comparison: src/analog/functions.cpp
src/analog/functions.cpp
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| 1 /*************************************************************************** | |
| 2 * Copyright (C) 2006-2008 by Tomasz Ziobrowski * | |
| 3 * http://www.3electrons.com * | |
| 4 * e-mail: t.ziobrowski@3electrons.com * | |
| 5 * * | |
| 6 * * | |
| 7 * This program is free software; you can redistribute it and/or modify * | |
| 8 * it under the terms of the GNU General Public License as published by * | |
| 9 * the Free Software Foundation; either version 2 of the License, or * | |
| 10 * (at your option) any later version. * | |
| 11 * * | |
| 12 * This program is distributed in the hope that it will be useful, * | |
| 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of * | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | |
| 15 * GNU General Public License for more details. * | |
| 16 * * | |
| 17 * You should have received a copy of the GNU General Public License * | |
| 18 * along with this program; if not, write to the * | |
| 19 * Free Software Foundation, Inc., * | |
| 20 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * | |
| 21 ***************************************************************************/ | |
| 22 | |
| 23 #include "functions.h" | |
| 24 | |
| 25 #include <iostream> | |
| 26 using namespace std; | |
| 27 | |
| 28 double minimalStep(double scaleSize, int steps) | |
| 29 { | |
| 30 scaleSize = std::abs(scaleSize); | |
| 31 double ms = scaleSize/steps; | |
| 32 double fractions[]={5,2,1}; | |
| 33 double multiply = 10; | |
| 34 double fraction = 1.0; | |
| 35 double test; | |
| 36 if (static_cast<int>(ms)<=5) multiply = 0.1 ; | |
| 37 | |
| 38 while (true) | |
| 39 { | |
| 40 for (int i=0;i<3;i++) | |
| 41 { | |
| 42 //cout<<"Fractions:"<<fractions[i]<<" scaleSize:"<<scaleSize<<" steps:"<<steps<<" steps*farction:"<<steps*fractions[i]<<endl; | |
| 43 if (fractions[i]<ms) | |
| 44 { | |
| 45 fraction =fractions[i]; | |
| 46 } | |
| 47 | |
| 48 fractions[i]*=multiply; | |
| 49 test = steps * fractions[i]; | |
| 50 if ( (test < scaleSize) && multiply< 1.0 ) return fraction; | |
| 51 if ( (test > scaleSize) && multiply> 1.0 ) return fraction; | |
| 52 } | |
| 53 } | |
| 54 | |
| 55 return fraction; | |
| 56 } |
