using System; using System.Collections.Generic; using System.Linq; using System.Text; using V = Science.Mathematics.VectorCalculus; namespace VectorCalculus5Ed.Chapter2.Section1 { public class Example04 { public Example04() { } private string result; public string Result { get{return result;} } public void Compute() { Science.Mathematics.Function.ToLastType cf = new Science.Mathematics.Function.ToLastType(Box); V.Domain2D xd = new V.Domain2D(); xd.ConditionFunctionsLessThanZero = cf; xd.LowerBoundOfX = -1.0; xd.LowerBoundOfY = -1.0; xd.UpperBoundOfX = 1.0; xd.UpperBoundOfY = 1.0; Science.Mathematics.Function.ToLastType f = new Science.Mathematics.Function.ToLastType(func); V.LevelCurve ls = new V.LevelCurve(f, -0.5, xd); ls.FindCurve(0.01); for (int i = 0; i < ls.CurvePointX.Count; i++) { result += ls.CurvePointX[i].ToString() + "\t"; result += ls.CurvePointY[i].ToString() + "\r\n"; } } private double func(double x, double y) { return x * x - y * y; } private double[] Box(double x, double y) { double[] f = new double[1]; f[0] = - 1.0; return f; } } } /* -0.70709219858156 -1 -0.7 -0.994974874371859 -0.692877697841727 -0.99 -0.69 -0.987969543147208 -0.69 0.987969543147208 -0.68 -0.981015228426396 -0.678518518518518 -0.98 -0.678518518518518 0.98 -0.68 0.981015228426396 -0.67 -0.974102564102564 -0.663984962406015 -0.97 -0.663984962406015 0.97 -0.67 0.974102564102564 -0.66 -0.967253886010363 -0.66 0.967253886010363 -0.65 -0.960466321243523 -0.649302325581395 -0.96 -0.649302325581395 0.96 -0.65 0.960466321243523 -0.64 -0.953717277486911 -0.634409448818898 -0.95 -0.634409448818898 0.95 -0.64 0.953717277486911 -0.63 -0.947037037037037 -0.63 0.947037037037037 -0.62 -0.94042328042328 -0.619349593495935 -0.94 -0.619349593495935 0.94 -0.62 0.94042328042328 -0.61 -0.933850267379679 -0.604049586776859 -0.93 -0.604049586776859 0.93 -0.61 0.933850267379679 -0.6 -0.927351351351351 -0.6 0.927351351351351 -0.59 -0.920918918918919 -0.588547008547009 -0.92 -0.588547008547008 0.92 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