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- attempt to use streflop for random number generation to fix AI synch issues on corss platform

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This commit is contained in:
Mark Vejvoda
2010-06-01 00:32:24 +00:00
parent 22439457b4
commit b8a05be21e
3 changed files with 63 additions and 13 deletions
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35
source/shared_lib/sources/util/randomgen.cpp
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@@ -1,6 +1,6 @@
#include "randomgen.h"
#include <cassert>
#include "util.h"
#include "leak_dumper.h"
namespace Shared { namespace Util {
@@ -15,30 +15,61 @@ const int RandomGen::b= 150889;
RandomGen::RandomGen(){
lastNumber= 0;
//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] lastNumber = %d\n",__FILE__,__FUNCTION__,__LINE__,lastNumber);
}
void RandomGen::init(int seed){
#ifdef STREFLOP_H
lastNumber = math::RandomInit(seed); // streflop
#else
lastNumber= seed % m;
#endif
//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] seed = %d, lastNumber = %d\n",__FILE__,__FUNCTION__,__LINE__,seed,lastNumber);
}
int RandomGen::rand(){
int RandomGen::rand() {
//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] lastNumber = %d\n",__FILE__,__FUNCTION__,__LINE__,lastNumber);
lastNumber= (a*lastNumber + b) % m;
//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] lastNumber = %d\n",__FILE__,__FUNCTION__,__LINE__,lastNumber);
return lastNumber;
}
int RandomGen::randRange(int min, int max){
assert(min<=max);
#ifdef STREFLOP_H
int res = math::Random<true, false, float>(min, max); // streflop
#else
int diff= max-min;
int res= min + static_cast<int>(static_cast<float>(diff+1)*RandomGen::rand() / m);
#endif
assert(res>=min && res<=max);
//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] min = %d, max = %d, res = %d\n",__FILE__,__FUNCTION__,__LINE__,min,max,res);
return res;
}
float RandomGen::randRange(float min, float max){
assert(min<=max);
#ifdef STREFLOP_H
float res = math::Random<true, false, float>(min, max); // streflop
#else
float rand01= static_cast<float>(RandomGen::rand())/(m-1);
float res= min+(max-min)*rand01;
#endif
assert(res>=min && res<=max);
//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] min = %f, max = %f, res = %f\n",__FILE__,__FUNCTION__,__LINE__,min,max,res);
return res;
}