// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2017 Oded Stein <oded.stein@columbia.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_ISOLINES_H
#define IGL_ISOLINES_H
#include "igl_inline.h"

#include <Eigen/Dense>
#include <Eigen/Sparse>


namespace igl
{
  /// Constructs isolines for a function z given on a mesh (V,F)
  ///
  /// @param[in] V  #V by dim list of mesh vertex positions
  /// @param[in] F  #F by 3 list of mesh faces (must be triangles)
  /// @param[in] z  #V by 1 list of function values evaluated at vertices
  /// @param[in] n  the number of desired isolines
  /// @param[out] isoV  #isoV by dim list of isoline vertex positions
  /// @param[out] isoE  #isoE by 2 list of isoline edge positions
  ///
  template <typename DerivedV,
  typename DerivedF,
  typename DerivedZ,
  typename DerivedIsoV,
  typename DerivedIsoE>
  IGL_INLINE void isolines(
    const Eigen::MatrixBase<DerivedV>& V,
    const Eigen::MatrixBase<DerivedF>& F,
    const Eigen::MatrixBase<DerivedZ>& z,
    const int n,
    Eigen::PlainObjectBase<DerivedIsoV>& isoV,
    Eigen::PlainObjectBase<DerivedIsoE>& isoE);
}

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

#endif