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precise, framerate-independent assist ticks

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This commit is contained in:
Glenn Maynard
2004-01-12 09:36:01 +00:00
parent 987db137cc
commit fea54929ac
4 changed files with 91 additions and 56 deletions
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stepmania/src/ScreenEdit.cpp
+28 -21
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@@ -358,33 +358,40 @@ ScreenEdit::~ScreenEdit()
}
// play assist ticks
bool ScreenEdit::PlayTicks() const
void ScreenEdit::PlayTicks()
{
// Sound cards have a latency between when a sample is Play()ed and when the sound
// will start coming out the speaker. Compensate for this by boosting
// fPositionSeconds ahead
if( !GAMESTATE->m_SongOptions.m_bAssistTick )
return false;
if( !GAMESTATE->m_SongOptions.m_bAssistTick || m_EditMode != MODE_PLAYING )
return;
/* Sound cards have a latency between when a sample is Play()ed and when the sound
* will start coming out the speaker. Compensate for this by boosting fPositionSeconds
* ahead. This is just to make sure that we request the sound early enough for it to
* come out on time; the actual precise timing is handled by SetStartTime. */
float fPositionSeconds = GAMESTATE->m_fMusicSeconds;
fPositionSeconds += SOUND->GetPlayLatency() + (float)TICK_EARLY_SECONDS + 0.250f;
const float fSongBeat = GAMESTATE->m_pCurSong->GetBeatFromElapsedTime( fPositionSeconds );
// HACK: Play the sound a little bit early to account for the fact that the middle of the tick sounds occurs 0.015 seconds into playing.
fPositionSeconds += (SOUND->GetPlayLatency()+(float)TICK_EARLY_SECONDS) * m_soundMusic.GetPlaybackRate();
float fSongBeat=GAMESTATE->m_pCurSong->GetBeatFromElapsedTime( fPositionSeconds );
int iRowNow = BeatToNoteRowNotRounded( fSongBeat );
iRowNow = max( 0, iRowNow );
const int iSongRow = max( 0, BeatToNoteRowNotRounded( fSongBeat ) );
static int iRowLastCrossed = 0;
bool bAnyoneHasANote = false; // set this to true if any player has a note at one of the indicies we crossed
int iTickRow = -1;
for( int r=iRowLastCrossed+1; r<=iSongRow; r++ ) // for each index we crossed since the last update
if( m_Player.IsThereATapOrHoldHeadAtRow( r ) )
iTickRow = r;
for( int r=iRowLastCrossed+1; r<=iRowNow; r++ ) // for each index we crossed since the last update
bAnyoneHasANote |= m_Player.IsThereATapOrHoldHeadAtRow( r );
iRowLastCrossed = iSongRow;
iRowLastCrossed = iRowNow;
if( iTickRow != -1 )
{
const float fTickBeat = NoteRowToBeat( iTickRow );
const float fTickSecond = GAMESTATE->m_pCurSong->m_Timing.GetElapsedTimeFromBeat( fTickBeat );
float fSecondsUntil = fTickSecond - GAMESTATE->m_fMusicSeconds;
fSecondsUntil /= m_soundMusic.GetPlaybackRate(); /* 2x music rate means the time until the tick is halved */
return bAnyoneHasANote;
RageTimer when = GAMESTATE->m_LastBeatUpdate + (fSecondsUntil - (float)TICK_EARLY_SECONDS);
m_soundAssistTick.SetStartTime( when );
m_soundAssistTick.Play();
}
}
void ScreenEdit::PlayPreviewMusic()
@@ -492,8 +499,7 @@ void ScreenEdit::Update( float fDeltaTime )
m_NoteFieldEdit.Update( fDeltaTime );
if(m_EditMode == MODE_PLAYING && PlayTicks())
m_soundAssistTick.Play();
PlayTicks();
static float fUpdateCounter = 0;
fUpdateCounter -= fDeltaTime;
@@ -1198,6 +1204,7 @@ void ScreenEdit::TransitionToEdit()
{
m_EditMode = MODE_EDITING;
m_soundMusic.StopPlaying();
m_soundAssistTick.StopPlaying(); /* Stop any queued assist ticks. */
m_rectRecordBack.StopTweening();
m_rectRecordBack.BeginTweening( 0.5f );
m_rectRecordBack.SetDiffuse( RageColor(0,0,0,0) );