lily/include/scale.hh

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2006--2010 Han-Wen Nienhuys <hanwen@lilypond.org>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #ifndef SCALE_HH
  21 #define SCALE_HH
  22
  23 #include "smobs.hh"
  24 #include "rational.hh"
  25 #include "std-vector.hh"
  26
  27 struct Scale
  28 {
  29 public:
  30   Scale (vector<Rational> const&);
  31   Scale (Scale const&);
  32
  33   Rational tones_at_step (int step, int octave) const;
  34   Rational step_size (int step) const;
  35   int step_count () const;
  36   int normalize_step (int step) const;
  37
  38   DECLARE_SMOBS (Scale);
  39
  40 private:
  41   vector<Rational> step_tones_;
  42 };
  43
  44 extern Scale *default_global_scale;
  45
  46 #endif /* SCALE_HH */
  47
  48