astar_driver.cpp File Reference

#include "drivers/astar/astar_driver.h"
#include <sstream>
#include <deque>
#include <algorithm>
#include <vector>
#include "astar/pgr_astar.hpp"
#include "cpp_common/pgr_alloc.hpp"
#include "cpp_common/pgr_assert.h"

Include dependency graph for astar_driver.cpp:

Go to the source code of this file.

Functions
void	do_pgr_astarManyToMany (Pgr_edge_xy_t *edges, size_t total_edges, pgr_combination_t *combinations, size_t total_combinations, int64_t *start_vidsArr, size_t size_start_vidsArr, int64_t *end_vidsArr, size_t size_end_vidsArr, bool directed, int heuristic, double factor, double epsilon, bool only_cost, bool normal, General_path_element_t **return_tuples, size_t *return_count, char **log_msg, char **notice_msg, char **err_msg)
template<class G >
std::deque< Path >	pgr_astar (G &graph, std::vector< pgr_combination_t > &combinations, std::vector< int64_t > sources, std::vector< int64_t > targets, int heuristic, double factor, double epsilon, bool only_cost, bool normal)

Function Documentation

do_pgr_astarManyToMany()

void do_pgr_astarManyToMany	(	Pgr_edge_xy_t *	edges,
		size_t	total_edges,
		pgr_combination_t *	combinations,
		size_t	total_combinations,
		int64_t *	start_vidsArr,
		size_t	size_start_vidsArr,
		int64_t *	end_vidsArr,
		size_t	size_end_vidsArr,
		bool	directed,
		int	heuristic,
		double	factor,
		double	epsilon,
		bool	only_cost,
		bool	normal,
		General_path_element_t **	return_tuples,
		size_t *	return_count,
		char **	log_msg,
		char **	notice_msg,
		char **	err_msg
	)

Definition at line 86 of file astar_driver.cpp.

                        {
    std::ostringstream log;
    std::ostringstream notice;
    std::ostringstream err;
    try {
        pgassert(!(*log_msg));
        pgassert(!(*err_msg));
        pgassert(!(*return_tuples));
        pgassert(*return_count == 0);
        pgassert(total_edges != 0);
 
 
        log << "Inserting target vertices into a c++ vector structure\n";
        std::vector<pgr_combination_t>
                combinations_vector(combinations, combinations + total_combinations);
        std::vector< int64_t > end_vids(
                end_vidsArr,
                end_vidsArr + size_end_vidsArr);
        std::vector< int64_t > start_vids(
                start_vidsArr,
                start_vidsArr + size_start_vidsArr);
 
        graphType gType = directed? DIRECTED: UNDIRECTED;
 
        std::deque< Path >paths;
        if (directed) {
            log << "Working with directed Graph\n";
            pgrouting::xyDirectedGraph digraph(
                    pgrouting::extract_vertices(edges, total_edges),
                    gType);
            digraph.insert_edges(edges, total_edges);
            paths = pgr_astar(digraph, combinations_vector, start_vids, end_vids,
                    heuristic, factor, epsilon, only_cost, normal);
        } else {
            log << "Working with Undirected Graph\n";
            pgrouting::xyUndirectedGraph undigraph(
                    pgrouting::extract_vertices(edges, total_edges),
                    gType);
            undigraph.insert_edges(edges, total_edges);
            paths = pgr_astar(undigraph, combinations_vector, start_vids, end_vids,
                    heuristic, factor, epsilon, only_cost, normal);
        }
 
        size_t count(0);
        count = count_tuples(paths);
 
 
        if (count == 0) {
            (*return_tuples) = NULL;
            (*return_count) = 0;
            notice <<
                "No paths found\n";
            *log_msg = pgr_msg(notice.str().c_str());
            return;
        }
 
        (*return_tuples) = pgr_alloc(count, (*return_tuples));
        log << "Converting a set of paths into the tuples\n";
        (*return_count) = (collapse_paths(return_tuples, paths));
 
        *log_msg = log.str().empty()?
            *log_msg :
            pgr_msg(log.str().c_str());
        *notice_msg = notice.str().empty()?
            *notice_msg :
            pgr_msg(notice.str().c_str());
    } catch (AssertFailedException &except) {
        (*return_tuples) = pgr_free(*return_tuples);
        (*return_count) = 0;
        err << except.what();
        *err_msg = pgr_msg(err.str().c_str());
        *log_msg = pgr_msg(log.str().c_str());
    } catch (std::exception &except) {
        (*return_tuples) = pgr_free(*return_tuples);
        (*return_count) = 0;
        err << except.what();
        *err_msg = pgr_msg(err.str().c_str());
        *log_msg = pgr_msg(log.str().c_str());
    } catch(...) {
        (*return_tuples) = pgr_free(*return_tuples);
        (*return_count) = 0;
        err << "Caught unknown exception!";
        *err_msg = pgr_msg(err.str().c_str());
        *log_msg = pgr_msg(log.str().c_str());
    }
}

References collapse_paths(), count_tuples(), DIRECTED, pgrouting::extract_vertices(), pgrouting::graph::Pgr_base_graph< G, T_V, T_E >::insert_edges(), pgassert, pgr_alloc(), pgr_astar(), pgr_free(), pgr_msg(), UNDIRECTED, and AssertFailedException::what().

Referenced by process().

pgr_astar()

template<class G >

std::deque<Path> pgr_astar	(	G &	graph,
		std::vector< pgr_combination_t > &	combinations,
		std::vector< int64_t >	sources,
		std::vector< int64_t >	targets,
		int	heuristic,
		double	factor,
		double	epsilon,
		bool	only_cost,
		bool	normal
	)

Definition at line 46 of file astar_driver.cpp.

                     {
    std::sort(sources.begin(), sources.end());
    sources.erase(
            std::unique(sources.begin(), sources.end()),
            sources.end());
 
    std::sort(targets.begin(), targets.end());
    targets.erase(
            std::unique(targets.begin(), targets.end()),
            targets.end());
 
    pgrouting::algorithms::Pgr_astar< G > fn_astar;
    auto paths = combinations.empty() ?
        fn_astar.astar(graph, sources, targets, heuristic, factor, epsilon, only_cost)
        : fn_astar.astar(graph, combinations, heuristic, factor, epsilon, only_cost);
 
    if (!normal) {
        for (auto &path : paths) {
            path.reverse();
        }
    }
    return paths;
}

References pgrouting::algorithms::Pgr_astar< G >::astar(), and Path::reverse().

Referenced by do_pgr_astarManyToMany().