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[lilypond.git] / lily / beam-concave.cc

diff --git a/lily/beam-concave.cc b/lily/beam-concave.cc
index 367a1a4990984af12948f84dbc0079b9364ba531..e703f9e9f796c62a837fe36843584c32fe70c461 100644 (file)
--- a/lily/beam-concave.cc
+++ b/lily/beam-concave.cc
@@ -1,57 +1,55 @@
 /*
 /*

-   Determine whether a beam is concave.
- */
+  Determine whether a beam is concave.
+*/

 
 

-#include <math.h>
-
-#include "group-interface.hh"
-#include "array.hh"
+#include "pointer-group-interface.hh"

 #include "stem.hh"
 #include "beam.hh"
 #include "stem.hh"
 #include "beam.hh"

+#include "grob.hh"

 #include "staff-symbol-referencer.hh"
 #include "staff-symbol-referencer.hh"

+#include "directional-element-interface.hh"

 
 bool
 
 bool

-is_concave_single_notes (Array<int> const &positions, Direction beam_dir)
+is_concave_single_notes (vector<int> const &positions, Direction beam_dir)

 {
   Interval covering;
   covering.add_point (positions[0]);
 {
   Interval covering;
   covering.add_point (positions[0]);

-  covering.add_point (positions.top ());
+  covering.add_point (positions.back ());

 
   bool above = false;
   bool below = false;
   bool concave = false;
 
   bool above = false;
   bool below = false;
   bool concave = false;

-  
+

   /*
     notes above and below the interval covered by 1st and last note.
   /*
     notes above and below the interval covered by 1st and last note.

-   */
-  for (int i = 1; i < positions.size () - 1; i++)
+  */
+  for (vsize i = 1; i + 1 < positions.size (); i++)

     {
       above = above || (positions[i] > covering[UP]);
       below = below || (positions[i] < covering[DOWN]);
     }
 
     {
       above = above || (positions[i] > covering[UP]);
       below = below || (positions[i] < covering[DOWN]);
     }
 

-

   concave = concave || (above && below);
   /*
     A note as close or closer to the beam than begin and end, but the
     note is reached in the opposite direction as the last-first dy
   concave = concave || (above && below);
   /*
     A note as close or closer to the beam than begin and end, but the
     note is reached in the opposite direction as the last-first dy

-   */
-  int dy = positions.top() - positions[0];
-  int closest = (beam_dir * positions.top()) >? (beam_dir *positions[0]);
-  for (int i = 2; !concave && i < positions.size () - 1; i++)
+  */
+  int dy = positions.back () - positions[0];
+  int closest = max (beam_dir * positions.back (), beam_dir * positions[0]);
+  for (vsize i = 2; !concave && i + 1 < positions.size (); i++)

     {
     {

-      int inner_dy = positions[i] - positions[i-1];
+      int inner_dy = positions[i] - positions[i - 1];

       if (sign (inner_dy) != sign (dy)
          && (beam_dir * positions[i] >= closest
       if (sign (inner_dy) != sign (dy)
          && (beam_dir * positions[i] >= closest

-             || beam_dir * positions[i-1] >= closest))
+             || beam_dir * positions[i - 1] >= closest))

        concave = true;
     }
        concave = true;
     }

-  
-  bool all_closer = true; 
-  for (int i = 1; all_closer && i < positions.size ()-1; i++)
+
+  bool all_closer = true;
+  for (vsize i = 1; all_closer && i + 1 < positions.size (); i++)

     {
     {

-      all_closer = all_closer &&
-       (beam_dir * positions[i] > closest);
+      all_closer = all_closer
+       && (beam_dir * positions[i] > closest);

     }
 
   concave = concave || all_closer;
     }
 
   concave = concave || all_closer;


@@ -59,19 +57,19 @@ is_concave_single_notes (Array<int> const &positions, Direction beam_dir)
 }
 
 Real
 }
 
 Real

-calc_concaveness (Array<int> const &positions, Direction beam_dir)
+calc_positions_concaveness (vector<int> const &positions, Direction beam_dir)

 {
 {

-  Real dy = positions.top () - positions[0];
-  Real slope = dy / Real (positions.size() - 1);
+  Real dy = positions.back () - positions[0];
+  Real slope = dy / Real (positions.size () - 1);

   Real concaveness = 0.0;
   Real concaveness = 0.0;

-  for (int i = 1; i < positions.size() - 1; i++)
+  for (vsize i = 1; i + 1 < positions.size (); i++)

     {
       Real line_y = slope * i + positions[0];
 
     {
       Real line_y = slope * i + positions[0];
 

