source file of the GNU LilyPond music typesetter
- (c) 1999--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1999--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
TODO:
- add support for different stretch/shrink constants?
#include <math.h>
#include <libc-extension.hh> // isinf
-#include "string-convert.hh"
#include "simple-spacer.hh"
#include "paper-column.hh"
#include "spring.hh"
Simple_spacer::Simple_spacer ()
{
+ active_count_ = 0;
force_f_ = 0.;
indent_f_ =0.0;
default_space_f_ = 20 PT;
// safe, since
// force is only copied.
for (int i=0 ; i <springs_.size (); i++)
- if (springs_[i].block_force_f_ >= force_f_)
- springs_[i].active_b_ = false;
+ if (springs_[i].active_b_
+ && springs_[i].block_force_f_ >= force_f_)
+ {
+ springs_[i].active_b_ = false;
+ active_count_ --;
+ }
}
Real
bool
Simple_spacer::active_b () const
{
- for (int i=0; i < springs_.size (); i++)
- if (springs_[i].active_b_)
- return true;
- return false;
+ return active_count_;
}
void
}
void
-Simple_spacer::add_columns (Link_array<Item> cols)
+Simple_spacer::add_columns (Link_array<Grob> cols)
{
- for (int i =0; i < cols.size (); i++)
- all_cols_.push ( dynamic_cast<Item*> (cols[i]));
-
- Grob *next = 0;
+ for (int i = cols.size (); i--;)
+ if (gh_pair_p (cols[i]->get_grob_property ("between-cols")))
+ {
+ loose_cols_.push (cols[i]);
+ cols.del (i);
+ }
+
+ spaced_cols_ = cols;
for (int i=0; i < cols.size () - 1; i++)
{
- SCM spring_params = SCM_UNDEFINED;
-
- if (next && cols[i] != next)
- continue;
-
+ SCM spring_params = SCM_EOL;
for (SCM s = cols[i]->get_grob_property ("ideal-distances");
!gh_pair_p (spring_params) && gh_pair_p (s);
- s = gh_cdr (s))
+ s = ly_cdr (s))
{
- Grob *other = unsmob_grob (gh_caar (s));
- int j = i+1;
- for (; j < cols.size (); j++)
- if (cols[j] == other)
- break;
-
- if(j == cols.size ())
+ Grob *other = unsmob_grob (ly_caar (s));
+ if (other != cols[i+1])
continue;
- next = other;
- spring_params = gh_cdar (s);
+ spring_params = ly_cdar (s);
}
Spring_description desc;
- desc.ideal_f_ = -1;
- if (gh_pair_p(spring_params))
+ if (gh_pair_p (spring_params))
{
- desc.ideal_f_ = gh_scm2double (gh_car (spring_params));
- desc.hooke_f_ = gh_scm2double (gh_cdr (spring_params));
+ desc.ideal_f_ = gh_scm2double (ly_car (spring_params));
+ desc.hooke_f_ = gh_scm2double (ly_cdr (spring_params));
}
-
- if (gh_pair_p (spring_params) && desc.sane_b ())
+ else
{
- spaced_cols_.push (dynamic_cast<Item*> (cols[i]));
- desc.block_force_f_ = - desc.hooke_f_ * desc.ideal_f_; // block at distance 0
- springs_.push (desc);
+ programming_error (_f("No spring between column %d and next one",
+ Paper_column::rank_i (cols[i])
+ ));
+ desc.hooke_f_ = 1.0;
+ desc.ideal_f_ = default_space_f_;
}
- else if (gh_pair_p (spring_params) && !desc.sane_b ())
+
+ if (!desc.sane_b ())
{
- programming_error (String_convert::form_str ("insane springs at col %d", Paper_column::rank_i (cols[i])));
- // Generate rods for these cols.
