From 8f9585b9c115affed48b272d158796b46f6379c8 Mon Sep 17 00:00:00 2001
From: fred <fred>
Date: Tue, 26 Mar 2002 22:14:59 +0000
Subject: [PATCH] lilypond-1.1.57

---
 NEWS                          |  28 +++
 TODO                          |  93 +++++++-
 input/star-spangled-banner.ly |  42 +++-
 lily/beam.cc                  |  14 +-
 lily/bow.cc                   |  17 +-
 lily/encompass-info.cc        |  53 +++--
 lily/include/slur.hh          |   4 -
 lily/misc.cc                  |   2 +-
 lily/slur.cc                  | 395 +++++++++++++++-------------------
 lily/spanner.cc               |   1 -
 ly/params.ly                  |  18 +-
 11 files changed, 390 insertions(+), 277 deletions(-)

diff --git a/NEWS b/NEWS
index f2193e35fd..2a01616cca 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,31 @@
+pl 56.jcn3
+	- slur de-hairification
+	  * slurs always attached to noteheads, by default
+	  * corrections for steep and high slurs
+	  * snap to stem end when close
+	- bow/tie/slur dy/dx fix
+
+pl 56.hwn1
+	- some spacing tweaks.
+ 	- bf: two repeats + alts after each other.
+pl 56.jcn2
+	- tie: bfs + even simpler
+
+pl 56.jcn1
+	- bf: re-added \textflat,sharp to fix chords...
+	- bf: chord-modifier and mandatory dot: c-maj5 
+	- tutorial chord fixes
+	- tie fixes and boldifying:
+	  * removed sloping (dy!=0) code
+	  * use actual note-widths
+	  * y[left] == y[right]
+	  * follow OSU rules, I hope (from comments in text -- must check)
+	  * undetermined direction -> down; inverse of stem
+	- bf: beam: undetermined direction -> up; like stem
+	- slur-symmetry fixes
+	- fix for \rhythm and seq_iter childs (still crude, but more effective)
+*********
+
 pl 55.uu1
 	- use GS' anti aliasing
 
diff --git a/TODO b/TODO
index 3939b22ad5..e95bd85eda 100644
--- a/TODO
+++ b/TODO
@@ -9,7 +9,6 @@ Most of the items are marked in the code as well
 Grep for TODO and ugh/ugr/urg.  
 
 .* TODO before 1.2
-. * rename abc2ly mup2ly
 . * rename 'staff_line_leading' (who is being lead where?) to
 staff_space, interline; (or other meaningful name) and use throughout lily
 . * rename files to class-name:
@@ -18,7 +17,29 @@ staff_space, interline; (or other meaningful name) and use throughout lily
 .  * p-score
 .  * engraver-group
 . * standardise(d) switches: -v, --version; -d, --debug,
-. * Auto_beam debugging output (waarom/wanneer heb jij die weggehaald?)
+. * Peter    1.  Key signatures are no longer transposed with the rest
+    of
+        the music.
+
+                \notes\transpose bes  {\key D; d1 }
+        should produce no key signature (key C)
+
+        2.  Crescendos and other dynamic markings that start inside a
+        \grace { } section are ignored.
+
+        \notes \relative c' { fis4 r4   \grace { [g16 ( \<   a16] }
+        ) b4 \! a8. g16}
+
+        3.  Slurs that end within a grace section but start outside
+        are treated strangely.
+        a2 d,4 ( \grace { [e16 ) d16]} cis8 d
+
+
+        4.  Lyrics and grace sections don't go too well together.
+        The words are aligned with the main note, not the start of the
+        grace note.  This is usually wrong, but is sometimes right.
+
+
 . * Auto_beam debugging output (waarom/wanneer heb jij die weggehaald?)
 .  * Rename illegal to invalid
 .  * Mats:
@@ -51,11 +72,68 @@ staff_space, interline; (or other meaningful name) and use throughout lily
 
