diff -r cf4e83cecdb5 -r dcd472be9ae8 src/analog/functions.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/analog/functions.cpp	Wed Jun 29 21:28:13 2022 +0200
@@ -0,0 +1,56 @@
+/***************************************************************************
+ *   Copyright (C) 2006-2008 by Tomasz Ziobrowski                          *
+ *   http://www.3electrons.com                                             *
+ *   e-mail: t.ziobrowski@3electrons.com                                   *
+ *                                                                         *
+ *                                                                         *
+ *   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.             *
+ ***************************************************************************/
+
+#include "functions.h"
+
+#include <iostream>
+using namespace std; 
+
+double minimalStep(double scaleSize, int steps)
+{
+  scaleSize = std::abs(scaleSize); 
+  double ms = scaleSize/steps; 
+  double fractions[]={5,2,1}; 
+  double multiply = 10; 
+  double fraction = 1.0; 
+  double test; 
+  if (static_cast<int>(ms)<=5) multiply = 0.1 ; 
+
+  while (true)
+  {
+     for (int i=0;i<3;i++)
+     {
+      //cout<<"Fractions:"<<fractions[i]<<" scaleSize:"<<scaleSize<<" steps:"<<steps<<" steps*farction:"<<steps*fractions[i]<<endl; 
+       if (fractions[i]<ms)
+          { 
+           fraction =fractions[i]; 
+          }
+       
+         fractions[i]*=multiply; 
+         test = steps * fractions[i]; 
+         if ( (test < scaleSize) && multiply< 1.0 ) return fraction; 
+         if ( (test > scaleSize) && multiply> 1.0 ) return fraction; 
+     }  
+  }
+ 
+  return fraction; 
+}