Generator/random_points_triangle_2.cpp

#include <iostream>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/point_generators_2.h>
#include <CGAL/Random.h>

typedef CGAL::Exact_predicates_inexact_constructions_kernel         K;
typedef K::Point_2                                                  Point_2;
typedef K::Triangle_2                                               Triangle_2;
typedef std::vector<Point_2>                                        Container;
typedef CGAL::Random_points_in_triangle_2<Point_2>                  Point_generator;

int main() {
    std::cout << "Creating 100 random points in a triangle in 2D." << std::endl;
    
    // The input triangle is as follows
    Triangle_2 tri(Point_2(0,0),Point_2(1,0),Point_2(0,1));
    
    // generated points are in that container
    Container points;
    
    // creating the generator, input is the Triangle_2 tri
    Point_generator g(tri);
    
    // get 100 random points in tri
    std::copy_n(g, 100, std::back_inserter(points));
    
    // Check that we have really created 100 points.
    assert( points.size() == 100);
    
    // print the first point that was generated
    std::cout << points[0] << std::endl;
    
    return 0;
}