X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fprob-scheme.cc;h=7e0b560912ebf19ed2aae3e64dd3069351d80cd4;hb=489ffb188ae02237fa0a22763d08841a669dc2a4;hp=bfa355d9a2a616455fe805cb4d2b33223f889347;hpb=0c5bcc9f980e3dc40b53543a957bbf353d7c2308;p=lilypond.git

diff --git a/lily/prob-scheme.cc b/lily/prob-scheme.cc
index bfa355d9a2..7e0b560912 100644
--- a/lily/prob-scheme.cc
+++ b/lily/prob-scheme.cc
@@ -3,18 +3,19 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 2005--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  (c) 2005--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
 */
 
 #include "prob.hh"
+#include "skyline.hh"
 
 LY_DEFINE (ly_prob_set_property_x, "ly:prob-set-property!",
 	   2, 1, 0, (SCM obj, SCM sym, SCM value),
 	   "Set property @var{sym} of @var{obj} to @var{value}")
 {
+  LY_ASSERT_SMOB (Prob, obj, 1);
   Prob *ps = unsmob_prob (obj);
-  SCM_ASSERT_TYPE (ps, obj, SCM_ARG1, __FUNCTION__, "Prob");
-  SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
+  LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
 
   ps->set_property (sym, value);
   return SCM_UNSPECIFIED;
@@ -22,7 +23,7 @@ LY_DEFINE (ly_prob_set_property_x, "ly:prob-set-property!",
 
 /*
   Hmm, this is not orthogonal.
- */
+*/
 LY_DEFINE (ly_prob_property_p, "ly:prob-property?",
 	   2, 1, 0, (SCM obj, SCM sym),
 	   "Is boolean prop @var{sym} set?")
@@ -34,9 +35,9 @@ LY_DEFINE (ly_prob_property, "ly:prob-property",
 	   2, 1, 0, (SCM obj, SCM sym, SCM dfault),
 	   "Return the value for @var{sym}.")
 {
+  LY_ASSERT_SMOB (Prob, obj, 1);
   Prob *ps = unsmob_prob (obj);
-  SCM_ASSERT_TYPE (ps, obj, SCM_ARG1, __FUNCTION__, "Prob");
-  SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
+  LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
 
   if (dfault == SCM_UNDEFINED)
     dfault = SCM_EOL;
@@ -54,7 +55,7 @@ LY_DEFINE (ly_prob_type_p, "ly:prob-type?",
 	   "If obj the specified prob-type?")
 {
   Prob*prob = unsmob_prob (obj);
-  return scm_from_bool (prob && prob->type() == type);
+  return scm_from_bool (prob && prob->type () == type);
 }
 
 LY_DEFINE (ly_make_prob, "ly:make-prob",
@@ -77,9 +78,34 @@ LY_DEFINE (ly_make_prob, "ly:make-prob",
 }
 
   
-LY_DEFINE(ly_paper_system_p, "ly:paper-system?",
+LY_DEFINE (ly_paper_system_p, "ly:paper-system?",
 	  1, 0, 0, (SCM obj),
 	  "Type predicate.")
 {
   return ly_prob_type_p (obj, ly_symbol2scm ("paper-system"));
 }
+
+LY_DEFINE (ly_paper_system_minimum_distance, "ly:paper-system-minimum-distance",
+	   2, 0, 0, (SCM sys1, SCM sys2),
+	   "Measure the minimum distance between these two paper-systems "
+	   "using their stored skylines if possible and falling back to "
+	   "their extents otherwise.")
+{
+  Real ret = 0;
+  Prob *p1 = unsmob_prob (sys1);
+  Prob *p2 = unsmob_prob (sys2);
+  Skyline_pair *sky1 = Skyline_pair::unsmob (p1->get_property ("vertical-skylines"));
+  Skyline_pair *sky2 = Skyline_pair::unsmob (p2->get_property ("vertical-skylines"));
+
+  if (sky1 && sky2)
+    ret = (*sky1)[DOWN].distance ((*sky2)[UP]);
+  else
+    {
+      Stencil *s1 = unsmob_stencil (p1->get_property ("stencil"));
+      Stencil *s2 = unsmob_stencil (p2->get_property ("stencil"));
+      Interval iv1 = s1->extent (Y_AXIS);
+      Interval iv2 = s2->extent (Y_AXIS);
+      ret = iv2[UP] - iv1[DOWN];
+    }
+  return scm_from_double (ret);
+}