// This file is part of libigl, a simple c++ geometry processing library.
// 
// Copyright (C) 2016 Alec Jacobson <alecjacobson@gmail.com>
// 
// 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_ISMEMBER_H
#define IGL_ISMEMBER_H
#include "igl_inline.h"
#include <Eigen/Core>
namespace igl
{
  // Determine if elements of A exist in elements of B
  //
  // Inputs:
  //   A  ma by na matrix
  //   B  mb by nb matrix
  // Outputs:
  //   IA  ma by na matrix of flags whether corresponding element of A exists in
  //     B
  //   LOCB  ma by na matrix of indices in B locating matching element (-1 if
  //     not found), indices assume column major ordering
  //
  template <
    typename DerivedA,
    typename DerivedB,
    typename DerivedIA,
    typename DerivedLOCB>
  IGL_INLINE void ismember(
    const Eigen::PlainObjectBase<DerivedA> & A,
    const Eigen::PlainObjectBase<DerivedB> & B,
    Eigen::PlainObjectBase<DerivedIA> & IA,
    Eigen::PlainObjectBase<DerivedLOCB> & LOCB);
  template <
    typename DerivedA,
    typename DerivedB,
    typename DerivedIA,
    typename DerivedLOCB>
  IGL_INLINE void ismember_rows(
    const Eigen::PlainObjectBase<DerivedA> & A,
    const Eigen::PlainObjectBase<DerivedB> & B,
    Eigen::PlainObjectBase<DerivedIA> & IA,
    Eigen::PlainObjectBase<DerivedLOCB> & LOCB);

}

#ifndef IGL_STATIC_LIBRARY
#  include "ismember.cpp"
#endif
#endif

