How to use CGAL?

Question

Dear Sir/Madam,

            I would like to use CGAL, how can I do that?

Example:

#include <iostream>

#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>

#include <CGAL/convex_hull_2.h>

typedef CGAL::Exact_predicates_inexact_constructions_kernel K;

typedef K::Point_2 Point_2;

int main()

{

Point_2 points[5] = { Point_2(0,0), Point_2(10,0), Point_2(10,10), Point_2(6,5), Point_2(4,1) };

Point_2 result[5];

Point_2 *ptr = CGAL::convex_hull_2( points, points+5, result );

std::cout << ptr - result << " points on the convex hull:" << std::endl;

for(int i = 0; i < ptr - result; i++){

std::cout << result[i] << std::endl;

}

return 0;

}

Best regards,

Answer 1

Below is a simple example program I am trying to compile and run. The goal is to compute the convex hull of a set of 2D points using CGAL:

#include <iostream> #include <CGAL/Exact_predicates_inexact_constructions_kernel.h> #include <CGAL/convex_hull_2.h> typedef CGAL::Exact_predicates_inexact_constructions_kernel K; typedef K::Point_2 Point_2; int main() { Point_2 points[5] = { Point_2(0,0), Point_2(10,0), Point_2(10,10), Point_2(6,5), Point_2(4,1) }; Point_2 result[5]; Point_2* ptr = CGAL::convex_hull_2(points, points + 5, result); std::cout << ptr - result << " points on the convex hull:" << std::endl; for (int i = 0; i < ptr - result; i++) { std::cout << result[i] << std::endl; } return 0; }