Mercurial > fem-fenics-eugenio
view src/expression.h @ 213:d4eef566511b
Extend feval function to support also passing the coordinates separately
as multiple arguments and evaluating the function at multiple
points at once. Author: Daniel Kraft
author | gedeone-octave <marcovass89@hotmail.it> |
---|---|
date | Tue, 04 Mar 2014 12:19:04 +0000 |
parents | 9e944b0d0fc8 |
children |
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/* Copyright (C) 2013 Marco Vassallo <gedeone-octave@users.sourceforge.net> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _EXPRESSION_OCTAVE_ #define _EXPRESSION_OCTAVE_ #include <dolfin.h> #include <octave/oct.h> #include <octave/oct-map.h> #include <octave/ov-fcn-handle.h> #include <octave/ov-fcn.h> #include <octave/parse.h> #include <octave/octave.h> class expression : public dolfin::Expression { public: expression() : dolfin::Expression() {} expression (octave_fcn_handle & _f) : dolfin::Expression (), f (new octave_fcn_handle (_f)) {} expression (octave_fcn_handle & _f, std::size_t _n) : dolfin::Expression (_n), f (new octave_fcn_handle (_f)) {} ~expression (void) { delete f; } void eval (dolfin::Array<double>& values, const dolfin::Array<double>& x) const { octave_value_list b; b.resize (x.size ()); for (std::size_t i = 0; i < x.size (); ++i) b(i) = x[i]; octave_value_list tmp = feval (f->function_value (), b); Array<double> res = tmp(0).array_value (); for (std::size_t i = 0; i < values.size (); ++i) values[i] = res(i); } private: octave_fcn_handle * f; }; #endif