28 lines
829 B
C#
28 lines
829 B
C#
namespace Game.Blackjack;
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/// <summary>
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/// Mulberry32 PRNG — a fast, high-quality 32-bit random number generator.
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/// Seed is stored in the ECS GameState singleton.
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/// </summary>
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public static class Mulberry32
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{
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/// <summary>
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/// Advances the state and returns a random float in [0, 1).
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/// </summary>
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public static float NextFloat(ref uint state)
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{
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state += 0x6D2B79F5u;
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uint z = state;
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z = (z ^ (z >> 15)) * (z | 1u);
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z ^= z + (z ^ (z >> 7)) * (z | 61u);
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return (z ^ (z >> 14)) / (float)uint.MaxValue;
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}
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/// <summary>
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/// Advances the state and returns a random integer in [min, max].
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/// </summary>
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public static int NextInt(ref uint state, int min, int max)
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{
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return (int)(NextFloat(ref state) * (max - min + 1)) + min;
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}
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} |