[/============================================================================
  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:difference_4_with_strategy difference (with strategy)]

'''<indexterm><primary>difference</primary></indexterm>'''


[heading Description]
Calculate the difference of two geometries

The free function difference calculates the spatial set theoretic difference of two geometries. 

[heading Synopsis]
``template<typename Geometry1, typename Geometry2, typename Collection, typename Strategy>
void difference(Geometry1 const & geometry1, Geometry2 const & geometry2, Collection & output_collection,
                Strategy const & strategy)``

[heading Parameters]

[table
[[Type] [Concept] [Name] [Description] ]
[[Geometry1 const &] [Any type fulfilling a Geometry Concept ] [geometry1] [A model of the specified concept ]]
[[Geometry2 const &] [Any type fulfilling a Geometry Concept ] [geometry2] [A model of the specified concept ]]
[[Collection &] [output collection, either a multi-geometry, or a std::vector<Geometry> / std::deque<Geometry> etc ] [output_collection] [the output collection ]]
[[Strategy const &] [Any type fulfilling a Difference Strategy Concept ] [strategy] [The strategy which will be used for difference calculations]]
]


[heading Header]
Either

`#include <boost/geometry.hpp>`


Or

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

[include reference/algorithms/difference.qbk]


[endsect]

[section:difference_3 difference]

'''<indexterm><primary>difference</primary></indexterm>'''


[heading Description]
Calculate the difference of two geometries

The free function difference calculates the spatial set theoretic difference of two geometries. 

[heading Synopsis]
``template<typename Geometry1, typename Geometry2, typename Collection>
void difference(Geometry1 const & geometry1, Geometry2 const & geometry2, Collection & output_collection)``

[heading Parameters]

[table
[[Type] [Concept] [Name] [Description] ]
[[Geometry1 const &] [Any type fulfilling a Geometry Concept ] [geometry1] [A model of the specified concept ]]
[[Geometry2 const &] [Any type fulfilling a Geometry Concept ] [geometry2] [A model of the specified concept ]]
[[Collection &] [output collection, either a multi-geometry, or a std::vector<Geometry> / std::deque<Geometry> etc ] [output_collection] [the output collection]]
]


[heading Header]
Either

`#include <boost/geometry.hpp>`


Or

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

[include reference/algorithms/difference.qbk]


[endsect]