\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)
CGAL 4.3 - 2D Polygon Partitioning
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CGAL::Is_y_monotone_2< Traits > Class Template Reference
Function Object Classes

#include <CGAL/polygon_function_objects.h>

Definition

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

Is Model Of:
PolygonIsValid
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.

Creation

 Is_y_monotone_2 (const Traits &t)
 Traits is a model of the concept IsYMonotoneTraits_2
 

Operations

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