boost::geometry::strategy::buffer::distance_symmetric< NumericType > Class Template Reference

Let the buffer algorithm create buffers with same distances. More...

#include <buffer_distance_symmetric.hpp>

Public Member Functions
	distance_symmetric (NumericType const &distance)
	Constructs the strategy, a distance must be specified. More...
template<typename Point >
NumericType	apply (Point const &, Point const &, buffer_side_selector) const
	Returns the distance-value. More...
int	factor () const
	Used internally, returns -1 for deflate, 1 for inflate. More...
bool	negative () const
	Returns true if distance is negative. More...
template<typename JoinStrategy , typename EndStrategy >
NumericType	max_distance (JoinStrategy const &join_strategy, EndStrategy const &end_strategy) const
	Returns the max distance distance up to the buffer will reach. More...
NumericType	simplify_distance () const
	Returns the distance at which the input is simplified before the buffer process. More...

Detailed Description

template<typename NumericType>
class boost::geometry::strategy::buffer::distance_symmetric< NumericType >

Let the buffer algorithm create buffers with same distances.

Template Parameters

NumericType

This strategy can be used as DistanceStrategy for the buffer algorithm. It can be applied for all geometries. It uses one distance for left and for right. If the distance is negative and used with a (multi)polygon or ring, the geometry will shrink (deflate) instead of expand (inflate).

{ [heading Example] [buffer_distance_symmetric] [heading Output] [$img/strategies/buffer_distance_symmetric.png] [heading See also]

• [link geometry.reference.algorithms.buffer.buffer_7_with_strategies buffer (with strategies)]
• [link geometry.reference.strategies.strategy_buffer_distance_asymmetric distance_asymmetric] }

Constructor & Destructor Documentation

template<typename NumericType >

boost::geometry::strategy::buffer::distance_symmetric< NumericType >::distance_symmetric ( NumericType const &  distance )

inlineexplicit

Constructs the strategy, a distance must be specified.

Parameters

distance

The distance (or radius) of the buffer

Member Function Documentation

template<typename NumericType >

template<typename Point >

NumericType boost::geometry::strategy::buffer::distance_symmetric< NumericType >::apply ( Point const &  , Point const &  , buffer_side_selector    ) const

inline

Returns the distance-value.

References boost::geometry::math::abs(), and boost::geometry::strategy::buffer::distance_symmetric< NumericType >::negative().

template<typename NumericType >

int boost::geometry::strategy::buffer::distance_symmetric< NumericType >::factor ( ) const

inline

Used internally, returns -1 for deflate, 1 for inflate.

References boost::geometry::strategy::buffer::distance_symmetric< NumericType >::negative().

template<typename NumericType >

template<typename JoinStrategy , typename EndStrategy >

NumericType boost::geometry::strategy::buffer::distance_symmetric< NumericType >::max_distance ( JoinStrategy const &  join_strategy, EndStrategy const &  end_strategy  ) const

inline

Returns the max distance distance up to the buffer will reach.

References boost::geometry::math::abs(), and boost::accumulators::extract::max.

template<typename NumericType >

bool boost::geometry::strategy::buffer::distance_symmetric< NumericType >::negative ( ) const

inline

Returns true if distance is negative.

Referenced by boost::geometry::strategy::buffer::distance_symmetric< NumericType >::apply(), and boost::geometry::strategy::buffer::distance_symmetric< NumericType >::factor().

template<typename NumericType >

NumericType boost::geometry::strategy::buffer::distance_symmetric< NumericType >::simplify_distance ( ) const

inline

Returns the distance at which the input is simplified before the buffer process.

References boost::geometry::math::abs().

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The documentation for this class was generated from the following file:

• boost_1_57_0/boost/geometry/strategies/agnostic/buffer_distance_symmetric.hpp