#include "Random.h"
#include "Errors.h"
#include "SFMTRand.h"
#include <memory>
#include <random>

Functions
static SFMTRand *	GetRng ()

int32	irand (int32 min, int32 max)

uint32	urand (uint32 min, uint32 max)

uint32	urandms (uint32 min, uint32 max)

float	frand (float min, float max)

Milliseconds	randtime (Milliseconds min, Milliseconds max)

uint32	rand32 ()

double	rand_norm ()

double	rand_chance ()

uint32	urandweighted (size_t count, double const *chances)

Variables
static thread_local std::unique_ptr< SFMTRand >	sfmtRand

static RandomEngine	engine

Function Documentation

◆ frand()

float frand	(	float	min,
		float	max
	)

{
    ASSERT(max >= min);
    std::uniform_real_distribution<float> urd(min, max);
    return urd(engine);
}

References ASSERT, and engine.

Referenced by npc_pos_martin_or_gorkun_second::npc_pos_martin_or_gorkun_secondAI::DoAction(), npc_time_rift::DoSummonAtRift(), Unit::GetMeleeAttackPoint(), FleeingMovementGenerator< T >::GetPoint(), npc_valkyr_shadowguard::npc_valkyr_shadowguardAI::GoSiphon(), go_tadpole_cage::go_tadpole_cageAI::GossipHello(), spell_item_unusual_compass::HandleDummy(), spell_entropius_black_hole_effect::spell_entropius_black_hole_effect_SpellScript::HandlePull(), spell_boss_magus_telestra_gravity_well::spell_boss_magus_telestra_gravity_well_SpellScript::HandlePull(), npc_eris_hevenfire::npc_eris_hevenfireAI::JustSummoned(), npc_akama_shade::JustSummoned(), spell_gen_random_target32::ModDest(), spell_q12308_escape_from_silverbrook_summon_worgen::ModDest(), spell_random_lightning_visual_effect::ModDestHeight(), npc_gunship_boarding_addAI::MovementInform(), SmartScript::ProcessAction(), npc_lake_frog::npc_lake_frogAI::ReceiveEmote(), spell_quest_dragonmaw_race_generic::RelocateDest(), npc_firework::npc_fireworkAI::Reset(), PassengerController::SelectSpawnPoint(), spell_q10898_skywing::spell_q10898_skywing_SpellScript::SetDest(), npc_icc_gauntlet_controller::npc_icc_gauntlet_controllerAI::SummonBroodling(), npc_eris_hevenfire::npc_eris_hevenfireAI::SummonPeasants(), instance_old_hillsbrad::instance_old_hillsbrad_InstanceMapScript::Update(), npc_scarlet_ghoul::npc_scarlet_ghoulAI::UpdateAI(), boss_arlokk::boss_arlokkAI::UpdateAI(), npc_pos_leader::npc_pos_leaderAI::UpdateAI(), npc_pos_martin_or_gorkun_second::npc_pos_martin_or_gorkun_secondAI::UpdateAI(), and npc_tirions_gambit_tirion::npc_tirions_gambit_tirionAI::UpdateEscortAI().

◆ GetRng()

static SFMTRand * GetRng ( )

static

{
    if (!sfmtRand)
    {
        sfmtRand = std::make_unique<SFMTRand>();
    }
 
    return sfmtRand.get();
}

References sfmtRand.

Referenced by rand32().

◆ irand()

int32 irand	(	int32	min,
		int32	max
	)

{
    ASSERT(max >= min);
    std::uniform_int_distribution<int32> uid(min, max);
    return uid(engine);
}

References ASSERT, and engine.

◆ rand32()

uint32 rand32 ( )

{
    return GetRng()->RandomUInt32();
}

References GetRng(), and SFMTRand::RandomUInt32().

Referenced by npc_thrall_bfu::npc_thrall_bfuAI::ActivateValimathrasPortal(), boss_nefarian::KilledUnit(), boss_vaelastrasz::boss_vaelAI::KilledUnit(), RandomEngine::operator()(), npc_varian_wrynn::npc_varian_wrynnAI::SpawnWave(), and npc_thrall_bfu::npc_thrall_bfuAI::SpawnWave().

◆ rand_chance()

double rand_chance ( )

{
    std::uniform_real_distribution<double> urd(0.0, 100.0);
    return urd(engine);
}

References engine.

Referenced by Spell::EffectInebriate(), GetExplicitDiscoverySpell(), GetItemEnchantMod(), WorldSession::HandleGMResponseResolve(), LootTemplate::LootGroup::Roll(), roll_chance_f(), PoolGroup< T >::SpawnObject(), and boss_majordomo::boss_majordomoAI::UpdateAI().

◆ rand_norm()

double rand_norm ( )

{
    std::uniform_real_distribution<double> urd;
    return urd(engine);
}

References engine.

