source file of the GNU LilyPond music typesetter
- (c) 2000--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2000--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
+#include <stdio.h>
+#include <math.h>
#include "spaceable-grob.hh"
#include "grob.hh"
#include "warn.hh"
+#include "spring.hh"
+#include "group-interface.hh"
SCM
Spaceable_grob::get_minimum_distances (Grob*me)
void
Spaceable_grob::add_rod (Grob *me , Grob * p, Real d)
{
+ // printf ("rod %lf\n", d);
+
+
SCM mins = get_minimum_distances (me);
SCM newdist = gh_double2scm (d);
for (SCM s = mins; gh_pair_p (s); s = ly_cdr (s))
}
void
-Spaceable_grob::add_spring (Grob*me, Grob * p, Real d, Real strength)
+Spaceable_grob::add_spring (Grob*me, Grob * p, Real d, Real strength, bool expand_only)
{
- SCM mins = me->get_grob_property ("ideal-distances");
-
+ // printf ("dist %lf, str %lf\n", d, strength);
+ if (d <= 0.0 || strength <= 0.0)
+ {
+ programming_error ("Adding reverse spring! Setting to unit spring");
+ d = 1.0;
+ strength = 1.0;
+ }
- SCM newdist= gh_double2scm (d);
+ if (isinf (d) || isnan(d)
+ || isnan (strength))
+ {
+ /*
+ strength == INF is possible. It means fixed distance.
+ */
+ programming_error ("Insane distance found.");
+ d = 1.0;
+ strength = 1.0;
+ }
+
+#ifndef NDEBUG
+ SCM mins = me->get_grob_property ("ideal-distances");
for (SCM s = mins; gh_pair_p (s); s = ly_cdr (s))
{
- SCM dist = ly_car (s);
- if (ly_car (dist) == p->self_scm ())
+ Spring_smob * sp = unsmob_spring(ly_car (s));
+ if (sp->other_ == p)
{
programming_error ("already have that spring");
return ;
}
}
- SCM newstrength= gh_double2scm (strength);
+#endif
- mins = gh_cons (gh_cons (p->self_scm (), gh_cons (newdist, newstrength)), mins);
- me->set_grob_property ("ideal-distances", mins);
+ Spring_smob spring;
+ spring.strength_ = strength;
+ spring.distance_ = d;
+ spring.expand_only_b_ = expand_only;
+ spring.other_ = p;
+
+ Group_interface::add_thing (me, ly_symbol2scm ("ideal-distances"), spring.smobbed_copy ());
}
void
Spaceable_grob::remove_interface (Grob*me)
{
- me->remove_grob_property ("minimum-distances");
- me->remove_grob_property ("ideal-distances");
- me->remove_grob_property ("dir-list");
+ me->set_grob_property ("minimum-distances" , SCM_EOL);
+ me->set_grob_property ("spacing-wishes", SCM_EOL);
+ me->set_grob_property ("ideal-distances", SCM_EOL);
}
-void
-Spaceable_grob::set_interface (Grob*me)
-{
- me->set_interface (ly_symbol2scm ("spaceable-grob-interface"));
-}
+
+ADD_INTERFACE (Spaceable_grob,"spaceable-grob-interface",
+ "A grob (a Paper_column) that takes part in the \n"
+ "spacing problem. ",
+ "measure-length spacing-wishes penalty minimum-distances ideal-distances "
+"left-neighbors right-neighbors");
+