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When Envelope domain is shortened, evaluation inside won't change...

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... It doesn't happen in practice yet, all present calls to SetTrackLen
make the track the same length or longer.  But this is for completeness.
This commit is contained in:
Paul Licameli 2017-05-04 08:56:51 -04:00
parent 945e411e2c
commit 2d84c65c94
1 changed files with 13 additions and 9 deletions
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22
src/Envelope.cpp
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@ -175,7 +175,7 @@ void Envelope::SetRange(double minValue, double maxValue) {
}
// This is used only during construction of an Envelope by complete or partial
// copy of another.
// copy of another, or when truncating a track.
void Envelope::AddPointAtEnd( double t, double val )
{
mEnv.push_back( EnvPoint{ t, val } );
@ -1037,16 +1037,20 @@ void Envelope::SetOffset(double newOffset)
}
void Envelope::SetTrackLen(double trackLen)
// NOFAIL-GUARANTEE
{
mTrackLen = trackLen;
// Preserve the right-side limit at trackLen.
bool needPoint = ( trackLen < mTrackLen );
double value;
if ( needPoint )
value = GetValueRelative( trackLen );
int len = mEnv.size();
for (int i = 0; i < len; i++)
if (mEnv[i].GetT() > mTrackLen) {
Delete(i);
len--;
i--;
}
mTrackLen = trackLen;
int newLen = EqualRange( trackLen, 0 ).second;
mEnv.resize( newLen );
if ( needPoint )
AddPointAtEnd( mTrackLen, value );
}
void Envelope::RescaleTimes( double newLength )