CGAL::polygon_area_2
Definition
The function polygon_area_2 computes the signed area of a polygon.
#include <CGAL/Polygon_2_algorithms.h>
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template <class ForwardIterator, class Traits>
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typename Traits::FT
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polygon_area_2 ( ForwardIterator first, ForwardIterator last, Traits traits)
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Computes the signed area of the polygon defined by the range of points
first … last.
The sign is positive for counterclockwise polygons, negative for
clockwise polygons. If the polygon is not simple, the area is not well defined.
Requirements
- Traits is a model of the concept
PolygonTraits_2
.
Only the following members of this traits class are used:
- Compute_area_2 : Computes the signed area of the
oriented triangle defined by 3 Point_2 passed as arguments.
- FT
- compute_area_2_object
- ForwardIterator::value_type should be Traits::Point_2,
See Also
PolygonTraits_2
CGAL::orientation_2
CGAL::Polygon_2<PolygonTraits_2, Container>
