random.qc File Reference

#include "random.qh"

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Functions
ERASEABLE float	DistributeEvenly_Get (float weight)
ERASEABLE float	DistributeEvenly_GetRandomized (float weight)
ERASEABLE void	DistributeEvenly_Init (float amount, float totalweight)
ERASEABLE float	gsl_ran_gaussian (float sigma)
float	prandom ()
vector	prandomvec ()
void	psrandom (float seed)
ERASEABLE void	RandomSelection_Add (entity e, float f, string s, vector v, float weight, float priority)
ERASEABLE void	RandomSelection_Init ()

Variables
float	DistributeEvenly_amount
float	DistributeEvenly_totalweight
float	gsl_ran_gaussian_lastvalue
float	gsl_ran_gaussian_lastvalue_set
float	prandom_seed

Function Documentation

DistributeEvenly_Get()

ERASEABLE float DistributeEvenly_Get

(

float

weight

)

Definition at line 54 of file random.qc.

References DistributeEvenly_amount, DistributeEvenly_totalweight, ERASEABLE, and floor().

Referenced by Invasion_RoundStart(), kh_LoserTeam(), and kh_WinnerTeam().

{
    float f;
    if (weight <= 0) return 0;
    f = floor(0.5 + DistributeEvenly_amount * weight / DistributeEvenly_totalweight);
    DistributeEvenly_totalweight -= weight;
    DistributeEvenly_amount -= f;
    return f;
}

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DistributeEvenly_GetRandomized()

ERASEABLE float DistributeEvenly_GetRandomized

(

float

weight

)

Definition at line 65 of file random.qc.

References DistributeEvenly_amount, DistributeEvenly_totalweight, floor(), and random().

{
    float f;
    if (weight <= 0) return 0;
    f = floor(random() + DistributeEvenly_amount * weight / DistributeEvenly_totalweight);
    DistributeEvenly_totalweight -= weight;
    DistributeEvenly_amount -= f;
    return f;
}

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DistributeEvenly_Init()

ERASEABLE void DistributeEvenly_Init	(	float	amount,
		float	totalweight
	)

Definition at line 42 of file random.qc.

References DistributeEvenly_amount, DistributeEvenly_totalweight, ERASEABLE, ftos(), and LOG_TRACE.

Referenced by Invasion_RoundStart(), kh_LoserTeam(), and kh_WinnerTeam().

{
    if (DistributeEvenly_amount)
    {
        LOG_TRACE("DistributeEvenly_Init: UNFINISHED DISTRIBUTION (", ftos(DistributeEvenly_amount), " for ", ftos(DistributeEvenly_totalweight), " left!)");
    }
    if (totalweight == 0) DistributeEvenly_amount = 0;
    else DistributeEvenly_amount = amount;
    DistributeEvenly_totalweight = totalweight;
}

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gsl_ran_gaussian()

ERASEABLE float gsl_ran_gaussian

(

float

sigma

)

Definition at line 79 of file random.qc.

References cos(), gsl_ran_gaussian_lastvalue, gsl_ran_gaussian_lastvalue_set, log(), M_PI, random(), sin(), and sqrt().

Referenced by W_CalculateSpread().

{
    if (gsl_ran_gaussian_lastvalue_set)
    {
        gsl_ran_gaussian_lastvalue_set = 0;
        return sigma * gsl_ran_gaussian_lastvalue;
    }
    else
    {
        float a = random() * 2 * M_PI;
        float b = sqrt(-2 * log(random()));
        gsl_ran_gaussian_lastvalue = cos(a) * b;
        gsl_ran_gaussian_lastvalue_set = 1;
        return sigma * sin(a) * b;
    }
}

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prandom()

float prandom

(

)

Definition at line 100 of file random.qc.

References ftos(), LOG_TRACE, M_PI, prandom_seed, and strcat().

Referenced by prandomvec(), SND_GIB_SPLAT_RANDOM(), and turret_gibtoss().

    {
        float c;
        c = crc16(false, strcat(ftos(prandom_seed), ftos(prandom_seed + M_PI)));
        prandom_seed = c;

    #ifdef USE_PRANDOM_DEBUG
            LOG_TRACE("RANDOM -> ", ftos(c));
    #endif

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

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prandomvec()

vector prandomvec

(

)

Definition at line 113 of file random.qc.

