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Envelope::InsertSpace preserves limiting values of the split point

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This commit is contained in:
Paul Licameli 2017-05-06 00:31:43 -04:00
parent 8c4dc38047
commit a9160cf803
1 changed files with 26 additions and 6 deletions
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32
src/Envelope.cpp
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@ -909,17 +909,37 @@ void Envelope::RemoveUnneededPoints(double time, double tolerence)
}
}
void Envelope::InsertSpace(double t0, double tlen)
void Envelope::InsertSpace( double t0, double tlen )
// NOFAIL-GUARANTEE
{
t0 -= mOffset;
unsigned int len = mEnv.size();
unsigned int i;
// Preserve the left-side limit at the split.
auto val = GetValueRelative( t0 );
auto range = EqualRange( t0, 0 );
size_t index;
if ( range.first < range.second )
// There is already a control point.
index = 1 + range.first;
else
// Make a control point.
index = 1 + InsertOrReplaceRelative( t0, val );
// Shift points.
auto len = mEnv.size();
for ( ; index < len; ++index ) {
auto &point = mEnv[ index ];
point.SetT( point.GetT() + tlen );
}
// Preserve the right-side limit.
if ( 1 + range.first < range.second )
// There was a control point already.
;
else
InsertOrReplaceRelative( t0 + tlen, val );
for (i = 0; i < len; i++)
if (mEnv[i].GetT() > t0)
mEnv[i].SetT(mEnv[i].GetT() + tlen);
mTrackLen += tlen;
}