1]};
config.use_shared_memory = false;
// We support two routing speed up techniques:
// - Contraction Hierarchies (CH): requires extract+contract pre-processing
// - Multi-Level Dijkstra (MLD): requires extract+partition+customize pre-processing
//
// config.algorithm = EngineConfig::Algorithm::CH;
config.algorithm = EngineConfig::Algorithm::MLD;
// Routing machine with several services (such as Route, Table, Nearest, Trip, Match)
const OSRM osrm{config};
// The following shows how to use the Route service; configure this service
RouteParameters params;
// Route in monaco
params.coordinates.push_back({util::FloatLongitude{7.419758}, util::FloatLatitude{43.731142}});
params.coordinates.push_back({util::FloatLongitude{7.419505}, util::FloatLatitude{43.736825}});
// Response is in JSON format
engine::api::ResultT result = json::Object();
// Execute routing request, this does the heavy lifting
const auto status = osrm.Route(params, result);
auto &json_result = std::get<json::Object>(result);
if (status == Status::Ok)
{
auto &routes = std::get<json::Array>(json_result.values["routes"]);
// Let's just use the first route
auto &route = std::get<json::Object>(routes.values.at(0));
const auto distance = std::get<json::Number>(route.values["distance"]).value;
const auto duration = std::get<json::Number>(route.values["duration"]).value;
// Warn users if extract does not contain the default coordinates from above
if (distance == 0 || duration == 0)
{
std::cout << "Note: distance or duration is zero. ";
std::cout << "You are probably doing a query outside of the OSM extract.\n\n";
}
std::cout << "Distance: " << distance << " meter\n";
std::cout << "Duration: " << duration << " seconds\n";
return EXIT_SUCCESS;
}
else if (status == Status::Error)
{
const auto code = std::get<json::String>(json_result.values["code"]).value;
const auto message = std::get<json::String>(json_result.values["message"]).value;
std::cout << "Code: " << code << "\n";
std::cout << "Message: " << code << "\n";
return EXIT_FAILURE;
}
}