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107 lines
2.7 KiB
C++
107 lines
2.7 KiB
C++
#include <opencv2/opencv.hpp>
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using namespace cv;
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class TravelSalesman
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{
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private :
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const std::vector<Point>& posCity;
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std::vector<int>& next;
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RNG rng;
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int d0,d1,d2,d3;
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public:
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TravelSalesman(std::vector<Point> &p, std::vector<int> &n) :
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posCity(p), next(n)
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{
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rng = theRNG();
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}
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/** Give energy value for a state of system.*/
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double energy() const;
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/** Function which change the state of system (random perturbation).*/
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void changeState();
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/** Function to reverse to the previous state.*/
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void reverseState();
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};
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void TravelSalesman::changeState()
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{
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d0 = rng.uniform(0,static_cast<int>(posCity.size()));
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d1 = next[d0];
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d2 = next[d1];
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d3 = next[d2];
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next[d0] = d2;
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next[d2] = d1;
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next[d1] = d3;
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}
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void TravelSalesman::reverseState()
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{
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next[d0] = d1;
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next[d1] = d2;
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next[d2] = d3;
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}
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double TravelSalesman::energy() const
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{
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double e = 0;
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for (size_t i = 0; i < next.size(); i++)
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{
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e += norm(posCity[i]-posCity[next[i]]);
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}
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return e;
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}
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static void DrawTravelMap(Mat &img, std::vector<Point> &p, std::vector<int> &n)
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{
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for (size_t i = 0; i < n.size(); i++)
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{
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circle(img,p[i],5,Scalar(0,0,255),2);
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line(img,p[i],p[n[i]],Scalar(0,255,0),2);
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}
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}
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int main(void)
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{
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int nbCity=40;
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Mat img(500,500,CV_8UC3,Scalar::all(0));
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RNG rng(123456);
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int radius=static_cast<int>(img.cols*0.45);
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Point center(img.cols/2,img.rows/2);
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std::vector<Point> posCity(nbCity);
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std::vector<int> next(nbCity);
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for (size_t i = 0; i < posCity.size(); i++)
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{
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double theta = rng.uniform(0., 2 * CV_PI);
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posCity[i].x = static_cast<int>(radius*cos(theta)) + center.x;
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posCity[i].y = static_cast<int>(radius*sin(theta)) + center.y;
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next[i]=(i+1)%nbCity;
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}
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TravelSalesman ts_system(posCity, next);
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DrawTravelMap(img,posCity,next);
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imshow("Map",img);
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waitKey(10);
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double currentTemperature = 100.0;
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for (int i = 0, zeroChanges = 0; zeroChanges < 10; i++)
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{
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int changesApplied = ml::simulatedAnnealingSolver(ts_system, currentTemperature, currentTemperature*0.97, 0.99, 10000*nbCity, ¤tTemperature, rng);
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img.setTo(Scalar::all(0));
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DrawTravelMap(img, posCity, next);
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imshow("Map", img);
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int k = waitKey(10);
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std::cout << "i=" << i << " changesApplied=" << changesApplied << " temp=" << currentTemperature << " result=" << ts_system.energy() << std::endl;
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if (k == 27 || k == 'q' || k == 'Q')
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return 0;
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if (changesApplied == 0)
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zeroChanges++;
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}
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std::cout << "Done" << std::endl;
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waitKey(0);
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return 0;
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}
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