b15f8f68e4
Problem: - old solution was slow - depending on the result of TarjanSCC, new distance tables and new phantom node vectors were created to run tsp on it Solution: - dont create new distance tables and phantom node vectors - pass an additional vector with the information which locations are in the same component and ignore all others fix bug for scc split computation
67 lines
2.3 KiB
C++
67 lines
2.3 KiB
C++
/*
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Copyright (c) 2015, Project OSRM contributors
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef MATRIX_GRAPH_WRAPPER_H
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#define MATRIX_GRAPH_WRAPPER_H
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#include <vector>
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//This Wrapper provides all methods that are needed for TarjanSCC, when the graph is given in a
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//matrix representation (e.g. as output from a distance table call)
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template <typename T> class MatrixGraphWrapper {
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public:
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MatrixGraphWrapper(std::vector<T> table, const unsigned number_of_nodes) : table_(table), number_of_nodes_(number_of_nodes) {};
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unsigned GetNumberOfNodes() {
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return number_of_nodes_;
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}
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std::vector<unsigned> GetAdjacentEdgeRange(const unsigned node) const {
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std::vector<unsigned> edges;
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const auto maxint = std::numeric_limits<int>::max();
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for (auto i = 0; i < number_of_nodes_; ++i) {
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if (*(table_.begin() + node * number_of_nodes_ + i) != maxint) {
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edges.push_back(i);
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}
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}
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return edges;
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}
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unsigned GetTarget(const unsigned edge) {
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return edge;
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}
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private:
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std::vector<T> table_;
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const unsigned number_of_nodes_;
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};
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#endif // MATRIX_GRAPH_WRAPPER_H
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