48 lines
825 B
C
48 lines
825 B
C
/* date = April 11th 2022 6:11 pm */
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#ifndef LUMENARIUM_RANDOM_H
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#define LUMENARIUM_RANDOM_H
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struct Random_Series
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{
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u32 last_value;
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};
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internal Random_Series
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random_series_create(u32 seed)
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{
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Random_Series result = {};
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result.last_value = seed;
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return result;
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}
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internal u32
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random_series_next(Random_Series* s)
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{
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u32 result = s->last_value;
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result ^= result << 13;
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result ^= result >> 17;
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result ^= result << 5;
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s->last_value = result;
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return result;
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}
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internal r32
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random_series_next_unilateral(Random_Series* s)
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{
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r32 result = random_series_next(s) / (r32)(0xFFFFFFFF);
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return result;
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}
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internal r32
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random_series_next_bilateral(Random_Series* s)
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{
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r32 result = random_series_next(s) / (r32)(0xFFFFFFFF);
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result = (result * 2.0f) - 1.0f;
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return result;
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}
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#endif //LUMENARIUM_RANDOM_H
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