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Use references rather than pointers.

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This commit is contained in:
Steve Checkoway
2006-12-28 02:38:56 +00:00
parent 0c711f840a
commit 23645ba30b
3 changed files with 11 additions and 15 deletions
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stepmania/src/RageUtil.cpp
+8 -10
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@@ -1000,10 +1000,8 @@ float calc_stddev( const float *pStart, const float *pEnd, bool bSample )
}
bool CalcLeastSquares( const vector< pair<float, float> > &vCoordinates,
float *pfSlope, float *pfIntercept, float *pfError )
float &pfSlope, float &pfIntercept, float &pfError )
{
ASSERT( pfSlope != NULL );
ASSERT( pfIntercept != NULL );
int iNumSamples = vCoordinates.size();
float fNumSamples = static_cast<float>(iNumSamples);
if( iNumSamples == 0 )
@@ -1019,17 +1017,17 @@ bool CalcLeastSquares( const vector< pair<float, float> > &vCoordinates,
fSumY += vCoordinates[i].second;
}
float fDenominator = fNumSamples * fSumXX - fSumX * fSumX;
*pfSlope = (fNumSamples * fSumXY - fSumX * fSumY) / fDenominator;
*pfIntercept = (fSumXX * fSumY - fSumX * fSumXY) / fDenominator;
pfSlope = (fNumSamples * fSumXY - fSumX * fSumY) / fDenominator;
pfIntercept = (fSumXX * fSumY - fSumX * fSumXY) / fDenominator;
*pfError = 0.0f;
pfError = 0.0f;
for( int i = 0; i < iNumSamples; ++i )
{
float fOneError = (vCoordinates[i].second - (*pfIntercept + *pfSlope * vCoordinates[i].first));
*pfError += fOneError * fOneError;
float fOneError = (vCoordinates[i].second - (pfIntercept + pfSlope * vCoordinates[i].first));
pfError += fOneError * fOneError;
}
*pfError /= fNumSamples;
*pfError = sqrtf( *pfError );
pfError /= fNumSamples;
pfError = sqrtf( pfError );
return true;
}