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Replace harcoded assumption of RAND_MAX with constant. It caused an infinite loop if RAND_MAX > 32767

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hugovk 2015-03-05 23:14:36 +02:00
parent 2c70c9e5e9
commit f1333617d5
1 changed files with 2 additions and 2 deletions
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4
libImaging/Effects.c
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@ -98,8 +98,8 @@ ImagingEffectNoise(int xsize, int ysize, float sigma)
/* after numerical recipes */
double v1, v2, radius, factor;
do {
v1 = rand()*(2.0/32767.0) - 1.0;
v2 = rand()*(2.0/32767.0) - 1.0;
v1 = rand()*(2.0/RAND_MAX) - 1.0;
v2 = rand()*(2.0/RAND_MAX) - 1.0;
radius= v1*v1 + v2*v2;
} while (radius >= 1.0);
factor = sqrt(-2.0*log(radius)/radius);