lily/spring.cc

   1 /*
   2   spring.cc --  implement Spring
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "spring.hh"
  11 #include "debug.hh"
  12 #include "item.hh"
  13 #include "paper-column.hh"
  14
  15 Spring::Spring ()
  16 {
  17   item_l_drul_[LEFT]  =item_l_drul_[RIGHT] =0;
  18   distance_f_ =0.;
  19   strength_f_ =1.0;
  20 }
  21
  22 void
  23 Spring::add_to_cols ()
  24 {
  25   Direction d = LEFT;
  26   do
  27     {
  28       item_l_drul_[-d]->column_l ()->add_spring
  29         (item_l_drul_[d]->column_l (),
  30          distance_f_, strength_f_);
  31     }
  32   while ((flip (&d))!=LEFT);
  33 }
  34
  35
  36 Column_spring::Column_spring ()
  37 {
  38   other_l_ = 0;
  39   distance_f_ =0;
  40   strength_f_ =1.0;
  41 }
  42
  43
  44 int
  45 Column_spring::compare (Column_spring const & r1, Column_spring const &r2)
  46 {
  47   return r1.other_l_->rank_i() - r2.other_l_->rank_i();
  48 }
  49
  50 void
  51 Column_spring::print () const
  52 {
  53 #ifndef NPRINT
  54   DEBUG_OUT << "Column_spring { rank = "
  55        << other_l_->rank_i () << ", dist = " << distance_f_ << "}\n";
  56
  57 #endif
  58 }