 - The paper11/13/26 files have to be updated.
 . * Grace_slur_engraver.
+. * input/star-spangled-banner.ly: fold for lyrics?
 . * Break_req handling is silly (break_forbid () + \break fucks up.)
 . * hangOnClef with non-breakable clefs.
 . * do scaled fonts generally 
 . * fix partial measures in meaningful way.
+. * Michael
+
+- The two spacing bugs in the choral-1.ly I sent you earlier, small
+GIFs attached for easy reference: #1: time meter and first note on the
+line are too close; #2: last note on the line and next bar are too
+close.
+
+- And I haven't got any feedback on this one, posted last week:
+
+Check out:
+
+\score {
+  \notes \relative c' {
+    \context Staff <
+      \context Voice = one { \stemdown c1 c4 }
+      \context Voice = two { \stemup d1 d4 }
+    >
+  }
+}
+
+Notes are shifted as expected. Now check out:
+
+\score {
+  \notes \relative c' {
+    \context Staff <
+      \context Voice = one { \stemdown c1 <a4 c4> }
+      \context Voice = two { \stemup d1 d4 }
+    >
+  }
+}
+
+i.e. do 
+
+-      \context Voice = one { \stemdown c1 c4 }
++      \context Voice = one { \stemdown c1 <a4 c4> }
+
+Now the chord collides with the note of the other voice!
+
 . * relative mode for midi2ly
+. * 
+Crescendi/diminuendi that cross a line break lose their vertical
+position and all end up above the top staff line, see the 
+following example.
+
+----------------
+\score{
+  \context StaffGroup <
+    \context Staff=s1 \notes\relative c'{
+      c d e f | 
+      g f e d | \break %% If this break is removed, it works fine
+      c d e f |}
+    \context Staff=s2 \notes\relative c'{
+      c \< d e f | 
+      g f e d | 
+      c d e \! f |}
+  >
+}
 . * uniformise recent feta contributions.
 .  * bigger and fatter 4/4 C
 . * sort out directory stuff.
@@ -81,6 +159,7 @@ GNU LilyPond 1.1.54.
 [/home/fred/usr/src/lilypond/scm/lily.scm]
 warning: can't find file: `init'
 . * indent = 0.0 with linewidth=-1.0
+. * collisions & accidentals.
 . * auto-beaming in input/test/spacing.ly.
 huh, snap niks van: gewone beam gaat wel goed.  hoe kan abe nu
 invloed hebben op beam-creatie, stopt toch gewoon stokken in?
@@ -107,7 +186,6 @@ invloed hebben op beam-creatie, stopt toch gewoon stokken in?
 . * Beam
 . * Stem
 . * Rhythmic_column and interaction stem/rhythmic_column/note_head/dots.
-. * Slur
 . * Duration
 . * clef engraver 
 . * parser
@@ -562,3 +640,12 @@ hesitate to ask.
  
 (require 'allout)
 (outline-init 't)
+
++ pl 56.jcn3
++ 	- slur de-hairification
++ 	  * slurs always attached to noteheads, by default
++ 	  * corrections for steep and high slurs
++ 	  * snap to stem end when close
++ 	- bow/tie/slur dy/dx fix
++ 
++ 
diff --git a/input/star-spangled-banner.ly b/input/star-spangled-banner.ly
index ef7324b2ca..b609d34d70 100644
--- a/input/star-spangled-banner.ly
+++ b/input/star-spangled-banner.ly
@@ -1,5 +1,5 @@
 %{
-Converted from star.mup with the aid of mup-to-ly.py
+Converted from star.mup with the aid of mup2ly.py
 http://www.Arkkra.com/doc/star.html
 http://www.Arkkra.com/doc/star.ps
 %}
@@ -57,15 +57,20 @@ $staff2_voice_2 = \notes {
   g8. g16 fis4.()a,8 d8 e8 fis2 b8 b8 a4. a8 a,4 d2 s4 
 }
 
-text = \lyrics
- {  Oh4 __ \repeat fold 2 { }
+% hw: how does this work with new repeats?
+textx = \lyrics {  
+  Oh4 __ \repeat fold 2 { }
   \alternative {
-     { say.4 can you | see,2 by8. the16 dawn's4 ear- ly light2 What8
-    so8 proud-4. ly8 we4 hailed,2 At8. the16 twi-4 light's last gleam-
-    ing. Whose8. broad16 }
+     { 
+       say.4 can you | see,2 by8. the16 dawn's4 ear- ly light2 What8
+       so8 proud-4. ly8 we4 hailed,2 At8. the16 twi-4 light's last gleam-
+       ing. Whose8. broad16 
+     }
 
-    { stripes4 and bright stars,2 through8. the16 per-4 il- ous fight,2
-    O'er8 the8 ram-4. parts8 we4 watched,2 were8. so16 gal-4 lant- ly }
+    { 
+      stripes4 and bright stars,2 through8. the16 per-4 il- ous fight,2
+      O'er8 the8 ram-4. parts8 we4 watched,2 were8. so16 gal-4 lant- ly 
+    }
   }
   stream-4 ing. And8. the16 rock-4 ets' red glare,2 the8 bombs8
   burst-4 ing in air,2 gave4 proof4. through8 the4 night2 that8.
@@ -74,6 +79,27 @@ text = \lyrics
   and8 the8 home4. of8 the4 brave.2
 }
 
