#ifndef IGL_COPYLEFT_OFFSET_SURFACE_H
#define IGL_COPYLEFT_OFFSET_SURFACE_H
#include "../igl_inline.h"
#include "../signed_distance.h"
#include <Eigen/Core>

namespace igl
{
  namespace copyleft
  {
    // Compute a triangulated offset surface using matching cubes on a grid of
    // signed distance values from the input triangle mesh.
    //
    // Inputs:
    //   V  #V by 3 list of mesh vertex positions
    //   F  #F by 3 list of mesh triangle indices into V
    //   isolevel  iso level to extract (signed distance: negative inside)
    //   s  number of grid cells along longest side (controls resolution)
    //   signed_distance_type  type of signing to use (see
    //     ../signed_distance.h)
    // Outputs:
    //   SV  #SV by 3 list of output surface mesh vertex positions
    //   SF  #SF by 3 list of output mesh triangle indices into SV
    //   GV  #GV=side(0)*side(1)*side(2) by 3 list of grid cell centers
    //   side  list of number of grid cells in x, y, and z directions
    //   S  #GV by 3 list of signed distance values _near_ `isolevel` ("far"
    //     from `isolevel` these values are incorrect)
    //
    template <
      typename DerivedV,
      typename DerivedF,
      typename isolevelType,
      typename DerivedSV,
      typename DerivedSF,
      typename DerivedGV,
      typename Derivedside,
      typename DerivedS>
    void offset_surface(
      const Eigen::MatrixBase<DerivedV> & V,
      const Eigen::MatrixBase<DerivedF> & F,
      const isolevelType isolevel,
      const typename Derivedside::Scalar s,
      const SignedDistanceType & signed_distance_type,
      Eigen::PlainObjectBase<DerivedSV> & SV,
      Eigen::PlainObjectBase<DerivedSF> & SF,
      Eigen::PlainObjectBase<DerivedGV> & GV,
      Eigen::PlainObjectBase<Derivedside> & side,
      Eigen::PlainObjectBase<DerivedS> & S);
  }
}
#ifndef IGL_STATIC_LIBRARY
#  include "offset_surface.cpp"
#endif 
#endif