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Use mean() and stddev().

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Glenn Maynard
2002-10-24 07:09:54 +00:00
parent 7437e1238b
commit e3e47e9417
1 changed files with 3 additions and 14 deletions
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stepmania/src/Player.cpp
+3 -14
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@@ -415,21 +415,10 @@ void Player::Step( int col )
m_fOffset[m_iOffsetSample++] = fNoteOffset; m_fOffset[m_iOffsetSample++] = fNoteOffset;
if (m_iOffsetSample >= SAMPLE_COUNT) if (m_iOffsetSample >= SAMPLE_COUNT)
{ {
float stddev = 0.0f, mean = 0.0f; float mean = calc_mean(m_fOffset, m_fOffset+SAMPLE_COUNT);
int i; float stddev = calc_stddev(m_fOffset, m_fOffset+SAMPLE_COUNT);
//calculate mean if (stddev < .03 && stddev < fabsf(mean)) { //If they stepped with less than .03 error
for( i=0; i<SAMPLE_COUNT; i++ )
mean += m_fOffset[i];
mean /= SAMPLE_COUNT;
//calculate stddev
for( i=0; i<SAMPLE_COUNT; i++ )
stddev += (m_fOffset[i] - mean) * (m_fOffset[i] - mean);
stddev /= SAMPLE_COUNT + 1; //yes, N+1. Really.
stddev = sqrtf(stddev);
if (stddev < .03 && stddev < fabsf(mean)) { //If they stepped with less than .025 error
GAMESTATE->m_pCurSong->m_fBeat0OffsetInSeconds += mean; GAMESTATE->m_pCurSong->m_fBeat0OffsetInSeconds += mean;
LOG->Trace("Offset corrected by %f. Error in steps: %f seconds.", mean, stddev); LOG->Trace("Offset corrected by %f. Error in steps: %f seconds.", mean, stddev);
} else } else