CGAL::orientation_2
Definition
The function orientation_2 computes if a polygon is clockwise or counterclockwise
oriented.
#include <CGAL/Polygon_2_algorithms.h>
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template <class ForwardIterator, class Traits>
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Orientation
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orientation_2 ( ForwardIterator first, ForwardIterator last, Traits traits)
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Precondition
is_simple_2(first, last, traits);
Requirements
- Traits is a model of the concept
PolygonTraits_2
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Only the following members of this traits class are used:
- Less_xy_2
- less_xy_2_object
- orientation_2_object
- ForwardIterator::value_type should be Traits::Point_2,
See Also
PolygonTraits_2
CGAL::is_simple_2
CGAL::Polygon_2<PolygonTraits_2, Container>
CGAL::Orientation
