mirror of
https://github.com/mod-playerbots/azerothcore-wotlk.git
synced 2026-02-03 02:53:48 +00:00
107 lines
2.5 KiB
C++
107 lines
2.5 KiB
C++
/*
|
|
* This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "Random.h"
|
|
#include "Errors.h"
|
|
#include "SFMTRand.h"
|
|
#include <memory>
|
|
#include <random>
|
|
|
|
static thread_local std::unique_ptr<SFMTRand> sfmtRand;
|
|
static RandomEngine engine;
|
|
|
|
static SFMTRand* GetRng()
|
|
{
|
|
if (!sfmtRand)
|
|
{
|
|
sfmtRand = std::make_unique<SFMTRand>();
|
|
}
|
|
|
|
return sfmtRand.get();
|
|
}
|
|
|
|
int32 irand(int32 min, int32 max)
|
|
{
|
|
ASSERT(max >= min);
|
|
std::uniform_int_distribution<int32> uid(min, max);
|
|
return uid(engine);
|
|
}
|
|
|
|
uint32 urand(uint32 min, uint32 max)
|
|
{
|
|
ASSERT(max >= min);
|
|
std::uniform_int_distribution<uint32> uid(min, max);
|
|
return uid(engine);
|
|
}
|
|
|
|
uint32 urandms(uint32 min, uint32 max)
|
|
{
|
|
ASSERT(std::numeric_limits<uint32>::max() / Milliseconds::period::den >= max);
|
|
return urand(min * Milliseconds::period::den, max * Milliseconds::period::den);
|
|
}
|
|
|
|
float frand(float min, float max)
|
|
{
|
|
ASSERT(max >= min);
|
|
std::uniform_real_distribution<float> urd(min, max);
|
|
return urd(engine);
|
|
}
|
|
|
|
Milliseconds randtime(Milliseconds min, Milliseconds max)
|
|
{
|
|
long long diff = max.count() - min.count();
|
|
ASSERT(diff >= 0);
|
|
ASSERT(diff <= (uint32) - 1);
|
|
return min + Milliseconds(urand(0, diff));
|
|
}
|
|
|
|
Seconds randtime(Seconds min, Seconds max)
|
|
{
|
|
long long diff = max.count() - min.count();
|
|
ASSERT(diff >= 0);
|
|
ASSERT(diff <= (uint32) - 1);
|
|
return min + Seconds(urand(0, diff));
|
|
}
|
|
|
|
uint32 rand32()
|
|
{
|
|
return GetRng()->RandomUInt32();
|
|
}
|
|
|
|
double rand_norm()
|
|
{
|
|
std::uniform_real_distribution<double> urd;
|
|
return urd(engine);
|
|
}
|
|
|
|
double rand_chance()
|
|
{
|
|
std::uniform_real_distribution<double> urd(0.0, 100.0);
|
|
return urd(engine);
|
|
}
|
|
|
|
uint32 urandweighted(std::size_t count, double const* chances)
|
|
{
|
|
std::discrete_distribution<uint32> dd(chances, chances + count);
|
|
return dd(engine);
|
|
}
|
|
|
|
RandomEngine& RandomEngine::Instance()
|
|
{
|
|
return engine;
|
|
}
|