+text = \lyrics {  
+  Oh4 __ 
+  %\alternative {
+     { 
+       say.4 can you | see,2 by8. the16 dawn's4 ear- ly light2 What8
+       so8 proud-4. ly8 we4 hailed,2 At8. the16 twi-4 light's last gleam-
+       ing. Whose8. broad16 
+     }
+
+    %{ 
+      stripes4 and bright stars,2 through8. the16 per-4 il- ous fight,2
+      O'er8 the8 ram-4. parts8 we4 watched,2 were8. so16 gal-4 lant- ly 
+    }
+  %}
+  stream-4 ing. And8. the16 rock-4 ets' red glare,2 the8 bombs8
+  burst-4 ing in air,2 gave4 proof4. through8 the4 night2 that8.
+  our16 flag4 was still there,2 Oh4 say, does that star- span-
+  gled ban- ner yet wave,2 __ O'er8. the16 land2 __ of8 the8 free2
+  and8 the8 home4. of8 the4 brave.2
+}
+
 global = \notes {
 	\time 3/4;
 	\key D;
diff --git a/lily/beam.cc b/lily/beam.cc
index e523466d3c..43975b65dc 100644
--- a/lily/beam.cc
+++ b/lily/beam.cc
@@ -3,7 +3,7 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--1999, 1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
     Jan Nieuwenhuizen <janneke@gnu.org>
 
 */
@@ -194,27 +194,29 @@ Beam::get_default_dir () const
      wants to provide some real simple hands-on rules.
      
      We have our doubts, so we simply provide all sensible alternatives.
+
+     If dir is not determined: up (see stem::get_default_dir ())
   */
 
   Dir_algorithm a = (Dir_algorithm)rint(paper_l ()->get_var ("beam_dir_algorithm"));
   switch (a)
     {
     case MAJORITY:
-      beamdir = (count[UP] > count[DOWN]) ? UP : DOWN;
+      beamdir = (count[UP] >= count[DOWN]) ? UP : DOWN;
       break;
     case MEAN:
       // mean center distance
-      beamdir = (total[UP] > total[DOWN]) ? UP : DOWN;
+      beamdir = (total[UP] >= total[DOWN]) ? UP : DOWN;
       break;
     default:
     case MEDIAN:
       // median center distance
+      if (!count[DOWN])
+	beamdir = UP;
       if (!count[UP])
 	beamdir = DOWN;
-      else if (!count[DOWN])
-	beamdir = UP;
       else
-	beamdir = (total[UP] / count[UP] > total[DOWN] / count[DOWN]) ? UP : DOWN;
+	beamdir = (total[UP] / count[UP] >= total[DOWN] / count[DOWN]) ? UP : DOWN;
       break;
     }
   return beamdir;
diff --git a/lily/bow.cc b/lily/bow.cc
index e5daab3c1b..a3ac0bf073 100644
--- a/lily/bow.cc
+++ b/lily/bow.cc
@@ -46,8 +46,6 @@ Bow::do_brew_molecule_p () const
       cout << "dy_f_r: " << dy_f_drul_[RIGHT] << endl;
       cout << "dy_f: " << dy_f_drul_[RIGHT] - dy_f_drul_[LEFT] << endl;
     }
-  a.translate (Offset (dx_f_drul_[LEFT], dy_f_drul_[LEFT]));
-
   return new Molecule (a); 
 }
 
@@ -97,14 +95,11 @@ Bow::get_controls () const
 Array<Offset>
 Bow::get_encompass_offset_arr () const
 {
-  Offset d (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT],
-    dy_f_drul_[RIGHT] - dy_f_drul_[LEFT]);
-  d.x() += extent (X_AXIS). length ();
-
-  Array<Offset> notes;
-  notes.push (Offset (0, 0));
-  notes.push (d);
-
-  return notes;
+  Array<Offset> offset_arr;
+  offset_arr.push (Offset (dx_f_drul_[LEFT], dy_f_drul_[LEFT]));
+  offset_arr.push (Offset (do_width ().length () + dx_f_drul_[RIGHT],
+		      dy_f_drul_[RIGHT]));
+		      
+  return offset_arr;
 }
 
diff --git a/lily/encompass-info.cc b/lily/encompass-info.cc
index 0271eba297..8dd95437d4 100644
--- a/lily/encompass-info.cc
+++ b/lily/encompass-info.cc
@@ -23,33 +23,28 @@ Encompass_info::Encompass_info ()
   assert (0);
 }
 
-Encompass_info::Encompass_info (Note_column const* note, Direction dir, Slur const* slur_l)
+Encompass_info::Encompass_info (Note_column const* note_column, Direction dir, Slur const* slur_l)
 {
   interstaff_f_ = 0;
   
-  Paper_def* paper = note->paper_l ();
-  
-  // UGH
-  Real notewidth = paper->note_width () * 0.8;
-  
-
-  Stem* stem_l = note->stem_l_;
+  Stem* stem_l = note_column->stem_l_;
   if (!stem_l)
     {
-      warning ("Slur over rest?");
-      o_[X_AXIS] = note->hpos_f ();
+      warning (_ ("Slur over rest?"));
+      o_[X_AXIS] = note_column->hpos_f ();
       return; 
     }
   
