CGAL::Is_y_monotone_2<Traits>

Definition

Function object class that tests whether a sequence of points represents a $$y-monotone polygon or not.

#include <CGAL/polygon_function_objects.h>

Is Model for the Concepts

PolygonIsValid

Creation

Is_y_monotone_2<Traits> f ( Traits t);
	Traits is a model of the concept IsYMonotoneTraits_2

Operations

template<class InputIterator>
bool	f ( InputIterator first, InputIterator beyond)
		returns true iff the points of type Traits::Point_2 in the range [first,beyond) define a $$y-monotone polygon.

See Also

CGAL::convex_partition_is_valid_2
CGAL::Partition_is_valid_traits_2<Traits, PolygonIsValid>

Implementation

This test requires $$O(n) time for a polygon with $$n vertices.