/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 1997--2009 Jan Nieuwenhuizen <janneke@gnu.org>
+ Copyright (C) 1997--2011 Jan Nieuwenhuizen <janneke@gnu.org>
LilyPond is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
if (dynamics_.size () <= 1)
{
- programming_error ("(de)crescendo on items with specified volume.");
+ programming_error ("Impossible or ambiguous (de)crescendo in MIDI.");
return ;
}
-
+
Real delta_v = grow_dir_ * 0.1;
-
+
Real start_v = dynamics_[0]->volume_;
if (dynamics_.back ()->volume_ < 0)
dynamics_.back ()->volume_ = max (min (start_v + grow_dir_ * 0.25, 1.0), 0.1);
Moment start = dynamics_[0]->get_column ()->when ();
Real total_t = moment_to_real (dynamics_.back ()->get_column ()->when () - start);
-
+
for (vsize i = 1; i < dynamics_.size (); i ++)
{
Moment dt_moment = dynamics_[i]->get_column ()->when ()
- start;
Real dt = moment_to_real (dt_moment);
-
+
Real v = start_v + delta_v * (dt / total_t);
- dynamics_[i]->volume_ = v;
+ dynamics_[i]->volume_ = v;
}
}