// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2019 Hanxiao Shen <hanxiao@cs.nyu.edu>
//
// This Source Code Form is subject to the terms of the Mozilla Public License
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
// obtain one at http://mozilla.org/MPL/2.0/.

#ifndef IGL_PREDICATES_SEGMENT_SEGMENT_INTERSECT_H
#define IGL_PREDICATES_SEGMENT_SEGMENT_INTERSECT_H

#include <igl/igl_inline.h>
#include <Eigen/Core>
#include "predicates.h"
namespace igl
{
  namespace predicates
  {
  
    // Given two segments in 2d test whether they intersect each other
    // using predicates orient2d
    // 
    // Inputs:
    //   A:   1st endpoint of segment 1
    //   B:   2st endpoint of segment 1
    //   C:   1st endpoint of segment 2
    //   D:   2st endpoint of segment 2
    // Returns true if they intersect
    
    template <typename DerivedP>
    IGL_INLINE bool segment_segment_intersect(
      // input:
      const Eigen::MatrixBase<DerivedP>& A,
      const Eigen::MatrixBase<DerivedP>& B,
      const Eigen::MatrixBase<DerivedP>& C,
      const Eigen::MatrixBase<DerivedP>& D
    );

  }
}
#ifndef IGL_STATIC_LIBRARY
#   include "segment_segment_intersect.cpp"
#endif
#endif //IGL_PREDICATES_SEGMENT_SEGMENT_INTERSECT_H