-  Real internote = stem_l-> staff_line_leading_f ()/2.;
+  o_[X_AXIS] = stem_l->hpos_f ();
 
+#if 0
   /* 
+    Let's not do this; yields ugly assymetric slurs.
+
     set o_[X_AXIS] to middle of notehead or on the exact position of stem,
     according to slur direction
-   */
-  o_[X_AXIS] = stem_l->hpos_f ();
 
-  /*
+    
      stem_l->dir == dir
                       ________
            |   |     /        \
@@ -58,18 +53,34 @@ Encompass_info::Encompass_info (Note_column const* note, Direction dir, Slur con
 
    */
 
+  dx_f_drul_[d] = -d * spanned_drul_[d]->extent (X_AXIS).length ();
+
   if (stem_l->dir_ != dir)
-    o_[X_AXIS] -= 0.5 * notewidth * stem_l->dir_;
+    o_[X_AXIS] -= 0.5 * stem_l->dir_ * note_column->extent (X_AXIS).length ();
+
+#else
 
-  o_[Y_AXIS] = stem_l->extent (Y_AXIS)[dir];
   /*
-   leave a gap: slur mustn't touch head/stem
+    Instead; simply set x to middle of notehead
    */
-  o_[Y_AXIS] += 2.5 * internote * dir;
 
-  if (stem_l->dir_ != dir)
-    o_[Y_AXIS] += 1.0 * internote * dir;
+  o_[X_AXIS] -= 0.5 * stem_l->dir_ * note_column->extent (X_AXIS).length ();
+
+#endif
+
+  if (stem_l->dir_ == dir)
+    {
+      o_[Y_AXIS] = stem_l->extent (Y_AXIS)[dir];
+    }
+  else
+    {
+      o_[Y_AXIS] = note_column->extent (Y_AXIS)[dir];
+    }
 
+  /*
+   leave a gap: slur mustn't touch head/stem
+   */
+  o_[Y_AXIS] += dir * slur_l->paper_l ()->get_var ("slur_y_free");
 
   Dimension_cache *common = stem_l->common_group (slur_l, Y_AXIS);
   Align_element * align = dynamic_cast<Align_element*> (common->element_l ());
@@ -82,7 +93,7 @@ Encompass_info::Encompass_info (Note_column const* note, Direction dir, Slur con
       interstaff_f_ = align->threshold_interval_[MIN];
 
       Dimension_cache * slur_refpoint = slur_l->dim_cache_[Y_AXIS];
-      Dimension_cache * note_refpoint = note->dim_cache_[Y_AXIS];
+      Dimension_cache * note_refpoint = note_column->dim_cache_[Y_AXIS];
 
       while (slur_refpoint->parent_l_ != common)
 	slur_refpoint = slur_refpoint->parent_l_;
diff --git a/lily/include/slur.hh b/lily/include/slur.hh
index 5f634e700c..bf61df4b86 100644
--- a/lily/include/slur.hh
+++ b/lily/include/slur.hh
@@ -15,10 +15,6 @@
  */
 class Slur : public Bow
 {
-  bool broken_edge_b ( Direction dir) const;
-  bool normal_edge_b ( Direction dir) const;
-  Drul_array<Note_column*> extrema () const; 
-
 public:
   Slur ();
   VIRTUAL_COPY_CONS(Score_element);
diff --git a/lily/misc.cc b/lily/misc.cc
index ae015bdbc1..3f1f2ad949 100644
--- a/lily/misc.cc
+++ b/lily/misc.cc
@@ -3,7 +3,7 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--1999, 1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
     Jan Nieuwenhuizen <janneke@gnu.org>
 */
 
diff --git a/lily/slur.cc b/lily/slur.cc
index 827e9a0222..82aaa7e544 100644
--- a/lily/slur.cc
+++ b/lily/slur.cc
@@ -3,16 +3,14 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1996,  1997--1999, 1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1996,  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
     Jan Nieuwenhuizen <janneke@gnu.org>
 */
 
 /*
   [TODO]
-    * URG: share code with tie
-    * begin and end should be treated as a Script.
-    * damping
-    * slur from notehead to stemend: c''()b''
+    * begin and end should be treated as a/acknowledge Scripts.
+    * broken slur should have uniform trend
  */
 
 #include "slur.hh"
@@ -42,7 +40,6 @@ Slur::add_column (Note_column*n)
   else
     {
       encompass_arr_.push (n);
-      //  n->stem_l_->slur_l_ = this;
       add_dependency (n);
     }
 }
@@ -95,36 +92,6 @@ Note_column_compare (Note_column *const&n1 , Note_column* const&n2)
   return Item::left_right_compare (n1, n2);
 }
 
