improve script hot reload

src/pxl8_rng.c

@@ -0,0 +1,24 @@
+#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);
+}