...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Metafunction defining value as the number of coordinates (the number of axes of any geometry) of the point type making up the specified geometry type.
template<typename Geometry> struct dimension : public core_dispatch::dimension< tag< Geometry >::type, util::remove_cptrref< Geometry >::type > { // ... };
Parameter |
Description |
---|---|
typename Geometry |
Any type fulfilling a Geometry Concept |
Either
#include <boost/geometry.hpp>
Or
#include <boost/geometry/core/coordinate_dimension.hpp>
Compile time
Examine the number of coordinates making up the points in a linestring type
#include <iostream> #include <boost/geometry.hpp> #include <boost/geometry/geometries/linestring.hpp> #include <boost/geometry/geometries/adapted/boost_tuple.hpp> BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian); int main() { int dim = boost::geometry::dimension < boost::geometry::model::linestring < boost::tuple<float, float, float> > >::value; std::cout << "dimensions: " << dim << std::endl; return 0; }
Output:
dimensions: 3