References prandom(), v, and vector().

Referenced by turret_gibtoss().

    {
        vector v;

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

        return v;
    }

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psrandom()

void psrandom

(

float

seed

)

Definition at line 128 of file random.qc.

References ftos(), LOG_TRACE, prandom_debug, and prandom_seed.

Referenced by NET_HANDLE().

    {
        prandom_seed = seed;
    #ifdef USE_PRANDOM_DEBUG
            LOG_TRACE("SRANDOM ", ftos(seed));
    #endif
    }

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RandomSelection_Add()

ERASEABLE void RandomSelection_Add	(	entity	e,
		float	f,
		string	s,
		vector	v,
		float	weight,
		float	priority
	)

Definition at line 14 of file random.qc.

References random(), RandomSelection_best_priority, RandomSelection_chosen_ent, RandomSelection_chosen_float, RandomSelection_chosen_string, RandomSelection_chosen_vec, RandomSelection_totalweight, and v.

Referenced by MUTATOR_HOOKFUNCTION().

{
    if (priority > RandomSelection_best_priority)
    {
        RandomSelection_best_priority = priority;
        RandomSelection_chosen_ent = e;
        RandomSelection_chosen_float = f;
        RandomSelection_chosen_string = s;
        RandomSelection_chosen_vec = v;
        RandomSelection_totalweight = weight;
    }
    else if (priority == RandomSelection_best_priority)
    {
        RandomSelection_totalweight += weight;
        if (random() * RandomSelection_totalweight <= weight)
        {
            RandomSelection_chosen_ent = e;
            RandomSelection_chosen_float = f;
            RandomSelection_chosen_string = s;
            RandomSelection_chosen_vec = v;
        }
    }
}

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RandomSelection_Init()

ERASEABLE void RandomSelection_Init

(

)

Definition at line 4 of file random.qc.

References ERASEABLE, NULL, RandomSelection_best_priority, RandomSelection_chosen_ent, RandomSelection_chosen_float, RandomSelection_chosen_string, RandomSelection_totalweight, and string_null.

Referenced by bot_setnameandstuff(), buff_NewType(), CheatCommand(), CheatImpulse(), FixIntermissionClient(), GiveRandomWeapons(), invasion_PickMonster(), invasion_PickSpawn(), invasion_SpawnChosenMonster(), Item_FindTeam(), Item_Touch(), jumppad_push(), MapInfo_LoadMapSettings(), MapVote_CheckRules_2(), MUTATOR_HOOKFUNCTION(), NIX_ChooseNextWeapon(), RandomItems_GetRandomInstagibItemClassName(), RandomItems_GetRandomItemClassNameWithProperty(), RandomItems_GetRandomOverkillItemClassName(), RandomItems_GetRandomVanillaItemClassName(), Simple_TeleportPlayer(), Spawn_WeightedPoint(), spawnmonster(), SUB_UseTargets_Ex(), TeamBalance_FindBestTeam(), TeleportPlayer(), train_next_find(), and W_RandomWeapons().

{
    RandomSelection_totalweight = 0;
    RandomSelection_chosen_ent = NULL;
    RandomSelection_chosen_float = 0;
    RandomSelection_chosen_string = string_null;
    RandomSelection_best_priority = -1;
}

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Variable Documentation

DistributeEvenly_amount

float DistributeEvenly_amount

Definition at line 38 of file random.qc.

Referenced by DistributeEvenly_Get(), DistributeEvenly_GetRandomized(), and DistributeEvenly_Init().

DistributeEvenly_totalweight

float DistributeEvenly_totalweight

Definition at line 39 of file random.qc.

Referenced by DistributeEvenly_Get(), DistributeEvenly_GetRandomized(), and DistributeEvenly_Init().

gsl_ran_gaussian_lastvalue

float gsl_ran_gaussian_lastvalue

Definition at line 76 of file random.qc.

Referenced by gsl_ran_gaussian().

gsl_ran_gaussian_lastvalue_set

float gsl_ran_gaussian_lastvalue_set

Definition at line 77 of file random.qc.

Referenced by gsl_ran_gaussian().

prandom_seed

float prandom_seed

Definition at line 99 of file random.qc.

Referenced by prandom(), and psrandom().