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Fix some loose ends from 3993093f

This commit is contained in:
kwolekr 2015-03-22 02:58:47 -04:00
parent 3993093f51
commit 761b127060
1 changed files with 4 additions and 2 deletions
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6
src/noise.cpp
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@ -106,7 +106,8 @@ u32 PcgRandom::range(u32 bound)
u32 threshhold = -bound % bound; u32 threshhold = -bound % bound;
u32 r; u32 r;
while ((r = next()) < threshhold); while ((r = next()) < threshhold)
;
return r % bound; return r % bound;
} }
@ -127,6 +128,7 @@ void PcgRandom::bytes(void *out, size_t len)
size_t len_alignment = (uintptr_t)out % sizeof(u32); size_t len_alignment = (uintptr_t)out % sizeof(u32);
if (len_alignment) { if (len_alignment) {
len -= len_alignment;
r = next(); r = next();
while (len_alignment--) { while (len_alignment--) {
*outb = r & 0xFF; *outb = r & 0xFF;
@ -156,7 +158,7 @@ void PcgRandom::bytes(void *out, size_t len)
s32 PcgRandom::randNormalDist(s32 min, s32 max, int num_trials) s32 PcgRandom::randNormalDist(s32 min, s32 max, int num_trials)
{ {
u32 accum = 0; s32 accum = 0;
for (int i = 0; i != num_trials; i++) for (int i = 0; i != num_trials; i++)
accum += range(min, max); accum += range(min, max);
return ((float)accum / num_trials) + 0.5f; return ((float)accum / num_trials) + 0.5f;