#region License Information /* HeuristicLab * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL) * * This file is part of HeuristicLab. * * HeuristicLab 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. * * HeuristicLab 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 HeuristicLab. If not, see . */ #endregion using System; namespace HeuristicLab.Visualization.ChartControlsExtensions { public static class ChartUtil { public static void CalculateAxisInterval(double min, double max, int ticks, out double axisMin, out double axisMax, out double axisInterval) { var dmin = min.Decimals(); axisMin = min.Floor(dmin); var range = max - axisMin; var slice = range / ticks; var dslice = slice.Decimals(); var floor = slice.Floor(dslice); var ceil = slice.Ceil(dslice); var axisRange = floor * ticks; axisInterval = floor; if (axisRange < max - axisMin) { axisRange = ceil * ticks; axisInterval = ceil; } axisMax = axisMin + axisRange; } private static int Decimals(this double x) { if (x.IsAlmost(0) || double.IsInfinity(x) || double.IsNaN(x)) return 0; var v = Math.Abs(x); int d = 0; while (v < 1) { v *= 10; d++; } return d; } // rounds down to the nearest value according to the given number of decimal precision private static double Floor(this double value, int precision) { var n = Math.Pow(10, precision); return Math.Round(Math.Floor(value * n) / n, precision); } private static double Ceil(this double value, int precision) { var n = Math.Pow(10, precision); return Math.Round(Math.Ceiling(value * n) / n, precision); } private static double Round(this double value, int precision) { var n = Math.Pow(10, precision); return Math.Round(Math.Round(value * n) / n, precision); } private static bool IsAlmost(this double value, double other, double eps = 1e-12) { return Math.Abs(value - other) < eps; } } }