-bool
-Slur::broken_edge_b ( Direction dir) const
-{
-  return extrema ()[dir] != spanned_drul_[dir];
-}
-
-bool
-Slur::normal_edge_b ( Direction dir) const
-{
-  Note_column *n = extrema ()[dir];
-  return !broken_edge_b ( dir)
-    && n->stem_l_
-    && n->stem_l_->get_elt_property (transparent_scm_sym) == SCM_BOOL_F
-    && n->head_l_arr_.size ();
-}
-
-Drul_array<Note_column*>
-Slur::extrema ()const
-{
-  Drul_array<Note_column*> extrema;
-  extrema[LEFT] = encompass_arr_[0];
-  extrema[RIGHT] = encompass_arr_.top ();
-  return extrema;
-}
-
-/*
-  TODO.
-
-  Unhair this.
- */
 void
 Slur::do_post_processing ()
 {
@@ -132,237 +99,231 @@ Slur::do_post_processing ()
   if (!dir_)
     dir_ = get_default_dir ();
 
-  Real interline_f = paper_l ()->get_realvar (interline_scm_sym);
-  Real internote_f = interline_f / 2;
-  // URG
-  Real notewidth_f = paper_l ()->note_width () * 0.8;
-
   /* 
-   [OSU]: slur and tie placement
+   Slur and tie placement [OSU]
 
-   slurs:
-   * x = center of head (upside-down: inner raakpunt stem) - d * gap
+   Slurs:
+   * x = centre of head - d * x_gap_f
 
-   * y = length < 5ss : horizontal raakpunt + d * 0.25 ss
+   TODO:
+   * y = length < 5ss : horizontal tangent + d * 0.25 ss
      y = length >= 5ss : y next interline - d * 0.25 ss
-     --> height <= 5 length ?? we use <= 3 length, now...
    */
-  
-  Real gap_f = paper_l ()->get_var ("slur_x_gap");
 
+  Real interline_f = paper_l ()->get_realvar (interline_scm_sym);
+  Real internote_f = interline_f / 2;
+
+  Real x_gap_f = paper_l ()->get_var ("slur_x_gap");
+  Real y_gap_f = paper_l ()->get_var ("slur_y_gap");
+
+  Drul_array<Note_column*> note_column_drul;
+  note_column_drul[LEFT] = encompass_arr_[0];
+  note_column_drul[RIGHT] = encompass_arr_.top ();
 
-  Direction d=LEFT;
- 
+  bool fix_broken_b = false;
+  Direction d = LEFT;
   do 
     {
-      if (broken_edge_b (d))
+      dx_f_drul_[d] = dy_f_drul_[d] = 0;
+      if ((note_column_drul[d] == spanned_drul_[d])
+	  && note_column_drul[d]->head_l_arr_.size ()
+	  && (note_column_drul[d]->stem_l_))
 	{
-	  // ugh -- check if needed
-	  dx_f_drul_[d] = -d 
-	    *(spanned_drul_[d]->extent (X_AXIS).length () - 0.5 * notewidth_f);
-
-	  // prebreak
-	  if (d == RIGHT)
+	  Stem* stem_l = note_column_drul[d]->stem_l_;
+	  /*
+	    side directly attached to note head;
+	    no beam getting in the way
+	  */
+	  if (((stem_l->get_elt_property (transparent_scm_sym) != SCM_BOOL_F)
+	       || !((stem_l->dir_ == dir_) && (dir_ != d)))
+	      && !((dir_ == stem_l->dir_)
+		   && stem_l->beam_l_ && (stem_l->beams_i_drul_[-d] >= 1)))
 	    {
-	      dx_f_drul_[LEFT] = spanned_drul_[LEFT]->extent (X_AXIS).length ();
-	      
-	      // urg -- check if needed
-	      if (encompass_arr_.size () > 1)
-		dx_f_drul_[RIGHT] += notewidth_f;
+	      dx_f_drul_[d] = spanned_drul_[d]->extent (X_AXIS).length () / 2;
+	      dx_f_drul_[d] -= d * x_gap_f;
+
+	      if (stem_l->dir_ != dir_)
+		{
+		  dy_f_drul_[d] = note_column_drul[d]->extent (Y_AXIS)[dir_];
+		}
+	      else
+		{
+		  dy_f_drul_[d] = stem_l->chord_start_f ()
+		    + dir_ * internote_f;
+		}
+	      dy_f_drul_[d] += dir_ * y_gap_f;
 	    }
-	}
-      /*
-        normal slur
-       */
-      else if (normal_edge_b (d))
-        {
-	  Real notewidth_f = extrema ()[d]->extent (X_AXIS).length ();
-	  dy_f_drul_[d] = (int)rint (extrema ()[d]->stem_l_-> extent (Y_AXIS)[dir_]);
-	  dx_f_drul_[d] += 0.5 * notewidth_f - d * gap_f;
-	  if (dir_ == extrema ()[d]->stem_l_->dir_)
+	  /*
+	    side attached to (visible) stem
+	  */
+	  else
 	    {
-	      if (dir_ == d)
-		dx_f_drul_[d] += 0.5 * dir_ * notewidth_f;
+	      dx_f_drul_[d] = stem_l->hpos_f ()
+		- spanned_drul_[d]->absolute_coordinate (X_AXIS);
+	      /*
+		side attached to beamed stem
+	       */
+	      if (stem_l->beam_l_ && (stem_l->beams_i_drul_[-d] >= 1))
+		{
+		  dy_f_drul_[d] = stem_l->extent (Y_AXIS)[dir_];
+		  dy_f_drul_[d] += dir_ * 2 * y_gap_f;
+		}
+	      /*
+		side attached to notehead, with stem getting in the way
+	       */
 	      else
-		dx_f_drul_[d] += 0.25 * dir_ * notewidth_f;
+		{
+		  dx_f_drul_[d] -= d * x_gap_f;
+		  
+		  dy_f_drul_[d] = stem_l->chord_start_f ()
+		    + dir_ * internote_f;
+		  dy_f_drul_[d] += dir_ * y_gap_f;
+		}
 	    }
 	}
-	else 
-	  {
-	    Real notewidth_f = extrema ()[d]->extent (X_AXIS).length ();
-	    dy_f_drul_[d] = (int)rint (extrema ()[d]->head_positions_interval ()
-				       [dir_]) * internote_f;
-	    dx_f_drul_[d] += 0.5 * notewidth_f - d * gap_f;
+      /*
+	loose end
+      */
+      else
+	{
+	  dx_f_drul_[d] -= d * x_gap_f;
+	  /*
+	    broken: should get y from other piece, so that slur
+	    continues up/down trend
+
+	    for now: be horizontal..
+	  */
+	  fix_broken_b = true;
 	}
-	dy_f_drul_[d] += dir_ * interline_f;
-	if (extrema ()[d]->stem_l_ && (dir_ == extrema ()[d]->stem_l_->dir_))
-	  dy_f_drul_[d] -= dir_ * internote_f;
-      }
-  while (flip(&d) != LEFT);
+    }
+  while (flip (&d) != LEFT);
 
