| //===================================================== |
| // File : size_log.hh |
| // Author : L. Plagne <laurent.plagne@edf.fr)> |
| // Copyright (C) EDF R&D, lun sep 30 14:23:17 CEST 2002 |
| //===================================================== |
| // |
| // 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 2 |
| // 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, write to the Free Software |
| // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| // |
| #ifndef SIZE_LOG |
| #define SIZE_LOG |
| |
| #include "math.h" |
| // The Vector class must satisfy the following part of STL vector concept : |
| // resize() method |
| // [] operator for seting element |
| // the vector element are int compatible. |
| template<class Vector> |
| void size_log(const int nb_point, const int size_min, const int size_max, Vector & X) |
| { |
| X.resize(nb_point); |
| |
| float ls_min=log(float(size_min)); |
| float ls_max=log(float(size_max)); |
| |
| float ls=0.0; |
| |
| float delta_ls=(ls_max-ls_min)/(float(nb_point-1)); |
| |
| int size=0; |
| |
| for (int i=0;i<nb_point;i++){ |
| |
| ls = ls_min + float(i)*delta_ls ; |
| |
| size=int(exp(ls)); |
| |
| X[i]=size; |
| } |
| |
| } |
| |
| |
| #endif |