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- #include <grass/config.h>
- #include <stdlib.h>
- #include <grass/gmath.h>
- /*!
- * \fn float G_math_rand (int seed)
- *
- * \brief Random Number Generator (Uniform)
- *
- * Random number generator (Uniform Derivatives 0.0 -> 1.0)
- *
- * \param[in] seed
- * \return float
- */
- float G_math_rand(int seed)
- {
- #if defined(HAVE_DRAND48)
- if (seed < 0)
- srand48(-seed);
- return (float)drand48();
- #else
- if (seed < 0)
- srand(-seed);
- return 1.0f * rand() / RAND_MAX;
- #endif
- }
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