| 1 | #include <boost/geometry.hpp>
|
|---|
| 2 | #include <boost/geometry/geometries/geometries.hpp>
|
|---|
| 3 | #include <boost/geometry/multi/geometries/multi_point.hpp>
|
|---|
| 4 |
|
|---|
| 5 | #define ADD(X,Y) append(poly,make<point_xy<double> >(X,Y))
|
|---|
| 6 |
|
|---|
| 7 | double poly_area()
|
|---|
| 8 | {
|
|---|
| 9 | using boost::geometry::model::d2::point_xy;
|
|---|
| 10 | using boost::geometry::append;
|
|---|
| 11 | using boost::geometry::make;
|
|---|
| 12 |
|
|---|
| 13 | boost::geometry::model::polygon<point_xy<float> > poly;
|
|---|
| 14 |
|
|---|
| 15 | ADD(0.,0.);
|
|---|
| 16 | ADD(1.,0.);
|
|---|
| 17 | ADD(0.,1.);
|
|---|
| 18 | ADD(0.,0.);
|
|---|
| 19 |
|
|---|
| 20 | return boost::geometry::area(poly);
|
|---|
| 21 | }
|
|---|
| 22 |
|
|---|
| 23 | int main()
|
|---|
| 24 | {
|
|---|
| 25 | std::cout << poly_area() << std::endl;
|
|---|
| 26 | return 0;
|
|---|
| 27 | }
|
|---|
| 28 |
|
|---|