Method evaluate_objective_gradient

interfaces/AMPL/AMPLModel.cpp:145–155

dense gradient

   // dense gradient
   void AMPLModel::evaluate_objective_gradient(const Vector<double>& x, Vector<double>& gradient) const {
      fint error_flag = 0;
      this->asl->p.Objgrd(this->asl, 0, const_cast<double*>(x.data()), gradient.data(), &error_flag);
      if (0 < error_flag) {
         throw GradientEvaluationError();
      }
      if (this->optimization_sense != 1.) {
         gradient.scale(this->optimization_sense);
      }
      ++this->number_model_evaluations.objective_gradient;
   }

   void AMPLModel::compute_jacobian_sparsity(uno_int* row_indices, uno_int* column_indices, uno_int row_offset,
         uno_int column_offset, uno_int solver_indexing, MatrixOrder matrix_order) const {