/* |
File: TRandom.cpp |
Abstract: TRandom.h |
Version: 1.0.1 |
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*/ |
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
// TRandom.cpp |
// |
// a random number generator |
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
|
#include "TRandom.h" |
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
// TRandom::TRandom |
// |
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
TRandom::TRandom() |
{ |
Seed(12345); |
} |
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
// TRandom::Seed |
// |
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
void TRandom::Seed(UInt32 j) |
{ |
UInt32 k = 1; |
mTable[54] = j; |
long i; |
for (i = 0; i < 54; i++) |
{ |
long ii = 21 * i % 55; |
mTable[ii] = k; |
k = j - k; |
j = mTable[ii]; |
} |
for (int loop = 0; loop < 4; loop++) |
{ |
for (i = 0; i < 55; i++) |
mTable[i] = mTable[i] - mTable[(1 + i + 30) % 55]; |
} |
mIndex1 = 0; |
mIndex2 = 31; |
} |
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
#pragma mark ____EasyFunctions |
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static TRandom *sGenerator = NULL; |
|
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
// GetRandomLong |
// |
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
UInt32 GetRandomLong(UInt32 inRange) |
{ |
if (sGenerator == NULL) |
sGenerator = new TRandom(kRandomSeed); |
return (*sGenerator)(inRange); |
} |
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
// GetRandomLong |
// |
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
UInt32 GetRandomLong(UInt32 inLowerLimit, UInt32 inUpperLimit ) |
{ |
UInt32 value = GetRandomLong(inUpperLimit - inLowerLimit ); |
|
return value + inLowerLimit; |
} |
