Method SetTrackLen

libraries/lib-mixer/Envelope.cpp:832–852

! @excsafety{No-fail} */

/*! @excsafety{No-fail} */
void Envelope::SetTrackLen( double trackLen, double sampleDur )
{
   // Preserve the left-side limit at trackLen.
   auto range = EqualRange( trackLen, sampleDur );
   bool needPoint = ( range.first == range.second && trackLen < mTrackLen );
   double value=0.0;
   if ( needPoint )
      value = GetValueRelative( trackLen );

   mTrackLen = trackLen;

   // Shrink the array.
   // If more than one point already at the end, keep only the first of them.
   int newLen = std::min( 1 + range.first, range.second );
   mEnv.resize( newLen );

   ++mVersion;

   if ( needPoint )
      AddPointAtEnd( mTrackLen, value );
}

/*! @excsafety{No-fail} */
void Envelope::RescaleTimes( double newLength )