-  // now that both are set, do dependent
-  do 
-    {
-      if (broken_edge_b (d))
-        {
-	  Direction u = d;
-	  flip(&u);
+  if (fix_broken_b)
+    do {
+      if (dy_f_drul_[d])
+	dy_f_drul_[-d] = dy_f_drul_[d];
+    }
+    while (flip (&d) != LEFT);
+	
+
+  /*
+    Now we've got a fine slur
+    Catch and correct some ugly cases
+   */
 
-	  // postbreak
-	  if (d == LEFT)
-	    dy_f_drul_[u] += dir_ * internote_f;
+  Real dx_f = do_width ().length () + dx_f_drul_[RIGHT] - dx_f_drul_[LEFT];
+  Real dy_f = dy_f_drul_[RIGHT] - dy_f_drul_[LEFT];
+  Real height_f = do_height ().length ();
 
-	  dy_f_drul_[d] = dy_f_drul_[u];
-	}
-     }
-  while (flip(&d) != LEFT);
+  Real height_damp_f = paper_l ()->get_var ("slur_height_damping");
+  Real slope_damp_f = paper_l ()->get_var ("slur_slope_damping");
+  Real ratio_f;
+
+
+  /*
+    Avoid too steep slurs.
+   */
+  ratio_f = abs (dy_f / dx_f);
+  if (ratio_f > slope_damp_f)
+    {
+      Direction d = (Direction)(- dir_ * (sign (dy_f)));
+      if (!d)
+	d = LEFT;
+      dy_f_drul_[d] += dir_ * (ratio_f - slope_damp_f) * dx_f;
+    }
 
