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## CGAL::Is_convex_2<Traits>

### Definition

Function object class for testing if a sequence of points represents a convex polygon or not.

#include <CGAL/polygon_function_objects.h>

### Is Model for the Concept

PolygonIsValid

### Creation

Is_convex_2<Traits> f ( Traits t);
| Traits satisfies the requriements of the function is_convex_2

### Operations

template<class InputIterator>
bool | f ( InputIterator first, InputIterator beyond)
|  | returns true iff the points of type Triats::Point_2 in the range [first,beyond) define a convex 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: Is_vacuously_valid<Traits>

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The CGAL Project . Tue, December 21, 2004 .