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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 Concept

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.

Next: approx_convex_partition_2
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The CGAL Project . Tue, December 21, 2004 .