[/============================================================================
  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:de9im_matrix de9im::matrix]

'''<indexterm><primary>de9im</primary></indexterm><indexterm><primary>matrix</primary></indexterm>'''
DE-9IM model intersection matrix. 

[heading Description]
This matrix can be used to express spatial relations as defined in Dimensionally Extended 9-Intersection Model.

[heading Synopsis]
``class de9im::matrix
      : public detail::relate::matrix< 3, 3 >
{
  // ...
};
``

[heading Constructor(s)]
[table
[[Function] [Description] [Parameters] ]
[[``matrix()``

] [Initializes all of the matrix elements to F. ] [

]]
]

[heading Member Function(s)]
[table
[[Function] [Description] [Parameters]  [Returns]]
[[``char operator[](std::size_t index)``

] [Subscript operator. ] [[* std::size_t]: ['index]:  The index of the element 



][
The element 

]
]
[[``const_iterator begin()``

] [Returns the iterator to the first element. ] [

][
const RandomAccessIterator 

]
]
[[``const_iterator end()``

] [Returns the iterator past the last element. ] [

][
const RandomAccessIterator 

]
]
[[``std::size_t size()``

] [Returns the number of elements. ] [

][
9 

]
]
[[``const char * data()``

] [Returns raw pointer to elements. ] [

][
const pointer to array of elements 

]
]
[[``std::string str()``

] [Returns std::string containing elements. ] [

][
string containing elements 

]
]
]

[heading Header]
`#include <boost/geometry/algorithms/detail/relate/de9im.hpp>`

[heading See also]
* [link geometry.reference.algorithms.relation relation]

[endsect]