+ programming_error ("Insane spring found. Setting to unit spring.");
+
+ cout << "columns " << Paper_column::rank_i (cols[i])
+ << " " << Paper_column::rank_i (cols[i+1]) << endl;
+ desc.hooke_f_ = 1.0;
+ desc.ideal_f_ = 1.0;
}
+
+ desc.block_force_f_ = - desc.hooke_f_ * desc.ideal_f_; // block at distance 0
+ springs_.push (desc);
+ active_count_ ++;
}
-
- spaced_cols_.push (all_cols_.top ());
- for (int i=0; i < spaced_cols_.size () - 1; i++)
+ for (int i=0; i < cols.size () - 1; i++)
{
- for (SCM s = Spaceable_grob::get_minimum_distances (spaced_cols_[i]);
- gh_pair_p (s); s = gh_cdr (s))
+ for (SCM s = Spaceable_grob::get_minimum_distances (cols[i]);
+ gh_pair_p (s); s = ly_cdr (s))
{
- Item * other = dynamic_cast<Item*> (unsmob_grob (gh_caar (s)));
- int oi = spaced_cols_.find_i (other);
+ Grob * other = unsmob_grob (ly_caar (s));
+ int oi = cols.find_i (other);
if (oi >= 0)
{
- add_rod (i, oi, gh_scm2double (gh_cdar (s)));
+ add_rod (i, oi, gh_scm2double (ly_cdar (s)));
}
}
}
{
positions->config_.push (positions->config_.top () + springs_[i].length (force_f_));
}
-
- positions->satisfies_constraints_b_ = (line_len_f_ < 0) || active_b ();
positions->cols_ = spaced_cols_;
- do_wide_springs (positions);
-}
-
-/*
- Do the columns whose springs didn't paricipate in the spacing process
- */
-void
-Simple_spacer::do_wide_springs ( Column_x_positions *positions_)const
-{
- int i = 0;
+ positions->loose_cols_ = loose_cols_;
+
+ positions->satisfies_constraints_b_ = (line_len_f_ < 0) || active_b ();
- Array<Real> all_posns;
- for (int j = 0; j < all_cols_.size () && i < spaced_cols_.size (); j++)
+ /*
+ Check if breaking constraints are met.
+ */
+ bool break_satisfy = true;
+ int sz = positions->cols_.size ();
+ for (int i = sz; i--; )
{
- if (all_cols_[j] == spaced_cols_[i])
- {
- all_posns.push (positions_->config_[i] );
- i++;
- continue;
- }
-
-
- SCM between = all_cols_[j]->get_grob_property ("between-cols");
- if (!gh_pair_p (between))
+ SCM p = positions->cols_[i]->get_grob_property( "penalty");
+ if (gh_number_p (p))
{
- programming_error (String_convert::form_str ("loose column rank %d not beween spaced cols", Paper_column::rank_i (all_cols_[j] )));
- all_posns.push (positions_->config_[i]);
- continue;
+ if (gh_scm2double (p) < -9999)
+ break_satisfy = break_satisfy && (i == 0 || i == sz -1);
+ if (gh_scm2double (p) > 9999)
+ break_satisfy = break_satisfy && !(i == 0 || i == sz -1);
}
- Item * prev = dynamic_cast<Item*> (unsmob_grob (gh_car (between)));
- Item *next = dynamic_cast<Item*> (unsmob_grob (gh_cdr (between)));
- int ip = i;
- int in = i;
- for (; ip--; )
- if(spaced_cols_[ip] == prev)
- break;
-
- for (; in < spaced_cols_.size (); in++)
- if(spaced_cols_[in] == next)
- break;
-
- // TODO: compute iso. 0.5
- if (ip >= 0 && in < positions_->config_.size ())
- all_posns.push (0.5 * (positions_->config_[ip] + positions_->config_[in]));
- else
- all_posns.push (positions_->config_[i]);
-
}
- positions_->config_ = all_posns;
- positions_->cols_ = all_cols_;
+ positions->satisfies_constraints_b_ =
+ positions->satisfies_constraints_b_ && break_satisfy;
}
+
+
+
Spring_description::Spring_description ()
{
ideal_f_ =0.0;
projects / lilypond.git / blobdiff