Boost C++ Libraries

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touches (two geometries)

Checks if two geometries have at least one touching point (tangent - non overlapping)

Synopsis

template<typename Geometry1, typename Geometry2>
bool touches(Geometry1 const & geometry1, Geometry2 const & geometry2)

Parameters

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

Returns

Returns true if two geometries touch each other

Header

Either

#include <boost/geometry/geometry.hpp>

Or

#include <boost/geometry/algorithms/touches.hpp>

Conformance

The function touches implements function Touches from the OGC Simple Feature Specification.

The version with one parameter is additional and not described in the OGC standard

[Note] Note

only implemented for polygon/multi_polygon


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