#ifndef IGL_COPYLEFT_CGAL_SEGMENT_SEGMENT_SQUARED_DISTANCE_H
#define IGL_COPYLEFT_CGAL_SEGMENT_SEGMENT_SQUARED_DISTANCE_H
#include <igl/igl_inline.h>
#include <CGAL/Segment_3.h>
#include <CGAL/Point_3.h>
namespace igl
{
  namespace copyleft
  {
    namespace cgal
    {
      // Given two segments S1 and S2 find the points on each of closest
      // approach and the squared distance thereof.
      // 
      // Inputs:
      //   S1  first segment
      //   S2  second segment
      // Outputs:
      //   P1  point on S1 closest to S2
      //   P2  point on S2 closest to S1
      //   d  distance betwee P1 and S2
      // Returns true if the closest approach is unique.
      template < typename Kernel>
      IGL_INLINE bool segment_segment_squared_distance(
          const CGAL::Segment_3<Kernel> & S1,
          const CGAL::Segment_3<Kernel> & S2,
          CGAL::Point_3<Kernel> & P1,
          CGAL::Point_3<Kernel> & P2,
          typename Kernel::FT & d
          );

    }
  }
}
#ifndef IGL_STATIC_LIBRARY
#  include "segment_segment_squared_distance.cpp"
#endif

#endif