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simplify NoteDataUtil::shuffle

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This commit is contained in:
Glenn Maynard
2004-07-01 18:32:19 +00:00
parent 99688d485d
commit 30aeffc63a
1 changed files with 7 additions and 22 deletions
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stepmania/src/NoteDataUtil.cpp
+7 -22
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@@ -554,31 +554,16 @@ static void GetTrackMapping( StepsType st, NoteDataUtil::TrackMapping tt, int Nu
{
// TRICKY: Shuffle so that both player get the same shuffle mapping
// in the same round.
int iOrig[MAX_NOTE_TRACKS];
memcpy( iOrig, iTakeFromTrack, sizeof(iOrig) );
int iShuffleSeed = GAMESTATE->m_iRoundSeed;
reshuffle:
RandomGen rnd( iShuffleSeed );
vector<int> aiTracksLeftToMap;
for( t=0; t<NumTracks; t++ )
aiTracksLeftToMap.push_back( t );
bool bIsIdentity = true;
for( t=0; t<NumTracks; t++ )
{
int iRandTrackIndex = rnd( aiTracksLeftToMap.size() );
int iRandTrack = aiTracksLeftToMap[iRandTrackIndex];
aiTracksLeftToMap.erase( aiTracksLeftToMap.begin()+iRandTrackIndex,
aiTracksLeftToMap.begin()+iRandTrackIndex+1 );
iTakeFromTrack[t] = iRandTrack;
if( iTakeFromTrack[t] != t )
bIsIdentity = false;
}
if( bIsIdentity )
{
do {
RandomGen rnd( iShuffleSeed );
random_shuffle( &iTakeFromTrack[0], &iTakeFromTrack[NumTracks], rnd );
iShuffleSeed++;
goto reshuffle;
}
while ( !memcmp( iOrig, iTakeFromTrack, sizeof(iOrig) ) );
}
break;
case NoteDataUtil::stomp: