35 lines
993 B
C#
35 lines
993 B
C#
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using System;
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using System.Threading;
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using System.Threading.Tasks;
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namespace FastRng.Double.Distributions
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{
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public sealed class InverseExponentialLa10 : IDistribution
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{
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private const double LAMBDA = 10.0;
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private const double CONSTANT = 4.539992976248453e-06;
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private ShapeFitter fitter;
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private IRandom random;
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public IRandom Random
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{
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get => this.random;
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set
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{
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this.random = value;
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this.fitter = new ShapeFitter(InverseExponentialLa10.ShapeFunction, this.random, 100);
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}
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}
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private static double ShapeFunction(double x) => CONSTANT * LAMBDA * Math.Exp(LAMBDA * x);
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public async ValueTask<double> GetDistributedValue(CancellationToken token = default)
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{
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if (this.Random == null)
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return double.NaN;
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return await this.fitter.NextNumber(token);
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}
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}
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}
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