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experimental time signature support. Background changes and beat bars are currently the only things that are aware of time signature. Note coloring isn't aware of time signature yet.

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This commit is contained in:
Chris Danford
2007-04-30 05:12:48 +00:00
parent e5dd10fbef
commit d2f6f8e03f
18 changed files with 314 additions and 69 deletions
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stepmania/src/Background.cpp
+30 -12
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@@ -433,30 +433,48 @@ BackgroundDef BackgroundImpl::Layer::CreateRandomBGA( const Song *pSong, const R
void BackgroundImpl::LoadFromRandom( float fFirstBeat, float fEndBeat, const BackgroundChange &change )
{
int iStartRow = BeatToNoteRow(fFirstBeat);
int iEndRow = BeatToNoteRow(fEndBeat);
const TimingData &timing = m_pSong->m_Timing;
// change BG every 4 bars
for( float f=fFirstBeat; f<fEndBeat; f+=BEATS_PER_MEASURE*4 )
// change BG every time signature change or 4 measures
FOREACH_CONST( TimeSignatureSegment, timing.m_vTimeSignatureSegments, iter )
{
// Don't fade. It causes frame rate dip, especially on slower machines.
BackgroundDef bd = m_Layer[0].CreateRandomBGA( m_pSong, change.m_def.m_sEffect, m_RandomBGAnimations, this );
if( !bd.IsEmpty() )
vector<TimeSignatureSegment>::const_iterator next = iter;
next++;
int iSegmentEndRow = (next == timing.m_vTimeSignatureSegments.end()) ? iEndRow : next->m_iStartRow;
for( int i=max(iter->m_iStartRow,iStartRow); i<min(iEndRow,iSegmentEndRow); i+=iter->GetNoteRowsPerMeasure() )
{
BackgroundChange c = change;
c.m_def = bd;
c.m_fStartBeat = f;
m_Layer[0].m_aBGChanges.push_back( c );
// Don't fade. It causes frame rate dip, especially on slower machines.
BackgroundDef bd = m_Layer[0].CreateRandomBGA( m_pSong, change.m_def.m_sEffect, m_RandomBGAnimations, this );
if( !bd.IsEmpty() )
{
BackgroundChange c = change;
c.m_def = bd;
c.m_fStartBeat = NoteRowToBeat(i);
m_Layer[0].m_aBGChanges.push_back( c );
}
}
}
// change BG every BPM change that is at the beginning of a measure
int iStartRow = BeatToNoteRow(fFirstBeat);
int iEndRow = BeatToNoteRow(fEndBeat);
for( unsigned i=0; i<timing.m_BPMSegments.size(); i++ )
{
const BPMSegment& bpmseg = timing.m_BPMSegments[i];
if( bpmseg.m_iStartRow % BeatToNoteRow((float) BEATS_PER_MEASURE) != 0 )
bool bAtBeginningOfMeasure = false;
FOREACH_CONST( TimeSignatureSegment, timing.m_vTimeSignatureSegments, iter )
{
if( (bpmseg.m_iStartRow - iter->m_iStartRow) % iter->GetNoteRowsPerMeasure() == 0 )
{
bAtBeginningOfMeasure = true;
break;
}
}
if( !bAtBeginningOfMeasure )
continue; // skip
// start so that we don't create a BGChange right on top of fEndBeat