2003 -> 2004

[lilypond.git] / lily / spaceable-grob.cc

diff --git a/lily/spaceable-grob.cc b/lily/spaceable-grob.cc
index 2695186b5d6685278bf72d5119666a74f3dd330f..87df4b71543206ebdd07419e81fab2d7a0dca97e 100644 (file)
--- a/lily/spaceable-grob.cc
+++ b/lily/spaceable-grob.cc
@@ -3,9 +3,11 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 2000--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
+#include <stdio.h> 
+#include <math.h>
 
 #include "spaceable-grob.hh"
 #include "grob.hh"
@@ -24,6 +26,9 @@ 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))
@@ -44,11 +49,25 @@ Spaceable_grob::add_rod (Grob *me , Grob * p, Real d)
 void
 Spaceable_grob::add_spring (Grob*me, Grob * p, Real d, Real strength, bool expand_only)
 {
-  if (d < 0.0 || strength <= 0.0)
+  //  printf ("dist %lf, str %lf\n", d, strength); 
+  if (d <= 0.0 || strength <= 0.0)
     {
-      programming_error ("Adding reverse spring!");
+      programming_error ("Adding reverse spring! Setting to unit spring");
+      d = 1.0;
+      strength = 1.0;
     }
   
+  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))
@@ -63,8 +82,8 @@ Spaceable_grob::add_spring (Grob*me, Grob * p, Real d, Real strength, bool expan
 #endif
   
   Spring_smob spring;
-  spring.strength_f_ = strength;
-  spring.distance_f_ = d;
+  spring.strength_ = strength;
+  spring.distance_ = d;
   spring.expand_only_b_ = expand_only;
   spring.other_ = p;
   
@@ -75,13 +94,16 @@ Spaceable_grob::add_spring (Grob*me, Grob * p, Real d, Real strength, bool expan
 void
 Spaceable_grob::remove_interface (Grob*me)
 {
-  me->remove_grob_property ("minimum-distances");
-  me->remove_grob_property ("ideal-distances");
+  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");
+