CGAL 6.1.1 - 2D and 3D Linear Geometry Kernel

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Kernel_23/surprising.cpp
#include <iostream>
#include <CGAL/Simple_cartesian.h>
typedef CGAL::Simple_cartesian<double> Kernel;
typedef Kernel::Point_2 Point_2;
int main()
{
{
Point_2 p(0, 0.3), q(1, 0.6), r(2, 0.9);
std::cout << (CGAL::collinear(p,q,r) ? "collinear\n" : "not collinear\n");
}
{
Point_2 p(0, 1.0/3.0), q(1, 2.0/3.0), r(2, 1);
std::cout << (CGAL::collinear(p,q,r) ? "collinear\n" : "not collinear\n");
}
{
Point_2 p(0,0), q(1, 1), r(2, 2);
std::cout << (CGAL::collinear(p,q,r) ? "collinear\n" : "not collinear\n");
}
return 0;
}
Kernel::Point_2
A type representing points in two dimensions.
Definition: GeomObjects.h:414
CGAL::collinear
bool collinear(const CGAL::Point_2< Kernel > &p, const CGAL::Point_2< Kernel > &q, const CGAL::Point_2< Kernel > &r)
returns true, iff p, q, and r are collinear.
Kernel
Definition: FunctionObjectConcepts.h:2
CGAL::Simple_cartesian
A model for a Kernel using Cartesian coordinates to represent the geometric objects.
Definition: Simple_cartesian.h:31