diff options
Diffstat (limited to 'core')
| -rw-r--r-- | core/math/random_pcg.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/core/math/random_pcg.h b/core/math/random_pcg.h index fe40e7f76a..cc22b23b70 100644 --- a/core/math/random_pcg.h +++ b/core/math/random_pcg.h @@ -126,10 +126,18 @@ public: } _FORCE_INLINE_ double randfn(double p_mean, double p_deviation) { - return p_mean + p_deviation * (cos(Math_TAU * randd()) * sqrt(-2.0 * log(randd()))); // Box-Muller transform + double temp = randd(); + if (temp < CMP_EPSILON) { + temp += CMP_EPSILON; // To prevent generating of INF value in log function, resulting to return NaN value from this function. + } + return p_mean + p_deviation * (cos(Math_TAU * randd()) * sqrt(-2.0 * log(temp))); // Box-Muller transform. } _FORCE_INLINE_ float randfn(float p_mean, float p_deviation) { - return p_mean + p_deviation * (cos((float)Math_TAU * randf()) * sqrt(-2.0 * log(randf()))); // Box-Muller transform + float temp = randf(); + if (temp < CMP_EPSILON) { + temp += CMP_EPSILON; // To prevent generating of INF value in log function, resulting to return NaN value from this function. + } + return p_mean + p_deviation * (cos((float)Math_TAU * randf()) * sqrt(-2.0 * log(temp))); // Box-Muller transform. } double random(double p_from, double p_to); |