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55 lines
1.6 KiB
55 lines
1.6 KiB
2 years ago
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//=====================================================
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// File : size_log.hh
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// Author : L. Plagne <laurent.plagne@edf.fr)>
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// Copyright (C) EDF R&D, lun sep 30 14:23:17 CEST 2002
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//=====================================================
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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#ifndef SIZE_LOG
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#define SIZE_LOG
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#include "math.h"
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// The Vector class must satisfy the following part of STL vector concept :
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// resize() method
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// [] operator for setting element
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// the vector element are int compatible.
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template<class Vector>
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void size_log(const int nb_point, const int size_min, const int size_max, Vector & X)
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{
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X.resize(nb_point);
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float ls_min=log(float(size_min));
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float ls_max=log(float(size_max));
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float ls=0.0;
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float delta_ls=(ls_max-ls_min)/(float(nb_point-1));
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int size=0;
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for (int i=0;i<nb_point;i++){
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ls = ls_min + float(i)*delta_ls ;
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size=int(exp(ls));
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X[i]=size;
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}
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}
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#endif
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