65 lines
1.5 KiB
C#
65 lines
1.5 KiB
C#
using StgSharp.Controlling;
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace StgSharp.Math
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{
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public static unsafe partial class Calc
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{
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internal static float currentSeed
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#if DEBUG
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= 0.5f;
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#else
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= Calc.Abs(System.DateTime.UtcNow.GetHashCode());
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#endif
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/// <summary>
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/// returns a random float number between 0 and 1.
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/// </summary>
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/// <returns></returns>
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public static unsafe float Random()
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{
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float seed = currentSeed;
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float sample = Calc.Pow(Calc.SeedSqrt(seed),2);
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float sample2 = (sample - seed) / seed;
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sample2 = Calc.Abs(sample2);
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if (sample==1)
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{
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sample = sample2;
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}
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currentSeed = sample;
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sample2 *= 1000000;
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float result = sample2-(int)sample2;
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if (result == 0)
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{
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currentSeed = sample2+0.1f;
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result = Calc.Random();
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}
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return result;
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}
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/// <summary>
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/// Generates a random seed in int value.
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/// </summary>
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/// <returns></returns>
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public static unsafe int RandomSeed()
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{
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float seedValue1 = Random();
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float seedValue2 = Random();
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uint seedValueBits = *(uint*)&seedValue1;
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float seedValue = seedValueBits * seedValue2;
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return *(int*)&seedValue;
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}
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}
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}
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