Referenced by RandomMovementGenerator< T >::_setRandomLocation(), Unit::CalcAbsorbResist(), SpellImplicitTargetInfo::CalcDirectionAngle(), boss_headless_horseman::DamageTaken(), npc_midsummer_ribbon_pole_target::DoDancingFLameChecks(), RandomMovementGenerator< T >::DoInitialize(), ConfusedMovementGenerator< T >::DoInitialize(), npc_time_rift::DoSummonAtRift(), Spell::EffectStuck(), Spell::EffectTransmitted(), violet_hold_trashAI::EnterEvadeMode(), Unit::GetRandomContactPoint(), WorldObject::GetRandomNearPosition(), WorldObject::GetRandomPoint(), Position::GetSinCos(), npc_valkyr_shadowguard::npc_valkyr_shadowguardAI::GoSiphon(), spell_icc_geist_alarm::spell_icc_geist_alarm_SpellScript::HandleEvent(), WorldSession::HandlePetActionHelper(), spell_dreamwalker_summon_portal::spell_dreamwalker_summon_portal_SpellScript::HandleScript(), boss_onyxia::HandleWhelpSpam(), spell_q11065_wrangle_some_aether_rays_aura::if(), npc_troll_volunteer::npc_troll_volunteerAI::InitializeAI(), npc_hourglass_of_eternity::npc_hourglass_of_eternityAI::InitializeAI(), npc_pet_dk_army_of_the_dead::npc_pet_dk_army_of_the_deadAI::InitializeAI(), boss_auriaya::boss_auriayaAI::JustSummoned(), spell_the_lich_king_teleport_to_frostmourne_hc::spell_the_lich_king_teleport_to_frostmourne_hc_SpellScript::ModDest(), npc_ulduar_snow_mound::MoveInLineOfSight(), npc_concentrated_ball::npc_concentrated_ballAI::MoveToNextPoint(), npc_mechanolift::npc_mechanoliftAI::npc_mechanoliftAI(), Unit::PetSpellFail(), npc_oculus_unstable_sphere::npc_oculus_unstable_sphereAI::PickNewLocation(), Weather::ReGenerate(), boss_anubarak_trial::boss_anubarak_trialAI::Reset(), boss_bjarngrim::boss_bjarngrimAI::Reset(), spell_sindragosa_s_fury::spell_sindragosa_s_fury_SpellScript::SelectDest(), Spell::SelectImplicitCasterDestTargets(), Spell::SelectImplicitDestDestTargets(), Spell::SelectImplicitTargetDestTargets(), boss_yoggsaron_sara::boss_yoggsaron_saraAI::SpawnTentacle(), npc_pos_leader_second::npc_pos_leader_secondAI::SpellHitTarget(), npc_icc_gauntlet_controller::npc_icc_gauntlet_controllerAI::SummonBroodling(), boss_yoggsaron_sara::boss_yoggsaron_saraAI::SummonDeathOrbs(), boss_yoggsaron::boss_yoggsaronAI::SummonImmortalGuardian(), instance_old_hillsbrad::instance_old_hillsbrad_InstanceMapScript::Update(), instance_trial_of_the_champion::instance_trial_of_the_champion_InstanceMapScript::Update(), npc_dark_iron_attack_generator::UpdateAI(), npc_time_rift::UpdateAI(), boss_onyxia::UpdateAI(), boss_icehowl::boss_icehowlAI::UpdateAI(), boss_twin_valkyrAI::UpdateAI(), npc_pos_leader::npc_pos_leaderAI::UpdateAI(), boss_sindragosa::boss_sindragosaAI::UpdateAI(), npc_strangulate_vehicle::npc_strangulate_vehicleAI::UpdateAI(), boss_malygos::boss_malygosAI::UpdateAI(), boss_ormorok::boss_ormorokAI::UpdateAI(), boss_drakos::boss_drakosAI::UpdateAI(), boss_eregos::boss_eregosAI::UpdateAI(), boss_mimiron::boss_mimironAI::UpdateAI(), npc_ulduar_flames_initial::npc_ulduar_flames_initialAI::UpdateAI(), npc_ulduar_expedition_engineer::npc_ulduar_expedition_engineerAI::UpdateAI(), boss_keleseth::boss_kelesethAI::UpdateAI(), boss_ymiron::boss_ymironAI::UpdateAI(), npc_hourglass_of_eternity::npc_hourglass_of_eternityAI::UpdateAI(), boss_ahune::UpdateAI(), and boss_ichoron::boss_ichoronAI::UpdateAI().

◆ randtime()

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));
}

References ASSERT, and urand().

Referenced by EventProcessor::AddEventAtOffset(), boss_hungarfen::JustEngagedWith(), EventMap::Repeat(), EventMap::RescheduleEvent(), and EventMap::ScheduleEvent().

◆ urand()

uint32 urand	(	uint32	min,
		uint32	max
	)

{
    ASSERT(max >= min);
    std::uniform_int_distribution<uint32> uid(min, max);
    return uid(engine);
}

References ASSERT, and engine.

◆ urandms()

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);
}

References ASSERT, and urand().

◆ urandweighted()

uint32 urandweighted	(	size_t	count,
		double const *	chances
	)

{
    std::discrete_distribution<uint32> dd(chances, chances + count);
    return dd(engine);
}

References engine.

Referenced by Acore::Containers::SelectRandomWeightedContainerElement().

Variable Documentation

◆ engine

RandomEngine engine

static

Referenced by frand(), RandomEngine::Instance(), irand(), rand_chance(), rand_norm(), urand(), and urandweighted().

◆ sfmtRand

thread_local std::unique_ptr<SFMTRand> sfmtRand

static

Referenced by GetRng().

Functions

Variables

Function Documentation

◆ frand()

◆ GetRng()

◆ irand()

◆ rand32()

◆ rand_chance()

◆ rand_norm()

◆ randtime()

◆ urand()

◆ urandms()

◆ urandweighted()

Variable Documentation

◆ engine

◆ sfmtRand