0449f39015
Added a central random function for chance calculation Added a missing status change end for SC_SPIRIT on jobchange
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
// Copyright (c) rAthena Dev Teams - Licensed under GNU GPL
|
|
// For more information, see LICENCE in the main folder
|
|
|
|
#include "random.hpp"
|
|
|
|
#include <random>
|
|
|
|
std::mt19937 generator;
|
|
std::uniform_int_distribution<int32> int31_distribution;
|
|
std::uniform_int_distribution<uint32> uint32_distribution;
|
|
|
|
/// Initializes the random number generator
|
|
void rnd_init( void ){
|
|
std::random_device device;
|
|
generator = std::mt19937( device() );
|
|
int31_distribution = std::uniform_int_distribution<int32>( 0, SINT32_MAX );
|
|
uint32_distribution = std::uniform_int_distribution<uint32>( 0, UINT32_MAX );
|
|
}
|
|
|
|
/// Generates a random number in the interval [0, SINT32_MAX]
|
|
int32 rnd( void ){
|
|
return int31_distribution( generator );
|
|
}
|
|
|
|
/// Generates a random number in the interval [0, UINT32_MAX]
|
|
uint32 rnd_uint32( void ){
|
|
return uint32_distribution( generator );
|
|
}
|
|
|
|
/// Generates a random number in the interval [0.0, 1.0)
|
|
/// NOTE: interval is open ended, so 1.0 is excluded
|
|
double rnd_uniform( void ){
|
|
return rnd_uint32() * ( 1.0 / 4294967296.0 );// divided by 2^32
|
|
}
|
|
|
|
/// Generates a random number in the interval [min, max]
|
|
/// Returns min if range is invalid.
|
|
int32 rnd_value( int32 min, int32 max ){
|
|
if( min >= max ){
|
|
return min;
|
|
}
|
|
|
|
return min + (int32)( rnd_uniform() * ( max - min + 1 ) );
|
|
}
|
|
|
|
bool rnd_chance( uint16 chance, uint16 base ){
|
|
return rnd_value( 0, base ) < chance;
|
|
}
|