asrael
49256db1bd
- core/: main entry, types, logging, I/O, RNG - asset/: ase loader, cart, save, embed - gfx/: graphics, animation, atlas, fonts, tilemap, transitions - sfx/: audio - script/: lua/fennel runtime, REPL - hal/: platform abstraction (SDL3) - world/: BSP, world, procedural gen - math/: math utilities - game/: GUI, replay - lua/: Lua API modules
24 lines
585 B
C
24 lines
585 B
C
#include "pxl8_rng.h"
|
|
|
|
void pxl8_rng_seed(pxl8_rng* rng, u32 seed) {
|
|
if (!rng) return;
|
|
rng->state = seed ? seed : 1;
|
|
}
|
|
|
|
u32 pxl8_rng_next(pxl8_rng* rng) {
|
|
if (!rng) return 0;
|
|
rng->state ^= rng->state << 13;
|
|
rng->state ^= rng->state >> 17;
|
|
rng->state ^= rng->state << 5;
|
|
return rng->state;
|
|
}
|
|
|
|
f32 pxl8_rng_f32(pxl8_rng* rng) {
|
|
return (f32)pxl8_rng_next(rng) / (f32)0xFFFFFFFF;
|
|
}
|
|
|
|
i32 pxl8_rng_range(pxl8_rng* rng, i32 min, i32 max) {
|
|
if (min >= max) return min;
|
|
u32 range = (u32)(max - min);
|
|
return min + (i32)(pxl8_rng_next(rng) % range);
|
|
}
|