...one of the most highly
regarded and expertly designed C++ library projects in the
world.

— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards

Boost.Fusion adapted structs or classes are adapted to the Boost.Geometry point concept

Boost.Fusion adapted structs are (optionally) adapted to the Boost.Geometry point concept. They can therefore be used in many Boost.Geometry algorithms.

`#include <boost/geometry/geometries/adapted/boost_fusion.hpp>`

The standard header `boost/geometry.hpp`

does not include this header.

Shows how to combine Boost.Fusion with Boost.Geometry

#include <iostream> #include <boost/fusion/include/adapt_struct_named.hpp> #include <boost/geometry.hpp> #include <boost/geometry/geometries/adapted/boost_fusion.hpp> struct sample_point { double x, y, z; }; BOOST_FUSION_ADAPT_STRUCT(sample_point, (double, x) (double, y) (double, z)) BOOST_GEOMETRY_REGISTER_BOOST_FUSION_CS(cs::cartesian) int main() { sample_point a, b, c; // Set coordinates the Boost.Geometry way (one of the ways) boost::geometry::assign_values(a, 3, 2, 1); // Set coordinates the Boost.Fusion way boost::fusion::at_c<0>(b) = 6; boost::fusion::at_c<1>(b) = 5; boost::fusion::at_c<2>(b) = 4; // Set coordinates the native way c.x = 9; c.y = 8; c.z = 7; std::cout << "Distance a-b: " << boost::geometry::distance(a, b) << std::endl; std::cout << "Distance a-c: " << boost::geometry::distance(a, c) << std::endl; return 0; }

Output:

Distance a-b: 5.19615 Distance a-c: 10.3923