1 | #include <boost/geometry.hpp>
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2 | #include <boost/geometry/geometries/geometries.hpp>
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3 | #include <boost/geometry/multi/geometries/multi_point.hpp>
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4 |
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5 | #define ADD(X,Y) append(all_points_in_radius,make<point_xy<float> >(X,Y))
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6 |
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7 | double convex_hull_area()
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8 | {
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9 | using boost::geometry::model::d2::point_xy;
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10 | using boost::geometry::append;
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11 | using boost::geometry::make;
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12 |
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13 | boost::geometry::model::polygon<point_xy<float> > all_points_in_radius;
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14 |
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15 | ADD(0,53);
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16 | ADD(0,103); // point is on hull
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17 | ADD(0,53);
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18 | ADD(0,3);
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19 | ADD(0,3);
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20 | ADD(0,0); // point is on hull
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21 | ADD(1,0);
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22 | ADD(1,1);
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23 | ADD(2,1);
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24 | ADD(2,0);
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25 | ADD(2,0);
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26 | ADD(2,0);
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27 | ADD(3,0);
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28 | ADD(3,1);
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29 | ADD(4,1);
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30 | ADD(4,0);
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31 | ADD(5,0);
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32 | ADD(0,3);
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33 | ADD(10,3);
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34 | ADD(10,2);
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35 | ADD(10,2);
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36 | ADD(10,2);
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37 | ADD(5,2);
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38 | ADD(5,0);
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39 | ADD(5,0);
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40 | ADD(55,0);
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41 | ADD(105,0); // point is on hull
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42 |
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43 | boost::geometry::model::polygon<point_xy<float> > hull;
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44 | boost::geometry::convex_hull(all_points_in_radius,hull);
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45 | return boost::geometry::area(hull);
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46 | }
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47 |
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48 | int main()
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49 | {
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50 | std::cout << "This should give 1407.5:" << std::endl;
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51 | std::cout << convex_hull_area() << std::endl;
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52 | return 0;
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53 | }
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54 |
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