   /*
-    Slur should follow line of music
+   Avoid too high slurs 
    */
-  if (normal_edge_b (LEFT)
-      && normal_edge_b (RIGHT)
-      && (extrema ()[LEFT]->stem_l_ != extrema ()[RIGHT]->stem_l_))
+  ratio_f = abs (height_f / dx_f);
+  if (ratio_f > height_damp_f)
     {
-      Real note_dy = extrema ()[RIGHT]->stem_l_->head_positions ()[dir_]
-	- extrema ()[LEFT]->stem_l_->head_positions ()[dir_];
-      Real dy = dy_f_drul_[RIGHT] - dy_f_drul_[LEFT];
+      Direction d = (Direction)(- dir_ * (sign (dy_f)));
+      if (!d)
+	d = LEFT;
+      dy_f_drul_[d] += dir_ * height_f * height_damp_f;
       /*
-	Should we always follow note-heads, (like a tie)?
-	For now, only if the note_dy != slur_dy, we'll do
-	slur_dy := note_dy * factor.
-      */
-      if (sign (dy) != sign (note_dy))
+	if y positions at same height, correct both ends
+       */
+      if (abs (dy_f / dx_f ) < slope_damp_f)
 	{
-	  Real damp_f = paper_l ()->get_var ("slur_slope_follow_music_factor");
-	  Real realdy = note_dy * damp_f;
-	  Direction adjust_dir = (Direction)(- dir_ * sign (realdy));
-	  if (!adjust_dir)
-	    adjust_dir = -dir_;
-	  /*
-	    adjust only if no beam gets in the way
-	   */
-	  if (!extrema ()[adjust_dir]->stem_l_->beam_l_
-	      || (adjust_dir == extrema ()[adjust_dir]->stem_l_->dir_)
-	      || (extrema ()[adjust_dir]->stem_l_->beams_i_drul_[-adjust_dir] < 1))
-	    {
-	      dy_f_drul_[adjust_dir] = dy_f_drul_[-adjust_dir]
-		+ 2 * adjust_dir * realdy;
-	      Real dx = notewidth_f / 2;
-	      if (adjust_dir != extrema ()[adjust_dir]->stem_l_->dir_)
-		dx /= 2;
-	      dx_f_drul_[adjust_dir] -= adjust_dir * dx;
-	    }
+	  dy_f_drul_[-d] += dir_ * height_f * height_damp_f;
 	}
     }
 
   /*
-    Avoid too steep slurs.
-   */
-  Real damp_f = paper_l ()->get_var ("slur_slope_damping");
-  Offset d_off = Offset (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT],
-    dy_f_drul_[RIGHT] - dy_f_drul_[LEFT]);
-  d_off[X_AXIS] += extent (X_AXIS).length ();
-
-  Real ratio_f = abs (d_off[Y_AXIS] / d_off[X_AXIS]);
-  if (ratio_f > damp_f)
-    dy_f_drul_[(Direction)(- dir_ * sign (d_off[Y_AXIS]))] +=
-      dir_ * (ratio_f - damp_f) * d_off[X_AXIS];
+    If, after correcting, we're close to stem-end...
+  */
+  Real snap_f = paper_l ()->get_var ("slur_snap_to_stem");
+  do
+    {
+      if ((note_column_drul[d] == spanned_drul_[d])
+	  && (note_column_drul[d]->stem_l_)
+	  && (note_column_drul[d]->stem_l_->dir_ == dir_)
+	  && (abs (note_column_drul[d]->stem_l_->extent (Y_AXIS)[dir_]
+		   - dy_f_drul_[d]) <= snap_f))
+	{
+	  /*
+	    attach to stem-end
+	  */
+	  Stem* stem_l = note_column_drul[d]->stem_l_;
+	  dx_f_drul_[d] = stem_l->hpos_f ()
+	    - spanned_drul_[d]->absolute_coordinate (X_AXIS);
+	  dy_f_drul_[d] = stem_l->extent (Y_AXIS)[dir_];
+	  dy_f_drul_[d] += dir_ * 2 * y_gap_f;
+	}
+    }
+  while (flip (&d) != LEFT);
 }
 
 Array<Offset>
 Slur::get_encompass_offset_arr () const
 {
-  Real notewidth = paper_l ()->note_width () * 0.8;
-  Real gap = paper_l ()->get_var ("slur_x_gap");
-
-  /*
-  urg.  Calcs done wrt the leftmost note.  Fixme.
-
-  Calcs ignore possibility of pre/postbreak.
-
-
-  */
-
-  Offset left = Offset (dx_f_drul_[LEFT], dy_f_drul_[LEFT]);
-  left[X_AXIS] += encompass_arr_[0]->stem_l_->hpos_f ();
-
-  Real internote = encompass_arr_[0]->stem_l_->staff_line_leading_f ()/2.0;
-
-  /*
-    <URG>
-    i don't understand these two, but *must* for symmetry 
-    look at encompass array: 
-       lilypond -D input/test/slur-symmetry*.ly
-       lilypond -D input/test/sleur.ly
-
-    do_post_processing should have calculated these into
-    dx_f_drul_[], no??
-
-   */
-
-  if (dir_ != encompass_arr_[0]->stem_l_->dir_)
-    left[X_AXIS] += - 0.5 * notewidth * encompass_arr_[0]->stem_l_->dir_
-      + gap;
-  else if (encompass_arr_[0]->stem_l_->dir_ == UP)
-    left[X_AXIS] -= notewidth;
-
-  if ((dir_ == encompass_arr_[0]->stem_l_->dir_) 
-    && (encompass_arr_[0]->stem_l_->dir_ == DOWN))
-    left[Y_AXIS] -= internote * encompass_arr_[0]->stem_l_->dir_;
-  /* </URG> */
-
-  Offset d = Offset (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT],
-    dy_f_drul_[RIGHT] - dy_f_drul_[LEFT]);
-  d[X_AXIS] += extent (X_AXIS).length ();
+  Array<Offset> offset_arr;
+  Offset origin (absolute_coordinate (X_AXIS), 0);
 
   int first = 1;
-  int last = encompass_arr_.size () - 1;
+  int last = encompass_arr_.size () - 2;
 
