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Fixed cFastRandom Test. (#3291)

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This resolves #3290
This commit is contained in:
Alexander Harkness
2016-08-03 08:35:42 +01:00
committed by Mattes D
parent 38368f361d
commit 58b29adc88
4 changed files with 116 additions and 72 deletions
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72
src/FastRandom.cpp
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@@ -37,74 +37,6 @@ static unsigned int GetRandomSeed()
////////////////////////////////////////////////////////////////////////////////
// cFastRandom:
#if 0 && defined(_DEBUG)
// Self-test
// Both ints and floats are quick-tested to see if the random is calculated correctly, checking the range in ASSERTs,
// and if it performs well in terms of distribution (checked by avg, expected to be in the range midpoint
class cFastRandomTest
{
public:
cFastRandomTest(void)
{
TestInts();
TestFloats();
}
void TestInts(void)
{
printf("Testing ints...\n");
cFastRandom rnd;
int sum = 0;
const int BUCKETS = 8;
int Counts[BUCKETS];
memset(Counts, 0, sizeof(Counts));
const int ITER = 10000;
for (int i = 0; i < ITER; i++)
{
int v = rnd.NextInt(1000);
ASSERT(v >= 0);
ASSERT(v < 1000);
Counts[v % BUCKETS]++;
sum += v;
}
double avg = (double)sum / ITER;
printf("avg: %f\n", avg);
for (int i = 0; i < BUCKETS; i++)
{
printf(" bucket %d: %d\n", i, Counts[i]);
}
}
void TestFloats(void)
{
printf("Testing floats...\n");
cFastRandom rnd;
float sum = 0;
const int BUCKETS = 8;
int Counts[BUCKETS];
memset(Counts, 0, sizeof(Counts));
const int ITER = 10000;
for (int i = 0; i < ITER; i++)
{
float v = rnd.NextFloat(1000);
ASSERT(v >= 0);
ASSERT(v <= 1000);
Counts[((int)v) % BUCKETS]++;
sum += v;
}
sum = sum / ITER;
printf("avg: %f\n", sum);
for (int i = 0; i < BUCKETS; i++)
{
printf(" bucket %d: %d\n", i, Counts[i]);
}
}
} g_Test;
#endif
@@ -187,7 +119,3 @@ double MTRand::rand(double a_Range)
std::uniform_real_distribution<> distribution(0, a_Range);
return distribution(m_MersenneRand);
}