![]() |
![]() |
Classes | |
struct | boost::geometry::default_length_result< Geometry > |
Meta-function defining return type of length function. More... | |
Functions | |
template<typename Geometry > | |
default_length_result < Geometry >::type | boost::geometry::length (Geometry const &geometry) |
Calculates the length of a geometry. More... | |
template<typename Geometry , typename Strategy > | |
default_length_result < Geometry >::type | boost::geometry::length (Geometry const &geometry, Strategy const &strategy) |
Calculates the length of a geometry using the specified strategy. More... | |
default_length_result<Geometry>::type boost::geometry::length | ( | Geometry const & | geometry | ) |
Calculates the length of a geometry.
The free function length calculates the length (the sum of distances between consecutive points) of a geometry. It uses the default strategy, based on the coordinate system of the geometry.
Geometry | Any type fulfilling a Geometry Concept |
geometry | A model of the specified concept |
default_length_result<Geometry>::type boost::geometry::length | ( | Geometry const & | geometry, |
Strategy const & | strategy | ||
) |
Calculates the length of a geometry using the specified strategy.
The free function length calculates the length (the sum of distances between consecutive points) of a geometry using the specified strategy. Reasons to specify a strategy include: use another coordinate system for calculations; construct the strategy beforehand (e.g. with the radius of the Earth); select a strategy when there are more than one available for a calculation.
Geometry | Any type fulfilling a Geometry Concept |
Strategy | Any type fulfilling a distance Strategy Concept |
geometry | A model of the specified concept |
strategy | The strategy which will be used for distance calculations |
April 2, 2011 |
Copyright © 2007-2011 Barend Gehrels, Amsterdam, the Netherlands Copyright © 2008-2011 Bruno Lalande, Paris, France Copyright © 2009-2010 Mateusz Loskot, London, UK |