-
-  Array<Offset> notes;
-  notes.push (Offset (0,0));
-
-  // prebreak
-  if (broken_edge_b (RIGHT))
-    last++;
-  else
-    {
-      Encompass_info info (encompass_arr_.top (), dir_, this);
-      d[Y_AXIS] += info.interstaff_f_;
-    }
-  
-  // postbreak
-  if (broken_edge_b (LEFT))
+  /*
+    left is broken edge
+  */
+  if (encompass_arr_[0] != spanned_drul_[LEFT])
     {
       first--;
-      /*
-        interstaff postbreak: slur begins at height of last note
-       */
-      Encompass_info info (encompass_arr_[0], dir_, this);
-      notes[0][Y_AXIS] += info.interstaff_f_;
     }
-  else
+  Encompass_info left_info (encompass_arr_[0], dir_, this);
+  offset_arr.push (Offset (0, left_info.interstaff_f_));
+
+  /*
+    right is broken edge
+  */
+  if (encompass_arr_.top () != spanned_drul_[RIGHT])
     {
-      Encompass_info info (encompass_arr_[0], dir_, this);
-      notes[0][Y_AXIS] += info.interstaff_f_;
+      last++;
     }
 
-  for (int i = first; i < last; i++)
+  for (int i = first; i <= last; i++)
     {
       Encompass_info info (encompass_arr_[i], dir_, this);
-      notes.push (info.o_ - left);
+      offset_arr.push (info.o_ - origin);
     }
 
-  /*
-    interstaff prebreak: slur ends at height of last note
-   */
-  if (broken_edge_b (RIGHT))
-    d[Y_AXIS] = notes.top ()[Y_AXIS];
+  offset_arr.push (Offset (do_width ().length (), 0));
 
-  notes.push (d);
+#if 1
+  offset_arr[0] += Offset (dx_f_drul_[LEFT], dy_f_drul_[LEFT]);
+  offset_arr.top () += Offset (dx_f_drul_[RIGHT], dy_f_drul_[RIGHT]);
+#else
+  /*
+    check non-disturbed slur
+    FIXME: ends off by a tiny bit!!
+  */
+  offset_arr[0] += Offset (0, dy_f_drul_[LEFT]);
+  offset_arr.top () += Offset (0, dy_f_drul_[RIGHT]);
+#endif
   
-  return notes;
+  return offset_arr;
 }
 
 
diff --git a/lily/spanner.cc b/lily/spanner.cc
index 17ca378449..9fbd9b8226 100644
--- a/lily/spanner.cc
+++ b/lily/spanner.cc
@@ -41,7 +41,6 @@ Spanner::break_into_pieces ()
     }
   
   Link_array<Item> break_points = pscore_l_->broken_col_range (left,right);
-  Link_array<Spanner> broken_into_l_arr;
 
   break_points.insert (left,0);
   break_points.push (right);
diff --git a/ly/params.ly b/ly/params.ly
index afc68d5ab7..47b28f061e 100644
--- a/ly/params.ly
+++ b/ly/params.ly
@@ -87,17 +87,23 @@ beam_steep_slope = 0.2 / 1.0;
 
 % OSU: suggested gap = ss / 5;
 slur_x_gap = \interline / 5.0;
+slur_y_gap = 0.25 * \interline;
+slur_y_free = 0.75 * \interline;
 slur_x_minimum = 3.0 * \interline;
 
 % slope damping: keep dy/dx < slur_slope_damping
-slur_slope_damping = 0.6;
-
-% dy_slur := dy_music * factor
-slur_slope_follow_music_factor = 0.8;
+slur_slope_damping = 0.3;
+% height damping: keep h/dx < slur_height_damping
+slur_height_damping = 0.5;
+% snap to stem if slur ends closer to stem than
+slur_snap_to_stem = 1.5 * \interline;
 
 tie_x_minimum = \slur_x_minimum;
+% OSU: tie gap == slur gap
 tie_x_gap = \slur_x_gap;
-tie_slope_damping = 0.8;
+tie_y_gap = 0.25 * \interline;
+% length of a tie that's a staffspace high
+tie_staffspace_length = 4.0 * \interline;
 
 % ugh: rename to bow (in bezier.cc and fonts.doc too...)
 % slur_thickness = 1.8 * \staffline;
@@ -180,6 +186,8 @@ postBreakPadding = 0.0;
 stemSpacingCorrection = 0.5*\interline;
 
 
+% relative strength of space following  time signature, 
+non_musical_space_strength = 4.0; 
 
 
 
-- 
2.39.5