#include "rng.h"

#include <limits.h>
#include <stdlib.h>
#include <sys/time.h>

void rng_init()
{
	struct timeval tv;
	gettimeofday(&tv, NULL);
	srand(tv.tv_usec);
}

double rng_double()
{
	return 2.0 * (double)rand() / (double)INT_MAX - 1.0;
}

vec3_t rng_vec3()
{
	const vec3_t v = { rng_double(), rng_double(), rng_double() };
	return vec3_unit(v);
}