source file of the GNU LilyPond music typesetter
- (c) 2000--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2000--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "spaceable-grob.hh"
#include <cstdio>
-#include <math.h>
#include "warn.hh"
#include "spring.hh"
// printf ("rod %lf\n", d);
if (d < 0)
return;
-
+
if (isinf (d))
programming_error ("infinite rod");
SCM mins = get_minimum_distances (me);
- SCM newdist = scm_make_real (d);
+ SCM newdist = scm_from_double (d);
for (SCM s = mins; scm_is_pair (s); s = scm_cdr (s))
{
SCM dist = scm_car (s);
}
if (Paper_column::get_rank (p) < Paper_column::get_rank (me))
- {
- programming_error ("Adding reverse rod");
- }
-
+ programming_error ("Adding reverse rod");
+
mins = scm_cons (scm_cons (p->self_scm (), newdist), mins);
me->set_object ("minimum-distances", mins);
}
void
-Spaceable_grob::add_spring (Grob *me, Grob *p, Real d, Real inverse_strength)
+Spaceable_grob::add_spring (Grob *me, Grob *other,
+ Real distance, Real inverse_strength)
{
- if (d <= 0.0 || inverse_strength < 0.0)
+ if (distance <= 0.0 || inverse_strength < 0.0)
{
programming_error ("adding reverse spring, setting to unit");
- d = 1.0;
+ distance = 1.0;
inverse_strength = 1.0;
}
- if (isinf (d) || isnan (d)
+ if (isinf (distance) || isnan (distance)
|| isnan (inverse_strength))
{
/* strength == INF is possible. It means fixed distance. */
programming_error ("insane distance found");
- d = 1.0;
+ distance = 1.0;
inverse_strength = 1.0;
}
for (SCM s = mins; scm_is_pair (s); s = scm_cdr (s))
{
Spring_smob *sp = unsmob_spring (scm_car (s));
- if (sp->other_ == p)
+ if (sp->other_ == other)
{
programming_error ("already have that spring");
return;
Spring_smob spring;
spring.inverse_strength_ = inverse_strength;
- spring.distance_ = d;
- spring.other_ = p;
+ spring.distance_ = distance;
+ spring.other_ = other;
SCM ideal = me->get_object ("ideal-distances");
ideal = scm_cons (spring.smobbed_copy (), ideal);
me->set_object ("ideal-distances", ideal);
}
+void
+Spaceable_grob::get_spring (Grob *me, Grob *other, Real *dist, Real *inv_strength)
+{
+ for (SCM s = me->get_object ("ideal-distances");
+ scm_is_pair (s); s = scm_cdr (s))
+ {
+ Spring_smob *spring = unsmob_spring (scm_car (s));
+ if (spring && spring->other_ == other)
+ {
+ *dist = spring->distance_;
+ *inv_strength = spring->inverse_strength_;
+ }
+ }
+}
+
void
Spaceable_grob::remove_interface (Grob *me)
{
me->set_object ("ideal-distances", SCM_EOL);
}
-ADD_INTERFACE (Spaceable_grob, "spaceable-grob-interface",
+ADD_INTERFACE (Spaceable_grob,
"A layout object that takes part in the spacing problem. ",
- "measure-length spacing-wishes penalty minimum-distances ideal-distances "
- "keep-inside-line left-neighbors right-neighbors");
+
+
+ /* properties */
+ "allow-loose-spacing "
+ "ideal-distances "
+ "keep-inside-line "
+ "left-neighbors "
+ "measure-length "
+ "minimum-distances "
+ "right-neighbors "
+ "spacing-wishes");