#ifndef IGL_GRID_SEARCH_H
#define IGL_GRID_SEARCH_H
#include "igl_inline.h"
#include <Eigen/Core>
#include <functional>
namespace igl
{
  // Solve the problem:
  //
  //   minimize f(x)
  //   subject to lb ≤ x ≤ ub 
  // 
  // by exhaustive grid search.
  //
  // Inputs:
  //   f  function to minimize
  //   LB  #X vector of finite lower bounds
  //   UB  #X vector of finite upper bounds
  //   I  #X vector of number of steps for each variable
  // Outputs:
  //   X  #X optimal parameter vector
  // Returns f(X)
  //
  template <
    typename Scalar, 
    typename DerivedX, 
    typename DerivedLB, 
    typename DerivedUB, 
    typename DerivedI>
  IGL_INLINE Scalar grid_search(
    const std::function< Scalar (DerivedX &) > f,
    const Eigen::MatrixBase<DerivedLB> & LB,
    const Eigen::MatrixBase<DerivedUB> & UB,
    const Eigen::MatrixBase<DerivedI> & I,
    DerivedX & X);
}

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

#endif