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(poly,make<point_xy<double> >(X,Y))
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6 |
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7 | double poly_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> > poly;
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14 |
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15 | ADD(0.,0.);
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16 | ADD(1.,0.);
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17 | ADD(0.,1.);
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18 | ADD(0.,0.);
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19 |
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20 | return boost::geometry::area(poly);
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21 | }
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22 |
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23 | int main()
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24 | {
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25 | std::cout << poly_area() << std::endl;
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26 | return 0;
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27 | }
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28 |
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