/*************************************************************************/
/*  random_pcg.cpp                                                       */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md)    */
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#include "random_pcg.h"

#include "core/os/os.h"

RandomPCG::RandomPCG(uint64_t seed, uint64_t inc) :
		pcg() {
	pcg.state = seed;
	pcg.inc = inc;
}

void RandomPCG::randomize() {
	seed(OS::get_singleton()->get_ticks_usec() * pcg.state + PCG_DEFAULT_INC_64);
}

double RandomPCG::random(double from, double to) {
	unsigned int r = rand();
	double ret = (double)r / (double)RANDOM_MAX;
	return (ret) * (to - from) + from;
}

float RandomPCG::random(float from, float to) {
	unsigned int r = rand();
	float ret = (float)r / (float)RANDOM_MAX;
	return (ret) * (to - from) + from;
}