[/============================================================================
  Boost.Geometry (aka GGL, Generic Geometry Library)

  Copyright (c) 2007-2013 Barend Gehrels, Amsterdam, the Netherlands.
  Copyright (c) 2008-2013 Bruno Lalande, Paris, France.
  Copyright (c) 2009-2013 Mateusz Loskot, London, UK.

  Use, modification and distribution is subject to the Boost Software License,
  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  http://www.boost.org/LICENSE_1_0.txt)
=============================================================================/]


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[section:num_points num_points]

'''<indexterm><primary>num_points</primary></indexterm>'''
Calculates the number of points of a geometry. 

[heading Description]
The free function num\u005fpoints calculates the number of points of a geometry. 

[heading Synopsis]
``template<typename Geometry>
std::size_t num_points(Geometry const & geometry, bool add_for_open = false)``

[heading Parameters]

[table
[[Type] [Concept] [Name] [Description] ]
[[Geometry const &] [Any type fulfilling a Geometry Concept ] [geometry] [A model of the specified concept ]]
[[bool] [] [add_for_open] [add one for open geometries (i.e. polygon types which are not closed) ]]
]


[heading Returns]
The calculated number of points

[heading Header]
Either

`#include <boost/geometry.hpp>`


Or

`#include <boost/geometry/algorithms/num_points.hpp>`

[include reference/algorithms/num_points.qbk]


[endsect]

