patch::: 1.3.33.jcn3

[lilypond.git] / lily / stem-tremolo.cc

diff --git a/lily/stem-tremolo.cc b/lily/stem-tremolo.cc
index fc6df56fa8802d5995489b34f9c8fd112c1cd94f..d945dc246338a156138c2e955973ce76303fad09 100644 (file)
--- a/lily/stem-tremolo.cc
+++ b/lily/stem-tremolo.cc
@@ -1,9 +1,9 @@
 /*   
-  abbrev.cc --  implement Stem_tremolo
+  stem-tremolo.cc --  implement Stem_tremolo
   
   source file of the GNU LilyPond music typesetter
   
-  (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 
@@ -15,18 +15,19 @@
 #include "stem.hh"
 #include "offset.hh"
 #include "dimension-cache.hh"
+#include "staff-symbol-referencer.hh"
+#include "directional-element-interface.hh"
+
+/*
+  TODO:
+    lengthen stem if necessary
+ */
 
 Stem_tremolo::Stem_tremolo ()
 {
   set_elt_property ("stem", SCM_EOL);
-  abbrev_flags_i_ = 1;
 }
 
-void
-Stem_tremolo::do_print () const
-{
-  DEBUG_OUT << "abbrev_flags_i_ " << abbrev_flags_i_;
-}
 
 Stem *
 Stem_tremolo::stem_l ()const
@@ -40,82 +41,91 @@ Interval
 Stem_tremolo::dim_callback (Dimension_cache const *c) 
 {
   Stem_tremolo * s = dynamic_cast<Stem_tremolo*> (c->element_l ());
-  Real space = s->stem_l ()->staff_line_leading_f ();
+  Real space = Staff_symbol_referencer_interface (s->stem_l ())
+    .staff_space ();
   return Interval (-space, space);
 }
 
 
-Molecule*
-Stem_tremolo::do_brew_molecule_p () const
+Molecule 
+Stem_tremolo::do_brew_molecule () const
 {
-  Stem * st = stem_l ();
-  int mult =0;
-  if (Beam * b = st->beam_l ())
+  Stem * stem = stem_l ();
+  Beam * beam = stem->beam_l ();
+  
+  Real dydx;
+  if (beam)
     {
-      mult = b->multiplicity_i_;
+      Real dy = 0;
+      SCM s = beam->get_elt_property ("height");
+      if (gh_number_p (s))
+       dy = gh_scm2double (s);
+      Real dx = beam->last_visible_stem ()->hpos_f ()
+       - beam->first_visible_stem ()->hpos_f ();
+      dydx = dx ? dy/dx : 0;
     }
+  else
+    // urg
+    dydx = 0.25;
+
+  Real thick = gh_scm2double (get_elt_property ("beam-thickness"));
+  Real width = gh_scm2double (get_elt_property ("beam-width"));
+  Molecule a (lookup_l ()->beam (dydx, width, thick));
+  a.translate (Offset (-width/2, width / 2 * dydx));
   
+  int tremolo_flags;
+  SCM s = get_elt_property ("tremolo-flags");
+  if (gh_number_p (s))
+    tremolo_flags = gh_scm2int (s);
+  else
+    // huh?
+    tremolo_flags = 1;
+
+  int mult = beam ? beam->get_multiplicity () : 0;
   Real interbeam_f = paper_l ()->interbeam_f (mult);
-  Real w  = gh_scm2double (get_elt_property ("beam-width"));
-  Real space = st->staff_line_leading_f ();
-  Real internote_f = space / 2;
-  Real beam_f = gh_scm2double (get_elt_property ("beam-thickness"));
-
-  int beams_i = 0;
-  Real slope_f = 0.25;
-
-  if (st && st->beam_l ()) {
-    slope_f = st->beam_l ()->slope_f_;
-    // ugh, rather calc from Stem_tremolo_req
-    beams_i = st->beams_i_drul_[RIGHT] >? st->beams_i_drul_[LEFT];
-  } 
-
-  Molecule a (lookup_l ()->beam (slope_f, w, beam_f));
-  a.translate (Offset (-w/2, w / 2 * slope_f));
-
-  Molecule *beams= new Molecule; 
-  for (int i = 0; i < abbrev_flags_i_; i++)
+  Molecule mol; 
+  for (int i = 0; i < tremolo_flags; i++)
     {
       Molecule b (a);
       b.translate_axis (interbeam_f * i, Y_AXIS);
-      beams->add_molecule (b);
+      mol.add_molecule (b);
     }
-  beams->translate_axis (-beams->extent ()[Y_AXIS].center (), Y_AXIS);
-
-  if (st)
-    { 
-      if (st->beam_l ())
-        {
-         beams->translate (Offset(st->hpos_f () - hpos_f (),
-           st->stem_end_f () * internote_f - 
-           st->beam_l ()->get_direction () * beams_i * interbeam_f));
-       }
-      else
-       {  
-         /*
-           Beams should intersect one beamthickness below staff end
-          */
-         Real dy = - beams->extent ()[Y_AXIS].length () / 2 * st->get_direction ();
-
-         /*
-           uhg.  Should use relative coords and placement
-         */
-         Real whole_note_correction = (st && st->invisible_b( ))
-           ? -st->get_direction () * st->note_delta_f ()/2
-           : 0.0;
-
-         dy += st->stem_end_f ();
-         beams->translate (Offset(st->hpos_f () - hpos_f ()+
-                                  whole_note_correction, dy));
-       }
+  if (tremolo_flags)
+    mol.translate_axis (-mol.extent ()[Y_AXIS].center (), Y_AXIS);
+
+  Real half_space = Staff_symbol_referencer_interface (stem).staff_space ()
+    / 2;
+  if (beam)
+    {
+      // ugh, rather calc from Stem_tremolo_req
+      int beams_i = stem->beam_count(RIGHT) >? stem->beam_count (LEFT);
+      mol.translate (Offset(stem->hpos_f () - hpos_f (),
+                           stem->stem_end_position () * half_space - 
+                           directional_element (beam).get () * beams_i * interbeam_f));
+    }
+  else
+    {  
+      /*
+       Beams should intersect one beamthickness below stem end
+      */
+      Real dy = stem->stem_end_position () * half_space;
+      dy -= mol.extent ()[Y_AXIS].length () / 2 *  stem->get_direction ();
 
       /*
-       there used to be half a page of code that was long commented out.
-       Removed in 1.1.35
-       */
+       uhg.  Should use relative coords and placement
+      */
+      Real whole_note_correction;
+      if (stem->invisible_b ())
+       whole_note_correction = -stem->get_direction ()
+         * stem->support_head ()->extent (X_AXIS).length () / 2;
+      else
+       whole_note_correction = 0;
+        
+      mol.translate (Offset (stem->hpos_f () - hpos_f () +
+                            whole_note_correction, dy));
     }
   
-  return beams;
+  return mol;
 }