#include "prandom.qh"
#include "_all.qh"

#include "../warpzonelib/mathlib.qh"

// prandom - PREDICTABLE random number generator (not seeded yet)

#ifdef USE_PRANDOM
float prandom_seed;
float prandom()
{
	float c;
	c = crc16(false, strcat(ftos(prandom_seed), ftos(prandom_seed + M_PI)));
	prandom_seed = c;

#ifdef USE_PRANDOM_DEBUG
	dprint("RANDOM -> ", ftos(c), "\n");
#endif

	return c / 65536; // in [0..1[
}

vector prandomvec()
{
	vector v;

	do
	{
		v.x = prandom();
		v.y = prandom();
		v.z = prandom();
	}
	while(v * v > 1);

	return v;
}

void psrandom(float seed)
{
	prandom_seed = seed;
#ifdef USE_PRANDOM_DEBUG
	dprint("SRANDOM ", ftos(seed), "\n");
#endif
}

#ifdef USE_PRANDOM_DEBUG
void prandom_debug()
{
	dprint("Current random seed = ", ftos(prandom_seed), "\n");
}
#endif
#endif