78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
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/*
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* RenderItemMatcher.hpp
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*
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* Created on: Feb 16, 2009
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* Author: struktured
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*/
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#ifndef RenderItemMatcher_HPP
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#define RenderItemMatcher_HPP
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#include "RenderItemDistanceMetric.hpp"
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#include <vector>
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#include <map>
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#include <iostream>
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#include "HungarianMethod.hpp"
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typedef std::vector<std::pair<RenderItem*, RenderItem*> > RenderItemMatchList;
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class MatchResults;
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class RenderItemMatcher : public std::binary_function<RenderItemList, RenderItemList, MatchResults> {
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public:
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struct MatchResults {
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RenderItemMatchList matches;
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std::vector<RenderItem*> unmatchedLeft;
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std::vector<RenderItem*> unmatchedRight;
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double error;
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};
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static const std::size_t MAXIMUM_SET_SIZE = 1000;
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/// Computes an optimal matching between two renderable item sets.
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/// @param lhs the "left-hand side" list of render items.
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/// @param rhs the "right-hand side" list of render items.
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/// @returns a list of match pairs, possibly self referencing, and an error estimate of the matching.
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inline virtual void operator()(const RenderItemList & lhs, const RenderItemList & rhs) const {
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// Ensure the first argument is greater than next to aid the helper function's logic.
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if (lhs.size() >= rhs.size()) {
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_results.error = computeMatching(lhs, rhs);
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setMatches(lhs, rhs);
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} else {
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_results.error = computeMatching(rhs, lhs);
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setMatches(rhs, lhs);
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}
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}
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RenderItemMatcher() {}
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virtual ~RenderItemMatcher() {}
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inline MatchResults & matchResults() { return _results; }
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inline double weight(int i, int j) const { return _weights[i][j]; }
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MasterRenderItemDistance & distanceFunction() { return _distanceFunction; }
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private:
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mutable HungarianMethod<MAXIMUM_SET_SIZE> _hungarianMethod;
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mutable double _weights[MAXIMUM_SET_SIZE][MAXIMUM_SET_SIZE];
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mutable MatchResults _results;
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/// @idea interface this entirely allow overriding of its type.
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mutable MasterRenderItemDistance _distanceFunction;
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double computeMatching(const RenderItemList & lhs, const RenderItemList & rhs) const;
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void setMatches(const RenderItemList & lhs_src, const RenderItemList & rhs_src) const;
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};
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#endif
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