-      concaveness += (beam_dir * (positions[i] - line_y)) >? 0.0;
+      concaveness += max (beam_dir * (positions[i] - line_y), 0.0);

     }
 
     }
 

-  concaveness /= positions.size () ;
+  concaveness /= positions.size ();

 
   /*
     Normalize. For dy = 0, the slope ends up as 0 anyway, so the
 
   /*
     Normalize. For dy = 0, the slope ends up as 0 anyway, so the


@@ -82,37 +80,37 @@ calc_concaveness (Array<int> const &positions, Direction beam_dir)
   return concaveness;
 }
 
   return concaveness;
 }
 

-MAKE_SCHEME_CALLBACK (Beam, check_concave, 1);
+
+MAKE_SCHEME_CALLBACK (Beam, calc_concaveness, 1);

 SCM
 SCM

-Beam::check_concave (SCM smob)
+Beam::calc_concaveness (SCM smob)

 {
   Grob *me = unsmob_grob (smob);
 
 {
   Grob *me = unsmob_grob (smob);
 

-  Link_array<Grob> stems = 
-    Pointer_group_interface__extract_grobs (me, (Grob*) 0, "stems");
+  vector<Grob*> stems
+    = extract_grob_array (me, "stems");

 
   if (is_knee (me))
 
   if (is_knee (me))

-    return SCM_UNSPECIFIED;
-  
+    return scm_from_double (0.0);
+

   Direction beam_dir = CENTER;
   Direction beam_dir = CENTER;

-  for (int i = stems.size (); i--; )
+  for (vsize i = stems.size (); i--;)

     {
     {

-      if (Stem::is_invisible (stems[i]))
-       stems.del (i);
-      else
+      if (Stem::is_normal_stem (stems[i]))

        {
        {

-         if (Direction dir = Stem::get_direction (stems[i]))
+         if (Direction dir = get_grob_direction (stems[i]))

            beam_dir = dir;
        }
            beam_dir = dir;
        }

+      else
+       stems.erase (stems.begin () + i);

     }
     }

-  
-  if (stems.size () <= 2)
-    return SCM_UNSPECIFIED;

 
 

+  if (stems.size () <= 2)
+    return scm_from_int (0);

 
 

-  Array<int> close_positions;
-  Array<int> far_positions;
-  for (int i= 0; i < stems.size (); i++)
+  vector<int> close_positions;
+  vector<int> far_positions;
+  for (vsize i = 0; i < stems.size (); i++)

     {
       /*
        For chords, we take the note head that is closest to the beam.
     {
       /*
        For chords, we take the note head that is closest to the beam.


@@ -120,31 +118,28 @@ Beam::check_concave (SCM smob)
        Hmmm.. wait, for the beams in the last measure of morgenlied,
        this doesn't look so good. Let's try the heads farthest from
        the beam.
        Hmmm.. wait, for the beams in the last measure of morgenlied,
        this doesn't look so good. Let's try the heads farthest from
        the beam.

-       
-       */
+
+      */

       Interval posns = Stem::head_positions (stems[i]);
       Interval posns = Stem::head_positions (stems[i]);

-      
-      close_positions.push ((int) rint (posns[beam_dir]));
-      far_positions.push ((int) rint (posns[-beam_dir]));
+
+      close_positions.push_back ((int) rint (posns[beam_dir]));
+      far_positions.push_back ((int) rint (posns[-beam_dir]));

     }
 
     }
 

-  if (is_concave_single_notes (far_positions, beam_dir)) 
-    {
-      Drul_array<Real> pos = ly_scm2interval (me->get_property ("positions"));
-      Real r = linear_combination (pos, 0.0);
+  Real concaveness = 0.0;

 
 

-      r /= Staff_symbol_referencer::staff_space (me);
-      me->set_property ("positions", ly_interval2scm (Drul_array<Real> (r, r)));
-      me->set_property ("least-squares-dy", scm_make_real (0));
+  if (is_concave_single_notes (far_positions, beam_dir))
+    {
+      concaveness = 10000;

     }
   else
     {
     }
   else
     {

-      Real concaveness = (calc_concaveness (far_positions, beam_dir)
-                         + calc_concaveness (close_positions, beam_dir))/2;
-      
-
-      me->set_property ("concaveness", scm_from_double (concaveness));
+      concaveness = (calc_positions_concaveness (far_positions, beam_dir)
+                    + calc_positions_concaveness (close_positions, beam_dir)) / 2;

     }
     }

-  
-  return SCM_UNSPECIFIED;
+
+  return scm_from_double (concaveness);

 }
 }

+
+
+