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#### model::polygon

The polygon contains an outer ring and zero or more inner rings.

###### Model of

Polygon Concept

###### Synopsis

    template<typename Point, bool ClockWise, bool Closed, template< typename, typename > class PointList, template< typename, typename > class RingList, template< typename > class PointAlloc, template< typename > class RingAlloc>
    class model::polygon
    {
      // ...
    };

###### Template parameter(s)

Parameter | Default | Description
--- | --- | ---
typename Point |  | point type
bool ClockWise | true | true for clockwise direction, false for CounterClockWise direction
bool Closed | true | true for closed polygons (last point == first point), false open points
template< typename, typename > class PointList | std::vector | container type for points, for example std::vector, std::list, std::deque
template< typename, typename > class RingList | std::vector | container type for inner rings, for example std::vector, std::list, std::deque
template< typename > class PointAlloc | std::allocator | container-allocator-type, for the points
template< typename > class RingAlloc | std::allocator | container-allocator-type, for the rings

###### Member Function(s)

Function | Description | Parameters | Returns
--- | --- | --- | ---

    ring_type const & outer()

    inner_container_type const & inners()

    ring_type & outer()

    inner_container_type & inners()

    void clear()

Utility method, clears outer and inner rings.

###### Header

Either

`#include <boost/geometry/geometries/geometries.hpp>`

Or

`#include <boost/geometry/geometries/polygon.hpp>`