25 lines
585 B
C
25 lines
585 B
C
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#include "pxl8_rng.h"
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void pxl8_rng_seed(pxl8_rng* rng, u32 seed) {
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if (!rng) return;
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rng->state = seed ? seed : 1;
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}
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u32 pxl8_rng_next(pxl8_rng* rng) {
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if (!rng) return 0;
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rng->state ^= rng->state << 13;
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rng->state ^= rng->state >> 17;
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rng->state ^= rng->state << 5;
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return rng->state;
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}
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f32 pxl8_rng_f32(pxl8_rng* rng) {
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return (f32)pxl8_rng_next(rng) / (f32)0xFFFFFFFF;
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}
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i32 pxl8_rng_range(pxl8_rng* rng, i32 min, i32 max) {
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if (min >= max) return min;
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u32 range = (u32)(max - min);
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return min + (i32)(pxl8_rng_next(rng) % range);
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}
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