From 53e22b11857fed62e2313d6d84d90f88ed412ffb Mon Sep 17 00:00:00 2001 From: Alexander Harkness Date: Mon, 29 Jul 2013 12:13:03 +0100 Subject: Changed everyting to Unix line endings. --- source/FastRandom.h | 114 ++++++++++++++++++++++++++-------------------------- 1 file changed, 57 insertions(+), 57 deletions(-) (limited to 'source/FastRandom.h') diff --git a/source/FastRandom.h b/source/FastRandom.h index 011c0c8da..bf70822cf 100644 --- a/source/FastRandom.h +++ b/source/FastRandom.h @@ -1,57 +1,57 @@ - -// FastRandom.h - -// Declares the cFastRandom class representing a fast random number generator - -/* -The cFastRandom aims to provide a very fast, although not very cryptographically secure, random generator. -It is fast to instantiate, fast to query next, and partially multi-thread-safe. -It is multi-thread-safe in the sense that it can be accessed from multiple threads without crashing, but it may -yield duplicate numbers in that case. - -Internally, this works similar to cNoise's integral noise generation, with some predefined inputs: the seed is -taken from a global counter and the random is calculated using a counter that is incremented on each use (hence -the multi-thread duplication). Two alternatives exists for each function, one that takes a range parameter, -and another that takes an additional "salt" parameter; this salt is used as an additional input to the random, -in order to avoid multi-thread duplication. If two threads both use the class at the same time with different -salts, the values they get will be different. -*/ - - - - - -#pragma once - - - - - -class cFastRandom -{ -public: - cFastRandom(void); - - /// Returns a random int in the range [0 .. a_Range - 1]; a_Range must be less than 1M - int NextInt(int a_Range); - - /// Returns a random int in the range [0 .. a_Range - 1]; a_Range must be less than 1M; a_Salt is additional source of randomness - int NextInt(int a_Range, int a_Salt); - - /// Returns a random float in the range [0 .. a_Range]; a_Range must be less than 1M - float NextFloat(float a_Range); - - /// Returns a random float in the range [0 .. a_Range]; a_Range must be less than 1M; a_Salt is additional source of randomness - float NextFloat(float a_Range, int a_Salt); - -protected: - int m_Seed; - int m_Counter; - - /// Counter that is used to initialize the seed, incremented for each object created - static int m_SeedCounter; -} ; - - - - + +// FastRandom.h + +// Declares the cFastRandom class representing a fast random number generator + +/* +The cFastRandom aims to provide a very fast, although not very cryptographically secure, random generator. +It is fast to instantiate, fast to query next, and partially multi-thread-safe. +It is multi-thread-safe in the sense that it can be accessed from multiple threads without crashing, but it may +yield duplicate numbers in that case. + +Internally, this works similar to cNoise's integral noise generation, with some predefined inputs: the seed is +taken from a global counter and the random is calculated using a counter that is incremented on each use (hence +the multi-thread duplication). Two alternatives exists for each function, one that takes a range parameter, +and another that takes an additional "salt" parameter; this salt is used as an additional input to the random, +in order to avoid multi-thread duplication. If two threads both use the class at the same time with different +salts, the values they get will be different. +*/ + + + + + +#pragma once + + + + + +class cFastRandom +{ +public: + cFastRandom(void); + + /// Returns a random int in the range [0 .. a_Range - 1]; a_Range must be less than 1M + int NextInt(int a_Range); + + /// Returns a random int in the range [0 .. a_Range - 1]; a_Range must be less than 1M; a_Salt is additional source of randomness + int NextInt(int a_Range, int a_Salt); + + /// Returns a random float in the range [0 .. a_Range]; a_Range must be less than 1M + float NextFloat(float a_Range); + + /// Returns a random float in the range [0 .. a_Range]; a_Range must be less than 1M; a_Salt is additional source of randomness + float NextFloat(float a_Range, int a_Salt); + +protected: + int m_Seed; + int m_Counter; + + /// Counter that is used to initialize the seed, incremented for each object created + static int m_SeedCounter; +} ; + + + + -- cgit v1.2.3